| /* Subroutines used for code generation on TI MSP430 processors. |
| Copyright (C) 2012-2017 Free Software Foundation, Inc. |
| Contributed by Red Hat. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| GCC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "backend.h" |
| #include "target.h" |
| #include "rtl.h" |
| #include "tree.h" |
| #include "stringpool.h" |
| #include "attribs.h" |
| #include "gimple-expr.h" |
| #include "df.h" |
| #include "memmodel.h" |
| #include "tm_p.h" |
| #include "regs.h" |
| #include "emit-rtl.h" |
| #include "diagnostic-core.h" |
| #include "fold-const.h" |
| #include "stor-layout.h" |
| #include "calls.h" |
| #include "output.h" |
| #include "explow.h" |
| #include "expr.h" |
| #include "langhooks.h" |
| #include "builtins.h" |
| #include "intl.h" |
| |
| /* This file should be included last. */ |
| #include "target-def.h" |
| |
| |
| static void msp430_compute_frame_info (void); |
| |
| |
| |
| /* Run-time Target Specification. */ |
| |
| bool msp430x = true; |
| |
| struct GTY(()) machine_function |
| { |
| /* If set, the rest of the fields have been computed. */ |
| int computed; |
| /* Which registers need to be saved in the pro/epilogue. */ |
| int need_to_save [FIRST_PSEUDO_REGISTER]; |
| |
| /* These fields describe the frame layout... */ |
| /* arg pointer */ |
| /* 2/4 bytes for saved PC */ |
| int framesize_regs; |
| /* frame pointer */ |
| int framesize_locals; |
| int framesize_outgoing; |
| /* stack pointer */ |
| int framesize; |
| |
| /* How much we adjust the stack when returning from an exception |
| handler. */ |
| rtx eh_stack_adjust; |
| }; |
| |
| /* This is our init_machine_status, as set in |
| msp_option_override. */ |
| static struct machine_function * |
| msp430_init_machine_status (void) |
| { |
| struct machine_function *m; |
| |
| m = ggc_cleared_alloc<machine_function> (); |
| |
| return m; |
| } |
| |
| #undef TARGET_OPTION_OVERRIDE |
| #define TARGET_OPTION_OVERRIDE msp430_option_override |
| |
| /* This is a copy of the same data structure found in gas/config/tc-msp430.c |
| Also another (sort-of) copy can be found in gcc/config/msp430/t-msp430 |
| Keep these three structures in sync. |
| The data in this structure has been extracted from version 1.194 of the |
| devices.csv file released by TI in September 2016. */ |
| |
| struct msp430_mcu_data |
| { |
| const char * name; |
| unsigned int revision; /* 0=> MSP430, 1=>MSP430X, 2=> MSP430Xv2. */ |
| unsigned int hwmpy; /* 0=>none, 1=>16-bit, 2=>16-bit w/sign extend, 4=>32-bit, 8=> 32-bit (5xx). */ |
| } |
| msp430_mcu_data [] = |
| { |
| { "cc430f5123",2,8 }, |
| { "cc430f5125",2,8 }, |
| { "cc430f5133",2,8 }, |
| { "cc430f5135",2,8 }, |
| { "cc430f5137",2,8 }, |
| { "cc430f5143",2,8 }, |
| { "cc430f5145",2,8 }, |
| { "cc430f5147",2,8 }, |
| { "cc430f6125",2,8 }, |
| { "cc430f6126",2,8 }, |
| { "cc430f6127",2,8 }, |
| { "cc430f6135",2,8 }, |
| { "cc430f6137",2,8 }, |
| { "cc430f6143",2,8 }, |
| { "cc430f6145",2,8 }, |
| { "cc430f6147",2,8 }, |
| { "msp430afe221",0,2 }, |
| { "msp430afe222",0,2 }, |
| { "msp430afe223",0,2 }, |
| { "msp430afe231",0,2 }, |
| { "msp430afe232",0,2 }, |
| { "msp430afe233",0,2 }, |
| { "msp430afe251",0,2 }, |
| { "msp430afe252",0,2 }, |
| { "msp430afe253",0,2 }, |
| { "msp430bt5190",2,8 }, |
| { "msp430c091",0,0 }, |
| { "msp430c092",0,0 }, |
| { "msp430c111",0,0 }, |
| { "msp430c1111",0,0 }, |
| { "msp430c112",0,0 }, |
| { "msp430c1121",0,0 }, |
| { "msp430c1331",0,0 }, |
| { "msp430c1351",0,0 }, |
| { "msp430c311s",0,0 }, |
| { "msp430c312",0,0 }, |
| { "msp430c313",0,0 }, |
| { "msp430c314",0,0 }, |
| { "msp430c315",0,0 }, |
| { "msp430c323",0,0 }, |
| { "msp430c325",0,0 }, |
| { "msp430c336",0,1 }, |
| { "msp430c337",0,1 }, |
| { "msp430c412",0,0 }, |
| { "msp430c413",0,0 }, |
| { "msp430cg4616",1,1 }, |
| { "msp430cg4617",1,1 }, |
| { "msp430cg4618",1,1 }, |
| { "msp430cg4619",1,1 }, |
| { "msp430e112",0,0 }, |
| { "msp430e313",0,0 }, |
| { "msp430e315",0,0 }, |
| { "msp430e325",0,0 }, |
| { "msp430e337",0,1 }, |
| { "msp430f110",0,0 }, |
| { "msp430f1101",0,0 }, |
| { "msp430f1101a",0,0 }, |
| { "msp430f1111",0,0 }, |
| { "msp430f1111a",0,0 }, |
| { "msp430f112",0,0 }, |
| { "msp430f1121",0,0 }, |
| { "msp430f1121a",0,0 }, |
| { "msp430f1122",0,0 }, |
| { "msp430f1132",0,0 }, |
| { "msp430f122",0,0 }, |
| { "msp430f1222",0,0 }, |
| { "msp430f123",0,0 }, |
| { "msp430f1232",0,0 }, |
| { "msp430f133",0,0 }, |
| { "msp430f135",0,0 }, |
| { "msp430f147",0,1 }, |
| { "msp430f1471",0,1 }, |
| { "msp430f148",0,1 }, |
| { "msp430f1481",0,1 }, |
| { "msp430f149",0,1 }, |
| { "msp430f1491",0,1 }, |
| { "msp430f155",0,0 }, |
| { "msp430f156",0,0 }, |
| { "msp430f157",0,0 }, |
| { "msp430f1610",0,1 }, |
| { "msp430f1611",0,1 }, |
| { "msp430f1612",0,1 }, |
| { "msp430f167",0,1 }, |
| { "msp430f168",0,1 }, |
| { "msp430f169",0,1 }, |
| { "msp430f2001",0,0 }, |
| { "msp430f2002",0,0 }, |
| { "msp430f2003",0,0 }, |
| { "msp430f2011",0,0 }, |
| { "msp430f2012",0,0 }, |
| { "msp430f2013",0,0 }, |
| { "msp430f2101",0,0 }, |
| { "msp430f2111",0,0 }, |
| { "msp430f2112",0,0 }, |
| { "msp430f2121",0,0 }, |
| { "msp430f2122",0,0 }, |
| { "msp430f2131",0,0 }, |
| { "msp430f2132",0,0 }, |
| { "msp430f2232",0,0 }, |
| { "msp430f2234",0,0 }, |
| { "msp430f2252",0,0 }, |
| { "msp430f2254",0,0 }, |
| { "msp430f2272",0,0 }, |
| { "msp430f2274",0,0 }, |
| { "msp430f233",0,2 }, |
| { "msp430f2330",0,2 }, |
| { "msp430f235",0,2 }, |
| { "msp430f2350",0,2 }, |
| { "msp430f2370",0,2 }, |
| { "msp430f2410",0,2 }, |
| { "msp430f2416",1,2 }, |
| { "msp430f2417",1,2 }, |
| { "msp430f2418",1,2 }, |
| { "msp430f2419",1,2 }, |
| { "msp430f247",0,2 }, |
| { "msp430f2471",0,2 }, |
| { "msp430f248",0,2 }, |
| { "msp430f2481",0,2 }, |
| { "msp430f249",0,2 }, |
| { "msp430f2491",0,2 }, |
| { "msp430f2616",1,2 }, |
| { "msp430f2617",1,2 }, |
| { "msp430f2618",1,2 }, |
| { "msp430f2619",1,2 }, |
| { "msp430f412",0,0 }, |
| { "msp430f413",0,0 }, |
| { "msp430f4132",0,0 }, |
| { "msp430f415",0,0 }, |
| { "msp430f4152",0,0 }, |
| { "msp430f417",0,0 }, |
| { "msp430f423",0,1 }, |
| { "msp430f423a",0,1 }, |
| { "msp430f425",0,1 }, |
| { "msp430f4250",0,0 }, |
| { "msp430f425a",0,1 }, |
| { "msp430f4260",0,0 }, |
| { "msp430f427",0,1 }, |
| { "msp430f4270",0,0 }, |
| { "msp430f427a",0,1 }, |
| { "msp430f435",0,0 }, |
| { "msp430f4351",0,0 }, |
| { "msp430f436",0,0 }, |
| { "msp430f4361",0,0 }, |
| { "msp430f437",0,0 }, |
| { "msp430f4371",0,0 }, |
| { "msp430f438",0,0 }, |
| { "msp430f439",0,0 }, |
| { "msp430f447",0,1 }, |
| { "msp430f448",0,1 }, |
| { "msp430f4481",0,1 }, |
| { "msp430f449",0,1 }, |
| { "msp430f4491",0,1 }, |
| { "msp430f4616",1,1 }, |
| { "msp430f46161",1,1 }, |
| { "msp430f4617",1,1 }, |
| { "msp430f46171",1,1 }, |
| { "msp430f4618",1,1 }, |
| { "msp430f46181",1,1 }, |
| { "msp430f4619",1,1 }, |
| { "msp430f46191",1,1 }, |
| { "msp430f47126",1,4 }, |
| { "msp430f47127",1,4 }, |
| { "msp430f47163",1,4 }, |
| { "msp430f47166",1,4 }, |
| { "msp430f47167",1,4 }, |
| { "msp430f47173",1,4 }, |
| { "msp430f47176",1,4 }, |
| { "msp430f47177",1,4 }, |
| { "msp430f47183",1,4 }, |
| { "msp430f47186",1,4 }, |
| { "msp430f47187",1,4 }, |
| { "msp430f47193",1,4 }, |
| { "msp430f47196",1,4 }, |
| { "msp430f47197",1,4 }, |
| { "msp430f477",0,0 }, |
| { "msp430f478",0,0 }, |
| { "msp430f4783",0,4 }, |
| { "msp430f4784",0,4 }, |
| { "msp430f479",0,0 }, |
| { "msp430f4793",0,4 }, |
| { "msp430f4794",0,4 }, |
| { "msp430f5131",2,8 }, |
| { "msp430f5132",2,8 }, |
| { "msp430f5151",2,8 }, |
| { "msp430f5152",2,8 }, |
| { "msp430f5171",2,8 }, |
| { "msp430f5172",2,8 }, |
| { "msp430f5212",2,8 }, |
| { "msp430f5213",2,8 }, |
| { "msp430f5214",2,8 }, |
| { "msp430f5217",2,8 }, |
| { "msp430f5218",2,8 }, |
| { "msp430f5219",2,8 }, |
| { "msp430f5222",2,8 }, |
| { "msp430f5223",2,8 }, |
| { "msp430f5224",2,8 }, |
| { "msp430f5227",2,8 }, |
| { "msp430f5228",2,8 }, |
| { "msp430f5229",2,8 }, |
| { "msp430f5232",2,8 }, |
| { "msp430f5234",2,8 }, |
| { "msp430f5237",2,8 }, |
| { "msp430f5239",2,8 }, |
| { "msp430f5242",2,8 }, |
| { "msp430f5244",2,8 }, |
| { "msp430f5247",2,8 }, |
| { "msp430f5249",2,8 }, |
| { "msp430f5252",2,8 }, |
| { "msp430f5253",2,8 }, |
| { "msp430f5254",2,8 }, |
| { "msp430f5255",2,8 }, |
| { "msp430f5256",2,8 }, |
| { "msp430f5257",2,8 }, |
| { "msp430f5258",2,8 }, |
| { "msp430f5259",2,8 }, |
| { "msp430f5304",2,8 }, |
| { "msp430f5308",2,8 }, |
| { "msp430f5309",2,8 }, |
| { "msp430f5310",2,8 }, |
| { "msp430f5324",2,8 }, |
| { "msp430f5325",2,8 }, |
| { "msp430f5326",2,8 }, |
| { "msp430f5327",2,8 }, |
| { "msp430f5328",2,8 }, |
| { "msp430f5329",2,8 }, |
| { "msp430f5333",2,8 }, |
| { "msp430f5335",2,8 }, |
| { "msp430f5336",2,8 }, |
| { "msp430f5338",2,8 }, |
| { "msp430f5340",2,8 }, |
| { "msp430f5341",2,8 }, |
| { "msp430f5342",2,8 }, |
| { "msp430f5358",2,8 }, |
| { "msp430f5359",2,8 }, |
| { "msp430f5418",2,8 }, |
| { "msp430f5418a",2,8 }, |
| { "msp430f5419",2,8 }, |
| { "msp430f5419a",2,8 }, |
| { "msp430f5435",2,8 }, |
| { "msp430f5435a",2,8 }, |
| { "msp430f5436",2,8 }, |
| { "msp430f5436a",2,8 }, |
| { "msp430f5437",2,8 }, |
| { "msp430f5437a",2,8 }, |
| { "msp430f5438",2,8 }, |
| { "msp430f5438a",2,8 }, |
| { "msp430f5500",2,8 }, |
| { "msp430f5501",2,8 }, |
| { "msp430f5502",2,8 }, |
| { "msp430f5503",2,8 }, |
| { "msp430f5504",2,8 }, |
| { "msp430f5505",2,8 }, |
| { "msp430f5506",2,8 }, |
| { "msp430f5507",2,8 }, |
| { "msp430f5508",2,8 }, |
| { "msp430f5509",2,8 }, |
| { "msp430f5510",2,8 }, |
| { "msp430f5513",2,8 }, |
| { "msp430f5514",2,8 }, |
| { "msp430f5515",2,8 }, |
| { "msp430f5517",2,8 }, |
| { "msp430f5519",2,8 }, |
| { "msp430f5521",2,8 }, |
| { "msp430f5522",2,8 }, |
| { "msp430f5524",2,8 }, |
| { "msp430f5525",2,8 }, |
| { "msp430f5526",2,8 }, |
| { "msp430f5527",2,8 }, |
| { "msp430f5528",2,8 }, |
| { "msp430f5529",2,8 }, |
| { "msp430f5630",2,8 }, |
| { "msp430f5631",2,8 }, |
| { "msp430f5632",2,8 }, |
| { "msp430f5633",2,8 }, |
| { "msp430f5634",2,8 }, |
| { "msp430f5635",2,8 }, |
| { "msp430f5636",2,8 }, |
| { "msp430f5637",2,8 }, |
| { "msp430f5638",2,8 }, |
| { "msp430f5658",2,8 }, |
| { "msp430f5659",2,8 }, |
| { "msp430f5xx_6xxgeneric",2,8 }, |
| { "msp430f6433",2,8 }, |
| { "msp430f6435",2,8 }, |
| { "msp430f6436",2,8 }, |
| { "msp430f6438",2,8 }, |
| { "msp430f6458",2,8 }, |
| { "msp430f6459",2,8 }, |
| { "msp430f6630",2,8 }, |
| { "msp430f6631",2,8 }, |
| { "msp430f6632",2,8 }, |
| { "msp430f6633",2,8 }, |
| { "msp430f6634",2,8 }, |
| { "msp430f6635",2,8 }, |
| { "msp430f6636",2,8 }, |
| { "msp430f6637",2,8 }, |
| { "msp430f6638",2,8 }, |
| { "msp430f6658",2,8 }, |
| { "msp430f6659",2,8 }, |
| { "msp430f6720",2,8 }, |
| { "msp430f6720a",2,8 }, |
| { "msp430f6721",2,8 }, |
| { "msp430f6721a",2,8 }, |
| { "msp430f6723",2,8 }, |
| { "msp430f6723a",2,8 }, |
| { "msp430f6724",2,8 }, |
| { "msp430f6724a",2,8 }, |
| { "msp430f6725",2,8 }, |
| { "msp430f6725a",2,8 }, |
| { "msp430f6726",2,8 }, |
| { "msp430f6726a",2,8 }, |
| { "msp430f6730",2,8 }, |
| { "msp430f6730a",2,8 }, |
| { "msp430f6731",2,8 }, |
| { "msp430f6731a",2,8 }, |
| { "msp430f6733",2,8 }, |
| { "msp430f6733a",2,8 }, |
| { "msp430f6734",2,8 }, |
| { "msp430f6734a",2,8 }, |
| { "msp430f6735",2,8 }, |
| { "msp430f6735a",2,8 }, |
| { "msp430f6736",2,8 }, |
| { "msp430f6736a",2,8 }, |
| { "msp430f6745",2,8 }, |
| { "msp430f67451",2,8 }, |
| { "msp430f67451a",2,8 }, |
| { "msp430f6745a",2,8 }, |
| { "msp430f6746",2,8 }, |
| { "msp430f67461",2,8 }, |
| { "msp430f67461a",2,8 }, |
| { "msp430f6746a",2,8 }, |
| { "msp430f6747",2,8 }, |
| { "msp430f67471",2,8 }, |
| { "msp430f67471a",2,8 }, |
| { "msp430f6747a",2,8 }, |
| { "msp430f6748",2,8 }, |
| { "msp430f67481",2,8 }, |
| { "msp430f67481a",2,8 }, |
| { "msp430f6748a",2,8 }, |
| { "msp430f6749",2,8 }, |
| { "msp430f67491",2,8 }, |
| { "msp430f67491a",2,8 }, |
| { "msp430f6749a",2,8 }, |
| { "msp430f67621",2,8 }, |
| { "msp430f67621a",2,8 }, |
| { "msp430f67641",2,8 }, |
| { "msp430f67641a",2,8 }, |
| { "msp430f6765",2,8 }, |
| { "msp430f67651",2,8 }, |
| { "msp430f67651a",2,8 }, |
| { "msp430f6765a",2,8 }, |
| { "msp430f6766",2,8 }, |
| { "msp430f67661",2,8 }, |
| { "msp430f67661a",2,8 }, |
| { "msp430f6766a",2,8 }, |
| { "msp430f6767",2,8 }, |
| { "msp430f67671",2,8 }, |
| { "msp430f67671a",2,8 }, |
| { "msp430f6767a",2,8 }, |
| { "msp430f6768",2,8 }, |
| { "msp430f67681",2,8 }, |
| { "msp430f67681a",2,8 }, |
| { "msp430f6768a",2,8 }, |
| { "msp430f6769",2,8 }, |
| { "msp430f67691",2,8 }, |
| { "msp430f67691a",2,8 }, |
| { "msp430f6769a",2,8 }, |
| { "msp430f6775",2,8 }, |
| { "msp430f67751",2,8 }, |
| { "msp430f67751a",2,8 }, |
| { "msp430f6775a",2,8 }, |
| { "msp430f6776",2,8 }, |
| { "msp430f67761",2,8 }, |
| { "msp430f67761a",2,8 }, |
| { "msp430f6776a",2,8 }, |
| { "msp430f6777",2,8 }, |
| { "msp430f67771",2,8 }, |
| { "msp430f67771a",2,8 }, |
| { "msp430f6777a",2,8 }, |
| { "msp430f6778",2,8 }, |
| { "msp430f67781",2,8 }, |
| { "msp430f67781a",2,8 }, |
| { "msp430f6778a",2,8 }, |
| { "msp430f6779",2,8 }, |
| { "msp430f67791",2,8 }, |
| { "msp430f67791a",2,8 }, |
| { "msp430f6779a",2,8 }, |
| { "msp430fe423",0,0 }, |
| { "msp430fe4232",0,0 }, |
| { "msp430fe423a",0,0 }, |
| { "msp430fe4242",0,0 }, |
| { "msp430fe425",0,0 }, |
| { "msp430fe4252",0,0 }, |
| { "msp430fe425a",0,0 }, |
| { "msp430fe427",0,0 }, |
| { "msp430fe4272",0,0 }, |
| { "msp430fe427a",0,0 }, |
| { "msp430fg4250",0,0 }, |
| { "msp430fg4260",0,0 }, |
| { "msp430fg4270",0,0 }, |
| { "msp430fg437",0,0 }, |
| { "msp430fg438",0,0 }, |
| { "msp430fg439",0,0 }, |
| { "msp430fg4616",1,1 }, |
| { "msp430fg4617",1,1 }, |
| { "msp430fg4618",1,1 }, |
| { "msp430fg4619",1,1 }, |
| { "msp430fg477",0,0 }, |
| { "msp430fg478",0,0 }, |
| { "msp430fg479",0,0 }, |
| { "msp430fg6425",2,8 }, |
| { "msp430fg6426",2,8 }, |
| { "msp430fg6625",2,8 }, |
| { "msp430fg6626",2,8 }, |
| { "msp430fr2032",2,0 }, |
| { "msp430fr2033",2,0 }, |
| { "msp430fr2110",2,0 }, |
| { "msp430fr2111",2,0 }, |
| { "msp430fr2310",2,0 }, |
| { "msp430fr2311",2,0 }, |
| { "msp430fr2433",2,8 }, |
| { "msp430fr2532",2,8 }, |
| { "msp430fr2533",2,8 }, |
| { "msp430fr2632",2,8 }, |
| { "msp430fr2633",2,8 }, |
| { "msp430fr2xx_4xxgeneric",2,8 }, |
| { "msp430fr4131",2,0 }, |
| { "msp430fr4132",2,0 }, |
| { "msp430fr4133",2,0 }, |
| { "msp430fr5720",2,8 }, |
| { "msp430fr5721",2,8 }, |
| { "msp430fr5722",2,8 }, |
| { "msp430fr5723",2,8 }, |
| { "msp430fr5724",2,8 }, |
| { "msp430fr5725",2,8 }, |
| { "msp430fr5726",2,8 }, |
| { "msp430fr5727",2,8 }, |
| { "msp430fr5728",2,8 }, |
| { "msp430fr5729",2,8 }, |
| { "msp430fr5730",2,8 }, |
| { "msp430fr5731",2,8 }, |
| { "msp430fr5732",2,8 }, |
| { "msp430fr5733",2,8 }, |
| { "msp430fr5734",2,8 }, |
| { "msp430fr5735",2,8 }, |
| { "msp430fr5736",2,8 }, |
| { "msp430fr5737",2,8 }, |
| { "msp430fr5738",2,8 }, |
| { "msp430fr5739",2,8 }, |
| { "msp430fr57xxgeneric",2,8 }, |
| { "msp430fr5847",2,8 }, |
| { "msp430fr58471",2,8 }, |
| { "msp430fr5848",2,8 }, |
| { "msp430fr5849",2,8 }, |
| { "msp430fr5857",2,8 }, |
| { "msp430fr5858",2,8 }, |
| { "msp430fr5859",2,8 }, |
| { "msp430fr5867",2,8 }, |
| { "msp430fr58671",2,8 }, |
| { "msp430fr5868",2,8 }, |
| { "msp430fr5869",2,8 }, |
| { "msp430fr5870",2,8 }, |
| { "msp430fr5872",2,8 }, |
| { "msp430fr58721",2,8 }, |
| { "msp430fr5887",2,8 }, |
| { "msp430fr5888",2,8 }, |
| { "msp430fr5889",2,8 }, |
| { "msp430fr58891",2,8 }, |
| { "msp430fr5922",2,8 }, |
| { "msp430fr59221",2,8 }, |
| { "msp430fr5947",2,8 }, |
| { "msp430fr59471",2,8 }, |
| { "msp430fr5948",2,8 }, |
| { "msp430fr5949",2,8 }, |
| { "msp430fr5957",2,8 }, |
| { "msp430fr5958",2,8 }, |
| { "msp430fr5959",2,8 }, |
| { "msp430fr5962",2,8 }, |
| { "msp430fr5964",2,8 }, |
| { "msp430fr5967",2,8 }, |
| { "msp430fr5968",2,8 }, |
| { "msp430fr5969",2,8 }, |
| { "msp430fr59691",2,8 }, |
| { "msp430fr5970",2,8 }, |
| { "msp430fr5972",2,8 }, |
| { "msp430fr59721",2,8 }, |
| { "msp430fr5986",2,8 }, |
| { "msp430fr5987",2,8 }, |
| { "msp430fr5988",2,8 }, |
| { "msp430fr5989",2,8 }, |
| { "msp430fr59891",2,8 }, |
| { "msp430fr5992",2,8 }, |
| { "msp430fr5994",2,8 }, |
| { "msp430fr59941",2,8 }, |
| { "msp430fr5xx_6xxgeneric",2,8 }, |
| { "msp430fr6820",2,8 }, |
| { "msp430fr6822",2,8 }, |
| { "msp430fr68221",2,8 }, |
| { "msp430fr6870",2,8 }, |
| { "msp430fr6872",2,8 }, |
| { "msp430fr68721",2,8 }, |
| { "msp430fr6877",2,8 }, |
| { "msp430fr6879",2,8 }, |
| { "msp430fr68791",2,8 }, |
| { "msp430fr6887",2,8 }, |
| { "msp430fr6888",2,8 }, |
| { "msp430fr6889",2,8 }, |
| { "msp430fr68891",2,8 }, |
| { "msp430fr6920",2,8 }, |
| { "msp430fr6922",2,8 }, |
| { "msp430fr69221",2,8 }, |
| { "msp430fr6927",2,8 }, |
| { "msp430fr69271",2,8 }, |
| { "msp430fr6928",2,8 }, |
| { "msp430fr6970",2,8 }, |
| { "msp430fr6972",2,8 }, |
| { "msp430fr69721",2,8 }, |
| { "msp430fr6977",2,8 }, |
| { "msp430fr6979",2,8 }, |
| { "msp430fr69791",2,8 }, |
| { "msp430fr6987",2,8 }, |
| { "msp430fr6988",2,8 }, |
| { "msp430fr6989",2,8 }, |
| { "msp430fr69891",2,8 }, |
| { "msp430fw423",0,0 }, |
| { "msp430fw425",0,0 }, |
| { "msp430fw427",0,0 }, |
| { "msp430fw428",0,0 }, |
| { "msp430fw429",0,0 }, |
| { "msp430g2001",0,0 }, |
| { "msp430g2101",0,0 }, |
| { "msp430g2102",0,0 }, |
| { "msp430g2111",0,0 }, |
| { "msp430g2112",0,0 }, |
| { "msp430g2113",0,0 }, |
| { "msp430g2121",0,0 }, |
| { "msp430g2131",0,0 }, |
| { "msp430g2132",0,0 }, |
| { "msp430g2152",0,0 }, |
| { "msp430g2153",0,0 }, |
| { "msp430g2201",0,0 }, |
| { "msp430g2202",0,0 }, |
| { "msp430g2203",0,0 }, |
| { "msp430g2210",0,0 }, |
| { "msp430g2211",0,0 }, |
| { "msp430g2212",0,0 }, |
| { "msp430g2213",0,0 }, |
| { "msp430g2221",0,0 }, |
| { "msp430g2230",0,0 }, |
| { "msp430g2231",0,0 }, |
| { "msp430g2232",0,0 }, |
| { "msp430g2233",0,0 }, |
| { "msp430g2252",0,0 }, |
| { "msp430g2253",0,0 }, |
| { "msp430g2302",0,0 }, |
| { "msp430g2303",0,0 }, |
| { "msp430g2312",0,0 }, |
| { "msp430g2313",0,0 }, |
| { "msp430g2332",0,0 }, |
| { "msp430g2333",0,0 }, |
| { "msp430g2352",0,0 }, |
| { "msp430g2353",0,0 }, |
| { "msp430g2402",0,0 }, |
| { "msp430g2403",0,0 }, |
| { "msp430g2412",0,0 }, |
| { "msp430g2413",0,0 }, |
| { "msp430g2432",0,0 }, |
| { "msp430g2433",0,0 }, |
| { "msp430g2444",0,0 }, |
| { "msp430g2452",0,0 }, |
| { "msp430g2453",0,0 }, |
| { "msp430g2513",0,0 }, |
| { "msp430g2533",0,0 }, |
| { "msp430g2544",0,0 }, |
| { "msp430g2553",0,0 }, |
| { "msp430g2744",0,0 }, |
| { "msp430g2755",0,0 }, |
| { "msp430g2855",0,0 }, |
| { "msp430g2955",0,0 }, |
| { "msp430i2020",0,2 }, |
| { "msp430i2021",0,2 }, |
| { "msp430i2030",0,2 }, |
| { "msp430i2031",0,2 }, |
| { "msp430i2040",0,2 }, |
| { "msp430i2041",0,2 }, |
| { "msp430i2xxgeneric",0,2 }, |
| { "msp430l092",0,0 }, |
| { "msp430p112",0,0 }, |
| { "msp430p313",0,0 }, |
| { "msp430p315",0,0 }, |
| { "msp430p315s",0,0 }, |
| { "msp430p325",0,0 }, |
| { "msp430p337",0,1 }, |
| { "msp430sl5438a",2,8 }, |
| { "msp430tch5e",0,0 }, |
| { "msp430xgeneric",2,8 }, |
| { "rf430f5144",2,8 }, |
| { "rf430f5155",2,8 }, |
| { "rf430f5175",2,8 }, |
| { "rf430frl152h",0,0 }, |
| { "rf430frl152h_rom",0,0 }, |
| { "rf430frl153h",0,0 }, |
| { "rf430frl153h_rom",0,0 }, |
| { "rf430frl154h",0,0 }, |
| { "rf430frl154h_rom",0,0 } |
| }; |
| |
| /* Generate a C preprocessor symbol based upon the MCU selected by the user. |
| If a specific MCU has not been selected then return a generic symbol instead. */ |
| |
| const char * |
| msp430_mcu_name (void) |
| { |
| if (target_mcu) |
| { |
| unsigned int i; |
| static char mcu_name [64]; |
| |
| snprintf (mcu_name, sizeof (mcu_name) - 1, "__%s__", target_mcu); |
| for (i = strlen (mcu_name); i--;) |
| mcu_name[i] = TOUPPER (mcu_name[i]); |
| return mcu_name; |
| } |
| |
| return msp430x ? "__MSP430XGENERIC__" : "__MSP430GENERIC__"; |
| } |
| |
| static const char * |
| hwmult_name (unsigned int val) |
| { |
| switch (val) |
| { |
| case 0: return "none"; |
| case 1: return "16-bit"; |
| case 2: return "16-bit"; |
| case 4: return "32-bit"; |
| case 8: return "32-bit (5xx)"; |
| default: gcc_unreachable (); |
| } |
| } |
| |
| static void |
| msp430_option_override (void) |
| { |
| /* The MSP430 architecture can safely dereference a NULL pointer. In fact, |
| there are memory mapped registers there. */ |
| flag_delete_null_pointer_checks = 0; |
| |
| init_machine_status = msp430_init_machine_status; |
| |
| if (target_cpu) |
| { |
| /* gcc/common/config/msp430-common.c will have |
| already canonicalised the string in target_cpu. */ |
| if (strcasecmp (target_cpu, "msp430x") == 0) |
| msp430x = true; |
| else /* target_cpu == "msp430" - already handled by the front end. */ |
| msp430x = false; |
| } |
| |
| if (target_mcu) |
| { |
| int i; |
| |
| /* FIXME: If the array were alpha sorted, we could use a binary search. */ |
| for (i = ARRAY_SIZE (msp430_mcu_data); i--;) |
| if (strcasecmp (msp430_mcu_data[i].name, target_mcu) == 0) |
| { |
| bool xisa = msp430_mcu_data[i].revision >= 1; |
| |
| if (msp430_warn_mcu) |
| { |
| if (target_cpu&& msp430x != xisa) |
| warning (0, "MCU '%s' supports %s ISA but -mcpu option is set to %s", |
| target_mcu, xisa ? "430X" : "430", msp430x ? "430X" : "430"); |
| |
| if (msp430_mcu_data[i].hwmpy == 0 |
| && msp430_hwmult_type != MSP430_HWMULT_AUTO |
| && msp430_hwmult_type != MSP430_HWMULT_NONE) |
| warning (0, "MCU '%s' does not have hardware multiply support, but -mhwmult is set to %s", |
| target_mcu, |
| msp430_hwmult_type == MSP430_HWMULT_SMALL ? "16-bit" |
| : msp430_hwmult_type == MSP430_HWMULT_LARGE ? "32-bit" : "f5series"); |
| else if (msp430_hwmult_type == MSP430_HWMULT_SMALL |
| && msp430_mcu_data[i].hwmpy != 1 |
| && msp430_mcu_data[i].hwmpy != 2 ) |
| warning (0, "MCU '%s' supports %s hardware multiply, but -mhwmult is set to 16-bit", |
| target_mcu, hwmult_name (msp430_mcu_data[i].hwmpy)); |
| else if (msp430_hwmult_type == MSP430_HWMULT_LARGE && msp430_mcu_data[i].hwmpy != 4) |
| warning (0, "MCU '%s' supports %s hardware multiply, but -mhwmult is set to 32-bit", |
| target_mcu, hwmult_name (msp430_mcu_data[i].hwmpy)); |
| else if (msp430_hwmult_type == MSP430_HWMULT_F5SERIES && msp430_mcu_data[i].hwmpy != 8) |
| warning (0, "MCU '%s' supports %s hardware multiply, but -mhwmult is set to f5series", |
| target_mcu, hwmult_name (msp430_mcu_data[i].hwmpy)); |
| } |
| |
| msp430x = xisa; |
| break; |
| } |
| |
| if (i < 0) |
| { |
| if (msp430_hwmult_type == MSP430_HWMULT_AUTO) |
| { |
| if (msp430_warn_mcu) |
| { |
| if (target_cpu == NULL) |
| warning (0, |
| "Unrecognized MCU name '%s', assuming that it is " |
| "just a MSP430 with no hardware multiply.\n" |
| "Use the -mcpu and -mhwmult options to set " |
| "these explicitly.", |
| target_mcu); |
| else |
| warning (0, |
| "Unrecognized MCU name '%s', assuming that it " |
| "has no hardware multiply.\nUse the -mhwmult " |
| "option to set this explicitly.", |
| target_mcu); |
| } |
| |
| msp430_hwmult_type = MSP430_HWMULT_NONE; |
| } |
| else if (target_cpu == NULL) |
| { |
| if (msp430_warn_mcu) |
| warning (0, |
| "Unrecognized MCU name '%s', assuming that it just " |
| "supports the MSP430 ISA.\nUse the -mcpu option to " |
| "set the ISA explicitly.", |
| target_mcu); |
| |
| msp430x = false; |
| } |
| else if (msp430_warn_mcu) |
| warning (0, "Unrecognized MCU name '%s'.", target_mcu); |
| } |
| } |
| |
| /* The F5 series are all able to support the 430X ISA. */ |
| if (target_cpu == NULL && target_mcu == NULL && msp430_hwmult_type == MSP430_HWMULT_F5SERIES) |
| msp430x = true; |
| |
| if (TARGET_LARGE && !msp430x) |
| error ("-mlarge requires a 430X-compatible -mmcu="); |
| |
| if (msp430_code_region == MSP430_REGION_UPPER && ! msp430x) |
| error ("-mcode-region=upper requires 430X-compatible cpu"); |
| if (msp430_data_region == MSP430_REGION_UPPER && ! msp430x) |
| error ("-mdata-region=upper requires 430X-compatible cpu"); |
| |
| if (flag_exceptions || flag_non_call_exceptions |
| || flag_unwind_tables || flag_asynchronous_unwind_tables) |
| flag_omit_frame_pointer = false; |
| else |
| flag_omit_frame_pointer = true; |
| |
| /* This is a hack to work around a problem with the newlib build |
| mechanism. Newlib always appends CFLAGS to the end of the GCC |
| command line and always sets -O2 in CFLAGS. Thus it is not |
| possible to build newlib with -Os enabled. Until now... */ |
| if (TARGET_OPT_SPACE && optimize < 3) |
| optimize_size = 1; |
| } |
| |
| #undef TARGET_SCALAR_MODE_SUPPORTED_P |
| #define TARGET_SCALAR_MODE_SUPPORTED_P msp430_scalar_mode_supported_p |
| |
| static bool |
| msp430_scalar_mode_supported_p (scalar_mode m) |
| { |
| if (m == PSImode && msp430x) |
| return true; |
| #if 0 |
| if (m == TImode) |
| return true; |
| #endif |
| return default_scalar_mode_supported_p (m); |
| } |
| |
| |
| |
| /* Storage Layout */ |
| |
| #undef TARGET_MS_BITFIELD_LAYOUT_P |
| #define TARGET_MS_BITFIELD_LAYOUT_P msp430_ms_bitfield_layout_p |
| |
| bool |
| msp430_ms_bitfield_layout_p (const_tree record_type ATTRIBUTE_UNUSED) |
| { |
| return false; |
| } |
| |
| |
| |
| /* Register Usage */ |
| |
| #undef TARGET_HARD_REGNO_NREGS |
| #define TARGET_HARD_REGNO_NREGS msp430_hard_regno_nregs |
| |
| static unsigned int |
| msp430_hard_regno_nregs (unsigned int, machine_mode mode) |
| { |
| if (mode == PSImode && msp430x) |
| return 1; |
| return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) |
| / UNITS_PER_WORD); |
| } |
| |
| /* Implements HARD_REGNO_NREGS_HAS_PADDING. */ |
| int |
| msp430_hard_regno_nregs_has_padding (int regno ATTRIBUTE_UNUSED, |
| machine_mode mode) |
| { |
| if (mode == PSImode && msp430x) |
| return 1; |
| return ((GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) |
| / UNITS_PER_WORD); |
| } |
| |
| /* Implements HARD_REGNO_NREGS_WITH_PADDING. */ |
| int |
| msp430_hard_regno_nregs_with_padding (int regno ATTRIBUTE_UNUSED, |
| machine_mode mode) |
| { |
| if (mode == PSImode) |
| return 2; |
| return msp430_hard_regno_nregs (regno, mode); |
| } |
| |
| #undef TARGET_HARD_REGNO_MODE_OK |
| #define TARGET_HARD_REGNO_MODE_OK msp430_hard_regno_mode_ok |
| |
| static bool |
| msp430_hard_regno_mode_ok (unsigned int regno, machine_mode mode) |
| { |
| return regno <= (ARG_POINTER_REGNUM |
| - (unsigned int) msp430_hard_regno_nregs (regno, mode)); |
| } |
| |
| #undef TARGET_MODES_TIEABLE_P |
| #define TARGET_MODES_TIEABLE_P msp430_modes_tieable_p |
| |
| static bool |
| msp430_modes_tieable_p (machine_mode mode1, machine_mode mode2) |
| { |
| if ((mode1 == PSImode || mode2 == SImode) |
| || (mode1 == SImode || mode2 == PSImode)) |
| return false; |
| |
| return ((GET_MODE_CLASS (mode1) == MODE_FLOAT |
| || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) |
| == (GET_MODE_CLASS (mode2) == MODE_FLOAT |
| || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); |
| } |
| |
| #undef TARGET_FRAME_POINTER_REQUIRED |
| #define TARGET_FRAME_POINTER_REQUIRED msp430_frame_pointer_required |
| |
| static bool |
| msp430_frame_pointer_required (void) |
| { |
| return false; |
| } |
| |
| #undef TARGET_CAN_ELIMINATE |
| #define TARGET_CAN_ELIMINATE msp430_can_eliminate |
| |
| static bool |
| msp430_can_eliminate (const int from_reg ATTRIBUTE_UNUSED, |
| const int to_reg ATTRIBUTE_UNUSED) |
| { |
| return true; |
| } |
| |
| /* Implements INITIAL_ELIMINATION_OFFSET. */ |
| int |
| msp430_initial_elimination_offset (int from, int to) |
| { |
| int rv = 0; /* As if arg to arg. */ |
| |
| msp430_compute_frame_info (); |
| |
| switch (to) |
| { |
| case STACK_POINTER_REGNUM: |
| rv += cfun->machine->framesize_outgoing; |
| rv += cfun->machine->framesize_locals; |
| /* Fall through. */ |
| case FRAME_POINTER_REGNUM: |
| rv += cfun->machine->framesize_regs; |
| /* Allow for the saved return address. */ |
| rv += (TARGET_LARGE ? 4 : 2); |
| /* NB/ No need to allow for crtl->args.pretend_args_size. |
| GCC does that for us. */ |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| |
| switch (from) |
| { |
| case FRAME_POINTER_REGNUM: |
| /* Allow for the fall through above. */ |
| rv -= (TARGET_LARGE ? 4 : 2); |
| rv -= cfun->machine->framesize_regs; |
| case ARG_POINTER_REGNUM: |
| break; |
| default: |
| gcc_unreachable (); |
| } |
| |
| return rv; |
| } |
| |
| /* Named Address Space support */ |
| |
| |
| /* Return the appropriate mode for a named address pointer. */ |
| #undef TARGET_ADDR_SPACE_POINTER_MODE |
| #define TARGET_ADDR_SPACE_POINTER_MODE msp430_addr_space_pointer_mode |
| #undef TARGET_ADDR_SPACE_ADDRESS_MODE |
| #define TARGET_ADDR_SPACE_ADDRESS_MODE msp430_addr_space_pointer_mode |
| |
| static scalar_int_mode |
| msp430_addr_space_pointer_mode (addr_space_t addrspace) |
| { |
| switch (addrspace) |
| { |
| default: |
| case ADDR_SPACE_GENERIC: |
| return Pmode; |
| case ADDR_SPACE_NEAR: |
| return HImode; |
| case ADDR_SPACE_FAR: |
| return PSImode; |
| } |
| } |
| |
| /* Function pointers are stored in unwind_word sized |
| variables, so make sure that unwind_word is big enough. */ |
| #undef TARGET_UNWIND_WORD_MODE |
| #define TARGET_UNWIND_WORD_MODE msp430_unwind_word_mode |
| |
| static scalar_int_mode |
| msp430_unwind_word_mode (void) |
| { |
| /* This needs to match msp430_init_dwarf_reg_sizes_extra (below). */ |
| return msp430x ? PSImode : HImode; |
| } |
| |
| /* Determine if one named address space is a subset of another. */ |
| #undef TARGET_ADDR_SPACE_SUBSET_P |
| #define TARGET_ADDR_SPACE_SUBSET_P msp430_addr_space_subset_p |
| static bool |
| msp430_addr_space_subset_p (addr_space_t subset, addr_space_t superset) |
| { |
| if (subset == superset) |
| return true; |
| else |
| return (subset != ADDR_SPACE_FAR && superset == ADDR_SPACE_FAR); |
| } |
| |
| #undef TARGET_ADDR_SPACE_CONVERT |
| #define TARGET_ADDR_SPACE_CONVERT msp430_addr_space_convert |
| /* Convert from one address space to another. */ |
| static rtx |
| msp430_addr_space_convert (rtx op, tree from_type, tree to_type) |
| { |
| addr_space_t from_as = TYPE_ADDR_SPACE (TREE_TYPE (from_type)); |
| addr_space_t to_as = TYPE_ADDR_SPACE (TREE_TYPE (to_type)); |
| rtx result; |
| |
| if (to_as != ADDR_SPACE_FAR && from_as == ADDR_SPACE_FAR) |
| { |
| /* This is unpredictable, as we're truncating off usable address |
| bits. */ |
| |
| if (CONSTANT_P (op)) |
| return gen_rtx_CONST (HImode, op); |
| |
| result = gen_reg_rtx (HImode); |
| emit_insn (gen_truncpsihi2 (result, op)); |
| return result; |
| } |
| else if (to_as == ADDR_SPACE_FAR && from_as != ADDR_SPACE_FAR) |
| { |
| /* This always works. */ |
| |
| if (CONSTANT_P (op)) |
| return gen_rtx_CONST (PSImode, op); |
| |
| result = gen_reg_rtx (PSImode); |
| emit_insn (gen_zero_extendhipsi2 (result, op)); |
| return result; |
| } |
| else |
| gcc_unreachable (); |
| } |
| |
| /* Stack Layout and Calling Conventions. */ |
| |
| /* For each function, we list the gcc version and the TI version on |
| each line, where we're converting the function names. */ |
| static char const * const special_convention_function_names [] = |
| { |
| "__muldi3", "__mspabi_mpyll", |
| "__udivdi3", "__mspabi_divull", |
| "__umoddi3", "__mspabi_remull", |
| "__divdi3", "__mspabi_divlli", |
| "__moddi3", "__mspabi_remlli", |
| "__mspabi_srall", |
| "__mspabi_srlll", |
| "__mspabi_sllll", |
| "__adddf3", "__mspabi_addd", |
| "__subdf3", "__mspabi_subd", |
| "__muldf3", "__mspabi_mpyd", |
| "__divdf3", "__mspabi_divd", |
| "__mspabi_cmpd", |
| NULL |
| }; |
| |
| /* TRUE if the function passed is a "speical" function. Special |
| functions pass two DImode parameters in registers. */ |
| static bool |
| msp430_special_register_convention_p (const char *name) |
| { |
| int i; |
| |
| for (i = 0; special_convention_function_names [i]; i++) |
| if (! strcmp (name, special_convention_function_names [i])) |
| return true; |
| |
| return false; |
| } |
| |
| #undef TARGET_FUNCTION_VALUE_REGNO_P |
| #define TARGET_FUNCTION_VALUE_REGNO_P msp430_function_value_regno_p |
| |
| bool |
| msp430_function_value_regno_p (unsigned int regno) |
| { |
| return regno == 12; |
| } |
| |
| |
| #undef TARGET_FUNCTION_VALUE |
| #define TARGET_FUNCTION_VALUE msp430_function_value |
| |
| rtx |
| msp430_function_value (const_tree ret_type, |
| const_tree fn_decl_or_type ATTRIBUTE_UNUSED, |
| bool outgoing ATTRIBUTE_UNUSED) |
| { |
| return gen_rtx_REG (TYPE_MODE (ret_type), 12); |
| } |
| |
| #undef TARGET_LIBCALL_VALUE |
| #define TARGET_LIBCALL_VALUE msp430_libcall_value |
| |
| rtx |
| msp430_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
| { |
| return gen_rtx_REG (mode, 12); |
| } |
| |
| /* Implements INIT_CUMULATIVE_ARGS. */ |
| void |
| msp430_init_cumulative_args (CUMULATIVE_ARGS *ca, |
| tree fntype ATTRIBUTE_UNUSED, |
| rtx libname ATTRIBUTE_UNUSED, |
| tree fndecl ATTRIBUTE_UNUSED, |
| int n_named_args ATTRIBUTE_UNUSED) |
| { |
| const char *fname; |
| memset (ca, 0, sizeof(*ca)); |
| |
| ca->can_split = 1; |
| |
| if (fndecl) |
| fname = IDENTIFIER_POINTER (DECL_NAME (fndecl)); |
| else if (libname) |
| fname = XSTR (libname, 0); |
| else |
| fname = NULL; |
| |
| if (fname && msp430_special_register_convention_p (fname)) |
| ca->special_p = 1; |
| } |
| |
| /* Helper function for argument passing; this function is the common |
| code that determines where an argument will be passed. */ |
| static void |
| msp430_evaluate_arg (cumulative_args_t cap, |
| machine_mode mode, |
| const_tree type ATTRIBUTE_UNUSED, |
| bool named) |
| { |
| CUMULATIVE_ARGS *ca = get_cumulative_args (cap); |
| int nregs = GET_MODE_SIZE (mode); |
| int i; |
| |
| ca->reg_count = 0; |
| ca->mem_count = 0; |
| |
| if (!named) |
| return; |
| |
| if (mode == PSImode) |
| nregs = 1; |
| else |
| nregs = (nregs + 1) / 2; |
| |
| if (ca->special_p) |
| { |
| /* Function is passed two DImode operands, in R8:R11 and |
| R12:15. */ |
| ca->start_reg = 8; |
| ca->reg_count = 4; |
| return; |
| } |
| |
| switch (nregs) |
| { |
| case 1: |
| for (i = 0; i < 4; i++) |
| if (! ca->reg_used [i]) |
| { |
| ca->reg_count = 1; |
| ca->start_reg = CA_FIRST_REG + i; |
| return; |
| } |
| break; |
| case 2: |
| for (i = 0; i < 3; i++) |
| if (! ca->reg_used [i] && ! ca->reg_used [i + 1]) |
| { |
| ca->reg_count = 2; |
| ca->start_reg = CA_FIRST_REG + i; |
| return; |
| } |
| if (! ca->reg_used [3] && ca->can_split) |
| { |
| ca->reg_count = 1; |
| ca->mem_count = 2; |
| ca->start_reg = CA_FIRST_REG + 3; |
| return; |
| } |
| break; |
| case 3: |
| case 4: |
| ca->can_split = 0; |
| if (! ca->reg_used [0] |
| && ! ca->reg_used [1] |
| && ! ca->reg_used [2] |
| && ! ca->reg_used [3]) |
| { |
| ca->reg_count = 4; |
| ca->start_reg = CA_FIRST_REG; |
| return; |
| } |
| break; |
| } |
| } |
| |
| #undef TARGET_PROMOTE_PROTOTYPES |
| #define TARGET_PROMOTE_PROTOTYPES msp430_promote_prototypes |
| |
| bool |
| msp430_promote_prototypes (const_tree fntype ATTRIBUTE_UNUSED) |
| { |
| return false; |
| } |
| |
| #undef TARGET_FUNCTION_ARG |
| #define TARGET_FUNCTION_ARG msp430_function_arg |
| |
| rtx |
| msp430_function_arg (cumulative_args_t cap, |
| machine_mode mode, |
| const_tree type, |
| bool named) |
| { |
| CUMULATIVE_ARGS *ca = get_cumulative_args (cap); |
| |
| msp430_evaluate_arg (cap, mode, type, named); |
| |
| if (ca->reg_count) |
| return gen_rtx_REG (mode, ca->start_reg); |
| |
| return 0; |
| } |
| |
| #undef TARGET_ARG_PARTIAL_BYTES |
| #define TARGET_ARG_PARTIAL_BYTES msp430_arg_partial_bytes |
| |
| int |
| msp430_arg_partial_bytes (cumulative_args_t cap, |
| machine_mode mode, |
| tree type, |
| bool named) |
| { |
| CUMULATIVE_ARGS *ca = get_cumulative_args (cap); |
| |
| msp430_evaluate_arg (cap, mode, type, named); |
| |
| if (ca->reg_count && ca->mem_count) |
| return ca->reg_count * UNITS_PER_WORD; |
| |
| return 0; |
| } |
| |
| #undef TARGET_PASS_BY_REFERENCE |
| #define TARGET_PASS_BY_REFERENCE msp430_pass_by_reference |
| |
| static bool |
| msp430_pass_by_reference (cumulative_args_t cap ATTRIBUTE_UNUSED, |
| machine_mode mode, |
| const_tree type, |
| bool named ATTRIBUTE_UNUSED) |
| { |
| return (mode == BLKmode |
| || (type && TREE_CODE (type) == RECORD_TYPE) |
| || (type && TREE_CODE (type) == UNION_TYPE)); |
| } |
| |
| #undef TARGET_CALLEE_COPIES |
| #define TARGET_CALLEE_COPIES msp430_callee_copies |
| |
| static bool |
| msp430_callee_copies (cumulative_args_t cap ATTRIBUTE_UNUSED, |
| machine_mode mode ATTRIBUTE_UNUSED, |
| const_tree type ATTRIBUTE_UNUSED, |
| bool named ATTRIBUTE_UNUSED) |
| { |
| return true; |
| } |
| |
| #undef TARGET_FUNCTION_ARG_ADVANCE |
| #define TARGET_FUNCTION_ARG_ADVANCE msp430_function_arg_advance |
| |
| void |
| msp430_function_arg_advance (cumulative_args_t cap, |
| machine_mode mode, |
| const_tree type, |
| bool named) |
| { |
| CUMULATIVE_ARGS *ca = get_cumulative_args (cap); |
| int i; |
| |
| msp430_evaluate_arg (cap, mode, type, named); |
| |
| if (ca->start_reg >= CA_FIRST_REG) |
| for (i = 0; i < ca->reg_count; i ++) |
| ca->reg_used [i + ca->start_reg - CA_FIRST_REG] = 1; |
| |
| ca->special_p = 0; |
| } |
| |
| #undef TARGET_FUNCTION_ARG_BOUNDARY |
| #define TARGET_FUNCTION_ARG_BOUNDARY msp430_function_arg_boundary |
| |
| static unsigned int |
| msp430_function_arg_boundary (machine_mode mode, const_tree type) |
| { |
| if (mode == BLKmode |
| && int_size_in_bytes (type) > 1) |
| return 16; |
| if (GET_MODE_BITSIZE (mode) > 8) |
| return 16; |
| return 8; |
| } |
| |
| #undef TARGET_RETURN_IN_MEMORY |
| #define TARGET_RETURN_IN_MEMORY msp430_return_in_memory |
| |
| static bool |
| msp430_return_in_memory (const_tree ret_type, const_tree fntype ATTRIBUTE_UNUSED) |
| { |
| machine_mode mode = TYPE_MODE (ret_type); |
| |
| if (mode == BLKmode |
| || (fntype && TREE_CODE (TREE_TYPE (fntype)) == RECORD_TYPE) |
| || (fntype && TREE_CODE (TREE_TYPE (fntype)) == UNION_TYPE)) |
| return true; |
| |
| if (GET_MODE_SIZE (mode) > 8) |
| return true; |
| |
| return false; |
| } |
| |
| #undef TARGET_GET_RAW_ARG_MODE |
| #define TARGET_GET_RAW_ARG_MODE msp430_get_raw_arg_mode |
| |
| static fixed_size_mode |
| msp430_get_raw_arg_mode (int regno) |
| { |
| return as_a <fixed_size_mode> (regno == ARG_POINTER_REGNUM |
| ? VOIDmode : Pmode); |
| } |
| |
| #undef TARGET_GET_RAW_RESULT_MODE |
| #define TARGET_GET_RAW_RESULT_MODE msp430_get_raw_result_mode |
| |
| static fixed_size_mode |
| msp430_get_raw_result_mode (int regno ATTRIBUTE_UNUSED) |
| { |
| return Pmode; |
| } |
| |
| #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
| #define TARGET_GIMPLIFY_VA_ARG_EXPR msp430_gimplify_va_arg_expr |
| |
| #include "gimplify.h" |
| |
| static tree |
| msp430_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
| gimple_seq *post_p) |
| { |
| tree addr, t, type_size, rounded_size, valist_tmp; |
| unsigned HOST_WIDE_INT align, boundary; |
| bool indirect; |
| |
| indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); |
| if (indirect) |
| type = build_pointer_type (type); |
| |
| align = PARM_BOUNDARY / BITS_PER_UNIT; |
| boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type); |
| |
| /* When we align parameter on stack for caller, if the parameter |
| alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be |
| aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee |
| here with caller. */ |
| if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT) |
| boundary = MAX_SUPPORTED_STACK_ALIGNMENT; |
| |
| boundary /= BITS_PER_UNIT; |
| |
| /* Hoist the valist value into a temporary for the moment. */ |
| valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL); |
| |
| /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually |
| requires greater alignment, we must perform dynamic alignment. */ |
| if (boundary > align |
| && !integer_zerop (TYPE_SIZE (type))) |
| { |
| /* FIXME: This is where this function diverts from targhooks.c: |
| std_gimplify_va_arg_expr(). It works, but I do not know why... */ |
| if (! POINTER_TYPE_P (type)) |
| { |
| t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, |
| fold_build_pointer_plus_hwi (valist_tmp, boundary - 1)); |
| gimplify_and_add (t, pre_p); |
| |
| t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp, |
| fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist), |
| valist_tmp, |
| build_int_cst (TREE_TYPE (valist), -boundary))); |
| gimplify_and_add (t, pre_p); |
| } |
| } |
| else |
| boundary = align; |
| |
| /* If the actual alignment is less than the alignment of the type, |
| adjust the type accordingly so that we don't assume strict alignment |
| when dereferencing the pointer. */ |
| boundary *= BITS_PER_UNIT; |
| if (boundary < TYPE_ALIGN (type)) |
| { |
| type = build_variant_type_copy (type); |
| SET_TYPE_ALIGN (type, boundary); |
| } |
| |
| /* Compute the rounded size of the type. */ |
| type_size = size_in_bytes (type); |
| rounded_size = round_up (type_size, align); |
| |
| /* Reduce rounded_size so it's sharable with the postqueue. */ |
| gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue); |
| |
| /* Get AP. */ |
| addr = valist_tmp; |
| |
| /* Compute new value for AP. */ |
| t = fold_build_pointer_plus (valist_tmp, rounded_size); |
| t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t); |
| gimplify_and_add (t, pre_p); |
| |
| addr = fold_convert (build_pointer_type (type), addr); |
| |
| if (indirect) |
| addr = build_va_arg_indirect_ref (addr); |
| |
| addr = build_va_arg_indirect_ref (addr); |
| |
| return addr; |
| } |
| |
| #undef TARGET_LRA_P |
| #define TARGET_LRA_P hook_bool_void_false |
| |
| /* Addressing Modes */ |
| |
| #undef TARGET_LEGITIMATE_ADDRESS_P |
| #define TARGET_LEGITIMATE_ADDRESS_P msp430_legitimate_address_p |
| |
| static bool |
| reg_ok_for_addr (rtx r, bool strict) |
| { |
| int rn = REGNO (r); |
| |
| if (strict && rn >= FIRST_PSEUDO_REGISTER) |
| rn = reg_renumber [rn]; |
| if (strict && 0 <= rn && rn < FIRST_PSEUDO_REGISTER) |
| return true; |
| if (!strict) |
| return true; |
| return false; |
| } |
| |
| bool |
| msp430_legitimate_address_p (machine_mode mode ATTRIBUTE_UNUSED, |
| rtx x ATTRIBUTE_UNUSED, |
| bool strict ATTRIBUTE_UNUSED) |
| { |
| switch (GET_CODE (x)) |
| { |
| case MEM: |
| return false; |
| |
| case PLUS: |
| if (REG_P (XEXP (x, 0))) |
| { |
| if (GET_MODE (x) != GET_MODE (XEXP (x, 0))) |
| return false; |
| if (!reg_ok_for_addr (XEXP (x, 0), strict)) |
| return false; |
| switch (GET_CODE (XEXP (x, 1))) |
| { |
| case CONST: |
| case SYMBOL_REF: |
| case CONST_INT: |
| return true; |
| default: |
| return false; |
| } |
| } |
| return false; |
| |
| case REG: |
| if (!reg_ok_for_addr (x, strict)) |
| return false; |
| /* FALLTHRU */ |
| case CONST: |
| case SYMBOL_REF: |
| case CONST_INT: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| #undef TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P |
| #define TARGET_ADDR_SPACE_LEGITIMATE_ADDRESS_P msp430_addr_space_legitimate_address_p |
| |
| bool |
| msp430_addr_space_legitimate_address_p (machine_mode mode, |
| rtx x, |
| bool strict, |
| addr_space_t as ATTRIBUTE_UNUSED) |
| { |
| return msp430_legitimate_address_p (mode, x, strict); |
| } |
| |
| #undef TARGET_ASM_INTEGER |
| #define TARGET_ASM_INTEGER msp430_asm_integer |
| static bool |
| msp430_asm_integer (rtx x, unsigned int size, int aligned_p) |
| { |
| int c = GET_CODE (x); |
| |
| if (size == 3 && GET_MODE (x) == PSImode) |
| size = 4; |
| |
| switch (size) |
| { |
| case 4: |
| if (c == SYMBOL_REF || c == CONST || c == LABEL_REF || c == CONST_INT |
| || c == PLUS || c == MINUS) |
| { |
| fprintf (asm_out_file, "\t.long\t"); |
| output_addr_const (asm_out_file, x); |
| fputc ('\n', asm_out_file); |
| return true; |
| } |
| break; |
| } |
| return default_assemble_integer (x, size, aligned_p); |
| } |
| |
| #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
| #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA msp430_asm_output_addr_const_extra |
| static bool |
| msp430_asm_output_addr_const_extra (FILE *file ATTRIBUTE_UNUSED, rtx x) |
| { |
| debug_rtx(x); |
| return false; |
| } |
| |
| #undef TARGET_LEGITIMATE_CONSTANT_P |
| #define TARGET_LEGITIMATE_CONSTANT_P msp430_legitimate_constant |
| |
| static bool |
| msp430_legitimate_constant (machine_mode mode, rtx x) |
| { |
| return ! CONST_INT_P (x) |
| || mode != PSImode |
| /* GCC does not know the width of the PSImode, so make |
| sure that it does not try to use a constant value that |
| is out of range. */ |
| || (INTVAL (x) < (1 << 20) && INTVAL (x) >= (HOST_WIDE_INT)(HOST_WIDE_INT_M1U << 20)); |
| } |
| |
| |
| #undef TARGET_RTX_COSTS |
| #define TARGET_RTX_COSTS msp430_rtx_costs |
| |
| static bool msp430_rtx_costs (rtx x ATTRIBUTE_UNUSED, |
| machine_mode mode, |
| int outer_code ATTRIBUTE_UNUSED, |
| int opno ATTRIBUTE_UNUSED, |
| int * total, |
| bool speed ATTRIBUTE_UNUSED) |
| { |
| int code = GET_CODE (x); |
| |
| switch (code) |
| { |
| case SIGN_EXTEND: |
| if (mode == SImode && outer_code == SET) |
| { |
| *total = COSTS_N_INSNS (4); |
| return true; |
| } |
| break; |
| case ASHIFT: |
| case ASHIFTRT: |
| case LSHIFTRT: |
| if (!msp430x) |
| { |
| *total = COSTS_N_INSNS (100); |
| return true; |
| } |
| break; |
| } |
| return false; |
| } |
| |
| /* Function Entry and Exit */ |
| |
| /* The MSP430 call frame looks like this: |
| |
| <higher addresses> |
| +--------------------+ |
| | | |
| | Stack Arguments | |
| | | |
| +--------------------+ <-- "arg pointer" |
| | | |
| | PC from call | (2 bytes for 430, 4 for TARGET_LARGE) |
| | | |
| +--------------------+ |
| | SR if this func has| |
| | been called via an | |
| | interrupt. | |
| +--------------------+ <-- SP before prologue, also AP |
| | | |
| | Saved Regs | (2 bytes per reg for 430, 4 per for TARGET_LARGE) |
| | | |
| +--------------------+ <-- "frame pointer" |
| | | |
| | Locals | |
| | | |
| +--------------------+ |
| | | |
| | Outgoing Args | |
| | | |
| +--------------------+ <-- SP during function |
| <lower addresses> |
| |
| */ |
| |
| /* We use this to wrap all emitted insns in the prologue, so they get |
| the "frame-related" (/f) flag set. */ |
| static rtx |
| F (rtx x) |
| { |
| RTX_FRAME_RELATED_P (x) = 1; |
| return x; |
| } |
| |
| /* This is the one spot that decides if a register is to be saved and |
| restored in the prologue/epilogue. */ |
| static bool |
| msp430_preserve_reg_p (int regno) |
| { |
| /* PC, SP, SR, and the constant generator. */ |
| if (regno <= 3) |
| return false; |
| |
| /* FIXME: add interrupt, EH, etc. */ |
| if (crtl->calls_eh_return) |
| return true; |
| |
| /* Shouldn't be more than the above, but just in case... */ |
| if (fixed_regs [regno]) |
| return false; |
| |
| /* Interrupt handlers save all registers they use, even |
| ones which are call saved. If they call other functions |
| then *every* register is saved. */ |
| if (msp430_is_interrupt_func ()) |
| return ! crtl->is_leaf || df_regs_ever_live_p (regno); |
| |
| if (!call_used_regs [regno] |
| && df_regs_ever_live_p (regno)) |
| return true; |
| |
| return false; |
| } |
| |
| /* Compute all the frame-related fields in our machine_function |
| structure. */ |
| static void |
| msp430_compute_frame_info (void) |
| { |
| int i; |
| |
| cfun->machine->computed = 1; |
| cfun->machine->framesize_regs = 0; |
| cfun->machine->framesize_locals = get_frame_size (); |
| cfun->machine->framesize_outgoing = crtl->outgoing_args_size; |
| |
| for (i = 0; i < ARG_POINTER_REGNUM; i ++) |
| if (msp430_preserve_reg_p (i)) |
| { |
| cfun->machine->need_to_save [i] = 1; |
| cfun->machine->framesize_regs += (TARGET_LARGE ? 4 : 2); |
| } |
| else |
| cfun->machine->need_to_save [i] = 0; |
| |
| if ((cfun->machine->framesize_locals + cfun->machine->framesize_outgoing) & 1) |
| cfun->machine->framesize_locals ++; |
| |
| cfun->machine->framesize = (cfun->machine->framesize_regs |
| + cfun->machine->framesize_locals |
| + cfun->machine->framesize_outgoing); |
| } |
| |
| /* Attribute Handling. */ |
| |
| const char * const ATTR_INTR = "interrupt"; |
| const char * const ATTR_WAKEUP = "wakeup"; |
| const char * const ATTR_NAKED = "naked"; |
| const char * const ATTR_REENT = "reentrant"; |
| const char * const ATTR_CRIT = "critical"; |
| const char * const ATTR_LOWER = "lower"; |
| const char * const ATTR_UPPER = "upper"; |
| const char * const ATTR_EITHER = "either"; |
| const char * const ATTR_NOINIT = "noinit"; |
| const char * const ATTR_PERSIST = "persistent"; |
| |
| static inline bool |
| has_attr (const char * attr, tree decl) |
| { |
| if (decl == NULL_TREE) |
| return false; |
| return lookup_attribute (attr, DECL_ATTRIBUTES (decl)) != NULL_TREE; |
| } |
| |
| static bool |
| is_interrupt_func (tree decl = current_function_decl) |
| { |
| return has_attr (ATTR_INTR, decl); |
| } |
| |
| /* Returns true if the current function has the "interrupt" attribute. */ |
| |
| bool |
| msp430_is_interrupt_func (void) |
| { |
| return is_interrupt_func (current_function_decl); |
| } |
| |
| static bool |
| is_wakeup_func (tree decl = current_function_decl) |
| { |
| return is_interrupt_func (decl) && has_attr (ATTR_WAKEUP, decl); |
| } |
| |
| static inline bool |
| is_naked_func (tree decl = current_function_decl) |
| { |
| return has_attr (ATTR_NAKED, decl); |
| } |
| |
| static inline bool |
| is_reentrant_func (tree decl = current_function_decl) |
| { |
| return has_attr (ATTR_REENT, decl); |
| } |
| |
| static inline bool |
| is_critical_func (tree decl = current_function_decl) |
| { |
| return has_attr (ATTR_CRIT, decl); |
| } |
| |
| static bool |
| has_section_name (const char * name, tree decl = current_function_decl) |
| { |
| if (decl == NULL_TREE) |
| return false; |
| return (DECL_SECTION_NAME (decl) |
| && (strcmp (name, DECL_SECTION_NAME (decl)) == 0)); |
| } |
| |
| #undef TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS |
| #define TARGET_ALLOCATE_STACK_SLOTS_FOR_ARGS msp430_allocate_stack_slots_for_args |
| |
| static bool |
| msp430_allocate_stack_slots_for_args (void) |
| { |
| /* Naked functions should not allocate stack slots for arguments. */ |
| return ! is_naked_func (); |
| } |
| |
| /* Verify MSP430 specific attributes. */ |
| #define TREE_NAME_EQ(NAME, STR) (strcmp (IDENTIFIER_POINTER (NAME), (STR)) == 0) |
| |
| static tree |
| msp430_attr (tree * node, |
| tree name, |
| tree args, |
| int flags ATTRIBUTE_UNUSED, |
| bool * no_add_attrs) |
| { |
| gcc_assert (DECL_P (* node)); |
| |
| if (args != NULL) |
| { |
| /* Only the interrupt attribute takes an argument. */ |
| gcc_assert (TREE_NAME_EQ (name, ATTR_INTR)); |
| |
| tree value = TREE_VALUE (args); |
| |
| switch (TREE_CODE (value)) |
| { |
| case STRING_CST: |
| if ( strcmp (TREE_STRING_POINTER (value), "reset") |
| && strcmp (TREE_STRING_POINTER (value), "nmi") |
| && strcmp (TREE_STRING_POINTER (value), "watchdog")) |
| /* Allow the attribute to be added - the linker script |
| being used may still recognise this name. */ |
| warning (OPT_Wattributes, |
| "unrecognized interrupt vector argument of %qE attribute", |
| name); |
| break; |
| |
| case INTEGER_CST: |
| if (wi::gtu_p (wi::to_wide (value), 63)) |
| /* Allow the attribute to be added - the linker script |
| being used may still recognise this value. */ |
| warning (OPT_Wattributes, |
| "numeric argument of %qE attribute must be in range 0..63", |
| name); |
| break; |
| |
| default: |
| warning (OPT_Wattributes, |
| "argument of %qE attribute is not a string constant or number", |
| name); |
| *no_add_attrs = true; |
| break; |
| } |
| } |
| |
| const char * message = NULL; |
| |
| if (TREE_CODE (* node) != FUNCTION_DECL) |
| { |
| message = "%qE attribute only applies to functions"; |
| } |
| else if (TREE_NAME_EQ (name, ATTR_INTR)) |
| { |
| if (TREE_CODE (TREE_TYPE (* node)) == FUNCTION_TYPE |
| && ! VOID_TYPE_P (TREE_TYPE (TREE_TYPE (* node)))) |
| message = "interrupt handlers must be void"; |
| |
| if (! TREE_PUBLIC (* node)) |
| message = "interrupt handlers cannot be static"; |
| |
| /* Ensure interrupt handlers never get optimised out. */ |
| TREE_USED (* node) = 1; |
| DECL_PRESERVE_P (* node) = 1; |
| } |
| else if (TREE_NAME_EQ (name, ATTR_REENT)) |
| { |
| if (is_naked_func (* node)) |
| message = "naked functions cannot be reentrant"; |
| else if (is_critical_func (* node)) |
| message = "critical functions cannot be reentrant"; |
| } |
| else if (TREE_NAME_EQ (name, ATTR_CRIT)) |
| { |
| if (is_naked_func (* node)) |
| message = "naked functions cannot be critical"; |
| else if (is_reentrant_func (* node)) |
| message = "reentrant functions cannot be critical"; |
| } |
| else if (TREE_NAME_EQ (name, ATTR_NAKED)) |
| { |
| if (is_critical_func (* node)) |
| message = "critical functions cannot be naked"; |
| else if (is_reentrant_func (* node)) |
| message = "reentrant functions cannot be naked"; |
| } |
| |
| if (message) |
| { |
| warning (OPT_Wattributes, message, name); |
| * no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| static tree |
| msp430_section_attr (tree * node, |
| tree name, |
| tree args, |
| int flags ATTRIBUTE_UNUSED, |
| bool * no_add_attrs ATTRIBUTE_UNUSED) |
| { |
| gcc_assert (DECL_P (* node)); |
| gcc_assert (args == NULL); |
| |
| const char * message = NULL; |
| |
| if (TREE_NAME_EQ (name, ATTR_UPPER)) |
| { |
| if (has_attr (ATTR_LOWER, * node)) |
| message = "already marked with 'lower' attribute"; |
| else if (has_attr (ATTR_EITHER, * node)) |
| message = "already marked with 'either' attribute"; |
| else if (! msp430x) |
| message = "upper attribute needs a 430X cpu"; |
| } |
| else if (TREE_NAME_EQ (name, ATTR_LOWER)) |
| { |
| if (has_attr (ATTR_UPPER, * node)) |
| message = "already marked with 'upper' attribute"; |
| else if (has_attr (ATTR_EITHER, * node)) |
| message = "already marked with 'either' attribute"; |
| } |
| else |
| { |
| gcc_assert (TREE_NAME_EQ (name, ATTR_EITHER)); |
| |
| if (has_attr (ATTR_LOWER, * node)) |
| message = "already marked with 'lower' attribute"; |
| else if (has_attr (ATTR_UPPER, * node)) |
| message = "already marked with 'upper' attribute"; |
| } |
| |
| if (message) |
| { |
| warning (OPT_Wattributes, message, name); |
| * no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| static tree |
| msp430_data_attr (tree * node, |
| tree name, |
| tree args, |
| int flags ATTRIBUTE_UNUSED, |
| bool * no_add_attrs ATTRIBUTE_UNUSED) |
| { |
| const char * message = NULL; |
| |
| gcc_assert (DECL_P (* node)); |
| gcc_assert (args == NULL); |
| |
| if (TREE_CODE (* node) != VAR_DECL) |
| message = G_("%qE attribute only applies to variables"); |
| |
| /* Check that it's possible for the variable to have a section. */ |
| if ((TREE_STATIC (* node) || DECL_EXTERNAL (* node) || in_lto_p) |
| && DECL_SECTION_NAME (* node)) |
| message = G_("%qE attribute cannot be applied to variables with specific sections"); |
| |
| if (!message && TREE_NAME_EQ (name, ATTR_PERSIST) && !TREE_STATIC (* node) |
| && !TREE_PUBLIC (* node) && !DECL_EXTERNAL (* node)) |
| message = G_("%qE attribute has no effect on automatic variables"); |
| |
| /* It's not clear if there is anything that can be set here to prevent the |
| front end placing the variable before the back end can handle it, in a |
| similar way to how DECL_COMMON is used below. |
| So just place the variable in the .persistent section now. */ |
| if ((TREE_STATIC (* node) || DECL_EXTERNAL (* node) || in_lto_p) |
| && TREE_NAME_EQ (name, ATTR_PERSIST)) |
| set_decl_section_name (* node, ".persistent"); |
| |
| /* If this var is thought to be common, then change this. Common variables |
| are assigned to sections before the backend has a chance to process them. */ |
| if (DECL_COMMON (* node)) |
| DECL_COMMON (* node) = 0; |
| |
| if (message) |
| { |
| warning (OPT_Wattributes, message, name); |
| * no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| |
| #undef TARGET_ATTRIBUTE_TABLE |
| #define TARGET_ATTRIBUTE_TABLE msp430_attribute_table |
| |
| /* Table of MSP430-specific attributes. */ |
| const struct attribute_spec msp430_attribute_table[] = |
| { |
| /* Name min_num_args type_req, affects_type_identity |
| max_num_args, fn_type_req exclusions |
| decl_req handler. */ |
| { ATTR_INTR, 0, 1, true, false, false, msp430_attr, false, NULL }, |
| { ATTR_NAKED, 0, 0, true, false, false, msp430_attr, false, NULL }, |
| { ATTR_REENT, 0, 0, true, false, false, msp430_attr, false, NULL }, |
| { ATTR_CRIT, 0, 0, true, false, false, msp430_attr, false, NULL }, |
| { ATTR_WAKEUP, 0, 0, true, false, false, msp430_attr, false, NULL }, |
| |
| { ATTR_LOWER, 0, 0, true, false, false, msp430_section_attr, false, |
| NULL }, |
| { ATTR_UPPER, 0, 0, true, false, false, msp430_section_attr, false, |
| NULL }, |
| { ATTR_EITHER, 0, 0, true, false, false, msp430_section_attr, false, |
| NULL }, |
| |
| { ATTR_NOINIT, 0, 0, true, false, false, msp430_data_attr, false, |
| NULL }, |
| { ATTR_PERSIST, 0, 0, true, false, false, msp430_data_attr, false, |
| NULL }, |
| |
| { NULL, 0, 0, false, false, false, NULL, false, NULL } |
| }; |
| |
| #undef TARGET_ASM_FUNCTION_PROLOGUE |
| #define TARGET_ASM_FUNCTION_PROLOGUE msp430_start_function |
| |
| static void |
| msp430_start_function (FILE *outfile) |
| { |
| int r, n; |
| |
| fprintf (outfile, "; start of function\n"); |
| |
| if (DECL_ATTRIBUTES (current_function_decl) != NULL_TREE) |
| { |
| fprintf (outfile, "; attributes: "); |
| if (is_naked_func ()) |
| fprintf (outfile, "naked "); |
| if (msp430_is_interrupt_func ()) |
| fprintf (outfile, "interrupt "); |
| if (is_reentrant_func ()) |
| fprintf (outfile, "reentrant "); |
| if (is_critical_func ()) |
| fprintf (outfile, "critical "); |
| if (is_wakeup_func ()) |
| fprintf (outfile, "wakeup "); |
| fprintf (outfile, "\n"); |
| } |
| |
| fprintf (outfile, "; framesize_regs: %d\n", cfun->machine->framesize_regs); |
| fprintf (outfile, "; framesize_locals: %d\n", cfun->machine->framesize_locals); |
| fprintf (outfile, "; framesize_outgoing: %d\n", cfun->machine->framesize_outgoing); |
| fprintf (outfile, "; framesize: %d\n", cfun->machine->framesize); |
| fprintf (outfile, "; elim ap -> fp %d\n", msp430_initial_elimination_offset (ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM)); |
| fprintf (outfile, "; elim fp -> sp %d\n", msp430_initial_elimination_offset (FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM)); |
| |
| n = 0; |
| fprintf (outfile, "; saved regs:"); |
| for (r = 0; r < ARG_POINTER_REGNUM; r++) |
| if (cfun->machine->need_to_save [r]) |
| { |
| fprintf (outfile, " %s", reg_names [r]); |
| n = 1; |
| } |
| if (n == 0) |
| fprintf (outfile, "(none)"); |
| fprintf (outfile, "\n"); |
| } |
| |
| /* Common code to change the stack pointer. */ |
| static void |
| increment_stack (HOST_WIDE_INT amount) |
| { |
| rtx inc; |
| rtx sp = stack_pointer_rtx; |
| |
| if (amount == 0) |
| return; |
| |
| if (amount < 0) |
| { |
| inc = GEN_INT (- amount); |
| if (TARGET_LARGE) |
| F (emit_insn (gen_subpsi3 (sp, sp, inc))); |
| else |
| F (emit_insn (gen_subhi3 (sp, sp, inc))); |
| } |
| else |
| { |
| inc = GEN_INT (amount); |
| if (TARGET_LARGE) |
| emit_insn (gen_addpsi3 (sp, sp, inc)); |
| else |
| emit_insn (gen_addhi3 (sp, sp, inc)); |
| } |
| } |
| |
| void |
| msp430_start_function (FILE *file, const char *name, tree decl) |
| { |
| tree int_attr; |
| |
| int_attr = lookup_attribute ("interrupt", DECL_ATTRIBUTES (decl)); |
| if (int_attr != NULL_TREE) |
| { |
| tree intr_vector = TREE_VALUE (int_attr); |
| |
| if (intr_vector != NULL_TREE) |
| { |
| char buf[101]; |
| |
| /* Interrupt vector sections should be unique, but use of weak |
| functions implies multiple definitions. */ |
| if (DECL_WEAK (decl)) |
| { |
| error ("argument to interrupt attribute is unsupported for weak functions"); |
| } |
| |
| intr_vector = TREE_VALUE (intr_vector); |
| |
| /* The interrupt attribute has a vector value. Turn this into a |
| section name, switch to that section and put the address of |
| the current function into that vector slot. Note msp430_attr() |
| has already verified the vector name for us. */ |
| if (TREE_CODE (intr_vector) == STRING_CST) |
| sprintf (buf, "__interrupt_vector_%.80s", |
| TREE_STRING_POINTER (intr_vector)); |
| else /* TREE_CODE (intr_vector) == INTEGER_CST */ |
| sprintf (buf, "__interrupt_vector_%u", |
| (unsigned int) TREE_INT_CST_LOW (intr_vector)); |
| |
| switch_to_section (get_section (buf, SECTION_CODE, decl)); |
| fputs ("\t.word\t", file); |
| assemble_name (file, name); |
| fputc ('\n', file); |
| fputc ('\t', file); |
| } |
| } |
| |
| switch_to_section (function_section (decl)); |
| ASM_OUTPUT_TYPE_DIRECTIVE(file, name, "function"); |
| ASM_OUTPUT_FUNCTION_LABEL (file, name, decl); |
| } |
| |
| static const char * const lower_prefix = ".lower"; |
| static const char * const upper_prefix = ".upper"; |
| static const char * const either_prefix = ".either"; |
| |
| /* Generate a prefix for a section name, based upon |
| the region into which the object should be placed. */ |
| |
| static const char * |
| gen_prefix (tree decl) |
| { |
| if (DECL_ONE_ONLY (decl)) |
| return NULL; |
| |
| /* If the user has specified a particular section then do not use any prefix. */ |
| if (has_attr ("section", decl)) |
| return NULL; |
| |
| /* If the function has been put in the .lowtext section (because it is an |
| interrupt handler, and the large memory model is used), then do not add |
| any prefixes. */ |
| if (has_section_name (".lowtext", decl)) |
| return NULL; |
| |
| /* If the object has __attribute__((lower)) then use the ".lower." prefix. */ |
| if (has_attr (ATTR_LOWER, decl)) |
| return lower_prefix; |
| |
| /* If we are compiling for the MSP430 then we do not support the upper region. */ |
| if (! msp430x) |
| return NULL; |
| |
| if (has_attr (ATTR_UPPER, decl)) |
| return upper_prefix; |
| |
| if (has_attr (ATTR_EITHER, decl)) |
| return either_prefix; |
| |
| if (TREE_CODE (decl) == FUNCTION_DECL) |
| { |
| if (msp430_code_region == MSP430_REGION_LOWER) |
| return lower_prefix; |
| |
| if (msp430_code_region == MSP430_REGION_UPPER) |
| return upper_prefix; |
| |
| if (msp430_code_region == MSP430_REGION_EITHER) |
| return either_prefix; |
| } |
| else |
| { |
| if (msp430_data_region == MSP430_REGION_LOWER) |
| return lower_prefix; |
| |
| if (msp430_data_region == MSP430_REGION_UPPER) |
| return upper_prefix; |
| |
| if (msp430_data_region == MSP430_REGION_EITHER) |
| return either_prefix; |
| } |
| |
| return NULL; |
| } |
| |
| static section * noinit_section; |
| static section * persist_section; |
| |
| #undef TARGET_ASM_INIT_SECTIONS |
| #define TARGET_ASM_INIT_SECTIONS msp430_init_sections |
| |
| static void |
| msp430_init_sections (void) |
| { |
| noinit_section = get_unnamed_section (0, output_section_asm_op, ".section .noinit,\"aw\""); |
| persist_section = get_unnamed_section (0, output_section_asm_op, ".section .persistent,\"aw\""); |
| } |
| |
| #undef TARGET_ASM_SELECT_SECTION |
| #define TARGET_ASM_SELECT_SECTION msp430_select_section |
| |
| static section * |
| msp430_select_section (tree decl, int reloc, unsigned HOST_WIDE_INT align) |
| { |
| gcc_assert (decl != NULL_TREE); |
| |
| if (TREE_CODE (decl) == STRING_CST |
| || TREE_CODE (decl) == CONSTRUCTOR |
| || TREE_CODE (decl) == INTEGER_CST |
| || TREE_CODE (decl) == VECTOR_CST |
| || TREE_CODE (decl) == COMPLEX_CST) |
| return default_select_section (decl, reloc, align); |
| |
| /* In large mode we must make sure that interrupt handlers are put into |
| low memory as the vector table only accepts 16-bit addresses. */ |
| if (TARGET_LARGE && TREE_CODE (decl) == FUNCTION_DECL && is_interrupt_func (decl)) |
| return get_section (".lowtext", SECTION_CODE | SECTION_WRITE , decl); |
| |
| const char * prefix = gen_prefix (decl); |
| if (prefix == NULL) |
| { |
| if (TREE_CODE (decl) == FUNCTION_DECL) |
| return text_section; |
| else if (has_attr (ATTR_NOINIT, decl)) |
| return noinit_section; |
| else if (has_attr (ATTR_PERSIST, decl)) |
| return persist_section; |
| else |
| return default_select_section (decl, reloc, align); |
| } |
| |
| const char * sec; |
| switch (categorize_decl_for_section (decl, reloc)) |
| { |
| case SECCAT_TEXT: sec = ".text"; break; |
| case SECCAT_DATA: sec = ".data"; break; |
| case SECCAT_BSS: sec = ".bss"; break; |
| case SECCAT_RODATA: sec = ".rodata"; break; |
| |
| case SECCAT_RODATA_MERGE_STR: |
| case SECCAT_RODATA_MERGE_STR_INIT: |
| case SECCAT_RODATA_MERGE_CONST: |
| case SECCAT_SRODATA: |
| case SECCAT_DATA_REL: |
| case SECCAT_DATA_REL_LOCAL: |
| case SECCAT_DATA_REL_RO: |
| case SECCAT_DATA_REL_RO_LOCAL: |
| case SECCAT_SDATA: |
| case SECCAT_SBSS: |
| case SECCAT_TDATA: |
| case SECCAT_TBSS: |
| return default_select_section (decl, reloc, align); |
| |
| default: |
| gcc_unreachable (); |
| } |
| |
| const char * dec_name = DECL_SECTION_NAME (decl); |
| char * name = ACONCAT ((prefix, sec, dec_name, NULL)); |
| |
| return get_named_section (decl, name, 0); |
| } |
| |
| #undef TARGET_ASM_FUNCTION_SECTION |
| #define TARGET_ASM_FUNCTION_SECTION msp430_function_section |
| |
| static section * |
| msp430_function_section (tree decl, enum node_frequency freq, bool startup, bool exit) |
| { |
| const char * name; |
| |
| gcc_assert (DECL_SECTION_NAME (decl) != NULL); |
| name = DECL_SECTION_NAME (decl); |
| |
| const char * prefix = gen_prefix (decl); |
| if (prefix == NULL |
| || strncmp (name, prefix, strlen (prefix)) == 0) |
| return default_function_section (decl, freq, startup, exit); |
| |
| name = ACONCAT ((prefix, name, NULL)); |
| return get_named_section (decl, name, 0); |
| } |
| |
| #undef TARGET_SECTION_TYPE_FLAGS |
| #define TARGET_SECTION_TYPE_FLAGS msp430_section_type_flags |
| |
| unsigned int |
| msp430_section_type_flags (tree decl, const char * name, int reloc) |
| { |
| if (strncmp (name, lower_prefix, strlen (lower_prefix)) == 0) |
| name += strlen (lower_prefix); |
| else if (strncmp (name, upper_prefix, strlen (upper_prefix)) == 0) |
| name += strlen (upper_prefix); |
| else if (strncmp (name, either_prefix, strlen (either_prefix)) == 0) |
| name += strlen (either_prefix); |
| else if (strcmp (name, ".noinit") == 0) |
| return SECTION_WRITE | SECTION_BSS | SECTION_NOTYPE; |
| else if (strcmp (name, ".persistent") == 0) |
| return SECTION_WRITE | SECTION_NOTYPE; |
| |
| return default_section_type_flags (decl, name, reloc); |
| } |
| |
| #undef TARGET_ASM_UNIQUE_SECTION |
| #define TARGET_ASM_UNIQUE_SECTION msp430_unique_section |
| |
| static void |
| msp430_unique_section (tree decl, int reloc) |
| { |
| gcc_assert (decl != NULL_TREE); |
| |
| /* In large mode we must make sure that interrupt handlers are put into |
| low memory as the vector table only accepts 16-bit addresses. */ |
| if (TARGET_LARGE && TREE_CODE (decl) == FUNCTION_DECL && is_interrupt_func (decl)) |
| { |
| set_decl_section_name (decl, ".lowtext"); |
| return; |
| } |
| |
| default_unique_section (decl, reloc); |
| |
| const char * prefix; |
| |
| if ( TREE_CODE (decl) == STRING_CST |
| || TREE_CODE (decl) == CONSTRUCTOR |
| || TREE_CODE (decl) == INTEGER_CST |
| || TREE_CODE (decl) == VECTOR_CST |
| || TREE_CODE (decl) == COMPLEX_CST |
| || (prefix = gen_prefix (decl)) == NULL |
| ) |
| return; |
| |
| const char * dec_name = DECL_SECTION_NAME (decl); |
| char * name = ACONCAT ((prefix, dec_name, NULL)); |
| |
| set_decl_section_name (decl, name); |
| } |
| |
| /* Emit a declaration of a common symbol. |
| If a data region is in use then put the symbol into the |
| equivalent .bss section instead. */ |
| |
| void |
| msp430_output_aligned_decl_common (FILE * stream, |
| const tree decl, |
| const char * name, |
| unsigned HOST_WIDE_INT size, |
| unsigned int align) |
| { |
| if (msp430_data_region == MSP430_REGION_ANY) |
| { |
| fprintf (stream, COMMON_ASM_OP); |
| assemble_name (stream, name); |
| fprintf (stream, "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", |
| size, align / BITS_PER_UNIT); |
| } |
| else |
| { |
| section * sec; |
| |
| if (decl) |
| sec = msp430_select_section (decl, 0, align); |
| else |
| switch (msp430_data_region) |
| { |
| case MSP430_REGION_UPPER: sec = get_named_section (NULL, ".upper.bss", 0); break; |
| case MSP430_REGION_LOWER: sec = get_named_section (NULL, ".lower.bss", 0); break; |
| case MSP430_REGION_EITHER: sec = get_named_section (NULL, ".either.bss", 0); break; |
| default: |
| gcc_unreachable (); |
| } |
| gcc_assert (sec != NULL); |
| |
| switch_to_section (sec); |
| ASM_OUTPUT_ALIGN (stream, floor_log2 (align / BITS_PER_UNIT)); |
| targetm.asm_out.globalize_label (stream, name); |
| ASM_WEAKEN_LABEL (stream, name); |
| ASM_OUTPUT_LABEL (stream, name); |
| ASM_OUTPUT_SKIP (stream, size ? size : 1); |
| } |
| } |
| |
| bool |
| msp430_do_not_relax_short_jumps (void) |
| { |
| /* When placing code into "either" low or high memory we do not want the linker |
| to grow the size of sections, which it can do if it is encounters a branch to |
| a label that is too far away. So we tell the cbranch patterns to avoid using |
| short jumps when there is a chance that the instructions will end up in a low |
| section. */ |
| return |
| msp430_code_region == MSP430_REGION_EITHER |
| || msp430_code_region == MSP430_REGION_LOWER |
| || has_attr (ATTR_EITHER, current_function_decl) |
| || has_attr (ATTR_LOWER, current_function_decl); |
| } |
| |
| enum msp430_builtin |
| { |
| MSP430_BUILTIN_BIC_SR, |
| MSP430_BUILTIN_BIS_SR, |
| MSP430_BUILTIN_DELAY_CYCLES, |
| MSP430_BUILTIN_max |
| }; |
| |
| static GTY(()) tree msp430_builtins [(int) MSP430_BUILTIN_max]; |
| |
| static void |
| msp430_init_builtins (void) |
| { |
| tree void_ftype_int = build_function_type_list (void_type_node, integer_type_node, NULL); |
| tree void_ftype_longlong = build_function_type_list (void_type_node, long_long_integer_type_node, NULL); |
| |
| msp430_builtins[MSP430_BUILTIN_BIC_SR] = |
| add_builtin_function ( "__bic_SR_register_on_exit", void_ftype_int, |
| MSP430_BUILTIN_BIC_SR, BUILT_IN_MD, NULL, NULL_TREE); |
| |
| msp430_builtins[MSP430_BUILTIN_BIS_SR] = |
| add_builtin_function ( "__bis_SR_register_on_exit", void_ftype_int, |
| MSP430_BUILTIN_BIS_SR, BUILT_IN_MD, NULL, NULL_TREE); |
| |
| msp430_builtins[MSP430_BUILTIN_DELAY_CYCLES] = |
| add_builtin_function ( "__delay_cycles", void_ftype_longlong, |
| MSP430_BUILTIN_DELAY_CYCLES, BUILT_IN_MD, NULL, NULL_TREE); |
| } |
| |
| static tree |
| msp430_builtin_decl (unsigned code, bool initialize ATTRIBUTE_UNUSED) |
| { |
| switch (code) |
| { |
| case MSP430_BUILTIN_BIC_SR: |
| case MSP430_BUILTIN_BIS_SR: |
| case MSP430_BUILTIN_DELAY_CYCLES: |
| return msp430_builtins[code]; |
| default: |
| return error_mark_node; |
| } |
| } |
| |
| /* These constants are really register reads, which are faster than |
| regular constants. */ |
| static int |
| cg_magic_constant (HOST_WIDE_INT c) |
| { |
| switch (c) |
| { |
| case 0xffff: |
| case -1: |
| case 0: |
| case 1: |
| case 2: |
| case 4: |
| case 8: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| static rtx |
| msp430_expand_delay_cycles (rtx arg) |
| { |
| HOST_WIDE_INT i, c, n; |
| /* extra cycles for MSP430X instructions */ |
| #define CYCX(M,X) (msp430x ? (X) : (M)) |
| |
| if (GET_CODE (arg) != CONST_INT) |
| { |
| error ("__delay_cycles() only takes constant arguments"); |
| return NULL_RTX; |
| } |
| |
| c = INTVAL (arg); |
| |
| if (HOST_BITS_PER_WIDE_INT > 32) |
| { |
| if (c < 0) |
| { |
| error ("__delay_cycles only takes non-negative cycle counts"); |
| return NULL_RTX; |
| } |
| } |
| |
| emit_insn (gen_delay_cycles_start (arg)); |
| |
| /* For 32-bit loops, there's 13(16) + 5(min(x,0x10000) + 6x cycles. */ |
| if (c > 3 * 0xffff + CYCX (7, 10)) |
| { |
| n = c; |
| /* There's 4 cycles in the short (i>0xffff) loop and 7 in the long (x<=0xffff) loop */ |
| if (c >= 0x10000 * 7 + CYCX (14, 16)) |
| { |
| i = 0x10000; |
| c -= CYCX (14, 16) + 7 * 0x10000; |
| i += c / 4; |
| c %= 4; |
| if ((unsigned long long) i > 0xffffffffULL) |
| { |
| error ("__delay_cycles is limited to 32-bit loop counts"); |
| return NULL_RTX; |
| } |
| } |
| else |
| { |
| i = (c - CYCX (14, 16)) / 7; |
| c -= CYCX (14, 16) + i * 7; |
| } |
| |
| if (cg_magic_constant (i & 0xffff)) |
| c ++; |
| if (cg_magic_constant ((i >> 16) & 0xffff)) |
| c ++; |
| |
| if (msp430x) |
| emit_insn (gen_delay_cycles_32x (GEN_INT (i), GEN_INT (n - c))); |
| else |
| emit_insn (gen_delay_cycles_32 (GEN_INT (i), GEN_INT (n - c))); |
| } |
| |
| /* For 16-bit loops, there's 7(10) + 3x cycles - so the max cycles is 0x30004(7). */ |
| if (c > 12) |
| { |
| n = c; |
| i = (c - CYCX (7, 10)) / 3; |
| c -= CYCX (7, 10) + i * 3; |
| |
| if (cg_magic_constant (i)) |
| c ++; |
| |
| if (msp430x) |
| emit_insn (gen_delay_cycles_16x (GEN_INT (i), GEN_INT (n - c))); |
| else |
| emit_insn (gen_delay_cycles_16 (GEN_INT (i), GEN_INT (n - c))); |
| } |
| |
| while (c > 1) |
| { |
| emit_insn (gen_delay_cycles_2 ()); |
| c -= 2; |
| } |
| |
| if (c) |
| { |
| emit_insn (gen_delay_cycles_1 ()); |
| c -= 1; |
| } |
| |
| emit_insn (gen_delay_cycles_end (arg)); |
| |
| return NULL_RTX; |
| } |
| |
| static rtx |
| msp430_expand_builtin (tree exp, |
| rtx target ATTRIBUTE_UNUSED, |
| rtx subtarget ATTRIBUTE_UNUSED, |
| machine_mode mode ATTRIBUTE_UNUSED, |
| int ignore ATTRIBUTE_UNUSED) |
| { |
| tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
| unsigned int fcode = DECL_FUNCTION_CODE (fndecl); |
| rtx arg1 = expand_normal (CALL_EXPR_ARG (exp, 0)); |
| |
| if (fcode == MSP430_BUILTIN_DELAY_CYCLES) |
| return msp430_expand_delay_cycles (arg1); |
| |
| if (! msp430_is_interrupt_func ()) |
| { |
| error ("MSP430 builtin functions only work inside interrupt handlers"); |
| return NULL_RTX; |
| } |
| |
| if (! REG_P (arg1) && ! CONSTANT_P (arg1)) |
| arg1 = force_reg (mode, arg1); |
| |
| switch (fcode) |
| { |
| case MSP430_BUILTIN_BIC_SR: emit_insn (gen_bic_SR (arg1)); break; |
| case MSP430_BUILTIN_BIS_SR: emit_insn (gen_bis_SR (arg1)); break; |
| default: |
| internal_error ("bad builtin code"); |
| break; |
| } |
| return NULL_RTX; |
| } |
| |
| #undef TARGET_INIT_BUILTINS |
| #define TARGET_INIT_BUILTINS msp430_init_builtins |
| |
| #undef TARGET_EXPAND_BUILTIN |
| #define TARGET_EXPAND_BUILTIN msp430_expand_builtin |
| |
| #undef TARGET_BUILTIN_DECL |
| #define TARGET_BUILTIN_DECL msp430_builtin_decl |
| |
| void |
| msp430_expand_prologue (void) |
| { |
| int i, j; |
| int fs; |
| /* Always use stack_pointer_rtx instead of calling |
| rtx_gen_REG ourselves. Code elsewhere in GCC assumes |
| that there is a single rtx representing the stack pointer, |
| namely stack_pointer_rtx, and uses == to recognize it. */ |
| rtx sp = stack_pointer_rtx; |
| rtx p; |
| |
| if (is_naked_func ()) |
| { |
| /* We must generate some RTX as thread_prologue_and_epilogue_insns() |
| examines the output of the gen_prologue() function. */ |
| emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0))); |
| return; |
| } |
| |
| emit_insn (gen_prologue_start_marker ()); |
| |
| if (is_critical_func ()) |
| { |
| emit_insn (gen_push_intr_state ()); |
| emit_insn (gen_disable_interrupts ()); |
| } |
| else if (is_reentrant_func ()) |
| emit_insn (gen_disable_interrupts ()); |
| |
| if (!cfun->machine->computed) |
| msp430_compute_frame_info (); |
| |
| if (flag_stack_usage_info) |
| current_function_static_stack_size = cfun->machine->framesize; |
| |
| if (crtl->args.pretend_args_size) |
| { |
| rtx note; |
| |
| gcc_assert (crtl->args.pretend_args_size == 2); |
| |
| p = emit_insn (gen_grow_and_swap ()); |
| |
| /* Document the stack decrement... */ |
| note = F (gen_rtx_SET (stack_pointer_rtx, |
| gen_rtx_MINUS (Pmode, stack_pointer_rtx, GEN_INT (2)))); |
| add_reg_note (p, REG_FRAME_RELATED_EXPR, note); |
| |
| /* ...and the establishment of a new location for the return address. */ |
| note = F (gen_rtx_SET (gen_rtx_MEM (Pmode, |
| gen_rtx_PLUS (Pmode, |
| stack_pointer_rtx, |
| GEN_INT (-2))), |
| pc_rtx)); |
| add_reg_note (p, REG_CFA_OFFSET, note); |
| F (p); |
| } |
| |
| for (i = 15; i >= 4; i--) |
| if (cfun->machine->need_to_save [i]) |
| { |
| int seq, count; |
| rtx note; |
| |
| for (seq = i - 1; seq >= 4 && cfun->machine->need_to_save[seq]; seq --) |
| ; |
| count = i - seq; |
| |
| if (msp430x) |
| { |
| /* Note: with TARGET_LARGE we still use PUSHM as PUSHX.A is two bytes bigger. */ |
| p = F (emit_insn (gen_pushm (gen_rtx_REG (Pmode, i), |
| GEN_INT (count)))); |
| |
| note = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (count + 1)); |
| |
| XVECEXP (note, 0, 0) |
| = F (gen_rtx_SET (stack_pointer_rtx, |
| gen_rtx_PLUS (Pmode, |
| stack_pointer_rtx, |
| GEN_INT (count * (TARGET_LARGE ? -4 : -2))))); |
| |
| /* *sp-- = R[i-j] */ |
| /* sp+N R10 |
| ... |
| sp R4 */ |
| for (j = 0; j < count; j ++) |
| { |
| rtx addr; |
| int ofs = (count - j - 1) * (TARGET_LARGE ? 4 : 2); |
| |
| if (ofs) |
| addr = gen_rtx_PLUS (Pmode, sp, GEN_INT (ofs)); |
| else |
| addr = stack_pointer_rtx; |
| |
| XVECEXP (note, 0, j + 1) = |
| F (gen_rtx_SET (gen_rtx_MEM (Pmode, addr), |
| gen_rtx_REG (Pmode, i - j)) ); |
| } |
| |
| add_reg_note (p, REG_FRAME_RELATED_EXPR, note); |
| i -= count - 1; |
| } |
| else |
| F (emit_insn (gen_push (gen_rtx_REG (Pmode, i)))); |
| } |
| |
| if (frame_pointer_needed) |
| F (emit_move_insn (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM), sp)); |
| |
| fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing; |
| |
| increment_stack (- fs); |
| |
| emit_insn (gen_prologue_end_marker ()); |
| } |
| |
| void |
| msp430_expand_epilogue (int is_eh) |
| { |
| int i; |
| int fs; |
| int helper_n = 0; |
| |
| if (is_naked_func ()) |
| { |
| /* We must generate some RTX as thread_prologue_and_epilogue_insns() |
| examines the output of the gen_epilogue() function. */ |
| emit_insn (gen_rtx_CLOBBER (VOIDmode, GEN_INT (0))); |
| return; |
| } |
| |
| if (cfun->machine->need_to_save [10]) |
| { |
| /* Check for a helper function. */ |
| helper_n = 7; /* For when the loop below never sees a match. */ |
| for (i = 9; i >= 4; i--) |
| if (!cfun->machine->need_to_save [i]) |
| { |
| helper_n = 10 - i; |
| for (; i >= 4; i--) |
| if (cfun->machine->need_to_save [i]) |
| { |
| helper_n = 0; |
| break; |
| } |
| break; |
| } |
| } |
| |
| emit_insn (gen_epilogue_start_marker ()); |
| |
| if (cfun->decl && strcmp (IDENTIFIER_POINTER (DECL_NAME (cfun->decl)), "main") == 0) |
| emit_insn (gen_msp430_refsym_need_exit ()); |
| |
| if (is_wakeup_func ()) |
| /* Clear the SCG1, SCG0, OSCOFF and CPUOFF bits in the saved copy of the |
| status register current residing on the stack. When this function |
| executes its RETI instruction the SR will be updated with this saved |
| value, thus ensuring that the processor is woken up from any low power |
| state in which it may be residing. */ |
| emit_insn (gen_bic_SR (GEN_INT (0xf0))); |
| |
| fs = cfun->machine->framesize_locals + cfun->machine->framesize_outgoing; |
| |
| increment_stack (fs); |
| |
| if (is_eh) |
| { |
| /* We need to add the right "SP" register save just after the |
| regular ones, so that when we pop it off we're in the EH |
| return frame, not this one. This overwrites our own return |
| address, but we're not going to be returning anyway. */ |
| rtx r12 = gen_rtx_REG (Pmode, 12); |
| rtx (*addPmode)(rtx, rtx, rtx) = TARGET_LARGE ? gen_addpsi3 : gen_addhi3; |
| |
| /* R12 will hold the new SP. */ |
| i = cfun->machine->framesize_regs; |
| emit_move_insn (r12, stack_pointer_rtx); |
| emit_insn (addPmode (r12, r12, EH_RETURN_STACKADJ_RTX)); |
| emit_insn (addPmode (r12, r12, GEN_INT (i))); |
| emit_move_insn (gen_rtx_MEM (Pmode, plus_constant (Pmode, stack_pointer_rtx, i)), r12); |
| } |
| |
| for (i = 4; i <= 15; i++) |
| if (cfun->machine->need_to_save [i]) |
| { |
| int seq, count; |
| |
| for (seq = i + 1; seq <= 15 && cfun->machine->need_to_save[seq]; seq ++) |
| ; |
| count = seq - i; |
| |
| if (msp430x) |
| { |
| /* Note: With TARGET_LARGE we still use |
| POPM as POPX.A is two bytes bigger. */ |
| emit_insn (gen_popm (stack_pointer_rtx, GEN_INT (seq - 1), |
| GEN_INT (count))); |
| i += count - 1; |
| } |
| else if (i == 11 - helper_n |
| && ! msp430_is_interrupt_func () |
| && ! is_reentrant_func () |
| && ! is_critical_func () |
| && crtl->args.pretend_args_size == 0 |
| /* Calling the helper takes as many bytes as the POP;RET sequence. */ |
| && helper_n > 1 |
| && !is_eh) |
| { |
| emit_insn (gen_epilogue_helper (GEN_INT (helper_n))); |
| return; |
| } |
| else |
| emit_insn (gen_pop (gen_rtx_REG (Pmode, i))); |
| } |
| |
| if (is_eh) |
| { |
| /* Also pop SP, which puts us into the EH return frame. Except |
| that you can't "pop" sp, you have to just load it off the |
| stack. */ |
| emit_move_insn (stack_pointer_rtx, gen_rtx_MEM (Pmode, stack_pointer_rtx)); |
| } |
| |
| if (crtl->args.pretend_args_size) |
| emit_insn (gen_swap_and_shrink ()); |
| |
| if (is_critical_func ()) |
| emit_insn (gen_pop_intr_state ()); |
| else if (is_reentrant_func ()) |
| emit_insn (gen_enable_interrupts ()); |
| |
| emit_jump_insn (gen_msp_return ()); |
| } |
| |
| /* Implements EH_RETURN_STACKADJ_RTX. Saved and used later in |
| m32c_emit_eh_epilogue. */ |
| rtx |
| msp430_eh_return_stackadj_rtx (void) |
| { |
| if (!cfun->machine->eh_stack_adjust) |
| { |
| rtx sa; |
| |
| sa = gen_rtx_REG (Pmode, 15); |
| cfun->machine->eh_stack_adjust = sa; |
| } |
| return cfun->machine->eh_stack_adjust; |
| } |
| |
| /* This function is called before reload, to "fix" the stack in |
| preparation for an EH return. */ |
| void |
| msp430_expand_eh_return (rtx eh_handler) |
| { |
| /* These are all Pmode */ |
| rtx ap, sa, ra, tmp; |
| |
| ap = arg_pointer_rtx; |
| sa = msp430_eh_return_stackadj_rtx (); |
| ra = eh_handler; |
| |
| tmp = ap; |
| tmp = gen_rtx_PLUS (Pmode, ap, sa); |
| tmp = plus_constant (Pmode, tmp, TARGET_LARGE ? -4 : -2); |
| tmp = gen_rtx_MEM (Pmode, tmp); |
| emit_move_insn (tmp, ra); |
| } |
| |
| #undef TARGET_INIT_DWARF_REG_SIZES_EXTRA |
| #define TARGET_INIT_DWARF_REG_SIZES_EXTRA msp430_init_dwarf_reg_sizes_extra |
| void |
| msp430_init_dwarf_reg_sizes_extra (tree address) |
| { |
| int i; |
| rtx addr = expand_normal (address); |
| rtx mem = gen_rtx_MEM (BLKmode, addr); |
| |
| /* This needs to match msp430_unwind_word_mode (above). */ |
| if (!msp430x) |
| return; |
| |
| for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) |
| { |
| unsigned int dnum = DWARF_FRAME_REGNUM (i); |
| unsigned int rnum = DWARF2_FRAME_REG_OUT (dnum, 1); |
| |
| if (rnum < DWARF_FRAME_REGISTERS) |
| { |
| HOST_WIDE_INT offset = rnum * GET_MODE_SIZE (QImode); |
| |
| emit_move_insn (adjust_address (mem, QImode, offset), |
| gen_int_mode (4, QImode)); |
| } |
| } |
| } |
| |
| /* This is a list of MD patterns that implement fixed-count shifts. */ |
| static struct |
| { |
| const char *name; |
| int count; |
| int need_430x; |
| rtx (*genfunc)(rtx,rtx); |
| } |
| const_shift_helpers[] = |
| { |
| #define CSH(N,C,X,G) { "__mspabi_" N, C, X, gen_##G } |
| |
| CSH ("slli", 1, 1, slli_1), |
| CSH ("slll", 1, 1, slll_1), |
| CSH ("slll", 2, 1, slll_2), |
| |
| CSH ("srai", 1, 0, srai_1), |
| CSH ("sral", 1, 0, sral_1), |
| CSH ("sral", 2, 0, sral_2), |
| |
| CSH ("srll", 1, 0, srll_1), |
| CSH ("srll", 2, 1, srll_2x), |
| { 0, 0, 0, 0 } |
| #undef CSH |
| }; |
| |
| /* The MSP430 ABI defines a number of helper functions that should be |
| used for, for example, 32-bit shifts. This function is called to |
| emit such a function, using the table above to optimize some |
| cases. */ |
| void |
| msp430_expand_helper (rtx *operands, const char *helper_name, bool const_variants) |
| { |
| rtx c, f; |
| char *helper_const = NULL; |
| int arg2 = 13; |
| int arg1sz = 1; |
| machine_mode arg0mode = GET_MODE (operands[0]); |
| machine_mode arg1mode = GET_MODE (operands[1]); |
| machine_mode arg2mode = GET_MODE (operands[2]); |
| int have_430x = msp430x ? 1 : 0; |
| |
| if (CONST_INT_P (operands[2])) |
| { |
| int i; |
| |
| for (i=0; const_shift_helpers[i].name; i++) |
| { |
| if (const_shift_helpers[i].need_430x <= have_430x |
| && strcmp (helper_name, const_shift_helpers[i].name) == 0 |
| && INTVAL (operands[2]) == const_shift_helpers[i].count) |
| { |
| emit_insn (const_shift_helpers[i].genfunc (operands[0], operands[1])); |
| return; |
| } |
| } |
| } |
| |
| if (arg1mode == VOIDmode) |
| arg1mode = arg0mode; |
| if (arg2mode == VOIDmode) |
| arg2mode = arg0mode; |
| |
| if (arg1mode == SImode) |
| { |
| arg2 = 14; |
| arg1sz = 2; |
| } |
| |
| if (const_variants |
| && CONST_INT_P (operands[2]) |
| && INTVAL (operands[2]) >= 1 |
| && INTVAL (operands[2]) <= 15) |
| { |
| /* Note that the INTVAL is limited in value and length by the conditional above. */ |
| int len = strlen (helper_name) + 4; |
| helper_const = (char *) xmalloc (len); |
| snprintf (helper_const, len, "%s_%d", helper_name, (int) INTVAL (operands[2])); |
| } |
| |
| emit_move_insn (gen_rtx_REG (arg1mode, 12), |
| operands[1]); |
| if (!helper_const) |
| emit_move_insn (gen_rtx_REG (arg2mode, arg2), |
| operands[2]); |
| |
| c = gen_call_value_internal (gen_rtx_REG (arg0mode, 12), |
| gen_rtx_SYMBOL_REF (VOIDmode, helper_const ? helper_const : helper_name), |
| GEN_INT (0)); |
| c = emit_call_insn (c); |
| RTL_CONST_CALL_P (c) = 1; |
| |
| f = 0; |
| use_regs (&f, 12, arg1sz); |
| if (!helper_const) |
| use_regs (&f, arg2, 1); |
| add_function_usage_to (c, f); |
| |
| emit_move_insn (operands[0], |
| gen_rtx_REG (arg0mode, 12)); |
| } |
| |
| /* Called by cbranch<mode>4 to coerce operands into usable forms. */ |
| void |
| msp430_fixup_compare_operands (machine_mode my_mode, rtx * operands) |
| { |
| /* constants we're looking for, not constants which are allowed. */ |
| int const_op_idx = 1; |
| |
| if (msp430_reversible_cmp_operator (operands[0], VOIDmode)) |
| const_op_idx = 2; |
| |
| if (GET_CODE (operands[const_op_idx]) != REG |
| && GET_CODE (operands[const_op_idx]) != MEM) |
| operands[const_op_idx] = copy_to_mode_reg (my_mode, operands[const_op_idx]); |
| } |
| |
| /* Simplify_gen_subreg() doesn't handle memory references the way we |
| need it to below, so we use this function for when we must get a |
| valid subreg in a "natural" state. */ |
| rtx |
| msp430_subreg (machine_mode mode, rtx r, machine_mode omode, int byte) |
| { |
| rtx rv; |
| |
| if (GET_CODE (r) == SUBREG |
| && SUBREG_BYTE (r) == 0) |
| { |
| rtx ireg = SUBREG_REG (r); |
| machine_mode imode = GET_MODE (ireg); |
| |
| /* special case for (HI (SI (PSI ...), 0)) */ |
| if (imode == PSImode |
| && mode == HImode |
| && byte == 0) |
| rv = gen_rtx_SUBREG (mode, ireg, byte); |
| else |
| rv = simplify_gen_subreg (mode, ireg, imode, byte); |
| } |
| else if (GET_CODE (r) == MEM) |
| rv = adjust_address (r, mode, byte); |
| else if (GET_CODE (r) == SYMBOL_REF |
| && (byte == 0 || byte == 2) |
| && mode == HImode) |
| { |
| rv = gen_rtx_ZERO_EXTRACT (HImode, r, GEN_INT (16), GEN_INT (8*byte)); |
| rv = gen_rtx_CONST (HImode, r); |
| } |
| else |
| rv = simplify_gen_subreg (mode, r, omode, byte); |
| |
| if (!rv) |
| gcc_unreachable (); |
| |
| return rv; |
| } |
| |
| /* Called by movsi_x to generate the HImode operands. */ |
| void |
| msp430_split_movsi (rtx *operands) |
| { |
| rtx op00, op02, op10, op12; |
| |
| op00 = msp430_subreg (HImode, operands[0], SImode, 0); |
| op02 = msp430_subreg (HImode, operands[0], SImode, 2); |
| |
| if (GET_CODE (operands[1]) == CONST |
| || GET_CODE (operands[1]) == SYMBOL_REF) |
| { |
| op10 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (0)); |
| op10 = gen_rtx_CONST (HImode, op10); |
| op12 = gen_rtx_ZERO_EXTRACT (HImode, operands[1], GEN_INT (16), GEN_INT (16)); |
| op12 = gen_rtx_CONST (HImode, op12); |
| } |
| else |
| { |
| op10 = msp430_subreg (HImode, operands[1], SImode, 0); |
| op12 = msp430_subreg (HImode, operands[1], SImode, 2); |
| } |
| |
| if (rtx_equal_p (operands[0], operands[1])) |
| { |
| operands[2] = op02; |
| operands[4] = op12; |
| operands[3] = op00; |
| operands[5] = op10; |
| } |
| else if (rtx_equal_p (op00, op12) |
| /* Catch the case where we are loading (rN, rN+1) from mem (rN). */ |
| || (REG_P (op00) && reg_mentioned_p (op00, op10)) |
| /* Or storing (rN) into mem (rN). */ |
| || (REG_P (op10) && reg_mentioned_p (op10, op00)) |
| ) |
| { |
| operands[2] = op02; |
| operands[4] = op12; |
| operands[3] = op00; |
| operands[5] = op10; |
| } |
| else |
| { |
| operands[2] = op00; |
| operands[4] = op10; |
| operands[3] = op02; |
| operands[5] = op12; |
| } |
| } |
| |
| |
| /* The MSPABI specifies the names of various helper functions, many of |
| which are compatible with GCC's helpers. This table maps the GCC |
| name to the MSPABI name. */ |
| static const struct |
| { |
| char const * const gcc_name; |
| char const * const ti_name; |
| } |
| helper_function_name_mappings [] = |
| { |
| /* Floating point to/from integer conversions. */ |
| { "__truncdfsf2", "__mspabi_cvtdf" }, |
| { "__extendsfdf2", "__mspabi_cvtfd" }, |
| { "__fixdfhi", "__mspabi_fixdi" }, |
| { "__fixdfsi", "__mspabi_fixdli" }, |
| { "__fixdfdi", "__mspabi_fixdlli" }, |
| { "__fixunsdfhi", "__mspabi_fixdu" }, |
| { "__fixunsdfsi", "__mspabi_fixdul" }, |
| { "__fixunsdfdi", "__mspabi_fixdull" }, |
| { "__fixsfhi", "__mspabi_fixfi" }, |
| { "__fixsfsi", "__mspabi_fixfli" }, |
| { "__fixsfdi", "__mspabi_fixflli" }, |
| { "__fixunsfhi", "__mspabi_fixfu" }, |
| { "__fixunsfsi", "__mspabi_fixful" }, |
| { "__fixunsfdi", "__mspabi_fixfull" }, |
| { "__floathisf", "__mspabi_fltif" }, |
| { "__floatsisf", "__mspabi_fltlif" }, |
| { "__floatdisf", "__mspabi_fltllif" }, |
| { "__floathidf", "__mspabi_fltid" }, |
| { "__floatsidf", "__mspabi_fltlid" }, |
| { "__floatdidf", "__mspabi_fltllid" }, |
| { "__floatunhisf", "__mspabi_fltuf" }, |
| { "__floatunsisf", "__mspabi_fltulf" }, |
| { "__floatundisf", "__mspabi_fltullf" }, |
| { "__floatunhidf", "__mspabi_fltud" }, |
| { "__floatunsidf", "__mspabi_fltuld" }, |
| { "__floatundidf", "__mspabi_fltulld" }, |
| |
| /* Floating point comparisons. */ |
| /* GCC uses individual functions for each comparison, TI uses one |
| compare <=> function. */ |
| |
| /* Floating point arithmatic */ |
| { "__adddf3", "__mspabi_addd" }, |
| { "__addsf3", "__mspabi_addf" }, |
| { "__divdf3", "__mspabi_divd" }, |
| { "__divsf3", "__mspabi_divf" }, |
| { "__muldf3", "__mspabi_mpyd" }, |
| { "__mulsf3", "__mspabi_mpyf" }, |
| { "__subdf3", "__mspabi_subd" }, |
| { "__subsf3", "__mspabi_subf" }, |
| /* GCC does not use helper functions for negation */ |
| |
| /* Integer multiply, divide, remainder. */ |
| { "__mulhi3", "__mspabi_mpyi" }, |
| { "__mulsi3", "__mspabi_mpyl" }, |
| { "__muldi3", "__mspabi_mpyll" }, |
| #if 0 |
| /* Clarify signed vs unsigned first. */ |
| { "__mulhisi3", "__mspabi_mpysl" }, /* gcc doesn't use widening multiply (yet?) */ |
| { "__mulsidi3", "__mspabi_mpysll" }, /* gcc doesn't use widening multiply (yet?) */ |
| #endif |
| |
| { "__divhi3", "__mspabi_divi" }, |
| { "__divsi3", "__mspabi_divli" }, |
| { "__divdi3", "__mspabi_divlli" }, |
| { "__udivhi3", "__mspabi_divu" }, |
| { "__udivsi3", "__mspabi_divul" }, |
| { "__udivdi3", "__mspabi_divull" }, |
| { "__modhi3", "__mspabi_remi" }, |
| { "__modsi3", "__mspabi_remli" }, |
| { "__moddi3", "__mspabi_remlli" }, |
| { "__umodhi3", "__mspabi_remu" }, |
| { "__umodsi3", "__mspabi_remul" }, |
| { "__umoddi3", "__mspabi_remull" }, |
| |
| /* Bitwise operations. */ |
| /* Rotation - no rotation support yet. */ |
| /* Logical left shift - gcc already does these itself. */ |
| /* Arithmetic left shift - gcc already does these itself. */ |
| /* Arithmetic right shift - gcc already does these itself. */ |
| |
| { NULL, NULL } |
| }; |
| |
| /* Returns true if the current MCU supports an F5xxx series |
| hardware multiper. */ |
| |
| bool |
| msp430_use_f5_series_hwmult (void) |
| { |
| static const char * cached_match = NULL; |
| static bool cached_result; |
| |
| if (msp430_hwmult_type == MSP430_HWMULT_F5SERIES) |
| return true; |
| |
| if (target_mcu == NULL || msp430_hwmult_type != MSP430_HWMULT_AUTO) |
| return false; |
| |
| if (target_mcu == cached_match) |
| return cached_result; |
| |
| cached_match = target_mcu; |
| |
| if (strncasecmp (target_mcu, "msp430f5", 8) == 0) |
| return cached_result = true; |
| if (strncasecmp (target_mcu, "msp430fr5", 9) == 0) |
| return cached_result = true; |
| if (strncasecmp (target_mcu, "msp430f6", 8) == 0) |
| return cached_result = true; |
| |
| int i; |
| |
| /* FIXME: This array is alpha sorted - we could use a binary search. */ |
| for (i = ARRAY_SIZE (msp430_mcu_data); i--;) |
| if (strcasecmp (target_mcu, msp430_mcu_data[i].name) == 0) |
| return cached_result = msp430_mcu_data[i].hwmpy == 8; |
| |
| return cached_result = false; |
| } |
| |
| /* Returns true if the current MCU has a second generation |
| 32-bit hardware multiplier. */ |
| |
| static bool |
| use_32bit_hwmult (void) |
| { |
| static const char * cached_match = NULL; |
| static bool cached_result; |
| int i; |
| |
| if (msp430_hwmult_type == MSP430_HWMULT_LARGE) |
| return true; |
| |
| if (target_mcu == NULL || msp430_hwmult_type != MSP430_HWMULT_AUTO) |
| return false; |
| |
| if (target_mcu == cached_match) |
| return cached_result; |
| |
| cached_match = target_mcu; |
| |
| /* FIXME: This array is alpha sorted - we could use a binary search. */ |
| for (i = ARRAY_SIZE (msp430_mcu_data); i--;) |
| if (strcasecmp (target_mcu, msp430_mcu_data[i].name) == 0) |
| return cached_result = msp430_mcu_data[i].hwmpy == 4; |
| |
| return cached_result = false; |
| } |
| |
| /* Returns true if the current MCU does not have a |
| hardware multiplier of any kind. */ |
| |
| static bool |
| msp430_no_hwmult (void) |
| { |
| static const char * cached_match = NULL; |
| static bool cached_result; |
| int i; |
| |
| if (msp430_hwmult_type == MSP430_HWMULT_NONE) |
| return true; |
| |
| if (msp430_hwmult_type != MSP430_HWMULT_AUTO) |
| return false; |
| |
| if (target_mcu == NULL) |
| return true; |
| |
| if (target_mcu == cached_match) |
| return cached_result; |
| |
| cached_match = target_mcu; |
| |
| /* FIXME: This array is alpha sorted - we could use a binary search. */ |
| for (i = ARRAY_SIZE (msp430_mcu_data); i--;) |
| if (strcasecmp (target_mcu, msp430_mcu_data[i].name) == 0) |
| return cached_result = msp430_mcu_data[i].hwmpy == 0; |
| |
| /* If we do not recognise the MCU name, we assume that it does not support |
| any kind of hardware multiply - this is the safest assumption to make. */ |
| return cached_result = true; |
| } |
| |
| /* This function does the same as the default, but it will replace GCC |
| function names with the MSPABI-specified ones. */ |
| |
| void |
| msp430_output_labelref (FILE *file, const char *name) |
| { |
| int i; |
| |
| for (i = 0; helper_function_name_mappings [i].gcc_name; i++) |
| if (strcmp (helper_function_name_mappings [i].gcc_name, name) == 0) |
| { |
| name = helper_function_name_mappings [i].ti_name; |
| break; |
| } |
| |
| /* If we have been given a specific MCU name then we may be |
| able to make use of its hardware multiply capabilities. */ |
| if (msp430_hwmult_type != MSP430_HWMULT_NONE) |
| { |
| if (strcmp ("__mspabi_mpyi", name) == 0) |
| { |
| if (msp430_use_f5_series_hwmult ()) |
| name = "__mulhi2_f5"; |
| else if (! msp430_no_hwmult ()) |
| name = "__mulhi2"; |
| } |
| else if (strcmp ("__mspabi_mpyl", name) == 0) |
| { |
| if (msp430_use_f5_series_hwmult ()) |
| name = "__mulsi2_f5"; |
| else if (use_32bit_hwmult ()) |
| name = "__mulsi2_hw32"; |
| else if (! msp430_no_hwmult ()) |
| name = "__mulsi2"; |
| } |
| } |
| |
| fputs (name, file); |
| } |
| |
| /* Common code for msp430_print_operand... */ |
| |
| static void |
| msp430_print_operand_raw (FILE * file, rtx op) |
| { |
| HOST_WIDE_INT i; |
| |
| switch (GET_CODE (op)) |
| { |
| case REG: |
| fprintf (file, "%s", reg_names [REGNO (op)]); |
| break; |
| |
| case CONST_INT: |
| i = INTVAL (op); |
| if (TARGET_ASM_HEX) |
| fprintf (file, "%#" HOST_WIDE_INT_PRINT "x", i); |
| else |
| fprintf (file, "%" HOST_WIDE_INT_PRINT "d", i); |
| break; |
| |
| case CONST: |
| case PLUS: |
| case MINUS: |
| case SYMBOL_REF: |
| case LABEL_REF: |
| output_addr_const (file, op); |
| break; |
| |
| default: |
| print_rtl (file, op); |
| break; |
| } |
| } |
| |
| #undef TARGET_PRINT_OPERAND_ADDRESS |
| #define TARGET_PRINT_OPERAND_ADDRESS msp430_print_operand_addr |
| |
| /* Output to stdio stream FILE the assembler syntax for an |
| instruction operand that is a memory reference whose address |
| is ADDR. */ |
| |
| static void |
| msp430_print_operand_addr (FILE * file, machine_mode /*mode*/, rtx addr) |
| { |
| switch (GET_CODE (addr)) |
| { |
| case PLUS: |
| msp430_print_operand_raw (file, XEXP (addr, 1)); |
| gcc_assert (REG_P (XEXP (addr, 0))); |
| fprintf (file, "(%s)", reg_names [REGNO (XEXP (addr, 0))]); |
| return; |
| |
| case REG: |
| fprintf (file, "@"); |
| break; |
| |
| case CONST: |
| case CONST_INT: |
| case SYMBOL_REF: |
| case LABEL_REF: |
| fprintf (file, "&"); |
| break; |
| |
| default: |
| break; |
| } |
| |
| msp430_print_operand_raw (file, addr); |
| } |
| |
| #undef TARGET_PRINT_OPERAND |
| #define TARGET_PRINT_OPERAND msp430_print_operand |
| |
| /* A low 16-bits of int/lower of register pair |
| B high 16-bits of int/higher of register pair |
| C bits 32-47 of a 64-bit value/reg 3 of a DImode value |
| D bits 48-63 of a 64-bit value/reg 4 of a DImode value |
| H like %B (for backwards compatibility) |
| I inverse of value |
| J an integer without a # prefix |
| L like %A (for backwards compatibility) |
| O offset of the top of the stack |
| Q like X but generates an A postfix |
| R inverse of condition code, unsigned. |
| X X instruction postfix in large mode |
| Y value - 4 |
| Z value - 1 |
| b .B or .W or .A, depending upon the mode |
| p bit position |
| r inverse of condition code |
| x like X but only for pointers. */ |
| |
| static void |
| msp430_print_operand (FILE * file, rtx op, int letter) |
| { |
| rtx addr; |
| |
| /* We can't use c, n, a, or l. */ |
| switch (letter) |
| { |
| case 'Z': |
| gcc_assert (CONST_INT_P (op)); |
| /* Print the constant value, less one. */ |
| fprintf (file, "#%ld", INTVAL (op) - 1); |
| return; |
| case 'Y': |
| gcc_assert (CONST_INT_P (op)); |
| /* Print the constant value, less four. */ |
| fprintf (file, "#%ld", INTVAL (op) - 4); |
| return; |
| case 'I': |
| if (GET_CODE (op) == CONST_INT) |
| { |
| /* Inverse of constants */ |
| int i = INTVAL (op); |
| fprintf (file, "%d", ~i); |
| return; |
| } |
| op = XEXP (op, 0); |
| break; |
| case 'r': /* Conditional jump where the condition is reversed. */ |
| switch (GET_CODE (op)) |
| { |
| case EQ: fprintf (file, "NE"); break; |
| case NE: fprintf (file, "EQ"); break; |
| case GEU: fprintf (file, "LO"); break; |
| case LTU: fprintf (file, "HS"); break; |
| case GE: fprintf (file, "L"); break; |
| case LT: fprintf (file, "GE"); break; |
| /* Assume these have reversed operands. */ |
| case GTU: fprintf (file, "HS"); break; |
| case LEU: fprintf (file, "LO"); break; |
| case GT: fprintf (file, "GE"); break; |
| case LE: fprintf (file, "L"); break; |
| default: |
| msp430_print_operand_raw (file, op); |
| break; |
| } |
| return; |
| case 'R': /* Conditional jump where the operands are reversed. */ |
| switch (GET_CODE (op)) |
| { |
| case GTU: fprintf (file, "LO"); break; |
| case LEU: fprintf (file, "HS"); break; |
| case GT: fprintf (file, "L"); break; |
| case LE: fprintf (file, "GE"); break; |
| default: |
| msp430_print_operand_raw (file, op); |
| break; |
| } |
| return; |
| case 'p': /* Bit position. 0 == 0x01, 3 = 0x08 etc. */ |
| gcc_assert (CONST_INT_P (op)); |
| fprintf (file, "#%d", 1 << INTVAL (op)); |
| return; |
| case 'b': |
| switch (GET_MODE (op)) |
| { |
| case E_QImode: fprintf (file, ".B"); return; |
| case E_HImode: fprintf (file, ".W"); return; |
| case E_PSImode: fprintf (file, ".A"); return; |
| case E_SImode: fprintf (file, ".A"); return; |
| default: |
| return; |
| } |
| case 'A': |
| case 'L': /* Low half. */ |
| switch (GET_CODE (op)) |
| { |
| case MEM: |
| op = adjust_address (op, Pmode, 0); |
| break; |
| case REG: |
| break; |
| case CONST_INT: |
| op = GEN_INT (INTVAL (op) & 0xffff); |
| letter = 0; |
| break; |
| default: |
| /* If you get here, figure out a test case :-) */ |
| gcc_unreachable (); |
| } |
| break; |
| case 'B': |
| case 'H': /* high half */ |
| switch (GET_CODE (op)) |
| { |
| case MEM: |
| op = adjust_address (op, Pmode, 2); |
| break; |
| case REG: |
| op = gen_rtx_REG (Pmode, REGNO (op) + 1); |
| break; |
| case CONST_INT: |
| op = GEN_INT (INTVAL (op) >> 16); |
| letter = 0; |
| break; |
| default: |
| /* If you get here, figure out a test case :-) */ |
| gcc_unreachable (); |
| } |
| break; |
| case 'C': |
| switch (GET_CODE (op)) |
| { |
| case MEM: |
| op = adjust_address (op, Pmode, 3); |
| break; |
| case REG: |
| op = gen_rtx_REG (Pmode, REGNO (op) + 2); |
| break; |
| case CONST_INT: |
| op = GEN_INT ((long long) INTVAL (op) >> 32); |
| letter = 0; |
| break; |
| default: |
| /* If you get here, figure out a test case :-) */ |
| gcc_unreachable (); |
| } |
| break; |
| case 'D': |
| switch (GET_CODE (op)) |
| { |
| case MEM: |
| op = adjust_address (op, Pmode, 4); |
| break; |
| case REG: |
| op = gen_rtx_REG (Pmode, REGNO (op) + 3); |
| break; |
| case CONST_INT: |
| op = GEN_INT ((long long) INTVAL (op) >> 48); |
| letter = 0; |
| break; |
| default: |
| /* If you get here, figure out a test case :-) */ |
| gcc_unreachable (); |
| } |
| break; |
| |
| case 'X': |
| /* This is used to turn, for example, an ADD opcode into an ADDX |
| opcode when we're using 20-bit addresses. */ |
| if (TARGET_LARGE || GET_MODE (op) == PSImode) |
| fprintf (file, "X"); |
| /* We don't care which operand we use, but we want 'X' in the MD |
| file, so we do it this way. */ |
| return; |
| |
| case 'x': |
| /* Similarly, but only for PSImodes. BIC, for example, needs this. */ |
| if (GET_MODE (op) == PSImode) |
| fprintf (file, "X"); |
| return; |
| |
| case 'Q': |
| /* Likewise, for BR -> BRA. */ |
| if (TARGET_LARGE) |
| fprintf (file, "A"); |
| return; |
| |
| case 'O': |
| /* Computes the offset to the top of the stack for the current frame. |
| This has to be done here rather than in, say, msp430_expand_builtin() |
| because builtins are expanded before the frame layout is determined. */ |
| fprintf (file, "%d", |
| msp430_initial_elimination_offset (ARG_POINTER_REGNUM, STACK_POINTER_REGNUM) |
| - (TARGET_LARGE ? 4 : 2)); |
| return; |
| |
| case 'J': |
| gcc_assert (GET_CODE (op) == CONST_INT); |
| case 0: |
| break; |
| default: |
| output_operand_lossage ("invalid operand prefix"); |
| return; |
| } |
| |
| switch (GET_CODE (op)) |
| { |
| case REG: |
| msp430_print_operand_raw (file, op); |
| break; |
| |
| case MEM: |
| addr = XEXP (op, 0); |
| msp430_print_operand_addr (file, GET_MODE (op), addr); |
| break; |
| |
| case CONST: |
| if (GET_CODE (XEXP (op, 0)) == ZERO_EXTRACT) |
| { |
| op = XEXP (op, 0); |
| switch (INTVAL (XEXP (op, 2))) |
| { |
| case 0: |
| fprintf (file, "#lo ("); |
| msp430_print_operand_raw (file, XEXP (op, 0)); |
| fprintf (file, ")"); |
| break; |
| |
| case 16: |
| fprintf (file, "#hi ("); |
| msp430_print_operand_raw (file, XEXP (op, 0)); |
| fprintf (file, ")"); |
| break; |
| |
| default: |
| output_operand_lossage ("invalid zero extract"); |
| break; |
| } |
| break; |
| } |
| /* Fall through. */ |
| case CONST_INT: |
| case SYMBOL_REF: |
| case LABEL_REF: |
| if (letter == 0) |
| fprintf (file, "#"); |
| msp430_print_operand_raw (file, op); |
| break; |
| |
| case EQ: fprintf (file, "EQ"); break; |
| case NE: fprintf (file, "NE"); break; |
| case GEU: fprintf (file, "HS"); break; |
| case LTU: fprintf (file, "LO"); break; |
| case GE: fprintf (file, "GE"); break; |
| case LT: fprintf (file, "L"); break; |
| |
| default: |
| print_rtl (file, op); |
| break; |
| } |
| } |
| |
| |
| /* Frame stuff. */ |
| |
| rtx |
| msp430_return_addr_rtx (int count) |
| { |
| int ra_size; |
| if (count) |
| return NULL_RTX; |
| |
| ra_size = TARGET_LARGE ? 4 : 2; |
| if (crtl->args.pretend_args_size) |
| ra_size += 2; |
| |
| return gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (- ra_size))); |
| } |
| |
| rtx |
| msp430_incoming_return_addr_rtx (void) |
| { |
| return gen_rtx_MEM (Pmode, stack_pointer_rtx); |
| } |
| |
| /* Instruction generation stuff. */ |
| |
| /* Generate a sequence of instructions to sign-extend an HI |
| value into an SI value. Handles the tricky case where |
| we are overwriting the destination. */ |
| |
| const char * |
| msp430x_extendhisi (rtx * operands) |
| { |
| if (REGNO (operands[0]) == REGNO (operands[1])) |
| /* Low word of dest == source word. */ |
| return "BIT.W\t#0x8000, %L0 { SUBC.W\t%H0, %H0 { INV.W\t%H0, %H0"; /* 8-bytes. */ |
| |
| if (! msp430x) |
| /* Note: This sequence is approximately the same length as invoking a helper |
| function to perform the sign-extension, as in: |
| |
| MOV.W %1, %L0 |
| MOV.W %1, r12 |
| CALL __mspabi_srai_15 |
| MOV.W r12, %H0 |
| |
| but this version does not involve any function calls or using argument |
| registers, so it reduces register pressure. */ |
| return "MOV.W\t%1, %L0 { BIT.W\t#0x8000, %L0 { SUBC.W\t%H0, %H0 { INV.W\t%H0, %H0"; /* 10-bytes. */ |
| |
| if (REGNO (operands[0]) + 1 == REGNO (operands[1])) |
| /* High word of dest == source word. */ |
| return "MOV.W\t%1, %L0 { RPT\t#15 { RRAX.W\t%H0"; /* 6-bytes. */ |
| |
| /* No overlap between dest and source. */ |
| return "MOV.W\t%1, %L0 { MOV.W\t%1, %H0 { RPT\t#15 { RRAX.W\t%H0"; /* 8-bytes. */ |
| } |
| |
| /* Likewise for logical right shifts. */ |
| const char * |
| msp430x_logical_shift_right (rtx amount) |
| { |
| /* The MSP430X's logical right shift instruction - RRUM - does |
| not use an extension word, so we cannot encode a repeat count. |
| Try various alternatives to work around this. If the count |
| is in a register we are stuck, hence the assert. */ |
| gcc_assert (CONST_INT_P (amount)); |
| |
| if (INTVAL (amount) <= 0 |
| || INTVAL (amount) >= 16) |
| return "# nop logical shift."; |
| |
| if (INTVAL (amount) > 0 |
| && INTVAL (amount) < 5) |
| return "rrum.w\t%2, %0"; /* Two bytes. */ |
| |
| if (INTVAL (amount) > 4 |
| && INTVAL (amount) < 9) |
| return "rrum.w\t#4, %0 { rrum.w\t%Y2, %0 "; /* Four bytes. */ |
| |
| /* First we logically shift right by one. Now we know |
| that the top bit is zero and we can use the arithmetic |
| right shift instruction to perform the rest of the shift. */ |
| return "rrum.w\t#1, %0 { rpt\t%Z2 { rrax.w\t%0"; /* Six bytes. */ |
| } |
| |
| /* Stop GCC from thinking that it can eliminate (SUBREG:PSI (SI)). */ |
| |
| #undef TARGET_CAN_CHANGE_MODE_CLASS |
| #define TARGET_CAN_CHANGE_MODE_CLASS msp430_can_change_mode_class |
| |
| static bool |
| msp430_can_change_mode_class (machine_mode from, machine_mode to, reg_class_t) |
| { |
| if ((to == PSImode && from == SImode) |
| || (to == SImode && from == PSImode) |
| || (to == DImode && from == PSImode) |
| || (to == PSImode && from == DImode)) |
| return false; |
| return true; |
| } |
| |
| struct gcc_target targetm = TARGET_INITIALIZER; |
| |
| #include "gt-msp430.h" |