| /* Subroutines for insn-output.c for Hitachi H8/300. |
| Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 2001, 2002 Free Software Foundation, Inc. |
| Contributed by Steve Chamberlain (sac@cygnus.com), |
| Jim Wilson (wilson@cygnus.com), and Doug Evans (dje@cygnus.com). |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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 2, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "rtl.h" |
| #include "tree.h" |
| #include "regs.h" |
| #include "hard-reg-set.h" |
| #include "real.h" |
| #include "insn-config.h" |
| #include "conditions.h" |
| #include "output.h" |
| #include "insn-attr.h" |
| #include "flags.h" |
| #include "recog.h" |
| #include "expr.h" |
| #include "function.h" |
| #include "toplev.h" |
| #include "c-pragma.h" |
| #include "tm_p.h" |
| #include "ggc.h" |
| #include "target.h" |
| #include "target-def.h" |
| |
| /* Forward declarations. */ |
| static const char *byte_reg PARAMS ((rtx, int)); |
| static int h8300_interrupt_function_p PARAMS ((tree)); |
| static int h8300_monitor_function_p PARAMS ((tree)); |
| static int h8300_os_task_function_p PARAMS ((tree)); |
| static void dosize PARAMS ((FILE *, const char *, unsigned int)); |
| static int round_frame_size PARAMS ((int)); |
| static unsigned int compute_saved_regs PARAMS ((void)); |
| static void push PARAMS ((FILE *, int)); |
| static void pop PARAMS ((FILE *, int)); |
| static const char *cond_string PARAMS ((enum rtx_code)); |
| static unsigned int h8300_asm_insn_count PARAMS ((const char *)); |
| const struct attribute_spec h8300_attribute_table[]; |
| static tree h8300_handle_fndecl_attribute PARAMS ((tree *, tree, tree, int, bool *)); |
| static tree h8300_handle_eightbit_data_attribute PARAMS ((tree *, tree, tree, int, bool *)); |
| static tree h8300_handle_tiny_data_attribute PARAMS ((tree *, tree, tree, int, bool *)); |
| static void h8300_output_function_prologue PARAMS ((FILE *, HOST_WIDE_INT)); |
| static void h8300_output_function_epilogue PARAMS ((FILE *, HOST_WIDE_INT)); |
| #ifndef OBJECT_FORMAT_ELF |
| static void h8300_asm_named_section PARAMS ((const char *, unsigned int)); |
| #endif |
| |
| /* CPU_TYPE, says what cpu we're compiling for. */ |
| int cpu_type; |
| |
| /* True if the current function is an interrupt handler |
| (either via #pragma or an attribute specification). */ |
| static int interrupt_handler; |
| |
| /* True if the current function is an OS Task |
| (via an attribute specification). */ |
| static int os_task; |
| |
| /* True if the current function is a monitor |
| (via an attribute specification). */ |
| static int monitor; |
| |
| /* True if a #pragma saveall has been seen for the current function. */ |
| static int pragma_saveall; |
| |
| static const char *const names_big[] = |
| { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7" }; |
| |
| static const char *const names_extended[] = |
| { "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7" }; |
| |
| static const char *const names_upper_extended[] = |
| { "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7" }; |
| |
| /* Points to one of the above. */ |
| /* ??? The above could be put in an array indexed by CPU_TYPE. */ |
| const char * const *h8_reg_names; |
| |
| /* Various operations needed by the following, indexed by CPU_TYPE. */ |
| |
| const char *h8_push_op, *h8_pop_op, *h8_mov_op; |
| |
| /* Initialize the GCC target structure. */ |
| #undef TARGET_ATTRIBUTE_TABLE |
| #define TARGET_ATTRIBUTE_TABLE h8300_attribute_table |
| |
| #undef TARGET_ASM_ALIGNED_HI_OP |
| #define TARGET_ASM_ALIGNED_HI_OP "\t.word\t" |
| |
| #undef TARGET_ASM_FUNCTION_PROLOGUE |
| #define TARGET_ASM_FUNCTION_PROLOGUE h8300_output_function_prologue |
| #undef TARGET_ASM_FUNCTION_EPILOGUE |
| #define TARGET_ASM_FUNCTION_EPILOGUE h8300_output_function_epilogue |
| |
| struct gcc_target targetm = TARGET_INITIALIZER; |
| |
| /* Initialize various cpu specific globals at start up. */ |
| |
| void |
| h8300_init_once () |
| { |
| static const char *const h8_push_ops[2] = { "push" , "push.l" }; |
| static const char *const h8_pop_ops[2] = { "pop" , "pop.l" }; |
| static const char *const h8_mov_ops[2] = { "mov.w", "mov.l" }; |
| |
| if (TARGET_H8300) |
| { |
| cpu_type = (int) CPU_H8300; |
| h8_reg_names = names_big; |
| } |
| else |
| { |
| /* For this we treat the H8/300H and H8/S the same. */ |
| cpu_type = (int) CPU_H8300H; |
| h8_reg_names = names_extended; |
| } |
| h8_push_op = h8_push_ops[cpu_type]; |
| h8_pop_op = h8_pop_ops[cpu_type]; |
| h8_mov_op = h8_mov_ops[cpu_type]; |
| |
| if (!TARGET_H8300S && TARGET_MAC) |
| { |
| error ("-ms2600 is used without -ms"); |
| target_flags |= 1; |
| } |
| } |
| |
| static const char * |
| byte_reg (x, b) |
| rtx x; |
| int b; |
| { |
| static const char *const names_small[] = { |
| "r0l", "r0h", "r1l", "r1h", "r2l", "r2h", "r3l", "r3h", |
| "r4l", "r4h", "r5l", "r5h", "r6l", "r6h", "r7l", "r7h" |
| }; |
| |
| return names_small[REGNO (x) * 2 + b]; |
| } |
| |
| /* REGNO must be saved/restored across calls if this macro is true. */ |
| |
| #define WORD_REG_USED(regno) \ |
| (regno < 7 \ |
| /* No need to save registers if this function will not return. */ \ |
| && ! TREE_THIS_VOLATILE (current_function_decl) \ |
| && (pragma_saveall \ |
| /* Save any call saved register that was used. */ \ |
| || (regs_ever_live[regno] && !call_used_regs[regno]) \ |
| /* Save the frame pointer if it was used. */ \ |
| || (regno == FRAME_POINTER_REGNUM && regs_ever_live[regno]) \ |
| /* Save any register used in an interrupt handler. */ \ |
| || (interrupt_handler && regs_ever_live[regno]) \ |
| /* Save call clobbered registers in non-leaf interrupt \ |
| handlers. */ \ |
| || (interrupt_handler \ |
| && call_used_regs[regno] \ |
| && !current_function_is_leaf))) |
| |
| /* Output assembly language to FILE for the operation OP with operand size |
| SIZE to adjust the stack pointer. */ |
| |
| static void |
| dosize (file, op, size) |
| FILE *file; |
| const char *op; |
| unsigned int size; |
| { |
| /* On the H8/300H and H8/S, for sizes <= 8 bytes, it is as good or |
| better to use adds/subs insns rather than add.l/sub.l with an |
| immediate value. |
| |
| Also, on the H8/300, if we don't have a temporary to hold the |
| size of the frame in the prologue, we simply emit a sequence of |
| subs since this shouldn't happen often. */ |
| if ((TARGET_H8300 && size <= 4) |
| || ((TARGET_H8300H || TARGET_H8300S) && size <= 8) |
| || (TARGET_H8300 && interrupt_handler) |
| || (TARGET_H8300 && current_function_needs_context |
| && ! strcmp (op, "sub"))) |
| { |
| unsigned HOST_WIDE_INT amount; |
| |
| /* Try different amounts in descending order. */ |
| for (amount = (TARGET_H8300H || TARGET_H8300S) ? 4 : 2; |
| amount > 0; |
| amount /= 2) |
| { |
| for (; size >= amount; size -= amount) |
| fprintf (file, "\t%ss\t#%d,sp\n", op, amount); |
| } |
| } |
| else |
| { |
| if (TARGET_H8300) |
| fprintf (file, "\tmov.w\t#%d,r3\n\t%s.w\tr3,sp\n", size, op); |
| else |
| fprintf (file, "\t%s.l\t#%d,sp\n", op, size); |
| } |
| } |
| |
| /* Round up frame size SIZE. */ |
| |
| static int |
| round_frame_size (size) |
| int size; |
| { |
| return (size + STACK_BOUNDARY / 8 - 1) & -STACK_BOUNDARY / 8; |
| } |
| |
| /* Compute which registers to push/pop. |
| Return a bit vector of registers. */ |
| |
| static unsigned int |
| compute_saved_regs () |
| { |
| unsigned int saved_regs = 0; |
| int regno; |
| |
| /* Construct a bit vector of registers to be pushed/popped. */ |
| for (regno = 0; regno <= 6; regno++) |
| { |
| if (WORD_REG_USED (regno)) |
| saved_regs |= 1 << regno; |
| } |
| |
| /* Don't push/pop the frame pointer as it is treated separately. */ |
| if (frame_pointer_needed) |
| saved_regs &= ~(1 << FRAME_POINTER_REGNUM); |
| |
| return saved_regs; |
| } |
| |
| /* Output assembly language code to push register RN. */ |
| |
| static void |
| push (file, rn) |
| FILE *file; |
| int rn; |
| { |
| fprintf (file, "\t%s\t%s\n", h8_push_op, h8_reg_names[rn]); |
| } |
| |
| /* Output assembly language code to pop register RN. */ |
| |
| static void |
| pop (file, rn) |
| FILE *file; |
| int rn; |
| { |
| fprintf (file, "\t%s\t%s\n", h8_pop_op, h8_reg_names[rn]); |
| } |
| |
| /* This is what the stack looks like after the prolog of |
| a function with a frame has been set up: |
| |
| <args> |
| PC |
| FP <- fp |
| <locals> |
| <saved registers> <- sp |
| |
| This is what the stack looks like after the prolog of |
| a function which doesn't have a frame: |
| |
| <args> |
| PC |
| <locals> |
| <saved registers> <- sp |
| */ |
| |
| /* Output assembly language code for the function prologue. */ |
| |
| static void |
| h8300_output_function_prologue (file, size) |
| FILE *file; |
| HOST_WIDE_INT size; |
| { |
| int fsize = round_frame_size (size); |
| int idx; |
| int saved_regs; |
| int n_regs; |
| |
| /* Note a function with the interrupt attribute and set interrupt_handler |
| accordingly. */ |
| if (h8300_interrupt_function_p (current_function_decl)) |
| interrupt_handler = 1; |
| |
| /* If the current function has the OS_Task attribute set, then |
| we have a naked prologue. */ |
| if (h8300_os_task_function_p (current_function_decl)) |
| { |
| fprintf (file, ";OS_Task prologue\n"); |
| os_task = 1; |
| return; |
| } |
| |
| if (h8300_monitor_function_p (current_function_decl)) |
| { |
| /* My understanding of monitor functions is they act just |
| like interrupt functions, except the prologue must |
| mask interrupts. */ |
| fprintf (file, ";monitor prologue\n"); |
| interrupt_handler = 1; |
| monitor = 1; |
| if (TARGET_H8300) |
| { |
| fprintf (file, "\tsubs\t#2,sp\n"); |
| push (file, 0); |
| fprintf (file, "\tstc\tccr,r0l\n"); |
| fprintf (file, "\tmov.b\tr0l,@(2,sp)\n"); |
| pop (file, 0); |
| fprintf (file, "\torc\t#128,ccr\n"); |
| } |
| else if (TARGET_H8300H) |
| { |
| push (file, 0); |
| fprintf (file, "\tstc\tccr,r0l\n"); |
| fprintf (file, "\tmov.b\tr0l,@(4,sp)\n"); |
| pop (file, 0); |
| fprintf (file, "\torc\t#128,ccr\n"); |
| } |
| else if (TARGET_H8300S) |
| { |
| fprintf (file, "\tstc\texr,@-sp\n"); |
| push (file, 0); |
| fprintf (file, "\tstc\tccr,r0l\n"); |
| fprintf (file, "\tmov.b\tr0l,@(6,sp)\n"); |
| pop (file, 0); |
| fprintf (file, "\torc\t#128,ccr\n"); |
| } |
| else |
| abort (); |
| } |
| |
| if (frame_pointer_needed) |
| { |
| /* Push fp. */ |
| push (file, FRAME_POINTER_REGNUM); |
| fprintf (file, "\t%s\t%s,%s\n", h8_mov_op, |
| h8_reg_names[STACK_POINTER_REGNUM], |
| h8_reg_names[FRAME_POINTER_REGNUM]); |
| } |
| |
| /* Leave room for locals. */ |
| dosize (file, "sub", fsize); |
| |
| /* Push the rest of the registers in ascending order. */ |
| saved_regs = compute_saved_regs (); |
| for (idx = 0; idx < FIRST_PSEUDO_REGISTER; idx += n_regs) |
| { |
| int regno = idx; |
| |
| n_regs = 1; |
| if (saved_regs & (1 << regno)) |
| { |
| if (TARGET_H8300S) |
| { |
| /* See how many registers we can push at the same time. */ |
| if ((regno == 0 || regno == 4) |
| && ((saved_regs >> regno) & 0x0f) == 0x0f) |
| n_regs = 4; |
| |
| else if ((regno == 0 || regno == 4) |
| && ((saved_regs >> regno) & 0x07) == 0x07) |
| n_regs = 3; |
| |
| else if ((regno == 0 || regno == 2 || regno == 4 || regno == 6) |
| && ((saved_regs >> regno) & 0x03) == 0x03) |
| n_regs = 2; |
| } |
| |
| if (n_regs == 1) |
| push (file, regno); |
| else |
| fprintf (file, "\tstm.l\t%s-%s,@-sp\n", |
| h8_reg_names[regno], |
| h8_reg_names[regno + (n_regs - 1)]); |
| } |
| } |
| } |
| |
| /* Output assembly language code for the function epilogue. */ |
| |
| static void |
| h8300_output_function_epilogue (file, size) |
| FILE *file; |
| HOST_WIDE_INT size; |
| { |
| int fsize = round_frame_size (size); |
| int idx; |
| rtx insn = get_last_insn (); |
| int saved_regs; |
| int n_regs; |
| |
| if (os_task) |
| { |
| /* OS_Task epilogues are nearly naked -- they just have an |
| rts instruction. */ |
| fprintf (file, ";OS_task epilogue\n"); |
| fprintf (file, "\trts\n"); |
| goto out; |
| } |
| |
| /* Monitor epilogues are the same as interrupt function epilogues. |
| Just make a note that we're in an monitor epilogue. */ |
| if (monitor) |
| fprintf (file, ";monitor epilogue\n"); |
| |
| /* If the last insn was a BARRIER, we don't have to write any code. */ |
| if (GET_CODE (insn) == NOTE) |
| insn = prev_nonnote_insn (insn); |
| if (insn && GET_CODE (insn) == BARRIER) |
| goto out; |
| |
| /* Pop the saved registers in descending order. */ |
| saved_regs = compute_saved_regs (); |
| for (idx = 0; idx < FIRST_PSEUDO_REGISTER; idx += n_regs) |
| { |
| int regno = (FIRST_PSEUDO_REGISTER - 1) - idx; |
| |
| n_regs = 1; |
| if (saved_regs & (1 << regno)) |
| { |
| if (TARGET_H8300S) |
| { |
| /* See how many registers we can pop at the same time. */ |
| if ((regno == 7 || regno == 3) |
| && ((saved_regs >> (regno - 3)) & 0x0f) == 0x0f) |
| n_regs = 4; |
| |
| else if ((regno == 6 || regno == 2) |
| && ((saved_regs >> (regno - 2)) & 0x07) == 0x07) |
| n_regs = 3; |
| |
| else if ((regno == 7 || regno == 5 || regno == 3 || regno == 1) |
| && ((saved_regs >> (regno - 1)) & 0x03) == 0x03) |
| n_regs = 2; |
| } |
| |
| if (n_regs == 1) |
| pop (file, regno); |
| else |
| fprintf (file, "\tldm.l\t@sp+,%s-%s\n", |
| h8_reg_names[regno - (n_regs - 1)], |
| h8_reg_names[regno]); |
| } |
| } |
| |
| /* Deallocate locals. */ |
| dosize (file, "add", fsize); |
| |
| /* Pop frame pointer if we had one. */ |
| if (frame_pointer_needed) |
| pop (file, FRAME_POINTER_REGNUM); |
| |
| if (interrupt_handler) |
| fprintf (file, "\trte\n"); |
| else |
| fprintf (file, "\trts\n"); |
| |
| out: |
| interrupt_handler = 0; |
| os_task = 0; |
| monitor = 0; |
| pragma_saveall = 0; |
| } |
| |
| /* Output assembly code for the start of the file. */ |
| |
| void |
| asm_file_start (file) |
| FILE *file; |
| { |
| fprintf (file, ";\tGCC For the Hitachi H8/300\n"); |
| fprintf (file, ";\tBy Hitachi America Ltd and Cygnus Support\n"); |
| if (optimize) |
| fprintf (file, "; -O%d\n", optimize); |
| if (TARGET_H8300H) |
| fprintf (file, "\n\t.h8300h\n"); |
| else if (TARGET_H8300S) |
| fprintf (file, "\n\t.h8300s\n"); |
| else |
| fprintf (file, "\n\n"); |
| output_file_directive (file, main_input_filename); |
| } |
| |
| /* Output assembly language code for the end of file. */ |
| |
| void |
| asm_file_end (file) |
| FILE *file; |
| { |
| fprintf (file, "\t.end\n"); |
| } |
| |
| /* Return true if VALUE is a valid constant for constraint 'P'. |
| IE: VALUE is a power of two <= 2**15. */ |
| |
| int |
| small_power_of_two (value) |
| HOST_WIDE_INT value; |
| { |
| int power = exact_log2 (value); |
| return power >= 0 && power <= 15; |
| } |
| |
| /* Return true if VALUE is a valid constant for constraint 'O', which |
| means that the constant would be ok to use as a bit for a bclr |
| instruction. */ |
| |
| int |
| ok_for_bclr (value) |
| HOST_WIDE_INT value; |
| { |
| return small_power_of_two ((~value) & 0xff); |
| } |
| |
| /* Return true if OP is a valid source operand for an integer move |
| instruction. */ |
| |
| int |
| general_operand_src (op, mode) |
| rtx op; |
| enum machine_mode mode; |
| { |
| if (GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == POST_INC) |
| return 1; |
| return general_operand (op, mode); |
| } |
| |
| /* Return true if OP is a valid destination operand for an integer move |
| instruction. */ |
| |
| int |
| general_operand_dst (op, mode) |
| rtx op; |
| enum machine_mode mode; |
| { |
| if (GET_CODE (op) == MEM && GET_CODE (XEXP (op, 0)) == PRE_DEC) |
| return 1; |
| return general_operand (op, mode); |
| } |
| |
| /* Return true if OP is a const valid for a bit clear instruction. */ |
| |
| int |
| o_operand (operand, mode) |
| rtx operand; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| return (GET_CODE (operand) == CONST_INT |
| && CONST_OK_FOR_O (INTVAL (operand))); |
| } |
| |
| /* Return true if OP is a valid call operand. */ |
| |
| int |
| call_insn_operand (op, mode) |
| rtx op; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| if (GET_CODE (op) == MEM) |
| { |
| rtx inside = XEXP (op, 0); |
| if (register_operand (inside, Pmode)) |
| return 1; |
| if (CONSTANT_ADDRESS_P (inside)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* Return 1 if an addition/subtraction of a constant integer can be |
| transformed into two consecutive adds/subs that are faster than the |
| straightforward way. Otherwise, return 0. */ |
| |
| int |
| two_insn_adds_subs_operand (op, mode) |
| rtx op; |
| enum machine_mode mode; |
| { |
| if (GET_CODE (op) == CONST_INT) |
| { |
| HOST_WIDE_INT value = INTVAL (op); |
| |
| /* Force VALUE to be positive so that we do not have to consider |
| the negative case. */ |
| if (value < 0) |
| value = -value; |
| if (TARGET_H8300H || TARGET_H8300S) |
| { |
| /* A constant addition/subtraction takes 2 states in QImode, |
| 4 states in HImode, and 6 states in SImode. Thus, the |
| only case we can win is when SImode is used, in which |
| case, two adds/subs are used, taking 4 states. */ |
| if (mode == SImode |
| && (value == 2 + 1 |
| || value == 4 + 1 |
| || value == 4 + 2 |
| || value == 4 + 4)) |
| return 1; |
| } |
| else |
| { |
| /* We do not profit directly by splitting addition or |
| subtraction of 3 and 4. However, since these are |
| implemented as a sequence of adds or subs, they do not |
| clobber (cc0) unlike a sequence of add.b and add.x. */ |
| if (mode == HImode |
| && (value == 2 + 1 |
| || value == 2 + 2)) |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Split an add of a small constant into two adds/subs insns. */ |
| |
| void |
| split_adds_subs (mode, operands) |
| enum machine_mode mode; |
| rtx *operands; |
| { |
| HOST_WIDE_INT val = INTVAL (operands[1]); |
| rtx reg = operands[0]; |
| HOST_WIDE_INT sign = 1; |
| HOST_WIDE_INT amount; |
| |
| /* Force VAL to be positive so that we do not have to consider the |
| sign. */ |
| if (val < 0) |
| { |
| val = -val; |
| sign = -1; |
| } |
| |
| /* Try different amounts in descending order. */ |
| for (amount = (TARGET_H8300H || TARGET_H8300S) ? 4 : 2; |
| amount > 0; |
| amount /= 2) |
| { |
| for (; val >= amount; val -= amount) |
| { |
| rtx tmp = gen_rtx_PLUS (mode, reg, GEN_INT (sign * amount)); |
| emit_insn (gen_rtx_SET (VOIDmode, reg, tmp)); |
| } |
| } |
| |
| return; |
| } |
| |
| /* Return true if OP is a valid call operand, and OP represents |
| an operand for a small call (4 bytes instead of 6 bytes). */ |
| |
| int |
| small_call_insn_operand (op, mode) |
| rtx op; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| if (GET_CODE (op) == MEM) |
| { |
| rtx inside = XEXP (op, 0); |
| |
| /* Register indirect is a small call. */ |
| if (register_operand (inside, Pmode)) |
| return 1; |
| |
| /* A call through the function vector is a small |
| call too. */ |
| if (GET_CODE (inside) == SYMBOL_REF |
| && SYMBOL_REF_FLAG (inside)) |
| return 1; |
| } |
| /* Otherwise it's a large call. */ |
| return 0; |
| } |
| |
| /* Return true if OP is a valid jump operand. */ |
| |
| int |
| jump_address_operand (op, mode) |
| rtx op; |
| enum machine_mode mode; |
| { |
| if (GET_CODE (op) == REG) |
| return mode == Pmode; |
| |
| if (GET_CODE (op) == MEM) |
| { |
| rtx inside = XEXP (op, 0); |
| if (register_operand (inside, Pmode)) |
| return 1; |
| if (CONSTANT_ADDRESS_P (inside)) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* Recognize valid operands for bitfield instructions. */ |
| |
| extern int rtx_equal_function_value_matters; |
| |
| int |
| bit_operand (op, mode) |
| rtx op; |
| enum machine_mode mode; |
| { |
| /* We can except any general operand, expept that MEM operands must |
| be limited to those that use addresses valid for the 'U' constraint. */ |
| if (!general_operand (op, mode)) |
| return 0; |
| |
| /* Accept any mem during RTL generation. Otherwise, the code that does |
| insv and extzv will think that we can not handle memory. However, |
| to avoid reload problems, we only accept 'U' MEM operands after RTL |
| generation. This means that any named pattern which uses this predicate |
| must force its operands to match 'U' before emitting RTL. */ |
| |
| if (GET_CODE (op) == REG) |
| return 1; |
| if (GET_CODE (op) == SUBREG) |
| return 1; |
| if (!rtx_equal_function_value_matters) |
| /* We're building rtl. */ |
| return GET_CODE (op) == MEM; |
| else |
| return (GET_CODE (op) == MEM |
| && EXTRA_CONSTRAINT (op, 'U')); |
| } |
| |
| int |
| bit_memory_operand (op, mode) |
| rtx op; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| return (GET_CODE (op) == MEM |
| && EXTRA_CONSTRAINT (op, 'U')); |
| } |
| |
| /* Handle machine specific pragmas for compatibility with existing |
| compilers for the H8/300. |
| |
| pragma saveall generates prolog/epilog code which saves and |
| restores all the registers on function entry. |
| |
| pragma interrupt saves and restores all registers, and exits with |
| an rte instruction rather than an rts. A pointer to a function |
| with this attribute may be safely used in an interrupt vector. */ |
| |
| void |
| h8300_pr_interrupt (pfile) |
| cpp_reader *pfile ATTRIBUTE_UNUSED; |
| { |
| interrupt_handler = 1; |
| } |
| |
| void |
| h8300_pr_saveall (pfile) |
| cpp_reader *pfile ATTRIBUTE_UNUSED; |
| { |
| pragma_saveall = 1; |
| } |
| |
| /* If the next function argument with MODE and TYPE is to be passed in |
| a register, return a reg RTX for the hard register in which to pass |
| the argument. CUM represents the state after the last argument. |
| If the argument is to be pushed, NULL_RTX is returned. */ |
| |
| rtx |
| function_arg (cum, mode, type, named) |
| CUMULATIVE_ARGS *cum; |
| enum machine_mode mode; |
| tree type; |
| int named; |
| { |
| static const char *const hand_list[] = { |
| "__main", |
| "__cmpsi2", |
| "__divhi3", |
| "__modhi3", |
| "__udivhi3", |
| "__umodhi3", |
| "__divsi3", |
| "__modsi3", |
| "__udivsi3", |
| "__umodsi3", |
| "__mulhi3", |
| "__mulsi3", |
| "__reg_memcpy", |
| "__reg_memset", |
| "__ucmpsi2", |
| 0, |
| }; |
| |
| rtx result = NULL_RTX; |
| const char *fname; |
| int regpass = 0; |
| |
| /* Never pass unnamed arguments in registers. */ |
| if (!named) |
| return NULL_RTX; |
| |
| /* Pass 3 regs worth of data in regs when user asked on the command line. */ |
| if (TARGET_QUICKCALL) |
| regpass = 3; |
| |
| /* If calling hand written assembler, use 4 regs of args. */ |
| if (cum->libcall) |
| { |
| const char * const *p; |
| |
| fname = XSTR (cum->libcall, 0); |
| |
| /* See if this libcall is one of the hand coded ones. */ |
| for (p = hand_list; *p && strcmp (*p, fname) != 0; p++) |
| ; |
| |
| if (*p) |
| regpass = 4; |
| } |
| |
| if (regpass) |
| { |
| int size; |
| |
| if (mode == BLKmode) |
| size = int_size_in_bytes (type); |
| else |
| size = GET_MODE_SIZE (mode); |
| |
| if (size + cum->nbytes <= regpass * UNITS_PER_WORD |
| && cum->nbytes / UNITS_PER_WORD <= 3) |
| result = gen_rtx_REG (mode, cum->nbytes / UNITS_PER_WORD); |
| } |
| |
| return result; |
| } |
| |
| /* Return the cost of the rtx R with code CODE. */ |
| |
| int |
| const_costs (r, c, outer_code) |
| rtx r; |
| enum rtx_code c; |
| enum rtx_code outer_code; |
| { |
| switch (c) |
| { |
| case CONST_INT: |
| switch (INTVAL (r)) |
| { |
| case 0: |
| return 0; |
| case 1: |
| case 2: |
| case -1: |
| case -2: |
| return 0 + (outer_code == SET); |
| case 4: |
| case -4: |
| if (TARGET_H8300H || TARGET_H8300S) |
| return 0 + (outer_code == SET); |
| else |
| return 1; |
| default: |
| return 1; |
| } |
| |
| case CONST: |
| case LABEL_REF: |
| case SYMBOL_REF: |
| return 3; |
| |
| case CONST_DOUBLE: |
| return 20; |
| |
| default: |
| return 4; |
| } |
| } |
| |
| /* Documentation for the machine specific operand escapes: |
| |
| 'E' like s but negative. |
| 'F' like t but negative. |
| 'G' constant just the negative |
| 'R' print operand as a byte:8 address if appropriate, else fall back to |
| 'X' handling. |
| 'S' print operand as a long word |
| 'T' print operand as a word |
| 'V' find the set bit, and print its number. |
| 'W' find the clear bit, and print its number. |
| 'X' print operand as a byte |
| 'Y' print either l or h depending on whether last 'Z' operand < 8 or >= 8. |
| If this operand isn't a register, fall back to 'R' handling. |
| 'Z' print int & 7. |
| 'b' print the bit opcode |
| 'e' first word of 32 bit value - if reg, then least reg. if mem |
| then least. if const then most sig word |
| 'f' second word of 32 bit value - if reg, then biggest reg. if mem |
| then +2. if const then least sig word |
| 'j' print operand as condition code. |
| 'k' print operand as reverse condition code. |
| 's' print as low byte of 16 bit value |
| 't' print as high byte of 16 bit value |
| 'w' print as low byte of 32 bit value |
| 'x' print as 2nd byte of 32 bit value |
| 'y' print as 3rd byte of 32 bit value |
| 'z' print as msb of 32 bit value |
| */ |
| |
| /* Return assembly language string which identifies a comparison type. */ |
| |
| static const char * |
| cond_string (code) |
| enum rtx_code code; |
| { |
| switch (code) |
| { |
| case NE: |
| return "ne"; |
| case EQ: |
| return "eq"; |
| case GE: |
| return "ge"; |
| case GT: |
| return "gt"; |
| case LE: |
| return "le"; |
| case LT: |
| return "lt"; |
| case GEU: |
| return "hs"; |
| case GTU: |
| return "hi"; |
| case LEU: |
| return "ls"; |
| case LTU: |
| return "lo"; |
| default: |
| abort (); |
| } |
| } |
| |
| /* Print operand X using operand code CODE to assembly language output file |
| FILE. */ |
| |
| void |
| print_operand (file, x, code) |
| FILE *file; |
| rtx x; |
| int code; |
| { |
| /* This is used for communication between codes V,W,Z and Y. */ |
| static int bitint; |
| |
| switch (code) |
| { |
| case 'E': |
| switch (GET_CODE (x)) |
| { |
| case REG: |
| fprintf (file, "%sl", names_big[REGNO (x)]); |
| break; |
| case CONST_INT: |
| fprintf (file, "#%d", (-INTVAL (x)) & 0xff); |
| break; |
| default: |
| abort (); |
| } |
| break; |
| case 'F': |
| switch (GET_CODE (x)) |
| { |
| case REG: |
| fprintf (file, "%sh", names_big[REGNO (x)]); |
| break; |
| case CONST_INT: |
| fprintf (file, "#%d", ((-INTVAL (x)) & 0xff00) >> 8); |
| break; |
| default: |
| abort (); |
| } |
| break; |
| case 'G': |
| if (GET_CODE (x) != CONST_INT) |
| abort (); |
| fprintf (file, "#%d", 0xff & (-INTVAL (x))); |
| break; |
| case 'S': |
| if (GET_CODE (x) == REG) |
| fprintf (file, "%s", names_extended[REGNO (x)]); |
| else |
| goto def; |
| break; |
| case 'T': |
| if (GET_CODE (x) == REG) |
| fprintf (file, "%s", names_big[REGNO (x)]); |
| else |
| goto def; |
| break; |
| case 'V': |
| bitint = exact_log2 (INTVAL (x)); |
| if (bitint == -1) |
| abort (); |
| fprintf (file, "#%d", bitint & 7); |
| break; |
| case 'W': |
| bitint = exact_log2 ((~INTVAL (x)) & 0xff); |
| if (bitint == -1) |
| abort (); |
| fprintf (file, "#%d", bitint & 7); |
| break; |
| case 'R': |
| case 'X': |
| if (GET_CODE (x) == REG) |
| fprintf (file, "%s", byte_reg (x, 0)); |
| else |
| goto def; |
| break; |
| case 'Y': |
| if (bitint == -1) |
| abort (); |
| if (GET_CODE (x) == REG) |
| fprintf (file, "%s%c", names_big[REGNO (x)], bitint > 7 ? 'h' : 'l'); |
| else |
| print_operand (file, x, 'R'); |
| bitint = -1; |
| break; |
| case 'Z': |
| bitint = INTVAL (x); |
| fprintf (file, "#%d", bitint & 7); |
| break; |
| case 'b': |
| switch (GET_CODE (x)) |
| { |
| case IOR: |
| fprintf (file, "bor"); |
| break; |
| case XOR: |
| fprintf (file, "bxor"); |
| break; |
| case AND: |
| fprintf (file, "band"); |
| break; |
| default: |
| break; |
| } |
| break; |
| case 'e': |
| switch (GET_CODE (x)) |
| { |
| case REG: |
| if (TARGET_H8300) |
| fprintf (file, "%s", names_big[REGNO (x)]); |
| else |
| fprintf (file, "%s", names_upper_extended[REGNO (x)]); |
| break; |
| case MEM: |
| print_operand (file, x, 0); |
| break; |
| case CONST_INT: |
| fprintf (file, "#%d", ((INTVAL (x) >> 16) & 0xffff)); |
| break; |
| case CONST_DOUBLE: |
| { |
| long val; |
| REAL_VALUE_TYPE rv; |
| REAL_VALUE_FROM_CONST_DOUBLE (rv, x); |
| REAL_VALUE_TO_TARGET_SINGLE (rv, val); |
| fprintf (file, "#%ld", ((val >> 16) & 0xffff)); |
| break; |
| } |
| default: |
| abort (); |
| break; |
| } |
| break; |
| case 'f': |
| switch (GET_CODE (x)) |
| { |
| case REG: |
| if (TARGET_H8300) |
| fprintf (file, "%s", names_big[REGNO (x) + 1]); |
| else |
| fprintf (file, "%s", names_big[REGNO (x)]); |
| break; |
| case MEM: |
| x = adjust_address (x, HImode, 2); |
| print_operand (file, x, 0); |
| break; |
| case CONST_INT: |
| fprintf (file, "#%d", INTVAL (x) & 0xffff); |
| break; |
| case CONST_DOUBLE: |
| { |
| long val; |
| REAL_VALUE_TYPE rv; |
| REAL_VALUE_FROM_CONST_DOUBLE (rv, x); |
| REAL_VALUE_TO_TARGET_SINGLE (rv, val); |
| fprintf (file, "#%ld", (val & 0xffff)); |
| break; |
| } |
| default: |
| abort (); |
| } |
| break; |
| case 'j': |
| asm_fprintf (file, cond_string (GET_CODE (x))); |
| break; |
| case 'k': |
| asm_fprintf (file, cond_string (reverse_condition (GET_CODE (x)))); |
| break; |
| case 's': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", (INTVAL (x)) & 0xff); |
| else |
| fprintf (file, "%s", byte_reg (x, 0)); |
| break; |
| case 't': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", (INTVAL (x) >> 8) & 0xff); |
| else |
| fprintf (file, "%s", byte_reg (x, 1)); |
| break; |
| case 'u': |
| if (GET_CODE (x) != CONST_INT) |
| abort (); |
| fprintf (file, "%d", INTVAL (x)); |
| break; |
| case 'w': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", INTVAL (x) & 0xff); |
| else |
| fprintf (file, "%s", |
| byte_reg (x, TARGET_H8300 ? 2 : 0)); |
| break; |
| case 'x': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", (INTVAL (x) >> 8) & 0xff); |
| else |
| fprintf (file, "%s", |
| byte_reg (x, TARGET_H8300 ? 3 : 1)); |
| break; |
| case 'y': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", (INTVAL (x) >> 16) & 0xff); |
| else |
| fprintf (file, "%s", byte_reg (x, 0)); |
| break; |
| case 'z': |
| if (GET_CODE (x) == CONST_INT) |
| fprintf (file, "#%d", (INTVAL (x) >> 24) & 0xff); |
| else |
| fprintf (file, "%s", byte_reg (x, 1)); |
| break; |
| |
| default: |
| def: |
| switch (GET_CODE (x)) |
| { |
| case REG: |
| switch (GET_MODE (x)) |
| { |
| case QImode: |
| #if 0 /* Is it asm ("mov.b %0,r2l", ...) */ |
| fprintf (file, "%s", byte_reg (x, 0)); |
| #else /* ... or is it asm ("mov.b %0l,r2l", ...) */ |
| fprintf (file, "%s", names_big[REGNO (x)]); |
| #endif |
| break; |
| case HImode: |
| fprintf (file, "%s", names_big[REGNO (x)]); |
| break; |
| case SImode: |
| case SFmode: |
| fprintf (file, "%s", names_extended[REGNO (x)]); |
| break; |
| default: |
| abort (); |
| } |
| break; |
| |
| case MEM: |
| { |
| rtx addr = XEXP (x, 0); |
| int eightbit_ok = ((GET_CODE (addr) == SYMBOL_REF |
| && SYMBOL_REF_FLAG (addr)) |
| || EIGHTBIT_CONSTANT_ADDRESS_P (addr)); |
| int tiny_ok = ((GET_CODE (addr) == SYMBOL_REF |
| && TINY_DATA_NAME_P (XSTR (addr, 0))) |
| || TINY_CONSTANT_ADDRESS_P (addr)); |
| |
| fprintf (file, "@"); |
| output_address (addr); |
| |
| /* We fall back from smaller addressing to larger |
| addressing in various ways depending on CODE. */ |
| switch (code) |
| { |
| case 'R': |
| /* Used for mov.b and bit operations. */ |
| if (eightbit_ok) |
| { |
| fprintf (file, ":8"); |
| break; |
| } |
| |
| /* Fall through. We should not get here if we are |
| processing bit operations on H8/300 or H8/300H |
| because 'U' constraint does not allow bit |
| operations on the tiny area on these machines. */ |
| |
| case 'T': |
| case 'S': |
| /* Used for mov.w and mov.l. */ |
| if (tiny_ok) |
| fprintf (file, ":16"); |
| break; |
| default: |
| break; |
| } |
| } |
| break; |
| |
| case CONST_INT: |
| case SYMBOL_REF: |
| case CONST: |
| case LABEL_REF: |
| fprintf (file, "#"); |
| print_operand_address (file, x); |
| break; |
| case CONST_DOUBLE: |
| { |
| long val; |
| REAL_VALUE_TYPE rv; |
| REAL_VALUE_FROM_CONST_DOUBLE (rv, x); |
| REAL_VALUE_TO_TARGET_SINGLE (rv, val); |
| fprintf (file, "#%ld", val); |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| } |
| |
| /* Output assembly language output for the address ADDR to FILE. */ |
| |
| void |
| print_operand_address (file, addr) |
| FILE *file; |
| rtx addr; |
| { |
| switch (GET_CODE (addr)) |
| { |
| case REG: |
| fprintf (file, "%s", h8_reg_names[REGNO (addr)]); |
| break; |
| |
| case PRE_DEC: |
| fprintf (file, "-%s", h8_reg_names[REGNO (XEXP (addr, 0))]); |
| break; |
| |
| case POST_INC: |
| fprintf (file, "%s+", h8_reg_names[REGNO (XEXP (addr, 0))]); |
| break; |
| |
| case PLUS: |
| fprintf (file, "("); |
| if (GET_CODE (XEXP (addr, 0)) == REG) |
| { |
| /* reg,foo */ |
| print_operand_address (file, XEXP (addr, 1)); |
| fprintf (file, ","); |
| print_operand_address (file, XEXP (addr, 0)); |
| } |
| else |
| { |
| /* foo+k */ |
| print_operand_address (file, XEXP (addr, 0)); |
| fprintf (file, "+"); |
| print_operand_address (file, XEXP (addr, 1)); |
| } |
| fprintf (file, ")"); |
| break; |
| |
| case CONST_INT: |
| { |
| /* Since the H8/300 only has 16 bit pointers, negative values are also |
| those >= 32768. This happens for example with pointer minus a |
| constant. We don't want to turn (char *p - 2) into |
| (char *p + 65534) because loop unrolling can build upon this |
| (IE: char *p + 131068). */ |
| int n = INTVAL (addr); |
| if (TARGET_H8300) |
| n = (int) (short) n; |
| if (n < 0) |
| /* ??? Why the special case for -ve values? */ |
| fprintf (file, "-%d", -n); |
| else |
| fprintf (file, "%d", n); |
| break; |
| } |
| |
| default: |
| output_addr_const (file, addr); |
| break; |
| } |
| } |
| |
| /* Output all insn addresses and their sizes into the assembly language |
| output file. This is helpful for debugging whether the length attributes |
| in the md file are correct. This is not meant to be a user selectable |
| option. */ |
| |
| void |
| final_prescan_insn (insn, operand, num_operands) |
| rtx insn, *operand ATTRIBUTE_UNUSED; |
| int num_operands ATTRIBUTE_UNUSED; |
| { |
| /* This holds the last insn address. */ |
| static int last_insn_address = 0; |
| |
| int uid = INSN_UID (insn); |
| |
| if (TARGET_RTL_DUMP) |
| { |
| fprintf (asm_out_file, "\n****************"); |
| print_rtl (asm_out_file, PATTERN (insn)); |
| fprintf (asm_out_file, "\n"); |
| } |
| |
| if (TARGET_ADDRESSES) |
| { |
| fprintf (asm_out_file, "; 0x%x %d\n", INSN_ADDRESSES (uid), |
| INSN_ADDRESSES (uid) - last_insn_address); |
| last_insn_address = INSN_ADDRESSES (uid); |
| } |
| } |
| |
| /* Prepare for an SI sized move. */ |
| |
| int |
| do_movsi (operands) |
| rtx operands[]; |
| { |
| rtx src = operands[1]; |
| rtx dst = operands[0]; |
| if (!reload_in_progress && !reload_completed) |
| { |
| if (!register_operand (dst, GET_MODE (dst))) |
| { |
| rtx tmp = gen_reg_rtx (GET_MODE (dst)); |
| emit_move_insn (tmp, src); |
| operands[1] = tmp; |
| } |
| } |
| return 0; |
| } |
| |
| /* Function for INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET). |
| Define the offset between two registers, one to be eliminated, and |
| the other its replacement, at the start of a routine. */ |
| |
| int |
| initial_offset (from, to) |
| int from, to; |
| { |
| int offset = 0; |
| |
| if (from == ARG_POINTER_REGNUM && to == FRAME_POINTER_REGNUM) |
| offset = UNITS_PER_WORD + frame_pointer_needed * UNITS_PER_WORD; |
| else if (from == RETURN_ADDRESS_POINTER_REGNUM && to == FRAME_POINTER_REGNUM) |
| offset = frame_pointer_needed * UNITS_PER_WORD; |
| else |
| { |
| int regno; |
| |
| for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) |
| if (WORD_REG_USED (regno)) |
| offset += UNITS_PER_WORD; |
| |
| /* See the comments for get_frame_size. We need to round it up to |
| STACK_BOUNDARY. */ |
| |
| offset += ((get_frame_size () + STACK_BOUNDARY / BITS_PER_UNIT - 1) |
| & ~(STACK_BOUNDARY / BITS_PER_UNIT - 1)); |
| |
| if (from == ARG_POINTER_REGNUM && to == STACK_POINTER_REGNUM) |
| offset += UNITS_PER_WORD; /* Skip saved PC */ |
| } |
| return offset; |
| } |
| |
| rtx |
| h8300_return_addr_rtx (count, frame) |
| int count; |
| rtx frame; |
| { |
| rtx ret; |
| |
| if (count == 0) |
| ret = gen_rtx_MEM (Pmode, |
| gen_rtx_REG (Pmode, RETURN_ADDRESS_POINTER_REGNUM)); |
| else if (flag_omit_frame_pointer) |
| return (rtx) 0; |
| else |
| ret = gen_rtx_MEM (Pmode, |
| memory_address (Pmode, |
| plus_constant (frame, UNITS_PER_WORD))); |
| set_mem_alias_set (ret, get_frame_alias_set ()); |
| return ret; |
| } |
| |
| /* Update the condition code from the insn. */ |
| |
| void |
| notice_update_cc (body, insn) |
| rtx body; |
| rtx insn; |
| { |
| switch (get_attr_cc (insn)) |
| { |
| case CC_NONE: |
| /* Insn does not affect CC at all. */ |
| break; |
| |
| case CC_NONE_0HIT: |
| /* Insn does not change CC, but the 0'th operand has been changed. */ |
| if (cc_status.value1 != 0 |
| && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value1)) |
| cc_status.value1 = 0; |
| if (cc_status.value2 != 0 |
| && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value2)) |
| cc_status.value2 = 0; |
| break; |
| |
| case CC_SET_ZN: |
| /* Insn sets the Z,N flags of CC to recog_data.operand[0]. |
| The V flag is unusable. The C flag may or may not be known but |
| that's ok because alter_cond will change tests to use EQ/NE. */ |
| CC_STATUS_INIT; |
| cc_status.flags |= CC_OVERFLOW_UNUSABLE | CC_NO_CARRY; |
| cc_status.value1 = recog_data.operand[0]; |
| break; |
| |
| case CC_SET_ZNV: |
| /* Insn sets the Z,N,V flags of CC to recog_data.operand[0]. |
| The C flag may or may not be known but that's ok because |
| alter_cond will change tests to use EQ/NE. */ |
| CC_STATUS_INIT; |
| cc_status.flags |= CC_NO_CARRY; |
| cc_status.value1 = recog_data.operand[0]; |
| if (GET_CODE (body) == SET && REG_P (SET_SRC (body))) |
| cc_status.value2 = SET_SRC (body); |
| break; |
| |
| case CC_COMPARE: |
| /* The insn is a compare instruction. */ |
| CC_STATUS_INIT; |
| cc_status.value1 = SET_SRC (body); |
| break; |
| |
| case CC_CLOBBER: |
| /* Insn doesn't leave CC in a usable state. */ |
| CC_STATUS_INIT; |
| break; |
| } |
| } |
| |
| /* Recognize valid operators for bit instructions. */ |
| |
| int |
| bit_operator (x, mode) |
| rtx x; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| enum rtx_code code = GET_CODE (x); |
| |
| return (code == XOR |
| || code == AND |
| || code == IOR); |
| } |
| |
| const char * |
| output_logical_op (mode, operands) |
| enum machine_mode mode; |
| rtx *operands; |
| { |
| /* Figure out the logical op that we need to perform. */ |
| enum rtx_code code = GET_CODE (operands[3]); |
| /* Pretend that every byte is affected if both operands are registers. */ |
| unsigned HOST_WIDE_INT intval = |
| (unsigned HOST_WIDE_INT) ((GET_CODE (operands[2]) == CONST_INT) |
| ? INTVAL (operands[2]) : 0x55555555); |
| /* The determinant of the algorithm. If we perform an AND, 0 |
| affects a bit. Otherwise, 1 affects a bit. */ |
| unsigned HOST_WIDE_INT det = (code != AND) ? intval : ~intval; |
| /* The name of an insn. */ |
| const char *opname; |
| char insn_buf[100]; |
| |
| switch (code) |
| { |
| case AND: |
| opname = "and"; |
| break; |
| case IOR: |
| opname = "or"; |
| break; |
| case XOR: |
| opname = "xor"; |
| break; |
| default: |
| abort (); |
| } |
| |
| switch (mode) |
| { |
| case HImode: |
| /* First, see if we can finish with one insn. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x00ff) != 0) |
| && ((det & 0xff00) != 0)) |
| { |
| sprintf (insn_buf, "%s.w\t%%T2,%%T0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| else |
| { |
| /* Take care of the lower byte. */ |
| if ((det & 0x00ff) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%s2,%%s0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| /* Take care of the upper byte. */ |
| if ((det & 0xff00) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%t2,%%t0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| } |
| break; |
| case SImode: |
| /* First, see if we can finish with one insn. |
| |
| If code is either AND or XOR, we exclude two special cases, |
| 0xffffff00 and 0xffff00ff, because insns like sub.w or not.w |
| can do a better job. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x0000ffff) != 0) |
| && ((det & 0xffff0000) != 0) |
| && (code == IOR || det != 0xffffff00) |
| && (code == IOR || det != 0xffff00ff)) |
| { |
| sprintf (insn_buf, "%s.l\t%%S2,%%S0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| else |
| { |
| /* Take care of the lower and upper words individually. For |
| each word, we try different methods in the order of |
| |
| 1) the special insn (in case of AND or XOR), |
| 2) the word-wise insn, and |
| 3) The byte-wise insn. */ |
| if ((det & 0x0000ffff) == 0x0000ffff |
| && (TARGET_H8300 ? (code == AND) : (code != IOR))) |
| output_asm_insn ((code == AND) |
| ? "sub.w\t%f0,%f0" : "not.w\t%f0", |
| operands); |
| else if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x000000ff) != 0) |
| && ((det & 0x0000ff00) != 0)) |
| { |
| sprintf (insn_buf, "%s.w\t%%f2,%%f0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| else |
| { |
| if ((det & 0x000000ff) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%w2,%%w0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| if ((det & 0x0000ff00) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%x2,%%x0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| } |
| |
| if ((det & 0xffff0000) == 0xffff0000 |
| && (TARGET_H8300 ? (code == AND) : (code != IOR))) |
| output_asm_insn ((code == AND) |
| ? "sub.w\t%e0,%e0" : "not.w\t%e0", |
| operands); |
| else if (TARGET_H8300H || TARGET_H8300S) |
| { |
| if ((det & 0xffff0000) != 0) |
| { |
| sprintf (insn_buf, "%s.w\t%%e2,%%e0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| } |
| else |
| { |
| if ((det & 0x00ff0000) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%y2,%%y0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| if ((det & 0xff000000) != 0) |
| { |
| sprintf (insn_buf, "%s\t%%z2,%%z0", opname); |
| output_asm_insn (insn_buf, operands); |
| } |
| } |
| } |
| break; |
| default: |
| abort (); |
| } |
| return ""; |
| } |
| |
| unsigned int |
| compute_logical_op_length (mode, operands) |
| enum machine_mode mode; |
| rtx *operands; |
| { |
| /* Figure out the logical op that we need to perform. */ |
| enum rtx_code code = GET_CODE (operands[3]); |
| /* Pretend that every byte is affected if both operands are registers. */ |
| unsigned HOST_WIDE_INT intval = |
| (unsigned HOST_WIDE_INT) ((GET_CODE (operands[2]) == CONST_INT) |
| ? INTVAL (operands[2]) : 0x55555555); |
| /* The determinant of the algorithm. If we perform an AND, 0 |
| affects a bit. Otherwise, 1 affects a bit. */ |
| unsigned HOST_WIDE_INT det = (code != AND) ? intval : ~intval; |
| /* Insn length. */ |
| unsigned int length = 0; |
| |
| switch (mode) |
| { |
| case HImode: |
| /* First, see if we can finish with one insn. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x00ff) != 0) |
| && ((det & 0xff00) != 0)) |
| { |
| if (REG_P (operands[2])) |
| length += 2; |
| else |
| length += 4; |
| } |
| else |
| { |
| /* Take care of the lower byte. */ |
| if ((det & 0x00ff) != 0) |
| length += 2; |
| |
| /* Take care of the upper byte. */ |
| if ((det & 0xff00) != 0) |
| length += 2; |
| } |
| break; |
| case SImode: |
| /* First, see if we can finish with one insn. |
| |
| If code is either AND or XOR, we exclude two special cases, |
| 0xffffff00 and 0xffff00ff, because insns like sub.w or not.w |
| can do a better job. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x0000ffff) != 0) |
| && ((det & 0xffff0000) != 0) |
| && (code == IOR || det != 0xffffff00) |
| && (code == IOR || det != 0xffff00ff)) |
| { |
| if (REG_P (operands[2])) |
| length += 4; |
| else |
| length += 6; |
| } |
| else |
| { |
| /* Take care of the lower and upper words individually. For |
| each word, we try different methods in the order of |
| |
| 1) the special insn (in case of AND or XOR), |
| 2) the word-wise insn, and |
| 3) The byte-wise insn. */ |
| if ((det & 0x0000ffff) == 0x0000ffff |
| && (TARGET_H8300 ? (code == AND) : (code != IOR))) |
| { |
| length += 2; |
| } |
| else if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x000000ff) != 0) |
| && ((det & 0x0000ff00) != 0)) |
| { |
| length += 4; |
| } |
| else |
| { |
| if ((det & 0x000000ff) != 0) |
| length += 2; |
| |
| if ((det & 0x0000ff00) != 0) |
| length += 2; |
| } |
| |
| if ((det & 0xffff0000) == 0xffff0000 |
| && (TARGET_H8300 ? (code == AND) : (code != IOR))) |
| { |
| length += 2; |
| } |
| else if (TARGET_H8300H || TARGET_H8300S) |
| { |
| if ((det & 0xffff0000) != 0) |
| length += 4; |
| } |
| else |
| { |
| if ((det & 0x00ff0000) != 0) |
| length += 2; |
| |
| if ((det & 0xff000000) != 0) |
| length += 2; |
| } |
| } |
| break; |
| default: |
| abort (); |
| } |
| return length; |
| } |
| |
| int |
| compute_logical_op_cc (mode, operands) |
| enum machine_mode mode; |
| rtx *operands; |
| { |
| /* Figure out the logical op that we need to perform. */ |
| enum rtx_code code = GET_CODE (operands[3]); |
| /* Pretend that every byte is affected if both operands are registers. */ |
| unsigned HOST_WIDE_INT intval = |
| (unsigned HOST_WIDE_INT) ((GET_CODE (operands[2]) == CONST_INT) |
| ? INTVAL (operands[2]) : 0x55555555); |
| /* The determinant of the algorithm. If we perform an AND, 0 |
| affects a bit. Otherwise, 1 affects a bit. */ |
| unsigned HOST_WIDE_INT det = (code != AND) ? intval : ~intval; |
| /* Condition code. */ |
| enum attr_cc cc = CC_CLOBBER; |
| |
| switch (mode) |
| { |
| case HImode: |
| /* First, see if we can finish with one insn. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x00ff) != 0) |
| && ((det & 0xff00) != 0)) |
| { |
| cc = CC_SET_ZNV; |
| } |
| break; |
| case SImode: |
| /* First, see if we can finish with one insn. |
| |
| If code is either AND or XOR, we exclude two special cases, |
| 0xffffff00 and 0xffff00ff, because insns like sub.w or not.w |
| can do a better job. */ |
| if ((TARGET_H8300H || TARGET_H8300S) |
| && ((det & 0x0000ffff) != 0) |
| && ((det & 0xffff0000) != 0) |
| && (code == IOR || det != 0xffffff00) |
| && (code == IOR || det != 0xffff00ff)) |
| { |
| cc = CC_SET_ZNV; |
| } |
| break; |
| default: |
| abort (); |
| } |
| return cc; |
| } |
| |
| /* Shifts. |
| |
| We devote a fair bit of code to getting efficient shifts since we |
| can only shift one bit at a time on the H8/300 and H8/300H and only |
| one or two bits at a time on the H8/S. |
| |
| All shift code falls into one of the following ways of |
| implementation: |
| |
| o SHIFT_INLINE: Emit straight line code for the shift; this is used |
| when a straight line shift is about the same size or smaller than |
| a loop. |
| |
| o SHIFT_ROT_AND: Rotate the value the opposite direction, then mask |
| off the bits we don't need. This is used when only a few of the |
| bits in the original value will survive in the shifted value. |
| |
| o SHIFT_SPECIAL: Often it's possible to move a byte or a word to |
| simulate a shift by 8, 16, or 24 bits. Once moved, a few inline |
| shifts can be added if the shift count is slightly more than 8 or |
| 16. This case also includes other oddballs that are not worth |
| explaning here. |
| |
| o SHIFT_LOOP: Emit a loop using one (or two on H8/S) bit shifts. |
| |
| Here are some thoughts on what the absolutely positively best code |
| is. "Best" here means some rational trade-off between code size |
| and speed, where speed is more preferred but not at the expense of |
| generating 20 insns. |
| |
| Below, a trailing '*' after the shift count indicates the "best" |
| mode isn't implemented. We only describe SHIFT_SPECIAL cases to |
| simplify the table. For other cases, refer to shift_alg_[qhs]i. |
| |
| H8/300 QImode shifts |
| 7 - ASHIFTRT: shll, subx (propagate carry bit to all bits) |
| |
| H8/300 HImode shifts |
| 7 - shift 2nd half other way into carry. |
| copy 1st half into 2nd half |
| rotate 2nd half other way with carry |
| rotate 1st half other way (no carry) |
| mask off bits in 1st half (ASHIFT | LSHIFTRT). |
| sign extend 1st half (ASHIFTRT) |
| 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) |
| 9-12 - do shift by 8, inline remaining shifts |
| 15 - ASHIFTRT: shll, subx, set other byte |
| |
| H8/300 SImode shifts |
| 7* - shift other way once, move bytes into place, |
| move carry into place (possibly with sign extension) |
| 8 - move bytes into place, zero or sign extend other |
| 15* - shift other way once, move word into place, move carry into place |
| 16 - move word, zero or sign extend other |
| 24* - move bytes into place, zero or sign extend other |
| 31 - ASHIFTRT: shll top byte, subx, copy to other bytes |
| |
| H8/300H QImode shifts (same as H8/300 QImode shifts) |
| 7 - ASHIFTRT: shll, subx (propagate carry bit to all bits) |
| |
| H8/300H HImode shifts |
| 7 - shift 2nd half other way into carry. |
| copy 1st half into 2nd half |
| rotate entire word other way using carry |
| mask off remaining bits (ASHIFT | LSHIFTRT) |
| sign extend remaining bits (ASHIFTRT) |
| 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) |
| 9-12 - do shift by 8, inline remaining shifts |
| 15 - ASHIFTRT: shll, subx, set other byte |
| |
| H8/300H SImode shifts |
| (These are complicated by the fact that we don't have byte level access to |
| the top word.) |
| A word is: bytes 3,2,1,0 (msb -> lsb), word 1,0 (msw -> lsw) |
| 15* - shift other way once, move word into place, move carry into place |
| (with sign extension for ASHIFTRT) |
| 16 - move word into place, zero or sign extend other |
| 17-20 - do 16bit shift, then inline remaining shifts |
| 24* - ASHIFT: move byte 0(msb) to byte 1, zero byte 0, |
| move word 0 to word 1, zero word 0 |
| LSHIFTRT: move word 1 to word 0, move byte 1 to byte 0, |
| zero word 1, zero byte 1 |
| ASHIFTRT: move word 1 to word 0, move byte 1 to byte 0, |
| sign extend byte 0, sign extend word 0 |
| 25-27* - either loop, or |
| do 24 bit shift, inline rest |
| 31 - shll, subx byte 0, sign extend byte 0, sign extend word 0 |
| |
| H8/S QImode shifts |
| 7 - ASHIFTRT: shll, subx (propagate carry bit to all bits) |
| |
| H8/S HImode shifts |
| 8 - move byte, zero (ASHIFT | LSHIFTRT) or sign extend other (ASHIFTRT) |
| 9-12 - do shift by 8, inline remaining shifts |
| 15 - ASHIFTRT: shll, subx, set other byte |
| |
| H8/S SImode shifts |
| (These are complicated by the fact that we don't have byte level access to |
| the top word.) |
| A word is: bytes 3,2,1,0 (msb -> lsb), word 1,0 (msw -> lsw) |
| 15* - shift other way once, move word into place, move carry into place |
| (with sign extension for ASHIFTRT) |
| 16 - move word into place, zero or sign extend other |
| 17-20 - do 16bit shift, then inline remaining shifts |
| 24* - ASHIFT: move byte 0(msb) to byte 1, zero byte 0, |
| move word 0 to word 1, zero word 0 |
| LSHIFTRT: move word 1 to word 0, move byte 1 to byte 0, |
| zero word 1, zero byte 1 |
| ASHIFTRT: move word 1 to word 0, move byte 1 to byte 0, |
| sign extend byte 0, sign extend word 0 |
| 25-27* - either loop, or |
| do 24 bit shift, inline rest |
| 31 - shll, subx byte 0, sign extend byte 0, sign extend word 0 |
| |
| Panic!!! */ |
| |
| int |
| nshift_operator (x, mode) |
| rtx x; |
| enum machine_mode mode ATTRIBUTE_UNUSED; |
| { |
| switch (GET_CODE (x)) |
| { |
| case ASHIFTRT: |
| case LSHIFTRT: |
| case ASHIFT: |
| return 1; |
| |
| default: |
| return 0; |
| } |
| } |
| |
| /* Called from the .md file to emit code to do shifts. |
| Return a boolean indicating success. |
| (Currently this is always TRUE). */ |
| |
| int |
| expand_a_shift (mode, code, operands) |
| enum machine_mode mode; |
| int code; |
| rtx operands[]; |
| { |
| emit_move_insn (operands[0], operands[1]); |
| |
| /* Need a loop to get all the bits we want - we generate the |
| code at emit time, but need to allocate a scratch reg now. */ |
| |
| emit_insn (gen_rtx_PARALLEL |
| (VOIDmode, |
| gen_rtvec (2, |
| gen_rtx_SET (VOIDmode, operands[0], |
| gen_rtx (code, mode, operands[0], |
| operands[2])), |
| gen_rtx_CLOBBER (VOIDmode, |
| gen_rtx_SCRATCH (QImode))))); |
| |
| return 1; |
| } |
| |
| /* See above for explanation of this enum. */ |
| |
| enum shift_alg |
| { |
| SHIFT_INLINE, |
| SHIFT_ROT_AND, |
| SHIFT_SPECIAL, |
| SHIFT_LOOP |
| }; |
| |
| /* Symbols of the various shifts which can be used as indices. */ |
| |
| enum shift_type |
| { |
| SHIFT_ASHIFT, SHIFT_LSHIFTRT, SHIFT_ASHIFTRT |
| }; |
| |
| /* Symbols of the various modes which can be used as indices. */ |
| |
| enum shift_mode |
| { |
| QIshift, HIshift, SIshift |
| }; |
| |
| /* For single bit shift insns, record assembler and what bits of the |
| condition code are valid afterwards (represented as various CC_FOO |
| bits, 0 means CC isn't left in a usable state). */ |
| |
| struct shift_insn |
| { |
| const char *const assembler; |
| const int cc_valid; |
| }; |
| |
| /* Assembler instruction shift table. |
| |
| These tables are used to look up the basic shifts. |
| They are indexed by cpu, shift_type, and mode. */ |
| |
| static const struct shift_insn shift_one[2][3][3] = |
| { |
| /* H8/300 */ |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| { "shll\t%X0", CC_NO_CARRY }, |
| { "add.w\t%T0,%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "add.w\t%f0,%f0\n\taddx\t%y0,%y0\n\taddx\t%z0,%z0", 0 } |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| { "shlr\t%X0", CC_NO_CARRY }, |
| { "shlr\t%t0\n\trotxr\t%s0", 0 }, |
| { "shlr\t%z0\n\trotxr\t%y0\n\trotxr\t%x0\n\trotxr\t%w0", 0 } |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| { "shar\t%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "shar\t%t0\n\trotxr\t%s0", 0 }, |
| { "shar\t%z0\n\trotxr\t%y0\n\trotxr\t%x0\n\trotxr\t%w0", 0 } |
| } |
| }, |
| /* H8/300H */ |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| { "shll.b\t%X0", CC_NO_CARRY }, |
| { "shll.w\t%T0", CC_NO_CARRY }, |
| { "shll.l\t%S0", CC_NO_CARRY } |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| { "shlr.b\t%X0", CC_NO_CARRY }, |
| { "shlr.w\t%T0", CC_NO_CARRY }, |
| { "shlr.l\t%S0", CC_NO_CARRY } |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| { "shar.b\t%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "shar.w\t%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "shar.l\t%S0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY } |
| } |
| } |
| }; |
| |
| static const struct shift_insn shift_two[3][3] = |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| { "shll.b\t#2,%X0", CC_NO_CARRY }, |
| { "shll.w\t#2,%T0", CC_NO_CARRY }, |
| { "shll.l\t#2,%S0", CC_NO_CARRY } |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| { "shlr.b\t#2,%X0", CC_NO_CARRY }, |
| { "shlr.w\t#2,%T0", CC_NO_CARRY }, |
| { "shlr.l\t#2,%S0", CC_NO_CARRY } |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| { "shar.b\t#2,%X0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "shar.w\t#2,%T0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY }, |
| { "shar.l\t#2,%S0", CC_OVERFLOW_UNUSABLE | CC_NO_CARRY } |
| } |
| }; |
| |
| /* Rotates are organized by which shift they'll be used in implementing. |
| There's no need to record whether the cc is valid afterwards because |
| it is the AND insn that will decide this. */ |
| |
| static const char *const rotate_one[2][3][3] = |
| { |
| /* H8/300 */ |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| "rotr\t%X0", |
| "shlr\t%t0\n\trotxr\t%s0\n\tbst\t#7,%t0", |
| 0 |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| "rotl\t%X0", |
| "shll\t%s0\n\trotxl\t%t0\n\tbst\t#0,%s0", |
| 0 |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| "rotl\t%X0", |
| "shll\t%s0\n\trotxl\t%t0\n\tbst\t#0,%s0", |
| 0 |
| } |
| }, |
| /* H8/300H */ |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| "rotr.b\t%X0", |
| "rotr.w\t%T0", |
| "rotr.l\t%S0" |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| "rotl.b\t%X0", |
| "rotl.w\t%T0", |
| "rotl.l\t%S0" |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| "rotl.b\t%X0", |
| "rotl.w\t%T0", |
| "rotl.l\t%S0" |
| } |
| } |
| }; |
| |
| static const char *const rotate_two[3][3] = |
| { |
| /* SHIFT_ASHIFT */ |
| { |
| "rotr.b\t#2,%X0", |
| "rotr.w\t#2,%T0", |
| "rotr.l\t#2,%S0" |
| }, |
| /* SHIFT_LSHIFTRT */ |
| { |
| "rotl.b\t#2,%X0", |
| "rotl.w\t#2,%T0", |
| "rotl.l\t#2,%S0" |
| }, |
| /* SHIFT_ASHIFTRT */ |
| { |
| "rotl.b\t#2,%X0", |
| "rotl.w\t#2,%T0", |
| "rotl.l\t#2,%S0" |
| } |
| }; |
| |
| /* Macros to keep the shift algorithm tables small. */ |
| #define INL SHIFT_INLINE |
| #define ROT SHIFT_ROT_AND |
| #define LOP SHIFT_LOOP |
| #define SPC SHIFT_SPECIAL |
| |
| /* The shift algorithms for each machine, mode, shift type, and shift |
| count are defined below. The three tables below correspond to |
| QImode, HImode, and SImode, respectively. Each table is organized |
| by, in the order of indecies, machine, shift type, and shift count. */ |
| |
| static const enum shift_alg shift_alg_qi[3][3][8] = { |
| { |
| /* TARGET_H8300 */ |
| /* 0 1 2 3 4 5 6 7 */ |
| { INL, INL, INL, INL, INL, ROT, ROT, ROT }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC } /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300H */ |
| /* 0 1 2 3 4 5 6 7 */ |
| { INL, INL, INL, INL, INL, ROT, ROT, ROT }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC } /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300S */ |
| /* 0 1 2 3 4 5 6 7 */ |
| { INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, INL, INL, SPC } /* SHIFT_ASHIFTRT */ |
| } |
| }; |
| |
| static const enum shift_alg shift_alg_hi[3][3][16] = { |
| { |
| /* TARGET_H8300 */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300H */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300S */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| SPC, SPC, SPC, SPC, SPC, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| } |
| }; |
| |
| static const enum shift_alg shift_alg_si[3][3][32] = { |
| { |
| /* TARGET_H8300 */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| /* 16 17 18 19 20 21 22 23 */ |
| /* 24 25 26 27 28 29 30 31 */ |
| { INL, INL, INL, LOP, LOP, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP, |
| SPC, SPC, SPC, SPC, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, LOP, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, SPC, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, SPC, SPC, SPC, LOP, LOP, SPC }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, LOP, LOP, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, LOP, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, SPC, LOP, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300H */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| /* 16 17 18 19 20 21 22 23 */ |
| /* 24 25 26 27 28 29 30 31 */ |
| { INL, INL, INL, INL, INL, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP, |
| SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| }, |
| { |
| /* TARGET_H8300S */ |
| /* 0 1 2 3 4 5 6 7 */ |
| /* 8 9 10 11 12 13 14 15 */ |
| /* 16 17 18 19 20 21 22 23 */ |
| /* 24 25 26 27 28 29 30 31 */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| INL, INL, INL, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, |
| SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| INL, INL, INL, LOP, LOP, LOP, LOP, SPC, |
| SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, |
| SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */ |
| { INL, INL, INL, INL, INL, INL, INL, INL, |
| INL, INL, INL, LOP, LOP, LOP, LOP, LOP, |
| SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP, |
| SPC, SPC, LOP, LOP, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */ |
| } |
| }; |
| |
| #undef INL |
| #undef ROT |
| #undef LOP |
| #undef SPC |
| |
| struct shift_info { |
| /* Shift algorithm. */ |
| enum shift_alg alg; |
| |
| /* The number of bits to be shifted by shift1 and shift2. Valid |
| when ALG is SHIFT_SPECIAL. */ |
| unsigned int remainder; |
| |
| /* Special insn for a shift. Valid when ALG is SHIFT_SPECIAL. */ |
| const char *special; |
| |
| /* Insn for a one-bit shift. Valid when ALG is either SHIFT_INLINE |
| or SHIFT_SPECIAL, and REMAINDER is non-zero. */ |
| const char *shift1; |
| |
| /* Insn for a two-bit shift. Valid when ALG is either SHIFT_INLINE |
| or SHIFT_SPECIAL, and REMAINDER is non-zero. */ |
| const char *shift2; |
| |
| /* Valid CC flags. */ |
| int cc_valid_p; |
| }; |
| |
| static void get_shift_alg PARAMS ((enum shift_type, |
| enum shift_mode, unsigned int, |
| struct shift_info *)); |
| |
| /* Given SHIFT_TYPE, SHIFT_MODE, and shift count COUNT, determine the |
| best algorithm for doing the shift. The assembler code is stored |
| in the pointers in INFO. We don't achieve maximum efficiency in |
| all cases, but the hooks are here to do so. |
| |
| For now we just use lots of switch statements. Since we don't even come |
| close to supporting all the cases, this is simplest. If this function ever |
| gets too big, perhaps resort to a more table based lookup. Of course, |
| at this point you may just wish to do it all in rtl. |
| |
| WARNING: The constraints on insns shiftbyn_QI/HI/SI assume shifts of |
| 1,2,3,4 will be inlined (1,2 for SI). */ |
| |
| static void |
| get_shift_alg (shift_type, shift_mode, count, info) |
| enum shift_type shift_type; |
| enum shift_mode shift_mode; |
| unsigned int count; |
| struct shift_info *info; |
| { |
| int cpu; |
| |
| /* Find the target CPU. */ |
| if (TARGET_H8300) |
| cpu = 0; |
| else if (TARGET_H8300H) |
| cpu = 1; |
| else |
| cpu = 2; |
| |
| /* Find the shift algorithm. */ |
| switch (shift_mode) |
| { |
| case QIshift: |
| if (GET_MODE_BITSIZE (QImode) <= count) |
| info->alg = SHIFT_LOOP; |
| else |
| info->alg = shift_alg_qi[cpu][shift_type][count]; |
| break; |
| |
| case HIshift: |
| if (GET_MODE_BITSIZE (HImode) <= count) |
| info->alg = SHIFT_LOOP; |
| else |
| info->alg = shift_alg_hi[cpu][shift_type][count]; |
| break; |
| |
| case SIshift: |
| if (GET_MODE_BITSIZE (SImode) <= count) |
| info->alg = SHIFT_LOOP; |
| else |
| info->alg = shift_alg_si[cpu][shift_type][count]; |
| break; |
| |
| default: |
| abort (); |
| } |
| |
| /* Fill in INFO. Return unless we have SHIFT_SPECIAL. */ |
| switch (info->alg) |
| { |
| case SHIFT_INLINE: |
| info->remainder = count; |
| /* Fall through. */ |
| |
| case SHIFT_LOOP: |
| /* It is up to the caller to know that looping clobbers cc. */ |
| info->shift1 = shift_one[cpu_type][shift_type][shift_mode].assembler; |
| info->shift2 = shift_two[shift_type][shift_mode].assembler; |
| info->cc_valid_p = shift_one[cpu_type][shift_type][shift_mode].cc_valid; |
| goto end; |
| |
| case SHIFT_ROT_AND: |
| info->shift1 = rotate_one[cpu_type][shift_type][shift_mode]; |
| info->shift2 = rotate_two[shift_type][shift_mode]; |
| info->cc_valid_p = 0; |
| goto end; |
| |
| case SHIFT_SPECIAL: |
| /* REMAINDER is 0 for most cases, so initialize it to 0. */ |
| info->remainder = 0; |
| info->shift1 = shift_one[cpu_type][shift_type][shift_mode].assembler; |
| info->shift2 = shift_two[shift_type][shift_mode].assembler; |
| info->cc_valid_p = 0; |
| break; |
| } |
| |
| /* Here we only deal with SHIFT_SPECIAL. */ |
| switch (shift_mode) |
| { |
| case QIshift: |
| /* For ASHIFTRT by 7 bits, the sign bit is simply replicated |
| through the entire value. */ |
| if (shift_type == SHIFT_ASHIFTRT && count == 7) |
| { |
| info->special = "shll\t%X0\n\tsubx\t%X0,%X0"; |
| goto end; |
| } |
| abort (); |
| |
| case HIshift: |
| if (count == 7) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| if (TARGET_H8300) |
| info->special = "shar.b\t%t0\n\tmov.b\t%s0,%t0\n\trotxr.b\t%t0\n\trotr.b\t%s0\n\tand.b\t#0x80,%s0"; |
| else |
| info->special = "shar.b\t%t0\n\tmov.b\t%s0,%t0\n\trotxr.w\t%T0\n\tand.b\t#0x80,%s0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| if (TARGET_H8300) |
| info->special = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.b\t%s0\n\trotl.b\t%t0\n\tand.b\t#0x01,%t0"; |
| else |
| info->special = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.w\t%T0\n\tand.b\t#0x01,%t0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "shal.b\t%s0\n\tmov.b\t%t0,%s0\n\trotxl.b\t%s0\n\tsubx\t%t0,%t0"; |
| goto end; |
| } |
| } |
| else if (8 <= count && count <= 12) |
| { |
| info->remainder = count - 8; |
| |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0"; |
| info->shift1 = "shal.b\t%t0"; |
| info->shift2 = "shal.b\t#2,%t0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.b\t%t0,%s0\n\tsub.b\t%t0,%t0"; |
| info->shift1 = "shlr.b\t%s0"; |
| info->shift2 = "shlr.b\t#2,%s0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| if (TARGET_H8300) |
| info->special = "mov.b\t%t0,%s0\n\tbld\t#7,%s0\n\tsubx\t%t0,%t0"; |
| else |
| info->special = "mov.b\t%t0,%s0\n\texts.w\t%T0"; |
| info->shift1 = "shar.b\t%s0"; |
| info->shift2 = "shar.b\t#2,%s0"; |
| goto end; |
| } |
| } |
| else if (count == 15) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "bld\t#0,%s0\n\txor\t%s0,%s0\n\txor\t%t0,%t0\n\tbst\t#7,%t0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "bld\t#7,%t0\n\txor\t%s0,%s0\n\txor\t%t0,%t0\n\tbst\t#0,%s0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "shll\t%t0\n\tsubx\t%t0,%t0\n\tmov.b\t%t0,%s0"; |
| goto end; |
| } |
| } |
| abort (); |
| |
| case SIshift: |
| if (TARGET_H8300 && 8 <= count && count <= 9) |
| { |
| info->remainder = count - 8; |
| |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.b\t%y0,%z0\n\tmov.b\t%x0,%y0\n\tmov.b\t%w0,%x0\n\tsub.b\t%w0,%w0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.b\t%x0,%w0\n\tmov.b\t%y0,%x0\n\tmov.b\t%z0,%y0\n\tsub.b\t%z0,%z0"; |
| info->shift1 = "shlr\t%y0\n\trotxr\t%x0\n\trotxr\t%w0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "mov.b\t%x0,%w0\n\tmov.b\t%y0,%x0\n\tmov.b\t%z0,%y0\n\tshll\t%z0\n\tsubx\t%z0,%z0"; |
| goto end; |
| } |
| } |
| else if (count == 8 && !TARGET_H8300) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.w\t%e0,%f4\n\tmov.b\t%s4,%t4\n\tmov.b\t%t0,%s4\n\tmov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tmov.w\t%f4,%e0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.w\t%e0,%f4\n\tmov.b\t%t0,%s0\n\tmov.b\t%s4,%t0\n\tmov.b\t%t4,%s4\n\textu.w\t%f4\n\tmov.w\t%f4,%e0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "mov.w\t%e0,%f4\n\tmov.b\t%t0,%s0\n\tmov.b\t%s4,%t0\n\tmov.b\t%t4,%s4\n\texts.w\t%f4\n\tmov.w\t%f4,%e0"; |
| goto end; |
| } |
| } |
| else if (count == 15 && TARGET_H8300) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| abort (); |
| case SHIFT_LSHIFTRT: |
| info->special = "bld\t#7,%z0\n\tmov.w\t%e0,%f0\n\txor\t%y0,%y0\n\txor\t%z0,%z0\n\trotxl\t%w0,%w0\n\trotxl\t%x0,%x0\n\trotxl\t%y0,%y0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "bld\t#7,%z0\n\tmov.w\t%e0,%f0\n\trotxl\t%w0,%w0\n\trotxl\t%x0,%x0\n\tsubx\t%y0,%y0\n\tsubx\t%z0,%z0"; |
| goto end; |
| } |
| } |
| else if (count == 15 && !TARGET_H8300) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "shlr.w\t%e0\n\tmov.w\t%f0,%e0\n\txor.w\t%f0,%f0\n\trotxr.l\t%S0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "shll.w\t%f0\n\tmov.w\t%e0,%f0\n\txor.w\t%e0,%e0\n\trotxl.l\t%S0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| abort (); |
| } |
| } |
| else if ((TARGET_H8300 && 16 <= count && count <= 20) |
| || (TARGET_H8300H && 16 <= count && count <= 19) |
| || (TARGET_H8300S && 16 <= count && count <= 21)) |
| { |
| info->remainder = count - 16; |
| |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.w\t%f0,%e0\n\tsub.w\t%f0,%f0"; |
| if (TARGET_H8300) |
| { |
| info->shift1 = "add.w\t%e0,%e0"; |
| } |
| else |
| { |
| info->shift1 = "shll.l\t%S0"; |
| info->shift2 = "shll.l\t#2,%S0"; |
| } |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.w\t%e0,%f0\n\tsub.w\t%e0,%e0"; |
| if (TARGET_H8300) |
| { |
| info->shift1 = "shlr\t%x0\n\trotxr\t%w0"; |
| } |
| else |
| { |
| info->shift1 = "shlr.l\t%S0"; |
| info->shift2 = "shlr.l\t#2,%S0"; |
| } |
| goto end; |
| case SHIFT_ASHIFTRT: |
| if (TARGET_H8300) |
| { |
| info->special = "mov.w\t%e0,%f0\n\tshll\t%z0\n\tsubx\t%z0,%z0\n\tmov.b\t%z0,%y0"; |
| info->shift1 = "shar\t%x0\n\trotxr\t%w0"; |
| } |
| else |
| { |
| info->special = "mov.w\t%e0,%f0\n\texts.l\t%S0"; |
| info->shift1 = "shar.l\t%S0"; |
| info->shift2 = "shar.l\t#2,%S0"; |
| } |
| goto end; |
| } |
| } |
| else if (TARGET_H8300 && 24 <= count && count <= 28) |
| { |
| info->remainder = count - 24; |
| |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.b\t%w0,%z0\n\tsub.b\t%y0,%y0\n\tsub.w\t%f0,%f0"; |
| info->shift1 = "shll.b\t%z0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.b\t%z0,%w0\n\tsub.b\t%x0,%x0\n\tsub.w\t%e0,%e0"; |
| info->shift1 = "shlr.b\t%w0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "mov.b\t%z0,%w0\n\tbld\t#7,%w0\n\tsubx\t%x0,%x0\n\tsubx\t%x0,%x0\n\tsubx\t%x0,%x0"; |
| info->shift1 = "shar.b\t%w0"; |
| goto end; |
| } |
| } |
| else if ((TARGET_H8300H && count == 24) |
| || (TARGET_H8300S && 24 <= count && count <= 25)) |
| { |
| info->remainder = count - 24; |
| |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "mov.b\t%s0,%t0\n\tsub.b\t%s0,%s0\n\tmov.w\t%f0,%e0\n\tsub.w\t%f0,%f0"; |
| info->shift1 = "shll.l\t%S0"; |
| info->shift2 = "shll.l\t#2,%S0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "mov.w\t%e0,%f0\n\tmov.b\t%t0,%s0\n\textu.w\t%f0\n\textu.l\t%S0"; |
| info->shift1 = "shlr.l\t%S0"; |
| info->shift2 = "shlr.l\t#2,%S0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "mov.w\t%e0,%f0\n\tmov.b\t%t0,%s0\n\texts.w\t%f0\n\texts.l\t%S0"; |
| info->shift1 = "shar.l\t%S0"; |
| info->shift2 = "shar.l\t#2,%S0"; |
| goto end; |
| } |
| } |
| else if (count == 31) |
| { |
| if (TARGET_H8300) |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "sub.w\t%e0,%e0\n\tshlr\t%w0\n\tmov.w\t%e0,%f0\n\trotxr\t%z0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "sub.w\t%f0,%f0\n\tshll\t%z0\n\tmov.w\t%f0,%e0\n\trotxl\t%w0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "shll\t%z0\n\tsubx\t%w0,%w0\n\tmov.b\t%w0,%x0\n\tmov.w\t%f0,%e0"; |
| goto end; |
| } |
| } |
| else |
| { |
| switch (shift_type) |
| { |
| case SHIFT_ASHIFT: |
| info->special = "shlr.l\t%S0\n\txor.l\t%S0,%S0\n\trotxr.l\t%S0"; |
| goto end; |
| case SHIFT_LSHIFTRT: |
| info->special = "shll.l\t%S0\n\txor.l\t%S0,%S0\n\trotxl.l\t%S0"; |
| goto end; |
| case SHIFT_ASHIFTRT: |
| info->special = "shll\t%e0\n\tsubx\t%w0,%w0\n\tmov.b\t%w0,%x0\n\tmov.w\t%f0,%e0"; |
| goto end; |
| } |
| } |
| } |
| abort (); |
| |
| default: |
| abort (); |
| } |
| |
| end: |
| if (!TARGET_H8300S) |
| info->shift2 = NULL; |
| } |
| |
| /* Emit the assembler code for doing shifts. */ |
| |
| const char * |
| output_a_shift (operands) |
| rtx *operands; |
| { |
| static int loopend_lab; |
| rtx shift = operands[3]; |
| enum machine_mode mode = GET_MODE (shift); |
| enum rtx_code code = GET_CODE (shift); |
| enum shift_type shift_type; |
| enum shift_mode shift_mode; |
| struct shift_info info; |
| |
| loopend_lab++; |
| |
| switch (mode) |
| { |
| case QImode: |
| shift_mode = QIshift; |
| break; |
| case HImode: |
| shift_mode = HIshift; |
| break; |
| case SImode: |
| shift_mode = SIshift; |
| break; |
| default: |
| abort (); |
| } |
| |
| switch (code) |
| { |
| case ASHIFTRT: |
| shift_type = SHIFT_ASHIFTRT; |
| break; |
| case LSHIFTRT: |
| shift_type = SHIFT_LSHIFTRT; |
| break; |
| case ASHIFT: |
| shift_type = SHIFT_ASHIFT; |
| break; |
| default: |
| abort (); |
| } |
| |
| if (GET_CODE (operands[2]) != CONST_INT) |
| { |
| /* Indexing by reg, so have to loop and test at top. */ |
| output_asm_insn ("mov.b %X2,%X4", operands); |
| fprintf (asm_out_file, "\tble .Lle%d\n", loopend_lab); |
| |
| /* Get the assembler code to do one shift. */ |
| get_shift_alg (shift_type, shift_mode, 1, &info); |
| |
| fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); |
| output_asm_insn (info.shift1, operands); |
| output_asm_insn ("add #0xff,%X4", operands); |
| fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); |
| fprintf (asm_out_file, ".Lle%d:\n", loopend_lab); |
| |
| return ""; |
| } |
| else |
| { |
| int n = INTVAL (operands[2]); |
| |
| /* If the count is negative, make it 0. */ |
| if (n < 0) |
| n = 0; |
| /* If the count is too big, truncate it. |
| ANSI says shifts of GET_MODE_BITSIZE are undefined - we choose to |
| do the intuitive thing. */ |
| else if ((unsigned int) n > GET_MODE_BITSIZE (mode)) |
| n = GET_MODE_BITSIZE (mode); |
| |
| get_shift_alg (shift_type, shift_mode, n, &info); |
| |
| switch (info.alg) |
| { |
| case SHIFT_SPECIAL: |
| output_asm_insn (info.special, operands); |
| /* Fall through. */ |
| |
| case SHIFT_INLINE: |
| n = info.remainder; |
| |
| /* Emit two bit shifts first. */ |
| if (info.shift2 != NULL) |
| { |
| for (; n > 1; n -= 2) |
| output_asm_insn (info.shift2, operands); |
| } |
| |
| /* Now emit one bit shifts for any residual. */ |
| for (; n > 0; n--) |
| output_asm_insn (info.shift1, operands); |
| |
| /* Keep track of CC. */ |
| if (info.cc_valid_p) |
| { |
| cc_status.value1 = operands[0]; |
| cc_status.flags |= info.cc_valid_p; |
| } |
| return ""; |
| |
| case SHIFT_ROT_AND: |
| { |
| int m = GET_MODE_BITSIZE (mode) - n; |
| int mask = (shift_type == SHIFT_ASHIFT |
| ? ((1 << m) - 1) << n |
| : (1 << m) - 1); |
| char insn_buf[200]; |
| |
| /* Not all possibilities of rotate are supported. They shouldn't |
| be generated, but let's watch for 'em. */ |
| if (info.shift1 == 0) |
| abort (); |
| |
| /* Emit two bit rotates first. */ |
| if (info.shift2 != NULL) |
| { |
| for (; m > 1; m -= 2) |
| output_asm_insn (info.shift2, operands); |
| } |
| |
| /* Now single bit rotates for any residual. */ |
| for (; m > 0; m--) |
| output_asm_insn (info.shift1, operands); |
| |
| /* Now mask off the high bits. */ |
| if (TARGET_H8300) |
| { |
| switch (mode) |
| { |
| case QImode: |
| sprintf (insn_buf, "and\t#%d,%%X0", mask); |
| cc_status.value1 = operands[0]; |
| cc_status.flags |= CC_NO_CARRY; |
| break; |
| case HImode: |
| sprintf (insn_buf, "and\t#%d,%%s0\n\tand\t#%d,%%t0", |
| mask & 255, mask >> 8); |
| break; |
| default: |
| abort (); |
| } |
| } |
| else |
| { |
| sprintf (insn_buf, "and.%c\t#%d,%%%c0", |
| "bwl"[shift_mode], mask, |
| mode == QImode ? 'X' : mode == HImode ? 'T' : 'S'); |
| cc_status.value1 = operands[0]; |
| cc_status.flags |= CC_NO_CARRY; |
| } |
| output_asm_insn (insn_buf, operands); |
| return ""; |
| } |
| |
| case SHIFT_LOOP: |
| /* A loop to shift by a "large" constant value. |
| If we have shift-by-2 insns, use them. */ |
| if (info.shift2 != NULL) |
| { |
| fprintf (asm_out_file, "\tmov.b #%d,%sl\n", n / 2, |
| names_big[REGNO (operands[4])]); |
| fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); |
| output_asm_insn (info.shift2, operands); |
| output_asm_insn ("add #0xff,%X4", operands); |
| fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); |
| if (n % 2) |
| output_asm_insn (info.shift1, operands); |
| } |
| else |
| { |
| fprintf (asm_out_file, "\tmov.b #%d,%sl\n", n, |
| names_big[REGNO (operands[4])]); |
| fprintf (asm_out_file, ".Llt%d:\n", loopend_lab); |
| output_asm_insn (info.shift1, operands); |
| output_asm_insn ("add #0xff,%X4", operands); |
| fprintf (asm_out_file, "\tbne .Llt%d\n", loopend_lab); |
| } |
| return ""; |
| |
| default: |
| abort (); |
| } |
| } |
| } |
| |
| static unsigned int |
| h8300_asm_insn_count (const char *template) |
| { |
| unsigned int count = 1; |
| |
| for (; *template; template++) |
| if (*template == '\n') |
| count++; |
| |
| return count; |
| } |
| |
| unsigned int |
| compute_a_shift_length (insn, operands) |
| rtx insn ATTRIBUTE_UNUSED; |
| rtx *operands; |
| { |
| rtx shift = operands[3]; |
| enum machine_mode mode = GET_MODE (shift); |
| enum rtx_code code = GET_CODE (shift); |
| enum shift_type shift_type; |
| enum shift_mode shift_mode; |
| struct shift_info info; |
| unsigned int wlength = 0; |
| |
| switch (mode) |
| { |
| case QImode: |
| shift_mode = QIshift; |
| break; |
| case HImode: |
| shift_mode = HIshift; |
| break; |
| case SImode: |
| shift_mode = SIshift; |
| break; |
| default: |
| abort (); |
| } |
| |
| switch (code) |
| { |
| case ASHIFTRT: |
| shift_type = SHIFT_ASHIFTRT; |
| break; |
| case LSHIFTRT: |
| shift_type = SHIFT_LSHIFTRT; |
| break; |
| case ASHIFT: |
| shift_type = SHIFT_ASHIFT; |
| break; |
| default: |
| abort (); |
| } |
| |
| if (GET_CODE (operands[2]) != CONST_INT) |
| { |
| /* Get the assembler code to do one shift. */ |
| get_shift_alg (shift_type, shift_mode, 1, &info); |
| |
| return (4 + h8300_asm_insn_count (info.shift1)) * 2; |
| } |
| else |
| { |
| int n = INTVAL (operands[2]); |
| |
| /* If the count is negative, make it 0. */ |
| if (n < 0) |
| n = 0; |
| /* If the count is too big, truncate it. |
| ANSI says shifts of GET_MODE_BITSIZE are undefined - we choose to |
| do the intuitive thing. */ |
| else if ((unsigned int) n > GET_MODE_BITSIZE (mode)) |
| n = GET_MODE_BITSIZE (mode); |
| |
| get_shift_alg (shift_type, shift_mode, n, &info); |
| |
| switch (info.alg) |
| { |
| case SHIFT_SPECIAL: |
| wlength += h8300_asm_insn_count (info.special); |
| /* Fall through. */ |
| |
| case SHIFT_INLINE: |
| n = info.remainder; |
| |
| if (info.shift2 != NULL) |
| { |
| wlength += h8300_asm_insn_count (info.shift2) * (n / 2); |
| n = n % 2; |
| } |
| |
| wlength += h8300_asm_insn_count (info.shift1) * n; |
| |
| return 2 * wlength; |
| |
| case SHIFT_ROT_AND: |
| { |
| int m = GET_MODE_BITSIZE (mode) - n; |
| |
| /* Not all possibilities of rotate are supported. They shouldn't |
| be generated, but let's watch for 'em. */ |
| if (info.shift1 == 0) |
| abort (); |
| |
| if (info.shift2 != NULL) |
| { |
| wlength += h8300_asm_insn_count (info.shift2) * (m / 2); |
| m = m % 2; |
| } |
| |
| wlength += h8300_asm_insn_count (info.shift1) * m; |
| |
| /* Now mask off the high bits. */ |
| switch (mode) |
| { |
| case QImode: |
| wlength += 1; |
| break; |
| case HImode: |
| wlength += 2; |
| break; |
| case SImode: |
| if (TARGET_H8300) |
| abort (); |
| wlength += 3; |
| break; |
| default: |
| abort (); |
| } |
| return 2 * wlength; |
| } |
| |
| case SHIFT_LOOP: |
| /* A loop to shift by a "large" constant value. |
| If we have shift-by-2 insns, use them. */ |
| if (info.shift2 != NULL) |
| { |
| wlength += 3 + h8300_asm_insn_count (info.shift2); |
| if (n % 2) |
| wlength += h8300_asm_insn_count (info.shift1); |
| } |
| else |
| { |
| wlength += 3 + h8300_asm_insn_count (info.shift1); |
| } |
| return 2 * wlength; |
| |
| default: |
| abort (); |
| } |
| } |
| } |
| |
| /* A rotation by a non-constant will cause a loop to be generated, in |
| which a rotation by one bit is used. A rotation by a constant, |
| including the one in the loop, will be taken care of by |
| emit_a_rotate () at the insn emit time. */ |
| |
| int |
| expand_a_rotate (code, operands) |
| enum rtx_code code; |
| rtx operands[]; |
| { |
| rtx dst = operands[0]; |
| rtx src = operands[1]; |
| rtx rotate_amount = operands[2]; |
| enum machine_mode mode = GET_MODE (dst); |
| rtx tmp; |
| |
| /* We rotate in place. */ |
| emit_move_insn (dst, src); |
| |
| if (GET_CODE (rotate_amount) != CONST_INT) |
| { |
| rtx counter = gen_reg_rtx (QImode); |
| rtx start_label = gen_label_rtx (); |
| rtx end_label = gen_label_rtx (); |
| |
| /* If the rotate amount is less than or equal to 0, |
| we go out of the loop. */ |
| emit_cmp_and_jump_insns (rotate_amount, GEN_INT (0), LE, NULL_RTX, |
| QImode, 0, end_label); |
| |
| /* Initialize the loop counter. */ |
| emit_move_insn (counter, rotate_amount); |
| |
| emit_label (start_label); |
| |
| /* Rotate by one bit. */ |
| tmp = gen_rtx (code, mode, dst, GEN_INT (1)); |
| emit_insn (gen_rtx_SET (mode, dst, tmp)); |
| |
| /* Decrement the counter by 1. */ |
| tmp = gen_rtx_PLUS (QImode, counter, GEN_INT (-1)); |
| emit_insn (gen_rtx_SET (VOIDmode, counter, tmp)); |
| |
| /* If the loop counter is non-zero, we go back to the beginning |
| of the loop. */ |
| emit_cmp_and_jump_insns (counter, GEN_INT (0), NE, NULL_RTX, QImode, 1, |
| start_label); |
| |
| emit_label (end_label); |
| } |
| else |
| { |
| /* Rotate by AMOUNT bits. */ |
| tmp = gen_rtx (code, mode, dst, rotate_amount); |
| emit_insn (gen_rtx_SET (mode, dst, tmp)); |
| } |
| |
| return 1; |
| } |
| |
| /* Emit rotate insns. */ |
| |
| const char * |
| emit_a_rotate (code, operands) |
| enum rtx_code code; |
| rtx *operands; |
| { |
| rtx dst = operands[0]; |
| rtx rotate_amount = operands[2]; |
| enum shift_mode rotate_mode; |
| enum shift_type rotate_type; |
| const char *insn_buf; |
| int bits; |
| int amount; |
| enum machine_mode mode = GET_MODE (dst); |
| |
| if (GET_CODE (rotate_amount) != CONST_INT) |
| abort (); |
| |
| switch (mode) |
| { |
| case QImode: |
| rotate_mode = QIshift; |
| break; |
| case HImode: |
| rotate_mode = HIshift; |
| break; |
| case SImode: |
| rotate_mode = SIshift; |
| break; |
| default: |
| abort (); |
| } |
| |
| switch (code) |
| { |
| case ROTATERT: |
| rotate_type = SHIFT_ASHIFT; |
| break; |
| case ROTATE: |
| rotate_type = SHIFT_LSHIFTRT; |
| break; |
| default: |
| abort (); |
| } |
| |
| amount = INTVAL (rotate_amount); |
| |
| /* Clean up AMOUNT. */ |
| if (amount < 0) |
| amount = 0; |
| if ((unsigned int) amount > GET_MODE_BITSIZE (mode)) |
| amount = GET_MODE_BITSIZE (mode); |
| |
| /* Determine the faster direction. After this phase, amount will be |
| at most a half of GET_MODE_BITSIZE (mode). */ |
| if ((unsigned int) amount > GET_MODE_BITSIZE (mode) / 2U) |
| { |
| /* Flip the direction. */ |
| amount = GET_MODE_BITSIZE (mode) - amount; |
| rotate_type = |
| (rotate_type == SHIFT_ASHIFT) ? SHIFT_LSHIFTRT : SHIFT_ASHIFT; |
| } |
| |
| /* See if a byte swap (in HImode) or a word swap (in SImode) can |
| boost up the rotation. */ |
| if ((mode == HImode && TARGET_H8300 && amount >= 5) |
| || (mode == HImode && TARGET_H8300H && amount >= 6) |
| || (mode == HImode && TARGET_H8300S && amount == 8) |
| || (mode == SImode && TARGET_H8300H && amount >= 10) |
| || (mode == SImode && TARGET_H8300S && amount >= 13)) |
| { |
| switch (mode) |
| { |
| case HImode: |
| /* This code works on any family. */ |
| insn_buf = "xor.b\t%s0,%t0\n\txor.b\t%t0,%s0\n\txor.b\t%s0,%t0"; |
| output_asm_insn (insn_buf, operands); |
| break; |
| |
| case SImode: |
| /* This code works on the H8/300H and H8/S. */ |
| insn_buf = "xor.w\t%e0,%f0\n\txor.w\t%f0,%e0\n\txor.w\t%e0,%f0"; |
| output_asm_insn (insn_buf, operands); |
| break; |
| |
| default: |
| abort (); |
| } |
| |
| /* Adjust AMOUNT and flip the direction. */ |
| amount = GET_MODE_BITSIZE (mode) / 2 - amount; |
| rotate_type = |
| (rotate_type == SHIFT_ASHIFT) ? SHIFT_LSHIFTRT : SHIFT_ASHIFT; |
| } |
| |
| /* Emit rotate insns. */ |
| for (bits = TARGET_H8300S ? 2 : 1; bits > 0; bits /= 2) |
| { |
| if (bits == 2) |
| insn_buf = rotate_two[rotate_type][rotate_mode]; |
| else |
| insn_buf = rotate_one[cpu_type][rotate_type][rotate_mode]; |
| |
| for (; amount >= bits; amount -= bits) |
| output_asm_insn (insn_buf, operands); |
| } |
| |
| return ""; |
| } |
| |
| /* Fix the operands of a gen_xxx so that it could become a bit |
| operating insn. */ |
| |
| int |
| fix_bit_operand (operands, what, type) |
| rtx *operands; |
| int what; |
| enum rtx_code type; |
| { |
| /* The bit_operand predicate accepts any memory during RTL generation, but |
| only 'U' memory afterwards, so if this is a MEM operand, we must force |
| it to be valid for 'U' by reloading the address. */ |
| |
| if (GET_CODE (operands[2]) == CONST_INT) |
| { |
| if (CONST_OK_FOR_LETTER_P (INTVAL (operands[2]), what)) |
| { |
| /* Ok to have a memory dest. */ |
| if (GET_CODE (operands[0]) == MEM |
| && !EXTRA_CONSTRAINT (operands[0], 'U')) |
| { |
| rtx mem = gen_rtx_MEM (GET_MODE (operands[0]), |
| copy_to_mode_reg (Pmode, |
| XEXP (operands[0], 0))); |
| MEM_COPY_ATTRIBUTES (mem, operands[0]); |
| operands[0] = mem; |
| } |
| |
| if (GET_CODE (operands[1]) == MEM |
| && !EXTRA_CONSTRAINT (operands[1], 'U')) |
| { |
| rtx mem = gen_rtx_MEM (GET_MODE (operands[1]), |
| copy_to_mode_reg (Pmode, |
| XEXP (operands[1], 0))); |
| MEM_COPY_ATTRIBUTES (mem, operands[0]); |
| operands[1] = mem; |
| } |
| return 0; |
| } |
| } |
| |
| /* Dest and src op must be register. */ |
| |
| operands[1] = force_reg (QImode, operands[1]); |
| { |
| rtx res = gen_reg_rtx (QImode); |
| emit_insn (gen_rtx_SET (VOIDmode, res, |
| gen_rtx (type, QImode, operands[1], operands[2]))); |
| emit_insn (gen_rtx_SET (VOIDmode, operands[0], res)); |
| } |
| return 1; |
| } |
| |
| /* Return nonzero if FUNC is an interrupt function as specified |
| by the "interrupt" attribute. */ |
| |
| static int |
| h8300_interrupt_function_p (func) |
| tree func; |
| { |
| tree a; |
| |
| if (TREE_CODE (func) != FUNCTION_DECL) |
| return 0; |
| |
| a = lookup_attribute ("interrupt_handler", DECL_ATTRIBUTES (func)); |
| return a != NULL_TREE; |
| } |
| |
| /* Return nonzero if FUNC is an OS_Task function as specified |
| by the "OS_Task" attribute. */ |
| |
| static int |
| h8300_os_task_function_p (func) |
| tree func; |
| { |
| tree a; |
| |
| if (TREE_CODE (func) != FUNCTION_DECL) |
| return 0; |
| |
| a = lookup_attribute ("OS_Task", DECL_ATTRIBUTES (func)); |
| return a != NULL_TREE; |
| } |
| |
| /* Return nonzero if FUNC is a monitor function as specified |
| by the "monitor" attribute. */ |
| |
| static int |
| h8300_monitor_function_p (func) |
| tree func; |
| { |
| tree a; |
| |
| if (TREE_CODE (func) != FUNCTION_DECL) |
| return 0; |
| |
| a = lookup_attribute ("monitor", DECL_ATTRIBUTES (func)); |
| return a != NULL_TREE; |
| } |
| |
| /* Return nonzero if FUNC is a function that should be called |
| through the function vector. */ |
| |
| int |
| h8300_funcvec_function_p (func) |
| tree func; |
| { |
| tree a; |
| |
| if (TREE_CODE (func) != FUNCTION_DECL) |
| return 0; |
| |
| a = lookup_attribute ("function_vector", DECL_ATTRIBUTES (func)); |
| return a != NULL_TREE; |
| } |
| |
| /* Return nonzero if DECL is a variable that's in the eight bit |
| data area. */ |
| |
| int |
| h8300_eightbit_data_p (decl) |
| tree decl; |
| { |
| tree a; |
| |
| if (TREE_CODE (decl) != VAR_DECL) |
| return 0; |
| |
| a = lookup_attribute ("eightbit_data", DECL_ATTRIBUTES (decl)); |
| return a != NULL_TREE; |
| } |
| |
| /* Return nonzero if DECL is a variable that's in the tiny |
| data area. */ |
| |
| int |
| h8300_tiny_data_p (decl) |
| tree decl; |
| { |
| tree a; |
| |
| if (TREE_CODE (decl) != VAR_DECL) |
| return 0; |
| |
| a = lookup_attribute ("tiny_data", DECL_ATTRIBUTES (decl)); |
| return a != NULL_TREE; |
| } |
| |
| /* Supported attributes: |
| |
| interrupt_handler: output a prologue and epilogue suitable for an |
| interrupt handler. |
| |
| function_vector: This function should be called through the |
| function vector. |
| |
| eightbit_data: This variable lives in the 8-bit data area and can |
| be referenced with 8-bit absolute memory addresses. |
| |
| tiny_data: This variable lives in the tiny data area and can be |
| referenced with 16-bit absolute memory references. */ |
| |
| const struct attribute_spec h8300_attribute_table[] = |
| { |
| /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ |
| { "interrupt_handler", 0, 0, true, false, false, h8300_handle_fndecl_attribute }, |
| { "OS_Task", 0, 0, true, false, false, h8300_handle_fndecl_attribute }, |
| { "monitor", 0, 0, true, false, false, h8300_handle_fndecl_attribute }, |
| { "function_vector", 0, 0, true, false, false, h8300_handle_fndecl_attribute }, |
| { "eightbit_data", 0, 0, true, false, false, h8300_handle_eightbit_data_attribute }, |
| { "tiny_data", 0, 0, true, false, false, h8300_handle_tiny_data_attribute }, |
| { NULL, 0, 0, false, false, false, NULL } |
| }; |
| |
| |
| /* Handle an attribute requiring a FUNCTION_DECL; arguments as in |
| struct attribute_spec.handler. */ |
| static tree |
| h8300_handle_fndecl_attribute (node, name, args, flags, no_add_attrs) |
| tree *node; |
| tree name; |
| tree args ATTRIBUTE_UNUSED; |
| int flags ATTRIBUTE_UNUSED; |
| bool *no_add_attrs; |
| { |
| if (TREE_CODE (*node) != FUNCTION_DECL) |
| { |
| warning ("`%s' attribute only applies to functions", |
| IDENTIFIER_POINTER (name)); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "eightbit_data" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| static tree |
| h8300_handle_eightbit_data_attribute (node, name, args, flags, no_add_attrs) |
| tree *node; |
| tree name; |
| tree args ATTRIBUTE_UNUSED; |
| int flags ATTRIBUTE_UNUSED; |
| bool *no_add_attrs; |
| { |
| tree decl = *node; |
| |
| if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)) |
| { |
| DECL_SECTION_NAME (decl) = build_string (7, ".eight"); |
| } |
| else |
| { |
| warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| /* Handle an "tiny_data" attribute; arguments as in |
| struct attribute_spec.handler. */ |
| static tree |
| h8300_handle_tiny_data_attribute (node, name, args, flags, no_add_attrs) |
| tree *node; |
| tree name; |
| tree args ATTRIBUTE_UNUSED; |
| int flags ATTRIBUTE_UNUSED; |
| bool *no_add_attrs; |
| { |
| tree decl = *node; |
| |
| if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)) |
| { |
| DECL_SECTION_NAME (decl) = build_string (6, ".tiny"); |
| } |
| else |
| { |
| warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); |
| *no_add_attrs = true; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| void |
| h8300_encode_label (decl) |
| tree decl; |
| { |
| const char *str = XSTR (XEXP (DECL_RTL (decl), 0), 0); |
| int len = strlen (str); |
| char *newstr = alloca (len + 2); |
| |
| newstr[0] = '&'; |
| strcpy (&newstr[1], str); |
| |
| XSTR (XEXP (DECL_RTL (decl), 0), 0) = |
| ggc_alloc_string (newstr, len + 1); |
| } |
| |
| const char * |
| output_simode_bld (bild, operands) |
| int bild; |
| rtx operands[]; |
| { |
| if (TARGET_H8300) |
| { |
| /* Clear the destination register. */ |
| output_asm_insn ("sub.w\t%e0,%e0\n\tsub.w\t%f0,%f0", operands); |
| |
| /* Now output the bit load or bit inverse load, and store it in |
| the destination. */ |
| if (bild) |
| output_asm_insn ("bild\t%Z2,%Y1", operands); |
| else |
| output_asm_insn ("bld\t%Z2,%Y1", operands); |
| |
| output_asm_insn ("bst\t#0,%w0", operands); |
| } |
| else |
| { |
| /* Output the bit load or bit inverse load. */ |
| if (bild) |
| output_asm_insn ("bild\t%Z2,%Y1", operands); |
| else |
| output_asm_insn ("bld\t%Z2,%Y1", operands); |
| |
| /* Clear the destination register and perform the bit store. */ |
| output_asm_insn ("xor.l\t%S0,%S0\n\tbst\t#0,%w0", operands); |
| } |
| |
| /* All done. */ |
| return ""; |
| } |
| |
| /* Given INSN and its current length LENGTH, return the adjustment |
| (in bytes) to correctly compute INSN's length. |
| |
| We use this to get the lengths of various memory references correct. */ |
| |
| int |
| h8300_adjust_insn_length (insn, length) |
| rtx insn; |
| int length ATTRIBUTE_UNUSED; |
| { |
| rtx pat = PATTERN (insn); |
| |
| /* We must filter these out before calling get_attr_adjust_length. */ |
| if (GET_CODE (pat) == USE |
| || GET_CODE (pat) == CLOBBER |
| || GET_CODE (pat) == SEQUENCE |
| || GET_CODE (pat) == ADDR_VEC |
| || GET_CODE (pat) == ADDR_DIFF_VEC) |
| return 0; |
| |
| if (get_attr_adjust_length (insn) == ADJUST_LENGTH_NO) |
| return 0; |
| |
| /* Adjust length for reg->mem and mem->reg copies. */ |
| if (GET_CODE (pat) == SET |
| && (GET_CODE (SET_SRC (pat)) == MEM |
| || GET_CODE (SET_DEST (pat)) == MEM)) |
| { |
| /* This insn might need a length adjustment. */ |
| rtx addr; |
| |
| if (GET_CODE (SET_SRC (pat)) == MEM) |
| addr = XEXP (SET_SRC (pat), 0); |
| else |
| addr = XEXP (SET_DEST (pat), 0); |
| |
| if (TARGET_H8300) |
| { |
| /* On the H8/300, we subtract the difference between the |
| actual length and the longest one, which is @(d:16,ERs). */ |
| |
| /* @Rs is 2 bytes shorter than the longest. */ |
| if (GET_CODE (addr) == REG) |
| return -2; |
| } |
| else |
| { |
| /* On the H8/300H and H8/S, we subtract the difference |
| between the actual length and the longest one, which is |
| @(d:24,ERs). */ |
| |
| /* @ERs is 6 bytes shorter than the longest. */ |
| if (GET_CODE (addr) == REG) |
| return -6; |
| |
| /* @(d:16,ERs) is 6 bytes shorter than the longest. */ |
| if (GET_CODE (addr) == PLUS |
| && GET_CODE (XEXP (addr, 0)) == REG |
| && GET_CODE (XEXP (addr, 1)) == CONST_INT |
| && INTVAL (XEXP (addr, 1)) > -32768 |
| && INTVAL (XEXP (addr, 1)) < 32767) |
| return -4; |
| |
| /* @aa:16 is 2 bytes shorter than the longest. */ |
| if (GET_CODE (addr) == SYMBOL_REF |
| && TINY_DATA_NAME_P (XSTR (addr, 0))) |
| return -2; |
| } |
| } |
| |
| /* Loading some constants needs adjustment. */ |
| if (GET_CODE (pat) == SET |
| && GET_CODE (SET_SRC (pat)) == CONST_INT |
| && GET_MODE (SET_DEST (pat)) == SImode |
| && INTVAL (SET_SRC (pat)) != 0) |
| { |
| int val = INTVAL (SET_SRC (pat)); |
| |
| if (TARGET_H8300 |
| && ((val & 0xffff) == 0 |
| || ((val >> 16) & 0xffff) == 0)) |
| return -2; |
| |
| if (TARGET_H8300H || TARGET_H8300S) |
| { |
| if (val == (val & 0xff) |
| || val == (val & 0xff00)) |
| return 4 - 6; |
| |
| switch (val & 0xffffffff) |
| { |
| case 0xffffffff: |
| case 0xfffffffe: |
| case 0xfffffffc: |
| case 0x0000ffff: |
| case 0x0000fffe: |
| case 0xffff0000: |
| case 0xfffe0000: |
| case 0x00010000: |
| case 0x00020000: |
| return 4 - 6; |
| } |
| } |
| } |
| |
| /* Rotations need various adjustments. */ |
| if (GET_CODE (pat) == SET |
| && (GET_CODE (SET_SRC (pat)) == ROTATE |
| || GET_CODE (SET_SRC (pat)) == ROTATERT)) |
| { |
| rtx src = SET_SRC (pat); |
| enum machine_mode mode = GET_MODE (src); |
| int amount; |
| int states = 0; |
| |
| if (GET_CODE (XEXP (src, 1)) != CONST_INT) |
| return 0; |
| |
| amount = INTVAL (XEXP (src, 1)); |
| |
| /* Clean up AMOUNT. */ |
| if (amount < 0) |
| amount = 0; |
| if ((unsigned int) amount > GET_MODE_BITSIZE (mode)) |
| amount = GET_MODE_BITSIZE (mode); |
| |
| /* Determine the faster direction. After this phase, amount |
| will be at most a half of GET_MODE_BITSIZE (mode). */ |
| if ((unsigned int) amount > GET_MODE_BITSIZE (mode) / 2U) |
| /* Flip the direction. */ |
| amount = GET_MODE_BITSIZE (mode) - amount; |
| |
| /* See if a byte swap (in HImode) or a word swap (in SImode) can |
| boost up the rotation. */ |
| if ((mode == HImode && TARGET_H8300 && amount >= 5) |
| || (mode == HImode && TARGET_H8300H && amount >= 6) |
| || (mode == HImode && TARGET_H8300S && amount == 8) |
| || (mode == SImode && TARGET_H8300H && amount >= 10) |
| || (mode == SImode && TARGET_H8300S && amount >= 13)) |
| { |
| /* Adjust AMOUNT and flip the direction. */ |
| amount = GET_MODE_BITSIZE (mode) / 2 - amount; |
| states += 6; |
| } |
| |
| /* We use 2-bit rotatations on the H8/S. */ |
| if (TARGET_H8300S) |
| amount = amount / 2 + amount % 2; |
| |
| /* The H8/300 uses three insns to rotate one bit, taking 6 |
| states. */ |
| states += amount * ((TARGET_H8300 && mode == HImode) ? 6 : 2); |
| |
| return -(20 - states); |
| } |
| |
| return 0; |
| } |
| |
| #ifndef OBJECT_FORMAT_ELF |
| static void |
| h8300_asm_named_section (name, flags) |
| const char *name; |
| unsigned int flags ATTRIBUTE_UNUSED; |
| { |
| /* ??? Perhaps we should be using default_coff_asm_named_section. */ |
| fprintf (asm_out_file, "\t.section %s\n", name); |
| } |
| #endif /* ! OBJECT_FORMAT_ELF */ |