;; Machine Descriptions for R8C/M16C/M32C ;; Copyright (C) 2005-2021 Free Software Foundation, Inc. ;; Contributed by Red Hat. ;; ;; This file is part of GCC. ;; ;; GCC is free software; you can redistribute it and/or modify it ;; under the terms of the GNU General Public License as published ;; by the Free Software Foundation; either version 3, or (at your ;; option) any later version. ;; ;; GCC is distributed in the hope that it will be useful, but WITHOUT ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public ;; License for more details. ;; ;; You should have received a copy of the GNU General Public License ;; along with GCC; see the file COPYING3. If not see ;; http://www.gnu.org/licenses/.
;; bit shifting
; Shifts are unusual for m32c. We only support shifting in one ; “direction” but the shift count is signed. Also, immediate shift ; counts have a limited range, and variable shift counts have to be in ; $r1h which GCC normally doesn't even know about.
; Other than compensating for the above, the patterns below are pretty ; straightforward.
(define_insn “ashlqi3_i” [(set (match_operand:QI 0 “mra_operand” “=RqiSdRmm,RqiSdRmm”) (ashift:QI (match_operand:QI 1 “mra_operand” “0,0”) (match_operand:QI 2 “mrai_operand” “In4,RqiSd”))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ sha.b\t%2,%0 mov.b\t%2,r1h\n\tsha.b\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “ashrqi3_i” [(set (match_operand:QI 0 “mra_operand” “=RqiSdRmm,RqiSdRmm”) (ashiftrt:QI (match_operand:QI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “mrai_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ sha.b\t%2,%0 mov.b\t%2,r1h\n\tsha.b\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “lshrqi3_i” [(set (match_operand:QI 0 “mra_operand” “=RqiSdRmm,RqiSdRmm”) (lshiftrt:QI (match_operand:QI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “mrai_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ shl.b\t%2,%0 mov.b\t%2,r1h\n\tshl.b\tr1h,%0” [(set_attr “flags” “szc,szc”)] )
(define_expand “ashlqi3” [(parallel [(set (match_operand:QI 0 “mra_operand” "") (ashift:QI (match_operand:QI 1 “mra_operand” "") (match_operand:QI 2 “general_operand” ""))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, 1, ASHIFT)) DONE;” )
(define_expand “ashrqi3” [(parallel [(set (match_operand:QI 0 “mra_operand” "") (ashiftrt:QI (match_operand:QI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “general_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, ASHIFTRT)) DONE;” )
(define_expand “lshrqi3” [(parallel [(set (match_operand:QI 0 “mra_operand” "") (lshiftrt:QI (match_operand:QI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “general_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, LSHIFTRT)) DONE;” )
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(define_insn “ashlhi3_i” [(set (match_operand:HI 0 “mra_operand” “=SdRhiRmm,SdRhiRmm”) (ashift:HI (match_operand:HI 1 “mra_operand” “0,0”) (match_operand:QI 2 “mrai_operand” “In4,RqiSd”))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ sha.w\t%2,%0 mov.b\t%2,r1h\n\tsha.w\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “ashrhi3_i” [(set (match_operand:HI 0 “mra_operand” “=SdRhiRmm,SdRhiRmm”) (ashiftrt:HI (match_operand:HI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “mrai_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ sha.w\t%2,%0 mov.b\t%2,r1h\n\tsha.w\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “lshrhi3_i” [(set (match_operand:HI 0 “mra_operand” “=RhiSdRmm,RhiSdRmm”) (lshiftrt:HI (match_operand:HI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “mrai_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] "" “@ shl.w\t%2,%0 mov.b\t%2,r1h\n\tshl.w\tr1h,%0” [(set_attr “flags” “szc,szc”)] )
(define_expand “ashlhi3” [(parallel [(set (match_operand:HI 0 “mra_operand” "") (ashift:HI (match_operand:HI 1 “mra_operand” "") (match_operand:QI 2 “general_operand” ""))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, 1, ASHIFT)) DONE;” )
(define_expand “ashrhi3” [(parallel [(set (match_operand:HI 0 “mra_operand” "") (ashiftrt:HI (match_operand:HI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “general_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, ASHIFTRT)) DONE;” )
(define_expand “lshrhi3” [(parallel [(set (match_operand:HI 0 “mra_operand” "") (lshiftrt:HI (match_operand:HI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “general_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, LSHIFTRT)) DONE;” )
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(define_insn “ashlpsi3_i” [(set (match_operand:PSI 0 “mra_operand” “=R02RaaSdRmm,R02RaaSdRmm”) (ashift:PSI (match_operand:PSI 1 “mra_operand” “0,0”) (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “ashrpsi3_i” [(set (match_operand:PSI 0 “mra_operand” “=R02RaaSdRmm,R02RaaSdRmm”) (ashiftrt:PSI (match_operand:PSI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “lshrpsi3_i” [(set (match_operand:PSI 0 “mra_operand” “=R02RaaSd,??Rmm”) (lshiftrt:PSI (match_operand:PSI 1 “mra_operand” “0,0”) (neg:QI (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ shl.l\t%2,%0 mov.b\t%2,r1h\n\tshl.l\tr1h,%0” [(set_attr “flags” “szc,szc”)] )
(define_expand “ashlpsi3” [(parallel [(set (match_operand:PSI 0 “mra_operand” "") (ashift:PSI (match_operand:PSI 1 “mra_operand” "") (match_operand:QI 2 “shiftcount_operand” ""))) (clobber (match_scratch:HI 3 ""))])] “TARGET_A24” “if (m32c_prepare_shift (operands, 1, ASHIFT)) DONE;” )
(define_expand “ashrpsi3” [(parallel [(set (match_operand:PSI 0 “mra_operand” "") (ashiftrt:PSI (match_operand:PSI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “shiftcount_operand” "")))) (clobber (match_scratch:HI 3 ""))])] “TARGET_A24” “if (m32c_prepare_shift (operands, -1, ASHIFTRT)) DONE;” )
(define_expand “lshrpsi3” [(parallel [(set (match_operand:PSI 0 “mra_operand” "") (lshiftrt:PSI (match_operand:PSI 1 “mra_operand” "") (neg:QI (match_operand:QI 2 “shiftcount_operand” "")))) (clobber (match_scratch:HI 3 ""))])] “TARGET_A24” “if (m32c_prepare_shift (operands, -1, LSHIFTRT)) DONE;” )
; - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
; The m16c has a maximum shift count of -16..16, even when in a ; register. It's optimal to use multiple shifts of -8..8 rather than ; loading larger constants into R1H multiple time. The m32c can shift ; -32..32 either via immediates or in registers. Hence, separate ; patterns.
(define_insn “ashlsi3_16” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (ashift:SI (match_operand:SI 1 “r0123_operand” “0,0”) (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A16” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “ashrsi3_16” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (ashiftrt:SI (match_operand:SI 1 “r0123_operand” “0,0”) (neg:QI (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A16” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” [(set_attr “flags” “oszc,oszc”)] )
(define_insn “lshrsi3_16” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (lshiftrt:SI (match_operand:SI 1 “r0123_operand” “0,0”) (neg:QI (match_operand:QI 2 “shiftcount_operand” “In4,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A16” “@ shl.l\t%2,%0 mov.b\t%2,r1h\n\tshl.l\tr1h,%0” [(set_attr “flags” “szc,szc”)] )
(define_insn “ashlsi3_24” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (ashift:SI (match_operand:SI 1 “r0123_operand” “0,0”) (match_operand:QI 2 “longshiftcount_operand” “In6,RqiSd”))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” )
(define_insn “ashrsi3_24” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (ashiftrt:SI (match_operand:SI 1 “r0123_operand” “0,0”) (neg:QI (match_operand:QI 2 “longshiftcount_operand” “In6,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ sha.l\t%2,%0 mov.b\t%2,r1h\n\tsha.l\tr1h,%0” )
(define_insn “lshrsi3_24” [(set (match_operand:SI 0 “r0123_operand” “=R03,R03”) (lshiftrt:SI (match_operand:SI 1 “r0123_operand” “0,0”) (neg:QI (match_operand:QI 2 “longshiftcount_operand” “In6,RqiSd”)))) (clobber (match_scratch:HI 3 “=X,R1w”))] “TARGET_A24” “@ shl.l\t%2,%0 mov.b\t%2,r1h\n\tshl.l\tr1h,%0” )
(define_expand “ashlsi3” [(parallel [(set (match_operand:SI 0 “r0123_operand” "") (ashift:SI (match_operand:SI 1 “r0123_operand” "") (match_operand:QI 2 “mrai_operand” ""))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, 1, ASHIFT)) DONE;” )
(define_expand “ashrsi3” [(parallel [(set (match_operand:SI 0 “r0123_operand” "") (ashiftrt:SI (match_operand:SI 1 “r0123_operand” "") (neg:QI (match_operand:QI 2 “mrai_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, ASHIFTRT)) DONE;” )
(define_expand “lshrsi3” [(parallel [(set (match_operand:SI 0 “r0123_operand” "") (lshiftrt:SI (match_operand:SI 1 “r0123_operand” "") (neg:QI (match_operand:QI 2 “mrai_operand” "")))) (clobber (match_scratch:HI 3 ""))])] "" “if (m32c_prepare_shift (operands, -1, LSHIFTRT)) DONE;” )