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| author | Uros Bizjak <ubizjak@gmail.com> | 2024-11-25 20:04:38 +0100 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2024-11-25 20:07:06 +0100 |
| commit | 551fd4d5c98859522dd21db6fbb39fceac3936b2 (patch) | |
| tree | 39020bc664c8517a90802dcf0fc8e667be8a18d7 | |
| parent | 9afcbc2dd3cd2dfe90c91ddfa71a49e571ad5e61 (diff) | |
| download | gcc-551fd4d5c98859522dd21db6fbb39fceac3936b2.zip gcc-551fd4d5c98859522dd21db6fbb39fceac3936b2.tar.gz gcc-551fd4d5c98859522dd21db6fbb39fceac3936b2.tar.bz2 | |
i386: Generalize x >> 32-y to x >> -y conversion with multiples of 32
Optimize also cases where immediate value is a multiple of 32 for 32-bit
shifts (or multiple of 64 for 64-bit shifts).
gcc/ChangeLog:
* config/i386/i386.md (*ashl<mode>3_negcnt):
For SImode shifts allow multiples of 32 (or multiples
of 64 for DImode shifts) for immediate operand 3.
(*ashl<mode>3_negcnt_1): Ditto.
(*<insn><mode>3_negcnt): Ditto.
(*<insn><mode>3_negcnt_1): Ditto.
| -rw-r--r-- | gcc/config/i386/i386.md | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md index 399a6a8..df78e4d 100644 --- a/gcc/config/i386/i386.md +++ b/gcc/config/i386/i386.md @@ -15906,7 +15906,7 @@ (match_operand 2 "int248_register_operand" "c,r")) 0))) (clobber (reg:CC FLAGS_REG))] "ix86_binary_operator_ok (ASHIFT, <MODE>mode, operands) - && INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT + && (INTVAL (operands[3]) & (<MODE_SIZE> * BITS_PER_UNIT - 1)) == 0 && ix86_pre_reload_split ()" "#" "&& 1" @@ -15936,7 +15936,7 @@ (match_operand:QI 2 "register_operand" "c,r")))) (clobber (reg:CC FLAGS_REG))] "ix86_binary_operator_ok (ASHIFT, <MODE>mode, operands) - && INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT + && (INTVAL (operands[3]) & (<MODE_SIZE> * BITS_PER_UNIT - 1)) == 0 && ix86_pre_reload_split ()" "#" "&& 1" @@ -16688,7 +16688,7 @@ (match_operand 2 "int248_register_operand" "c,r")) 0))) (clobber (reg:CC FLAGS_REG))] "ix86_binary_operator_ok (<CODE>, <MODE>mode, operands) - && INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT + && (INTVAL (operands[3]) & (<MODE_SIZE> * BITS_PER_UNIT - 1)) == 0 && ix86_pre_reload_split ()" "#" "&& 1" @@ -16718,7 +16718,7 @@ (match_operand:QI 2 "register_operand" "c,r")))) (clobber (reg:CC FLAGS_REG))] "ix86_binary_operator_ok (<CODE>, <MODE>mode, operands) - && INTVAL (operands[3]) == <MODE_SIZE> * BITS_PER_UNIT + && (INTVAL (operands[3]) & (<MODE_SIZE> * BITS_PER_UNIT - 1)) == 0 && ix86_pre_reload_split ()" "#" "&& 1" |