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| author | Uros Bizjak <ubizjak@gmail.com> | 2022-05-03 17:59:40 +0200 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2022-05-03 18:00:25 +0200 |
| commit | 2680f5eec23805ab8a344f942ca5a7e180d57905 (patch) | |
| tree | da322d19f3197b7717c54c8d10310d3927ad51e4 /gcc | |
| parent | da6d834bc2188e36e876416f25a1aee528c3484d (diff) | |
| download | gcc-2680f5eec23805ab8a344f942ca5a7e180d57905.zip gcc-2680f5eec23805ab8a344f942ca5a7e180d57905.tar.gz gcc-2680f5eec23805ab8a344f942ca5a7e180d57905.tar.bz2 | |
i386: Optimize _mm_storeu_si16 w/o SSE4 [PR105079]
Optimize _mm_storeu_si16 to use MOVD from a SSE to an integer register
instead of PEXTRW from a low word of the SSE register to an integer reg.
Avoid the transformation when optimizing for size for targets without
TARGET_INTER_UNIT_MOVES_FROM_VEC capability, where the transformation
results in two moves via a memory location.
2022-05-03 Uroš Bizjak <ubizjak@gmail.com>
gcc/ChangeLog:
PR target/105079
* config/i386/sse.md (*vec_extract<mode>_0_mem): New pre-reload
define_insn_and_split pattern.
gcc/testsuite/ChangeLog:
PR target/105079
* gcc.target/i386/pr105079.c: New test.
* gcc.target/i386/pr95483-1.c (dg-options): Use -msse4.1.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/sse.md | 20 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr105079.c | 11 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr95483-1.c | 2 |
3 files changed, 32 insertions, 1 deletions
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 5e93aa2..7b791de 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -19021,6 +19021,26 @@ (define_mode_iterator PEXTR_MODE12 [(V16QI "TARGET_SSE4_1") V8HI]) +(define_insn_and_split "*vec_extract<mode>_0_mem" + [(set (match_operand:<ssescalarmode> 0 "memory_operand") + (vec_select:<ssescalarmode> + (match_operand:PEXTR_MODE12 1 "register_operand") + (parallel [(const_int 0)])))] + "TARGET_SSE2 + && !TARGET_SSE4_1 + && (TARGET_INTER_UNIT_MOVES_FROM_VEC + || optimize_function_for_speed_p (cfun)) + && ix86_pre_reload_split ()" + "#" + "&& 1" + [(set (match_dup 2) (match_dup 3)) + (set (match_dup 0) (match_dup 4))] +{ + operands[2] = gen_reg_rtx (SImode); + operands[3] = gen_lowpart (SImode, force_reg (<MODE>mode, operands[1])); + operands[4] = gen_lowpart (<ssescalarmode>mode, operands[2]); +}) + (define_insn "*vec_extract<mode>" [(set (match_operand:<ssescalarmode> 0 "register_sse4nonimm_operand" "=r,m") (vec_select:<ssescalarmode> diff --git a/gcc/testsuite/gcc.target/i386/pr105079.c b/gcc/testsuite/gcc.target/i386/pr105079.c new file mode 100644 index 0000000..4ecf864 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr105079.c @@ -0,0 +1,11 @@ +/* PR target/105079 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -msse2 -mno-sse4.1" } */ +/* { dg-final { scan-assembler-not "pextrw" } } */ + +#include <xmmintrin.h> + +void store16 (void *p, __m128i v) +{ + _mm_storeu_si16 (p, v); +} diff --git a/gcc/testsuite/gcc.target/i386/pr95483-1.c b/gcc/testsuite/gcc.target/i386/pr95483-1.c index 0f3e0bf..26b2e82 100644 --- a/gcc/testsuite/gcc.target/i386/pr95483-1.c +++ b/gcc/testsuite/gcc.target/i386/pr95483-1.c @@ -1,5 +1,5 @@ /* { dg-do compile } */ -/* { dg-options "-O2 -msse2" } */ +/* { dg-options "-O2 -msse4.1" } */ /* { dg-final { scan-assembler-times "pxor\[ \\t\]+\[^\n\]*%xmm\[0-9\]+\[^\n\]*%xmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */ /* { dg-final { scan-assembler-times "pinsrw\[ \\t\]+\[^\n\]*%xmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */ /* { dg-final { scan-assembler-times "pextrw\[ \\t\]+\[^\n\]*%xmm\[0-9\]+\[^\n\]*(?:\n|\[ \\t\]+#)" 1 } } */ |