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| author | Uros Bizjak <ubizjak@gmail.com> | 2023-03-14 18:41:06 +0100 |
|---|---|---|
| committer | Uros Bizjak <ubizjak@gmail.com> | 2023-03-14 18:41:06 +0100 |
| commit | 4bcc3b5cc87505d13cda82846db2e223a9b41f79 (patch) | |
| tree | eaf8e52311c230948c2f014b3ca3519e1e400815 | |
| parent | 7f22d1c83e74c41116300bebac2e4c492c90b03d (diff) | |
| download | gcc-4bcc3b5cc87505d13cda82846db2e223a9b41f79.zip gcc-4bcc3b5cc87505d13cda82846db2e223a9b41f79.tar.gz gcc-4bcc3b5cc87505d13cda82846db2e223a9b41f79.tar.bz2 | |
i386: Use movss to implement V2SImode VEC_PERM.
Perform V2SI vector permutation in the same way as existing V2SF for
TARGET_MMX_WITH_SSE targets. The testcase:
typedef unsigned int v2si __attribute__((vector_size(8)));
v2si foo(v2si x, v2si y) { return (v2si){y[0], x[1]}; }
is currently compiled to (-O2):
foo:
movdqa %xmm0, %xmm2
movdqa %xmm1, %xmm0
pshufd $0xe5, %xmm2, %xmm2
punpckldq %xmm2, %xmm0
ret
and with the patched compiler:
foo:
movss %xmm1, %xmm0
ret
The functionality is already tested in gcc.target/i386/vperm-v2si.c
gcc/ChangeLog:
* config/i386/i386-expand.cc (expand_vec_perm_movs):
Handle V2SImode for TARGET_MMX_WITH_SSE.
* config/i386/mmx.md (*mmx_movss_<mode>): Rename from *mmx_movss
using V2FI mode iterator to handle both V2SI and V2SF modes.
| -rw-r--r-- | gcc/config/i386/i386-expand.cc | 8 | ||||
| -rw-r--r-- | gcc/config/i386/mmx.md | 10 |
2 files changed, 8 insertions, 10 deletions
diff --git a/gcc/config/i386/i386-expand.cc b/gcc/config/i386/i386-expand.cc index 1094ece..6cc8bd5 100644 --- a/gcc/config/i386/i386-expand.cc +++ b/gcc/config/i386/i386-expand.cc @@ -18949,11 +18949,9 @@ expand_vec_perm_movs (struct expand_vec_perm_d *d) if (d->one_operand_p) return false; - if (!(TARGET_SSE && vmode == V4SFmode) - && !(TARGET_SSE && vmode == V4SImode) - && !(TARGET_MMX_WITH_SSE && vmode == V2SFmode) - && !(TARGET_SSE2 && vmode == V2DFmode) - && !(TARGET_SSE2 && vmode == V2DImode)) + if (!(TARGET_SSE && (vmode == V4SFmode || vmode == V4SImode)) + && !(TARGET_MMX_WITH_SSE && (vmode == V2SFmode || vmode == V2SImode)) + && !(TARGET_SSE2 && (vmode == V2DFmode || vmode == V2DImode))) return false; /* Only the first element is changed. */ diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md index 0deccc2..f9c6611 100644 --- a/gcc/config/i386/mmx.md +++ b/gcc/config/i386/mmx.md @@ -1518,11 +1518,11 @@ (set_attr "prefix" "*,maybe_vex,orig") (set_attr "mode" "DI,V4SF,V4SF")]) -(define_insn "*mmx_movss" - [(set (match_operand:V2SF 0 "register_operand" "=x,v") - (vec_merge:V2SF - (match_operand:V2SF 2 "register_operand" " x,v") - (match_operand:V2SF 1 "register_operand" " 0,v") +(define_insn "*mmx_movss_<mode>" + [(set (match_operand:V2FI 0 "register_operand" "=x,v") + (vec_merge:V2FI + (match_operand:V2FI 2 "register_operand" " x,v") + (match_operand:V2FI 1 "register_operand" " 0,v") (const_int 1)))] "TARGET_MMX_WITH_SSE" "@ |