Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}.
Ready push to trunk.
gcc/ChangeLog:
* config/i386/sse.md (usdot_prodv*qi): Extend to VI1_AVX512
with vpmaddwd when avxvnni/avx512vnni is not available.
---
gcc/config/i386/sse.md | 55 +++++++++++++++++++++++++++++++-----------
1 file changed, 41 insertions(+), 14 deletions(-)
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 1bf50726e83..f57f36ae380 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -29955,21 +29955,48 @@ (define_insn "vpshldv_<mode>_maskz_1"
(define_expand "usdot_prod<mode>"
[(match_operand:<ssedvecmode> 0 "register_operand")
- (match_operand:VI1_AVX512VNNI 1 "register_operand")
- (match_operand:VI1_AVX512VNNI 2 "register_operand")
+ (match_operand:VI1_AVX512 1 "register_operand")
+ (match_operand:VI1_AVX512 2 "register_operand")
(match_operand:<ssedvecmode> 3 "register_operand")]
- "((<MODE_SIZE> == 64 && TARGET_EVEX512)
- || ((TARGET_AVX512VNNI && TARGET_AVX512VL)
- || TARGET_AVXVNNI))"
-{
- operands[1] = lowpart_subreg (<ssedvecmode>mode,
- force_reg (<MODE>mode, operands[1]),
- <MODE>mode);
- operands[2] = lowpart_subreg (<ssedvecmode>mode,
- force_reg (<MODE>mode, operands[2]),
- <MODE>mode);
- emit_insn (gen_vpdpbusd_<ssedvecmodelower> (operands[0], operands[3],
- operands[1], operands[2]));
+ "TARGET_SSE2"
+{
+ if (<MODE_SIZE> == 64
+ ? TARGET_AVX512VNNI
+ : ((TARGET_AVX512VNNI && TARGET_AVX512VL) || TARGET_AVXVNNI))
+ {
+ operands[1] = lowpart_subreg (<ssedvecmode>mode,
+ force_reg (<MODE>mode, operands[1]),
+ <MODE>mode);
+ operands[2] = lowpart_subreg (<ssedvecmode>mode,
+ force_reg (<MODE>mode, operands[2]),
+ <MODE>mode);
+ emit_insn (gen_vpdpbusd_<ssedvecmodelower> (operands[0], operands[3],
+ operands[1], operands[2]));
+ }
+ else
+ {
+ /* Emulate with vpdpwssd. */
+ rtx op1_lo = gen_reg_rtx (<sseunpackmode>mode);
+ rtx op1_hi = gen_reg_rtx (<sseunpackmode>mode);
+ rtx op2_lo = gen_reg_rtx (<sseunpackmode>mode);
+ rtx op2_hi = gen_reg_rtx (<sseunpackmode>mode);
+
+ emit_insn (gen_vec_unpacku_lo_<mode> (op1_lo, operands[1]));
+ emit_insn (gen_vec_unpacks_lo_<mode> (op2_lo, operands[2]));
+ emit_insn (gen_vec_unpacku_hi_<mode> (op1_hi, operands[1]));
+ emit_insn (gen_vec_unpacks_hi_<mode> (op2_hi, operands[2]));
+
+ rtx res1 = gen_reg_rtx (<ssedvecmode>mode);
+ rtx res2 = gen_reg_rtx (<ssedvecmode>mode);
+ rtx sum = gen_reg_rtx (<ssedvecmode>mode);
+
+ emit_move_insn (sum, CONST0_RTX (<ssedvecmode>mode));
+ emit_insn (gen_sdot_prod<sseunpackmodelower> (res1, op1_lo,
+ op2_lo, sum));
+ emit_insn (gen_sdot_prod<sseunpackmodelower> (res2, op1_hi,
+ op2_hi, operands[3]));
+ emit_insn (gen_add<ssedvecmodelower>3 (operands[0], res1, res2));
+ }
DONE;
})
--
2.31.1
