Hi!
This is either AVX2 or for EVEX AVX512BW (& AVX512VL) instruction,
thus the patch adds it as a separate alternative guarded with avx512bw
isa attribute.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2016-05-13 Jakub Jelinek
* config/i386/sse.md (avx2_pmaddubsw256, ssse3_pmaddubsw128): Add
avx512bw alternative.
* gcc.target/i386/avx512bw-vpmaddubsw-3.c: New test.
--- gcc/config/i386/sse.md.jj 2016-05-13 13:58:12.384020131 +0200
+++ gcc/config/i386/sse.md 2016-05-13 14:46:03.563465879 +0200
@@ -13933,12 +13933,12 @@ (define_insn "ssse3_ph
+
+void
+f1 (__m128i x, __m128i y)
+{
+ register __m128i a __asm ("xmm16"), b __asm ("xmm17");
+ a = x;
+ b = y;
+ asm volatile ("" : "+v" (a), "+v" (b));
+ a = _mm_maddubs_epi16 (a, b);
+ asm volatile ("" : "+v" (a));
+}
+
+/* { dg-final { scan-assembler
"vpmaddubsw\[^\n\r]*xmm1\[67]\[^\n\r]*xmm1\[67]\[^\n\r]*xmm1\[67]" } } */
+
+void
+f2 (__m256i x, __m256i y)
+{
+ register __m256i a __asm ("xmm16"), b __asm ("xmm17");
+ a = x;
+ b = y;
+ asm volatile ("" : "+v" (a), "+v" (b));
+ a = _mm256_maddubs_epi16 (a, b);
+ asm volatile ("" : "+v" (a));
+}
+
+/* { dg-final { scan-assembler
"vpmaddubsw\[^\n\r]*ymm1\[67]\[^\n\r]*ymm1\[67]\[^\n\r]*ymm1\[67]" } } */
Jakub
