Hello HJ, On 28 июн 07:19, H.J. Lu via Gcc-patches wrote: > Enable FMA in rsqrt<mode>2 expander and fold rsqrtv16sf2 expander into > rsqrt<mode>2 expander which expands to UNSPEC_RSQRT28 for TARGET_AVX512ER. > Although it doesn't show performance change in our workloads, FMA can > improve other workloads. > > gcc/ > > PR target/88713 > * config/i386/i386-expand.c (ix86_emit_swsqrtsf): Enable FMA. > * config/i386/sse.md (VF_AVX512VL_VF1_128_256): New. > (rsqrt<mode>2): Replace VF1_128_256 with VF_AVX512VL_VF1_128_256. > (rsqrtv16sf2): Removed. > > gcc/testsuite/ > > PR target/88713 > * gcc.target/i386/pr88713-1.c: New test. > * gcc.target/i386/pr88713-2.c: Likewise.
So, you've introduced new rsqrt expanders for DF vectors and relaxed condition for V16SF. What I didn't get is why did you change unspec type from RSQRT to RSQRT28 for V16SF expander? -- K
