[PATCH] D130151: [X86][FP16] Do not split FP64->FP16 to FP64->FP32->FP16

[Phoebe Wang via Phabricator via llvm-commits]

pengfei added inline comments.


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Comment at: llvm/test/CodeGen/X86/vector-half-conversions.ll:727
 ; AVX2-NEXT:    vcvtpd2ps %ymm0, %xmm0
 ; AVX2-NEXT:    vcvtps2ph $0, %xmm0, %xmm0
 ; AVX2-NEXT:    vmovlhps {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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pengfei wrote:
> LuoYuanke wrote:
> > It seems transform from double to float and then float to half. The same for AVX1.
> Good catch! Will investigate.
On non-AVX512 case, the v8f64->v8f16 was firstly split to v4f64->v4f16. Then v4f16 will be widden to v8f16 by another path which I missed to change :(


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  https://reviews.llvm.org/D130151/new/

https://reviews.llvm.org/D130151