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8bb6665d2a
Summary: This is an improvement over the two pshufbs and punpcklqdq we'd get otherwise. Reviewers: RKSimon, spatel Reviewed By: RKSimon Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D54671 llvm-svn: 347171
42 lines
1.4 KiB
LLVM
42 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s
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define <4 x i32> @trunc_64_32(<4 x i64> %A) nounwind uwtable readnone ssp{
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; CHECK-LABEL: trunc_64_32:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm1
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; CHECK-NEXT: vshufps {{.*#+}} xmm0 = xmm0[0,2],xmm1[0,2]
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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%B = trunc <4 x i64> %A to <4 x i32>
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ret <4 x i32>%B
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}
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define <8 x i16> @trunc_32_16(<8 x i32> %A) nounwind uwtable readnone ssp{
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; CHECK-LABEL: trunc_32_16:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm1
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; CHECK-NEXT: vmovdqa {{.*#+}} xmm2 = [0,1,4,5,8,9,12,13,8,9,12,13,12,13,14,15]
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; CHECK-NEXT: vpshufb %xmm2, %xmm1, %xmm1
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; CHECK-NEXT: vpshufb %xmm2, %xmm0, %xmm0
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; CHECK-NEXT: vpunpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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%B = trunc <8 x i32> %A to <8 x i16>
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ret <8 x i16>%B
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}
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define <16 x i8> @trunc_16_8(<16 x i16> %A) nounwind uwtable readnone ssp{
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; CHECK-LABEL: trunc_16_8:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vandps {{.*}}(%rip), %ymm0, %ymm0
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; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm1
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; CHECK-NEXT: vpackuswb %xmm1, %xmm0, %xmm0
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: retq
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%B = trunc <16 x i16> %A to <16 x i8>
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ret <16 x i8> %B
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}
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