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[X86][SSE] Improve recognition of i64 sitofp conversions that can be performed as i32 (PR29078)
Until AVX512DQ we only support i64/vXi64 sitofp conversion as scalars. This patch sees if the sign bit extends far enough that we can truncate to a i32 type and then perform sitofp without loss of precision. Differential Revision: https://reviews.llvm.org/D24345 llvm-svn: 281502
This commit is contained in:
Simon Pilgrim
parent
ceb19d1df2
commit
5f03f4e898
@ -31234,6 +31234,23 @@ static SDValue combineSIntToFP(SDNode *N, SelectionDAG &DAG,
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return DAG.getNode(ISD::SINT_TO_FP, dl, VT, P);
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}
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// Without AVX512DQ we only support i64 to float scalar conversion. For both
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// vectors and scalars, see if we know that the upper bits are all the sign
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// bit, in which case we can truncate the input to i32 and convert from that.
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if (InVT.getScalarSizeInBits() > 32 && !Subtarget.hasDQI()) {
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unsigned BitWidth = InVT.getScalarSizeInBits();
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unsigned NumSignBits = DAG.ComputeNumSignBits(Op0);
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if (NumSignBits >= (BitWidth - 31)) {
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EVT TruncVT = EVT::getIntegerVT(*DAG.getContext(), 32);
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if (InVT.isVector())
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TruncVT = EVT::getVectorVT(*DAG.getContext(), TruncVT,
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InVT.getVectorNumElements());
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SDLoc dl(N);
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SDValue Trunc = DAG.getNode(ISD::TRUNCATE, dl, TruncVT, Op0);
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return DAG.getNode(ISD::SINT_TO_FP, dl, VT, Trunc);
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}
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}
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// Transform (SINT_TO_FP (i64 ...)) into an x87 operation if we have
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// a 32-bit target where SSE doesn't support i64->FP operations.
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if (!Subtarget.useSoftFloat() && Op0.getOpcode() == ISD::LOAD) {
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@ -9,67 +9,28 @@
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define <2 x double> @mask_sitofp_2i64_2f64(<2 x i64> %a) nounwind {
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; X32-SSE-LABEL: mask_sitofp_2i64_2f64:
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; X32-SSE: # BB#0:
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; X32-SSE-NEXT: pushl %ebp
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; X32-SSE-NEXT: movl %esp, %ebp
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; X32-SSE-NEXT: andl $-8, %esp
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; X32-SSE-NEXT: subl $32, %esp
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X32-SSE-NEXT: pand {{\.LCPI.*}}, %xmm0
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; X32-SSE-NEXT: movq {{.*#+}} xmm1 = xmm0[0],zero
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; X32-SSE-NEXT: movq %xmm1, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X32-SSE-NEXT: movq %xmm0, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstpl {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstpl (%esp)
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; X32-SSE-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
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; X32-SSE-NEXT: movhpd {{.*#+}} xmm0 = xmm0[0],mem[0]
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; X32-SSE-NEXT: movl %ebp, %esp
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; X32-SSE-NEXT: popl %ebp
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; X32-SSE-NEXT: cvtdq2pd %xmm0, %xmm0
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; X32-SSE-NEXT: retl
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;
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; X32-AVX-LABEL: mask_sitofp_2i64_2f64:
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; X32-AVX: # BB#0:
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; X32-AVX-NEXT: pushl %ebp
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; X32-AVX-NEXT: movl %esp, %ebp
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; X32-AVX-NEXT: andl $-8, %esp
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; X32-AVX-NEXT: subl $32, %esp
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; X32-AVX-NEXT: vpand {{\.LCPI.*}}, %xmm0, %xmm0
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; X32-AVX-NEXT: vmovq {{.*#+}} xmm1 = xmm0[0],zero
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; X32-AVX-NEXT: vmovq %xmm1, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X32-AVX-NEXT: vmovq %xmm0, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstpl {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstpl (%esp)
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; X32-AVX-NEXT: vmovsd {{.*#+}} xmm0 = mem[0],zero
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; X32-AVX-NEXT: vmovhpd {{.*#+}} xmm0 = xmm0[0],mem[0]
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; X32-AVX-NEXT: movl %ebp, %esp
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; X32-AVX-NEXT: popl %ebp
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; X32-AVX-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,xmm0[8,9],zero,zero,xmm0[u,u,u,u,u,u,u,u]
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; X32-AVX-NEXT: vcvtdq2pd %xmm0, %xmm0
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; X32-AVX-NEXT: retl
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;
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; X64-SSE-LABEL: mask_sitofp_2i64_2f64:
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; X64-SSE: # BB#0:
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X64-SSE-NEXT: pand {{.*}}(%rip), %xmm0
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; X64-SSE-NEXT: movd %xmm0, %rax
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; X64-SSE-NEXT: cvtsi2sdq %rax, %xmm1
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X64-SSE-NEXT: movd %xmm0, %rax
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; X64-SSE-NEXT: xorps %xmm0, %xmm0
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; X64-SSE-NEXT: cvtsi2sdq %rax, %xmm0
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; X64-SSE-NEXT: unpcklpd {{.*#+}} xmm1 = xmm1[0],xmm0[0]
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; X64-SSE-NEXT: movapd %xmm1, %xmm0
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; X64-SSE-NEXT: cvtdq2pd %xmm0, %xmm0
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; X64-SSE-NEXT: retq
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;
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; X64-AVX-LABEL: mask_sitofp_2i64_2f64:
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; X64-AVX: # BB#0:
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; X64-AVX-NEXT: vpand {{.*}}(%rip), %xmm0, %xmm0
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; X64-AVX-NEXT: vpextrq $1, %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2sdq %rax, %xmm1, %xmm1
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; X64-AVX-NEXT: vmovq %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2sdq %rax, %xmm2, %xmm0
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; X64-AVX-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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; X64-AVX-NEXT: vpshufb {{.*#+}} xmm0 = xmm0[0],zero,zero,zero,xmm0[8,9],zero,zero,xmm0[u,u,u,u,u,u,u,u]
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; X64-AVX-NEXT: vcvtdq2pd %xmm0, %xmm0
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; X64-AVX-NEXT: retq
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%and = and <2 x i64> %a, <i64 255, i64 65535>
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%cvt = sitofp <2 x i64> %and to <2 x double>
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@ -148,73 +109,22 @@ define <2 x double> @mask_uitofp_2i64_2f64(<2 x i64> %a) nounwind {
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define <4 x float> @mask_sitofp_4i64_4f32(<4 x i64> %a) nounwind {
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; X32-SSE-LABEL: mask_sitofp_4i64_4f32:
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; X32-SSE: # BB#0:
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; X32-SSE-NEXT: pushl %ebp
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; X32-SSE-NEXT: movl %esp, %ebp
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; X32-SSE-NEXT: andl $-8, %esp
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; X32-SSE-NEXT: subl $48, %esp
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; X32-SSE-NEXT: pand {{\.LCPI.*}}, %xmm0
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; X32-SSE-NEXT: pand {{\.LCPI.*}}, %xmm1
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; X32-SSE-NEXT: movq %xmm1, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: movq %xmm0, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm1 = xmm1[2,3,0,1]
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; X32-SSE-NEXT: movq %xmm1, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X32-SSE-NEXT: movq %xmm0, {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstps (%esp)
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; X32-SSE-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; X32-SSE-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
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; X32-SSE-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-SSE-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; X32-SSE-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; X32-SSE-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm1[0],xmm2[1],xmm1[1]
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; X32-SSE-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
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; X32-SSE-NEXT: movl %ebp, %esp
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; X32-SSE-NEXT: popl %ebp
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
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; X32-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X32-SSE-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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; X32-SSE-NEXT: cvtdq2ps %xmm0, %xmm0
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; X32-SSE-NEXT: retl
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;
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; X32-AVX-LABEL: mask_sitofp_4i64_4f32:
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; X32-AVX: # BB#0:
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; X32-AVX-NEXT: pushl %ebp
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; X32-AVX-NEXT: movl %esp, %ebp
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; X32-AVX-NEXT: andl $-8, %esp
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; X32-AVX-NEXT: subl $48, %esp
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; X32-AVX-NEXT: vandps {{\.LCPI.*}}, %ymm0, %ymm0
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; X32-AVX-NEXT: vpextrd $1, %xmm0, %eax
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; X32-AVX-NEXT: vpinsrd $1, %eax, %xmm0, %xmm1
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; X32-AVX-NEXT: vmovq %xmm1, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: vpextrd $3, %xmm0, %eax
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; X32-AVX-NEXT: vpshufd {{.*#+}} xmm1 = xmm0[2,3,0,1]
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; X32-AVX-NEXT: vpinsrd $1, %eax, %xmm1, %xmm1
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; X32-AVX-NEXT: vmovq %xmm1, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: vextractf128 $1, %ymm0, %xmm0
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; X32-AVX-NEXT: vpextrd $1, %xmm0, %eax
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; X32-AVX-NEXT: vpinsrd $1, %eax, %xmm0, %xmm1
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; X32-AVX-NEXT: vmovq %xmm1, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: vpextrd $3, %xmm0, %eax
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; X32-AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X32-AVX-NEXT: vpinsrd $1, %eax, %xmm0, %xmm0
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; X32-AVX-NEXT: vmovq %xmm0, {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstps {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fildll {{[0-9]+}}(%esp)
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; X32-AVX-NEXT: fstps (%esp)
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; X32-AVX-NEXT: vmovss {{.*#+}} xmm0 = mem[0],zero,zero,zero
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; X32-AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0],mem[0],xmm0[2,3]
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; X32-AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1],mem[0],xmm0[3]
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; X32-AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm0[0,1,2],mem[0]
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; X32-AVX-NEXT: movl %ebp, %esp
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; X32-AVX-NEXT: popl %ebp
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; X32-AVX-NEXT: vextractf128 $1, %ymm0, %xmm1
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; X32-AVX-NEXT: vpshufd {{.*#+}} xmm1 = xmm1[0,1,0,2]
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; X32-AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X32-AVX-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1,2,3],xmm1[4,5,6,7]
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; X32-AVX-NEXT: vcvtdq2ps %xmm0, %xmm0
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; X32-AVX-NEXT: vzeroupper
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; X32-AVX-NEXT: retl
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;
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@ -222,39 +132,20 @@ define <4 x float> @mask_sitofp_4i64_4f32(<4 x i64> %a) nounwind {
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; X64-SSE: # BB#0:
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; X64-SSE-NEXT: pand {{.*}}(%rip), %xmm0
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; X64-SSE-NEXT: pand {{.*}}(%rip), %xmm1
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; X64-SSE-NEXT: movd %xmm1, %rax
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; X64-SSE-NEXT: cvtsi2ssq %rax, %xmm3
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; X64-SSE-NEXT: movd %xmm0, %rax
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; X64-SSE-NEXT: cvtsi2ssq %rax, %xmm2
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; X64-SSE-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm3[0],xmm2[1],xmm3[1]
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm1 = xmm1[2,3,0,1]
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; X64-SSE-NEXT: movd %xmm1, %rax
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; X64-SSE-NEXT: xorps %xmm1, %xmm1
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; X64-SSE-NEXT: cvtsi2ssq %rax, %xmm1
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[2,3,0,1]
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; X64-SSE-NEXT: movd %xmm0, %rax
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; X64-SSE-NEXT: xorps %xmm0, %xmm0
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; X64-SSE-NEXT: cvtsi2ssq %rax, %xmm0
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; X64-SSE-NEXT: unpcklps {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
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; X64-SSE-NEXT: unpcklps {{.*#+}} xmm2 = xmm2[0],xmm0[0],xmm2[1],xmm0[1]
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; X64-SSE-NEXT: movaps %xmm2, %xmm0
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
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; X64-SSE-NEXT: pshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X64-SSE-NEXT: punpcklqdq {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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; X64-SSE-NEXT: cvtdq2ps %xmm0, %xmm0
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; X64-SSE-NEXT: retq
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;
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; X64-AVX-LABEL: mask_sitofp_4i64_4f32:
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; X64-AVX: # BB#0:
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; X64-AVX-NEXT: vandps {{.*}}(%rip), %ymm0, %ymm0
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; X64-AVX-NEXT: vpextrq $1, %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2ssq %rax, %xmm1, %xmm1
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; X64-AVX-NEXT: vmovq %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2ssq %rax, %xmm2, %xmm2
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; X64-AVX-NEXT: vinsertps {{.*#+}} xmm1 = xmm2[0],xmm1[0],xmm2[2,3]
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; X64-AVX-NEXT: vextractf128 $1, %ymm0, %xmm0
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; X64-AVX-NEXT: vmovq %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2ssq %rax, %xmm3, %xmm2
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; X64-AVX-NEXT: vinsertps {{.*#+}} xmm1 = xmm1[0,1],xmm2[0],xmm1[3]
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; X64-AVX-NEXT: vpextrq $1, %xmm0, %rax
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; X64-AVX-NEXT: vcvtsi2ssq %rax, %xmm3, %xmm0
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; X64-AVX-NEXT: vinsertps {{.*#+}} xmm0 = xmm1[0,1,2],xmm0[0]
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; X64-AVX-NEXT: vextractf128 $1, %ymm0, %xmm1
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; X64-AVX-NEXT: vpshufd {{.*#+}} xmm1 = xmm1[0,1,0,2]
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; X64-AVX-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,2,2,3]
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; X64-AVX-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0,1,2,3],xmm1[4,5,6,7]
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; X64-AVX-NEXT: vcvtdq2ps %xmm0, %xmm0
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; X64-AVX-NEXT: vzeroupper
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; X64-AVX-NEXT: retq
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%and = and <4 x i64> %a, <i64 127, i64 255, i64 4095, i64 65535>
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@ -39,16 +39,16 @@ define void @signum64a(<2 x double>*) {
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; AVX1-NEXT: vxorpd %xmm1, %xmm1, %xmm1
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; AVX1-NEXT: vcmpltpd %xmm1, %xmm0, %xmm2
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; AVX1-NEXT: vpextrq $1, %xmm2, %rax
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; AVX1-NEXT: vcvtsi2sdq %rax, %xmm3, %xmm3
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; AVX1-NEXT: vmovq %xmm2, %rax
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; AVX1-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm2
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; AVX1-NEXT: vunpcklpd {{.*#+}} xmm2 = xmm2[0],xmm3[0]
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; AVX1-NEXT: vmovq %xmm2, %rcx
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; AVX1-NEXT: vmovd %ecx, %xmm2
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; AVX1-NEXT: vpinsrd $1, %eax, %xmm2, %xmm2
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; AVX1-NEXT: vcvtdq2pd %xmm2, %xmm2
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; AVX1-NEXT: vcmpltpd %xmm0, %xmm1, %xmm0
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; AVX1-NEXT: vpextrq $1, %xmm0, %rax
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; AVX1-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm1
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; AVX1-NEXT: vmovq %xmm0, %rax
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; AVX1-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm0
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; AVX1-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
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; AVX1-NEXT: vmovq %xmm0, %rcx
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; AVX1-NEXT: vmovd %ecx, %xmm0
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; AVX1-NEXT: vpinsrd $1, %eax, %xmm0, %xmm0
|
||||
; AVX1-NEXT: vcvtdq2pd %xmm0, %xmm0
|
||||
; AVX1-NEXT: vsubpd %xmm0, %xmm2, %xmm0
|
||||
; AVX1-NEXT: vmovapd %xmm0, (%rdi)
|
||||
; AVX1-NEXT: retq
|
||||
@ -59,16 +59,16 @@ define void @signum64a(<2 x double>*) {
|
||||
; AVX2-NEXT: vxorpd %xmm1, %xmm1, %xmm1
|
||||
; AVX2-NEXT: vcmpltpd %xmm1, %xmm0, %xmm2
|
||||
; AVX2-NEXT: vpextrq $1, %xmm2, %rax
|
||||
; AVX2-NEXT: vcvtsi2sdq %rax, %xmm3, %xmm3
|
||||
; AVX2-NEXT: vmovq %xmm2, %rax
|
||||
; AVX2-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm2
|
||||
; AVX2-NEXT: vunpcklpd {{.*#+}} xmm2 = xmm2[0],xmm3[0]
|
||||
; AVX2-NEXT: vmovq %xmm2, %rcx
|
||||
; AVX2-NEXT: vmovd %ecx, %xmm2
|
||||
; AVX2-NEXT: vpinsrd $1, %eax, %xmm2, %xmm2
|
||||
; AVX2-NEXT: vcvtdq2pd %xmm2, %xmm2
|
||||
; AVX2-NEXT: vcmpltpd %xmm0, %xmm1, %xmm0
|
||||
; AVX2-NEXT: vpextrq $1, %xmm0, %rax
|
||||
; AVX2-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm1
|
||||
; AVX2-NEXT: vmovq %xmm0, %rax
|
||||
; AVX2-NEXT: vcvtsi2sdq %rax, %xmm4, %xmm0
|
||||
; AVX2-NEXT: vunpcklpd {{.*#+}} xmm0 = xmm0[0],xmm1[0]
|
||||
; AVX2-NEXT: vmovq %xmm0, %rcx
|
||||
; AVX2-NEXT: vmovd %ecx, %xmm0
|
||||
; AVX2-NEXT: vpinsrd $1, %eax, %xmm0, %xmm0
|
||||
; AVX2-NEXT: vcvtdq2pd %xmm0, %xmm0
|
||||
; AVX2-NEXT: vsubpd %xmm0, %xmm2, %xmm0
|
||||
; AVX2-NEXT: vmovapd %xmm0, (%rdi)
|
||||
; AVX2-NEXT: retq
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user