diff options
Diffstat (limited to 'test/CodeGen/X86/vec_fneg.ll')
| -rw-r--r-- | test/CodeGen/X86/vec_fneg.ll | 99 |
1 files changed, 77 insertions, 22 deletions
diff --git a/test/CodeGen/X86/vec_fneg.ll b/test/CodeGen/X86/vec_fneg.ll index a85ae984d8e6..78799ff04fe1 100644 --- a/test/CodeGen/X86/vec_fneg.ll +++ b/test/CodeGen/X86/vec_fneg.ll @@ -1,25 +1,43 @@ -; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=sse | FileCheck %s +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse | FileCheck %s --check-prefix=X32-SSE --check-prefix=X32-SSE1 +; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X32-SSE --check-prefix=X32-SSE2 +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse2 | FileCheck %s --check-prefix=X64-SSE --check-prefix=X64-SSE1 +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64-SSE --check-prefix=X64-SSE2 ; FNEG is defined as subtraction from -0.0. ; This test verifies that we use an xor with a constant to flip the sign bits; no subtraction needed. -define <4 x float> @t1(<4 x float> %Q) { -; CHECK-LABEL: t1: -; CHECK: xorps {{.*}}LCPI0_0{{.*}}, %xmm0 -; CHECK-NEXT: retq - %tmp = fsub <4 x float> < float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00 >, %Q - ret <4 x float> %tmp +define <4 x float> @t1(<4 x float> %Q) nounwind { +; X32-SSE-LABEL: t1: +; X32-SSE: # BB#0: +; X32-SSE-NEXT: xorps .LCPI0_0, %xmm0 +; X32-SSE-NEXT: retl +; +; X64-SSE-LABEL: t1: +; X64-SSE: # BB#0: +; X64-SSE-NEXT: xorps {{.*}}(%rip), %xmm0 +; X64-SSE-NEXT: retq + %tmp = fsub <4 x float> < float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00 >, %Q + ret <4 x float> %tmp } ; This test verifies that we generate an FP subtraction because "0.0 - x" is not an fneg. -define <4 x float> @t2(<4 x float> %Q) { -; CHECK-LABEL: t2: -; CHECK: xorps %[[X:xmm[0-9]+]], %[[X]] -; CHECK-NEXT: subps %xmm0, %[[X]] -; CHECK-NEXT: movaps %[[X]], %xmm0 -; CHECK-NEXT: retq - %tmp = fsub <4 x float> zeroinitializer, %Q - ret <4 x float> %tmp +define <4 x float> @t2(<4 x float> %Q) nounwind { +; X32-SSE-LABEL: t2: +; X32-SSE: # BB#0: +; X32-SSE-NEXT: xorps %xmm1, %xmm1 +; X32-SSE-NEXT: subps %xmm0, %xmm1 +; X32-SSE-NEXT: movaps %xmm1, %xmm0 +; X32-SSE-NEXT: retl +; +; X64-SSE-LABEL: t2: +; X64-SSE: # BB#0: +; X64-SSE-NEXT: xorps %xmm1, %xmm1 +; X64-SSE-NEXT: subps %xmm0, %xmm1 +; X64-SSE-NEXT: movaps %xmm1, %xmm0 +; X64-SSE-NEXT: retq + %tmp = fsub <4 x float> zeroinitializer, %Q + ret <4 x float> %tmp } ; If we're bitcasting an integer to an FP vector, we should avoid the FPU/vector unit entirely. @@ -31,14 +49,51 @@ define <4 x float> @t2(<4 x float> %Q) { ; We should generate: ; movabsq (put sign bit mask in integer register)) ; xorq (flip sign bits) -; movd (move to xmm return register) +; movd (move to xmm return register) -define <2 x float> @fneg_bitcast(i64 %i) { -; CHECK-LABEL: fneg_bitcast: -; CHECK: movabsq $-9223372034707292160, %rax # imm = 0x8000000080000000 -; CHECK-NEXT: xorq %rdi, %rax -; CHECK-NEXT: movd %rax, %xmm0 -; CHECK-NEXT: retq +define <2 x float> @fneg_bitcast(i64 %i) nounwind { +; X32-SSE1-LABEL: fneg_bitcast: +; X32-SSE1: # BB#0: +; X32-SSE1-NEXT: pushl %ebp +; X32-SSE1-NEXT: movl %esp, %ebp +; X32-SSE1-NEXT: andl $-16, %esp +; X32-SSE1-NEXT: subl $32, %esp +; X32-SSE1-NEXT: movl $-2147483648, %eax # imm = 0x80000000 +; X32-SSE1-NEXT: movl 12(%ebp), %ecx +; X32-SSE1-NEXT: xorl %eax, %ecx +; X32-SSE1-NEXT: movl %ecx, {{[0-9]+}}(%esp) +; X32-SSE1-NEXT: xorl 8(%ebp), %eax +; X32-SSE1-NEXT: movl %eax, (%esp) +; X32-SSE1-NEXT: movaps (%esp), %xmm0 +; X32-SSE1-NEXT: movl %ebp, %esp +; X32-SSE1-NEXT: popl %ebp +; X32-SSE1-NEXT: retl +; +; X32-SSE2-LABEL: fneg_bitcast: +; X32-SSE2: # BB#0: +; X32-SSE2-NEXT: movl $-2147483648, %eax # imm = 0x80000000 +; X32-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx +; X32-SSE2-NEXT: xorl %eax, %ecx +; X32-SSE2-NEXT: movd %ecx, %xmm1 +; X32-SSE2-NEXT: xorl {{[0-9]+}}(%esp), %eax +; X32-SSE2-NEXT: movd %eax, %xmm0 +; X32-SSE2-NEXT: punpckldq {{.*#+}} xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1] +; X32-SSE2-NEXT: retl +; +; X64-SSE1-LABEL: fneg_bitcast: +; X64-SSE1: # BB#0: +; X64-SSE1-NEXT: movabsq $-9223372034707292160, %rax # imm = 0x8000000080000000 +; X64-SSE1-NEXT: xorq %rdi, %rax +; X64-SSE1-NEXT: movq %rax, -{{[0-9]+}}(%rsp) +; X64-SSE1-NEXT: movaps -{{[0-9]+}}(%rsp), %xmm0 +; X64-SSE1-NEXT: retq +; +; X64-SSE2-LABEL: fneg_bitcast: +; X64-SSE2: # BB#0: +; X64-SSE2-NEXT: movabsq $-9223372034707292160, %rax # imm = 0x8000000080000000 +; X64-SSE2-NEXT: xorq %rdi, %rax +; X64-SSE2-NEXT: movd %rax, %xmm0 +; X64-SSE2-NEXT: retq %bitcast = bitcast i64 %i to <2 x float> %fneg = fsub <2 x float> <float -0.0, float -0.0>, %bitcast ret <2 x float> %fneg |