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; 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) nounwind {
; X32-SSE-LABEL: t1:
; X32-SSE: # %bb.0:
; X32-SSE-NEXT: xorps {{\.LCPI.*}}, %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) 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.
; Make sure that we're flipping the sign bit and only the sign bit of each float.
; So instead of something like this:
; movd %rdi, %xmm0
; xorps .LCPI2_0(%rip), %xmm0
;
; We should generate:
; movabsq (put sign bit mask in integer register))
; xorq (flip sign bits)
; movd (move to xmm return register)
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: movq %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
}
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