search for: cvttss2si

...to in the target layer so I can find where the sequence is emitted. > > > $ more llvm/lib/Target/X86//README-X86-64.txt > … > Are we better off using branches instead of cmove to implement FP to > unsigned i64? > > _conv: > ucomiss LC0(%rip), %xmm0 > cvttss2siq %xmm0, %rdx > jb L3 > subss LC0(%rip), %xmm0 > movabsq $-9223372036854775808, %rax > cvttss2siq %xmm0, %rdx > xorq %rax, %rdx > L3: > movq %rdx, %rax > ret > > instead of > > _conv:...

...m trying to figure out what the cast gets renamed to in the target layer so I can find where the sequence is emitted. $ more llvm/lib/Target/X86//README-X86-64.txt … Are we better off using branches instead of cmove to implement FP to unsigned i64? _conv: ucomiss LC0(%rip), %xmm0 cvttss2siq %xmm0, %rdx jb L3 subss LC0(%rip), %xmm0 movabsq $-9223372036854775808, %rax cvttss2siq %xmm0, %rdx xorq %rax, %rdx L3: movq %rdx, %rax ret instead of _conv: movss LCPI1_0(%rip), %xmm1 cvttss2siq %xmm0...

...m trying to figure out what the cast gets renamed to in the target layer so I can find where the sequence is emitted. $ more llvm/lib/Target/X86//README-X86-64.txt … Are we better off using branches instead of cmove to implement FP to unsigned i64? _conv: ucomiss LC0(%rip), %xmm0 cvttss2siq %xmm0, %rdx jb L3 subss LC0(%rip), %xmm0 movabsq $-9223372036854775808, %rax cvttss2siq %xmm0, %rdx xorq %rax, %rdx L3: movq %rdx, %rax ret instead of _conv: movss LCPI1_0(%rip), %xmm1 cvttss2siq %xmm0...

...12; } define i32 @foo(float %x) { %cmp = fcmp olt float %x, 4.200000e+01 %conv = fptosi float %x to i32 %ret = select i1 %cmp, i32 %conv, i32 12 ret i32 %ret } $ clang -O2 cmovfp.c -S -o - movss LCPI0_0(%rip), %xmm1 ## xmm1 = mem[0],zero,zero,zero ucomiss %xmm0, %xmm1 cvttss2si %xmm0, %ecx movl $12, %eax cmoval %ecx, %eax retq On Thu, May 11, 2017 at 1:28 PM, Kaylor, Andrew via llvm-dev < llvm-dev at lists.llvm.org> wrote: > Hi Michael, > > > > To be honest I haven’t started working on FP to integer conversions for > FENV_A...

...fcmp olt float %x, 4.200000e+01 > %conv = fptosi float %x to i32 > %ret = select i1 %cmp, i32 %conv, i32 12 > ret i32 %ret > } > > $ clang -O2 cmovfp.c -S -o - > movss LCPI0_0(%rip), %xmm1 ## xmm1 = mem[0],zero,zero,zero > ucomiss %xmm0, %xmm1 > cvttss2si %xmm0, %ecx > movl $12, %eax > cmoval %ecx, %eax > retq > > > > On Thu, May 11, 2017 at 1:28 PM, Kaylor, Andrew via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Hi Michael, > > > > To be honest I haven’t started working on...

Hi Andy, I’m interested to try out your patches… I understand the scope of FENV_ACCESS is relatively wide, however I’m still curious if you managed to figure out how to prevent the SelectionDAGLegalize::ExpandNode() FP_TO_UINT lowering of the FPToUI intrinsic from producing the predicate logic that incorrectly sets the floating point accrued exceptions due to unconditional execution of the