eece6ba283
AMDGPU has native instructions and target intrinsics for this, but these really should be subject to legalization and generic optimizations. This will enable legalization of f16->f32 on targets without f16 support. Implement a somewhat horrible inline expansion for targets without libcall support. This could be better if we could introduce control flow (GlobalISel version not yet implemented). Support for strictfp legalization is less complete but works for the simple cases.
54 lines
1.6 KiB
LLVM
54 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
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; RUN: llc < %s -mtriple=i386-pc-win32 | FileCheck %s -check-prefix=CHECK-WIN
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define i32 @ldexpf_not_fp(i32 %a, i32 %b) {
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; CHECK-LABEL: ldexpf_not_fp:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq ldexpf@PLT
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; CHECK-NEXT: popq %rcx
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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;
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; CHECK-WIN-LABEL: ldexpf_not_fp:
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; CHECK-WIN: # %bb.0:
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; CHECK-WIN-NEXT: pushl {{[0-9]+}}(%esp)
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; CHECK-WIN-NEXT: pushl {{[0-9]+}}(%esp)
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; CHECK-WIN-NEXT: calll _ldexpf
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; CHECK-WIN-NEXT: addl $8, %esp
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; CHECK-WIN-NEXT: retl
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%result = call i32 @ldexpf(i32 %a, i32 %b) #0
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ret i32 %result
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}
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define float @ldexp_not_int(float %a, float %b) {
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; CHECK-LABEL: ldexp_not_int:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: callq ldexp@PLT
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; CHECK-NEXT: popq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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;
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; CHECK-WIN-LABEL: ldexp_not_int:
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; CHECK-WIN: # %bb.0:
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; CHECK-WIN-NEXT: subl $8, %esp
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; CHECK-WIN-NEXT: flds {{[0-9]+}}(%esp)
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; CHECK-WIN-NEXT: flds {{[0-9]+}}(%esp)
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; CHECK-WIN-NEXT: fstps {{[0-9]+}}(%esp)
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; CHECK-WIN-NEXT: fstps (%esp)
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; CHECK-WIN-NEXT: calll _ldexp
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; CHECK-WIN-NEXT: addl $8, %esp
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; CHECK-WIN-NEXT: retl
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%result = call float @ldexp(float %a, float %b) #0
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ret float %result
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}
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declare i32 @ldexpf(i32, i32) #0
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declare float @ldexp(float, float) #0
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attributes #0 = { nounwind readnone }
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