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By default, LLVM uses the "C" calling convention for all runtime library functions. The half-precision FP conversion functions use the soft-float calling convention, and are needed for some targets which use the hard-float convention by default, so must have their calling convention explicitly set. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215348 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.6 KiB
LLVM
85 lines
2.6 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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; RUN: llc -mattr=+vfp3,+fp16 < %s | FileCheck --check-prefix=CHECK-FP16 %s
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; RUN: llc -mtriple=armv8-eabihf < %s | FileCheck --check-prefix=CHECK-ARMV8 %s
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; RUN: llc -mtriple=thumbv7m-eabi < %s | FileCheck --check-prefix=CHECK-SOFTFLOAT %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32"
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target triple = "armv7---eabihf"
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@x = global i16 12902
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@y = global i16 0
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@z = common global i16 0
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define void @foo() nounwind {
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; CHECK-LABEL: foo:
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; CHECK-FP16-LABEL: foo:
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; CHECK-ARMV8-LABEL: foo:
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; CHECK-SOFTFLOAT-LABEL: foo:
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entry:
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%0 = load i16* @x, align 2
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%1 = load i16* @y, align 2
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%2 = tail call float @llvm.convert.from.fp16.f32(i16 %0)
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; CHECK: __gnu_h2f_ieee
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; CHECK-FP16: vcvtb.f32.f16
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; CHECK-ARMv8: vcvtb.f32.f16
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; CHECK-SOFTFLOAT: __gnu_h2f_ieee
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%3 = tail call float @llvm.convert.from.fp16.f32(i16 %1)
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; CHECK: __gnu_h2f_ieee
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; CHECK-FP16: vcvtb.f32.f16
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; CHECK-ARMV8: vcvtb.f32.f16
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; CHECK-SOFTFLOAT: __gnu_h2f_ieee
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%4 = fadd float %2, %3
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%5 = tail call i16 @llvm.convert.to.fp16.f32(float %4)
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; CHECK: __gnu_f2h_ieee
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; CHECK-FP16: vcvtb.f16.f32
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; CHECK-ARMV8: vcvtb.f16.f32
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; CHECK-SOFTFLOAT: __gnu_f2h_ieee
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store i16 %5, i16* @x, align 2
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ret void
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}
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define double @test_from_fp16(i16 %in) {
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; CHECK-LABEL: test_from_fp16:
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; CHECK-FP16-LABEL: test_from_fp16:
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; CHECK-ARMV8-LABEL: test_from_fp16:
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; CHECK-SOFTFLOAT-LABEL: test_from_fp16:
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%val = call double @llvm.convert.from.fp16.f64(i16 %in)
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; CHECK: bl __gnu_h2f_ieee
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; CHECK: vmov [[TMP:s[0-9]+]], r0
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; CHECK: vcvt.f64.f32 d0, [[TMP]]
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; CHECK-FP16: vmov [[TMP16:s[0-9]+]], r0
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; CHECK-FP16: vcvtb.f32.f16 [[TMP32:s[0-9]+]], [[TMP16]]
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; CHECK-FP16: vcvt.f64.f32 d0, [[TMP32]]
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; CHECK-ARMV8: vmov [[TMP:s[0-9]+]], r0
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; CHECK-ARMV8: vcvtb.f64.f16 d0, [[TMP]]
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; CHECK-SOFTFLOAT: bl __gnu_h2f_ieee
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; CHECK-SOFTFLOAT: bl __aeabi_f2d
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ret double %val
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}
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define i16 @test_to_fp16(double %in) {
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; CHECK-LABEL: test_to_fp16:
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; CHECK-FP16-LABEL: test_to_fp16:
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; CHECK-ARMV8-LABEL: test_to_fp16:
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; CHECK-SOFTFLOAT-LABEL: test_to_fp16:
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%val = call i16 @llvm.convert.to.fp16.f64(double %in)
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; CHECK: bl __aeabi_d2h
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; CHECK-FP16: bl __aeabi_d2h
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; CHECK-ARMV8: vcvtb.f16.f64 [[TMP:s[0-9]+]], d0
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; CHECK-ARMV8: vmov r0, [[TMP]]
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; CHECK-SOFTFLOAT: bl __aeabi_d2h
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ret i16 %val
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}
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declare float @llvm.convert.from.fp16.f32(i16) nounwind readnone
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declare double @llvm.convert.from.fp16.f64(i16) nounwind readnone
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declare i16 @llvm.convert.to.fp16.f32(float) nounwind readnone
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declare i16 @llvm.convert.to.fp16.f64(double) nounwind readnone
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