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ARM: __gnu_h2f_ieee and __gnu_f2h_ieee always use the soft-float calling convention
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
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@ -388,6 +388,19 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
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setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
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}
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// The half <-> float conversion functions are always soft-float, but are
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// needed for some targets which use a hard-float calling convention by
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// default.
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if (Subtarget->isAAPCS_ABI()) {
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setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_AAPCS);
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setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_AAPCS);
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setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_AAPCS);
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} else {
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setLibcallCallingConv(RTLIB::FPROUND_F32_F16, CallingConv::ARM_APCS);
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setLibcallCallingConv(RTLIB::FPROUND_F64_F16, CallingConv::ARM_APCS);
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setLibcallCallingConv(RTLIB::FPEXT_F16_F32, CallingConv::ARM_APCS);
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}
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if (Subtarget->isThumb1Only())
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addRegisterClass(MVT::i32, &ARM::tGPRRegClass);
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else
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@ -1,16 +1,16 @@
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; 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-eabi < %s | FileCheck --check-prefix=CHECK-ARMV8 %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-eabi"
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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 arm_aapcs_vfpcc void @foo() nounwind {
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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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@ -38,9 +38,9 @@ entry:
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ret void
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}
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define arm_aapcs_vfpcc double @test_from_fp16(i16 %in) {
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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-FP-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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@ -60,15 +60,15 @@ define arm_aapcs_vfpcc double @test_from_fp16(i16 %in) {
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ret double %val
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}
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define arm_aapcs_vfpcc i16 @test_to_fp16(double %in) {
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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-FP-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 __truncdfhf2
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; CHECK: bl __aeabi_d2h
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; CHECK-FP16: bl __truncdfhf2
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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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