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[ARM] ACLE FP16 feature test macros

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This is a partial recommit of r327189 that was reverted
due to test issues. I.e., this recommits minimal functional
change, the FP16 feature test macros, and adds tests that 
were missing in the original commit.

llvm-svn: 327455
This commit is contained in:
Sjoerd Meijer 2018-03-13 22:11:06 +00:00
parent cc060e921b
commit a7463df6e2
3 changed files with 25 additions and 0 deletions
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12
clang/lib/Basic/Targets/ARM.cpp
View File

@ -379,6 +379,7 @@ bool ARMTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
Unaligned = 1;
SoftFloat = SoftFloatABI = false;
HWDiv = 0;
HasFullFP16 = 0;
// This does not diagnose illegal cases like having both
// "+vfpv2" and "+vfpv3" or having "+neon" and "+fp-only-sp".
@ -419,6 +420,8 @@ bool ARMTargetInfo::handleTargetFeatures(std::vector<std::string> &Features,
Unaligned = 0;
} else if (Feature == "+fp16") {
HW_FP |= HW_FP_HP;
} else if (Feature == "+fullfp16") {
HasFullFP16 = 1;
}
}
HW_FP &= ~HW_FP_remove;
@ -710,6 +713,15 @@ void ARMTargetInfo::getTargetDefines(const LangOptions &Opts,
if (Opts.UnsafeFPMath)
Builder.defineMacro("__ARM_FP_FAST", "1");
// Armv8.2-A FP16 vector intrinsic
if ((FPU & NeonFPU) && HasFullFP16)
Builder.defineMacro("__ARM_FEATURE_FP16_VECTOR_ARITHMETIC", "1");
// Armv8.2-A FP16 scalar intrinsics
if (HasFullFP16)
Builder.defineMacro("__ARM_FEATURE_FP16_SCALAR_ARITHMETIC", "1");
switch (ArchKind) {
default:
break;

1
clang/lib/Basic/Targets/ARM.h
View File

@ -69,6 +69,7 @@ class LLVM_LIBRARY_VISIBILITY ARMTargetInfo : public TargetInfo {
unsigned Crypto : 1;
unsigned DSP : 1;
unsigned Unaligned : 1;
unsigned HasFullFP16 : 1;
enum {
LDREX_B = (1 << 0), /// byte (8-bit)

12
clang/test/Preprocessor/arm-target-features.c
View File

@ -19,6 +19,18 @@
// CHECK-V8A-ALLOW-FP-INSTR: #define __ARM_FP16_ARGS 1
// CHECK-V8A-ALLOW-FP-INSTR: #define __ARM_FP16_FORMAT_IEEE 1
// RUN: %clang -target arm-none-linux-gnueabi -march=armv8.2a+fp16 -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-FULLFP16-VECTOR-SCALAR %s
// CHECK-FULLFP16-VECTOR-SCALAR: #define __ARM_FEATURE_FP16_SCALAR_ARITHMETIC 1
// CHECK-FULLFP16-VECTOR-SCALAR: #define __ARM_FEATURE_FP16_VECTOR_ARITHMETIC 1
// CHECK-FULLFP16-VECTOR-SCALAR: #define __ARM_FP 0xe
// CHECK-FULLFP16-VECTOR-SCALAR: #define __ARM_FP16_FORMAT_IEEE 1
// RUN: %clang -target arm-none-linux-gnueabi -march=armv8.2a+fp16 -mfpu=vfp4 -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-FULLFP16-SCALAR %s
// CHECK-FULLFP16-SCALAR: #define __ARM_FEATURE_FP16_SCALAR_ARITHMETIC 1
// CHECK-FULLFP16-SCALAR-NOT: #define __ARM_FEATURE_FP16_VECTOR_ARITHMETIC 1
// CHECK-FULLFP16-SCALAR: #define __ARM_FP 0xe
// CHECK-FULLFP16-SCALAR: #define __ARM_FP16_FORMAT_IEEE 1
// RUN: %clang -target armv8r-none-linux-gnu -x c -E -dM %s -o - | FileCheck -match-full-lines --check-prefix=CHECK-V8R %s
// CHECK-V8R: #define __ARMEL__ 1
// CHECK-V8R: #define __ARM_ARCH 8