probinson created this revision.
probinson added reviewers: RKSimon, pengfei.
Herald added a project: All.
probinson requested review of this revision.
https://reviews.llvm.org/D147461
Files:
clang/lib/Headers/immintrin.h
Index: clang/lib/Headers/immintrin.h
===================================================================
--- clang/lib/Headers/immintrin.h
+++ clang/lib/Headers/immintrin.h
@@ -284,18 +284,45 @@
#if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) || \
defined(__RDRND__)
+/// Returns a 16-bit hardware-generated random value.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDRAND </c> instruction.
+///
+/// \param __p
+/// Pointer to a 16-bit location to place the random value.
+/// \returns 1 if the value was successfully generated, 0 otherwise.
static __inline__ int __attribute__((__always_inline__, __nodebug__, __target__("rdrnd")))
_rdrand16_step(unsigned short *__p)
{
return (int)__builtin_ia32_rdrand16_step(__p);
}
+/// Returns a 32-bit hardware-generated random value.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDRAND </c> instruction.
+///
+/// \param __p
+/// Pointer to a 32-bit location to place the random value.
+/// \returns 1 if the value was successfully generated, 0 otherwise.
static __inline__ int __attribute__((__always_inline__, __nodebug__, __target__("rdrnd")))
_rdrand32_step(unsigned int *__p)
{
return (int)__builtin_ia32_rdrand32_step(__p);
}
+/// Returns a 64-bit hardware-generated random value.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDRAND </c> instruction.
+///
+/// \param __p
+/// Pointer to a 64-bit location to place the random value.
+/// \returns 1 if the value was successfully generated, 0 otherwise.
#ifdef __x86_64__
static __inline__ int __attribute__((__always_inline__, __nodebug__, __target__("rdrnd")))
_rdrand64_step(unsigned long long *__p)
@@ -325,48 +352,108 @@
#if !(defined(_MSC_VER) || defined(__SCE__)) || __has_feature(modules) || \
defined(__FSGSBASE__)
#ifdef __x86_64__
+/// Reads the FS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDFSBASE </c> instruction.
+///
+/// \returns The lower 32 bits of the FS base register.
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_readfsbase_u32(void)
{
return __builtin_ia32_rdfsbase32();
}
+/// Reads the FS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDFSBASE </c> instruction.
+///
+/// \returns The contents of the FS base register.
static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_readfsbase_u64(void)
{
return __builtin_ia32_rdfsbase64();
}
+/// Reads the GS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDGSBASE </c> instruction.
+///
+/// \returns The lower 32 bits of the GS base register.
static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_readgsbase_u32(void)
{
return __builtin_ia32_rdgsbase32();
}
+/// Reads the GS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> RDGSBASE </c> instruction.
+///
+/// \returns The contents of the GS base register.
static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_readgsbase_u64(void)
{
return __builtin_ia32_rdgsbase64();
}
+/// Modifies the FS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> WRFSBASE </c> instruction.
+///
+/// \param __V
+/// Value to use for the lower 32 bits of the FS base register.
static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_writefsbase_u32(unsigned int __V)
{
__builtin_ia32_wrfsbase32(__V);
}
+/// Modifies the FS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> WRFSBASE </c> instruction.
+///
+/// \param __V
+/// Value to use for the FS base register.
static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_writefsbase_u64(unsigned long long __V)
{
__builtin_ia32_wrfsbase64(__V);
}
+/// Modifies the GS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> WRGSBASE </c> instruction.
+///
+/// \param __V
+/// Value to use for the lower 32 bits of the GS base register.
static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_writegsbase_u32(unsigned int __V)
{
__builtin_ia32_wrgsbase32(__V);
}
+/// Modifies the GS base register.
+///
+/// \headerfile <immintrin.h>
+///
+/// This intrinsic corresponds to the <c> WRFSBASE </c> instruction.
+///
+/// \param __V
+/// Value to use for GS base register.
static __inline__ void __attribute__((__always_inline__, __nodebug__, __target__("fsgsbase")))
_writegsbase_u64(unsigned long long __V)
{
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