diff options
| author |  Ben Niu <niuben003@gmail.com> | 2022-03-18 13:10:10 -0700 |
|---|---|---|
| committer |  GitHub <noreply@github.com> | 2022-03-18 16:10:10 -0400 |
| commit | 4c015dbb49fcfac25899f3ba7da4be665b5f9aab (patch) | |
| tree | 3c914a0c7e696557705fdab1b79f5f441d82d27d /absl/base/internal/unscaledcycleclock.h | |
| parent | c33f21f86a14216336b87d48e9b552a13985b2bc (diff) | |
Exclude unsupported x64 intrinsics from ARM64EC (#1135)
ARM64EC is a Microsoft-designed ARM64 ABI compatible with AMD64
applications on ARM64 Windows 11. The ARM64EC does not support
_umul128 and __rdtsc as x64 intrinsics, though it provides inline
function implementations for them, by emulation. Since the code
already has portable code paths without using the intrinsics,
instead of using the emulated intrinsic implementations, we use
the said portable code paths for ARM64EC.
Diffstat (limited to 'absl/base/internal/unscaledcycleclock.h')
| -rw-r--r-- | absl/base/internal/unscaledcycleclock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/absl/base/internal/unscaledcycleclock.h b/absl/base/internal/unscaledcycleclock.h index 07f867a6..a4351406 100644 --- a/absl/base/internal/unscaledcycleclock.h +++ b/absl/base/internal/unscaledcycleclock.h @@ -47,7 +47,7 @@ // The following platforms have an implementation of a hardware counter. #if defined(__i386__) || defined(__x86_64__) || defined(__aarch64__) || \ defined(__powerpc__) || defined(__ppc__) || defined(__riscv) || \ - defined(_M_IX86) || defined(_M_X64) + defined(_M_IX86) || (defined(_M_X64) && !defined(_M_ARM64EC)) #define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 1 #else #define ABSL_HAVE_UNSCALED_CYCLECLOCK_IMPLEMENTATION 0 |