diff options
Diffstat (limited to 'sysdeps/x86/isa-level.h')
| -rw-r--r-- | sysdeps/x86/isa-level.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sysdeps/x86/isa-level.h b/sysdeps/x86/isa-level.h index 075e7c6..c6156e7 100644 --- a/sysdeps/x86/isa-level.h +++ b/sysdeps/x86/isa-level.h @@ -87,6 +87,30 @@ when ISA level < 3. */ #define Prefer_No_VZEROUPPER_X86_ISA_LEVEL 3 +/* Both X86_ISA_CPU_FEATURE_USABLE_P and X86_ISA_CPU_FEATURES_ARCH_P + macros are wrappers for the respective CPU_FEATURE{S}_{USABLE|ARCH}_P + runtime checks. They differ in two ways. + + 1. The USABLE_P version is evaluated to true when the feature + is enabled. + + 2. The ARCH_P version has a third argument `not`. The `not` + argument can either be `!` or empty. If the feature is + enabled above an ISA level, the third argument should be empty + and the expression is evaluated to true when the feature is + enabled. If the feature is disabled above an ISA level, the + third argument should be `!` and the expression is evaluated + to true when the feature is disabled. + */ + +#define X86_ISA_CPU_FEATURE_USABLE_P(ptr, name) \ + (((name##_X86_ISA_LEVEL) <= MINIMUM_X86_ISA_LEVEL) \ + || CPU_FEATURE_USABLE_P (ptr, name)) + +#define X86_ISA_CPU_FEATURES_ARCH_P(ptr, name, not) \ + (((name##_X86_ISA_LEVEL) <= MINIMUM_X86_ISA_LEVEL) \ + || not CPU_FEATURES_ARCH_P (ptr, name)) + #define ISA_SHOULD_BUILD(isa_build_level) \ (MINIMUM_X86_ISA_LEVEL <= (isa_build_level) && IS_IN (libc)) \ || defined ISA_DEFAULT_IMPL |