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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-10-12 16:24:44 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2017-10-17 12:01:22 -0200 |
| commit | 4e17c78e4a5da41b3cfefdd49ab760b051b65029 (patch) | |
| tree | 5edb6ba088bb680dea2f232c369bd1c4d5fb7e3d /sysdeps/x86/init-arch.h | |
| parent | 56a752ab6aa89088a787d852358cdd8f0a0d57f1 (diff) | |
| download | glibc-4e17c78e4a5da41b3cfefdd49ab760b051b65029.tar.gz glibc-4e17c78e4a5da41b3cfefdd49ab760b051b65029.tar.xz glibc-4e17c78e4a5da41b3cfefdd49ab760b051b65029.zip | |
Add common ifunc-init.h header
This patch moves the generic definition from x86_64 init-arch to a common header ifunc-init.h. No functional changes is expected. Checked on a x86_64-linux-gnu build. * sysdeps/generic/ifunc-init.h: New file. * sysdeps/x86/init-arch.h: Use generic ifunc-init.h.
Diffstat (limited to 'sysdeps/x86/init-arch.h')
| -rw-r--r-- | sysdeps/x86/init-arch.h | 41 |
1 files changed, 1 insertions, 40 deletions
diff --git a/sysdeps/x86/init-arch.h b/sysdeps/x86/init-arch.h index 15d3f0975d..06a21cc249 100644 --- a/sysdeps/x86/init-arch.h +++ b/sysdeps/x86/init-arch.h @@ -20,46 +20,7 @@ #else # include <ldsodefs.h> #endif - -/* These macros are used to implement ifunc selection in C. To implement - an ifunc function, foo, which returns the address of __foo_sse2 or - __foo_avx2: - - #define foo __redirect_foo - #define __foo __redirect___foo - #include <foo.h> - #undef foo - #undef __foo - #define SYMBOL_NAME foo - #include <init-arch.h> - - extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; - extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden; - - static inline void * - foo_selector (void) - { - if (use AVX2) - return OPTIMIZE (avx2); - - return OPTIMIZE (sse2); - } - - libc_ifunc_redirected (__redirect_foo, foo, foo_selector ()); - -*/ - -#define PASTER1(x,y) x##_##y -#define EVALUATOR1(x,y) PASTER1 (x,y) -#define PASTER2(x,y) __##x##_##y -#define EVALUATOR2(x,y) PASTER2 (x,y) - -/* Basically set '__redirect_<symbol>' to use as type definition, - '__<symbol>_<variant>' as the optimized implementation and - '<symbol>_ifunc_selector' as the IFUNC selector. */ -#define REDIRECT_NAME EVALUATOR1 (__redirect, SYMBOL_NAME) -#define OPTIMIZE(name) EVALUATOR2 (SYMBOL_NAME, name) -#define IFUNC_SELECTOR EVALUATOR1 (SYMBOL_NAME, ifunc_selector) +#include <ifunc-init.h> #ifndef __x86_64__ /* Due to the reordering and the other nifty extensions in i686, it is |