diff options
Diffstat (limited to 'libc/sysdeps/generic/math_private.h')
| -rw-r--r-- | libc/sysdeps/generic/math_private.h | 63 |
1 files changed, 45 insertions, 18 deletions
diff --git a/libc/sysdeps/generic/math_private.h b/libc/sysdeps/generic/math_private.h index 9d6ecade6..c0fc03d38 100644 --- a/libc/sysdeps/generic/math_private.h +++ b/libc/sysdeps/generic/math_private.h @@ -446,8 +446,8 @@ default_libc_feholdexcept_setround (fenv_t *e, int r) # define libc_feholdexcept_setroundl default_libc_feholdexcept_setround #endif -#ifndef libc_feholdexcept_setround_53bit -# define libc_feholdexcept_setround_53bit libc_feholdexcept_setround +#ifndef libc_feholdsetround_53bit +# define libc_feholdsetround_53bit libc_feholdsetround #endif #ifndef libc_fetestexcept @@ -492,8 +492,8 @@ default_libc_feupdateenv (fenv_t *e) # define libc_feupdateenvl default_libc_feupdateenv #endif -#ifndef libc_feupdateenv_53bit -# define libc_feupdateenv_53bit libc_feupdateenv +#ifndef libc_feresetround_53bit +# define libc_feresetround_53bit libc_feresetround #endif static __always_inline int @@ -553,35 +553,62 @@ default_libc_feupdateenv_test (fenv_t *e, int ex) # define libc_feresetround_noexl libc_fesetenvl #endif +#if HAVE_RM_CTX +/* Set/Restore Rounding Modes only when necessary. If defined, these functions + set/restore floating point state only if the state needed within the lexical + block is different from the current state. This saves a lot of time when + the floating point unit is much slower than the fixed point units. */ + +# ifndef libc_feresetround_noex_ctx +# define libc_feresetround_noex_ctx libc_fesetenv_ctx +# endif +# ifndef libc_feresetround_noexf_ctx +# define libc_feresetround_noexf_ctx libc_fesetenvf_ctx +# endif +# ifndef libc_feresetround_noexl_ctx +# define libc_feresetround_noexl_ctx libc_fesetenvl_ctx +# endif + +# ifndef libc_feholdsetround_53bit_ctx +# define libc_feholdsetround_53bit_ctx libc_feholdsetround_ctx +# endif + +# ifndef libc_feresetround_53bit_ctx +# define libc_feresetround_53bit_ctx libc_feresetround_ctx +# endif + +# define SET_RESTORE_ROUND_GENERIC(RM,ROUNDFUNC,CLEANUPFUNC) \ + struct rm_ctx ctx __attribute__((cleanup(CLEANUPFUNC ## _ctx))); \ + ROUNDFUNC ## _ctx (&ctx, (RM)) +#else +# define SET_RESTORE_ROUND_GENERIC(RM, ROUNDFUNC, CLEANUPFUNC) \ + fenv_t __libc_save_rm __attribute__((cleanup(CLEANUPFUNC))); \ + ROUNDFUNC (&__libc_save_rm, (RM)) +#endif + /* Save and restore the rounding mode within a lexical block. */ #define SET_RESTORE_ROUND(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetround))); \ - libc_feholdsetround (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround, libc_feresetround) #define SET_RESTORE_ROUNDF(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetroundf))); \ - libc_feholdsetroundf (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundf, libc_feresetroundf) #define SET_RESTORE_ROUNDL(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetroundl))); \ - libc_feholdsetroundl (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundl, libc_feresetroundl) /* Save and restore the rounding mode within a lexical block, and also the set of exceptions raised within the block may be discarded. */ #define SET_RESTORE_ROUND_NOEX(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetround_noex))); \ - libc_feholdsetround (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround, libc_feresetround_noex) #define SET_RESTORE_ROUND_NOEXF(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetround_noexf))); \ - libc_feholdsetroundf (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundf, libc_feresetround_noexf) #define SET_RESTORE_ROUND_NOEXL(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feresetround_noexl))); \ - libc_feholdsetroundl (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundl, libc_feresetround_noexl) /* Like SET_RESTORE_ROUND, but also set rounding precision to 53 bits. */ #define SET_RESTORE_ROUND_53BIT(RM) \ - fenv_t __libc_save_rm __attribute__((cleanup(libc_feupdateenv_53bit))); \ - libc_feholdexcept_setround_53bit (&__libc_save_rm, (RM)) + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_53bit, \ + libc_feresetround_53bit) #define __nan(str) \ (__builtin_constant_p (str) && str[0] == '\0' ? NAN : __nan (str)) |