Use VEX encoding in inline math functions on x86-64 when possible

This commit is contained in:
Ulrich Drepper 2011-10-25 08:17:57 -04:00
parent 16437fece4
commit 31ea014d8b
2 changed files with 142 additions and 48 deletions

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@ -1,3 +1,7 @@
2011-10-25 Ulrich Drepper <drepper@gmail.com>
* sysdeps/x86_64/fpu/math_private.h: Use VEX encoding when possible.
2011-10-25 Andreas Schwab <schwab@redhat.com>
* elf/dl-deps.c (_dl_map_object_deps): Remove always true

View File

@ -1,59 +1,67 @@
#ifndef _MATH_PRIVATE_H
#define math_opt_barrier(x) \
({ __typeof(x) __x; \
if (sizeof (x) <= sizeof (double)) \
__asm ("" : "=x" (__x) : "0" (x)); \
else \
__asm ("" : "=t" (__x) : "0" (x)); \
__x; })
({ __typeof(x) __x; \
if (sizeof (x) <= sizeof (double)) \
__asm ("" : "=x" (__x) : "0" (x)); \
else \
__asm ("" : "=t" (__x) : "0" (x)); \
__x; })
#define math_force_eval(x) \
do \
{ \
if (sizeof (x) <= sizeof (double)) \
__asm __volatile ("" : : "x" (x)); \
else \
__asm __volatile ("" : : "f" (x)); \
} \
while (0)
do { \
if (sizeof (x) <= sizeof (double)) \
__asm __volatile ("" : : "x" (x)); \
else \
__asm __volatile ("" : : "f" (x)); \
} while (0)
#include <math/math_private.h>
/* We can do a few things better on x86-64. */
#ifdef __AVX__
# define MOVD "vmovd"
#else
# define MOVD "movd"
#endif
/* Direct movement of float into integer register. */
#undef EXTRACT_WORDS64
#define EXTRACT_WORDS64(i,d) \
do { \
long int i_; \
asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \
(i) = i_; \
} while (0)
#define EXTRACT_WORDS64(i, d) \
do { \
long int i_; \
asm (MOVD " %1, %0" : "=rm" (i_) : "x" ((double) (d))); \
(i) = i_; \
} while (0)
/* And the reverse. */
#undef INSERT_WORDS64
#define INSERT_WORDS64(d,i) \
do { \
long int i_ = i; \
asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \
} while (0)
#define INSERT_WORDS64(d, i) \
do { \
long int i_ = i; \
double d__; \
asm (MOVD " %1, %0" : "=x" (d__) : "rm" (i_)); \
d = d__; \
} while (0)
/* Direct movement of float into integer register. */
#undef GET_FLOAT_WORD
#define GET_FLOAT_WORD(i,d) \
do { \
int i_; \
asm ("movd %1, %0" : "=rm" (i_) : "x" (d)); \
(i) = i_; \
} while (0)
#define GET_FLOAT_WORD(i, d) \
do { \
int i_; \
asm (MOVD " %1, %0" : "=rm" (i_) : "x" ((float) (d))); \
(i) = i_; \
} while (0)
/* And the reverse. */
#undef SET_FLOAT_WORD
#define SET_FLOAT_WORD(d,i) \
do { \
int i_ = i; \
asm ("movd %1, %0" : "=x" (d) : "rm" (i_)); \
} while (0)
#define SET_FLOAT_WORD(f, i) \
do { \
int i_ = i; \
float f__; \
asm (MOVD " %1, %0" : "=x" (f__) : "rm" (i_)); \
f = f__; \
} while (0)
#endif
@ -78,14 +86,25 @@ do { \
({ int __di; GET_FLOAT_WORD (__di, (float) d); \
(__di & 0x7fffffff) < 0x7f800000; })
#define __ieee754_sqrt(d) \
#ifdef __AVX__
# define __ieee754_sqrt(d) \
({ double __res; \
asm ("vsqrtsd %1, %0, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
# define __ieee754_sqrtf(d) \
({ float __res; \
asm ("vsqrtss %1, %0, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
#else
# define __ieee754_sqrt(d) \
({ double __res; \
asm ("sqrtsd %1, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
#define __ieee754_sqrtf(d) \
# define __ieee754_sqrtf(d) \
({ float __res; \
asm ("sqrtss %1, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
#endif
#define __ieee754_sqrtl(d) \
({ long double __res; \
asm ("fsqrt" : "=t" (__res) : "0" ((long double) (d))); \
@ -93,29 +112,57 @@ do { \
#ifdef __SSE4_1__
# ifndef __rint
# define __rint(d) \
# ifdef __AVX__
# define __rint(d) \
({ double __res; \
asm ("vroundsd $4, %1, %0, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
# else
# define __rint(d) \
({ double __res; \
asm ("roundsd $4, %1, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
# endif
# endif
# ifndef __rintf
# define __rintf(d) \
# ifdef __AVX__
# define __rintf(d) \
({ float __res; \
asm ("vroundss $4, %1, %0, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
# else
# define __rintf(d) \
({ float __res; \
asm ("roundss $4, %1, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
# endif
# endif
# ifndef __floor
# define __floor(d) \
# ifdef __AVX__
# define __floor(d) \
({ double __res; \
asm ("vroundsd $1, %1, %0, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
# else
# define __floor(d) \
({ double __res; \
asm ("roundsd $1, %1, %0" : "=x" (__res) : "xm" ((double) (d))); \
__res; })
# endif
# endif
# ifndef __floorf
# define __floorf(d) \
# ifdef __AVX__
# define __floorf(d) \
({ float __res; \
asm ("vroundss $1, %1, %0, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
# else
# define __floorf(d) \
({ float __res; \
asm ("roundss $1, %1, %0" : "=x" (__res) : "xm" ((float) (d))); \
__res; })
# endif
# endif
#endif
@ -146,7 +193,17 @@ do { \
// #define libc_fesetroundl(r) (void) fesetround (r)
#undef libc_feholdexcept
#define libc_feholdexcept(e) \
#ifdef __AVX__
# define libc_feholdexcept(e) \
do { \
unsigned int mxcsr; \
asm ("vstmxcsr %0" : "=m" (*&mxcsr)); \
(e)->__mxcsr = mxcsr; \
mxcsr = (mxcsr | 0x1f80) & ~0x3f; \
asm volatile ("vldmxcsr %0" : : "m" (*&mxcsr)); \
} while (0)
#else
# define libc_feholdexcept(e) \
do { \
unsigned int mxcsr; \
asm ("stmxcsr %0" : "=m" (*&mxcsr)); \
@ -154,12 +211,23 @@ do { \
mxcsr = (mxcsr | 0x1f80) & ~0x3f; \
asm volatile ("ldmxcsr %0" : : "m" (*&mxcsr)); \
} while (0)
#endif
#undef libc_feholdexceptf
#define libc_feholdexceptf(e) libc_feholdexcept (e)
// #define libc_feholdexceptl(e) (void) feholdexcept (e)
#undef libc_feholdexcept_setround
#define libc_feholdexcept_setround(e, r) \
#ifdef __AVX__
# define libc_feholdexcept_setround(e, r) \
do { \
unsigned int mxcsr; \
asm ("vstmxcsr %0" : "=m" (*&mxcsr)); \
(e)->__mxcsr = mxcsr; \
mxcsr = ((mxcsr | 0x1f80) & ~0x603f) | ((r) << 3); \
asm volatile ("vldmxcsr %0" : : "m" (*&mxcsr)); \
} while (0)
#else
# define libc_feholdexcept_setround(e, r) \
do { \
unsigned int mxcsr; \
asm ("stmxcsr %0" : "=m" (*&mxcsr)); \
@ -167,33 +235,55 @@ do { \
mxcsr = ((mxcsr | 0x1f80) & ~0x603f) | ((r) << 3); \
asm volatile ("ldmxcsr %0" : : "m" (*&mxcsr)); \
} while (0)
#endif
#undef libc_feholdexcept_setroundf
#define libc_feholdexcept_setroundf(e, r) libc_feholdexcept_setround (e, r)
// #define libc_feholdexcept_setroundl(e, r) ...
#undef libc_fetestexcept
#define libc_fetestexcept(e) \
({ unsigned int mxcsr; asm volatile ("stmxcsr %0" : "=m" (*&mxcsr)); \
#ifdef __AVX__
# define libc_fetestexcept(e) \
({ unsigned int mxcsr; asm volatile ("vstmxcsr %0" : "=m" (*&mxcsr)); \
mxcsr & (e) & FE_ALL_EXCEPT; })
#else
# define libc_fetestexcept(e) \
({ unsigned int mxcsr; asm volatile ("stmxcsr %0" : "=m" (*&mxcsr)); \
mxcsr & (e) & FE_ALL_EXCEPT; })
#endif
#undef libc_fetestexceptf
#define libc_fetestexceptf(e) libc_fetestexcept (e)
// #define libc_fetestexceptl(e) fetestexcept (e)
#undef libc_fesetenv
#define libc_fesetenv(e) \
#ifdef __AVX__
# define libc_fesetenv(e) \
asm volatile ("vldmxcsr %0" : : "m" ((e)->__mxcsr))
#else
# define libc_fesetenv(e) \
asm volatile ("ldmxcsr %0" : : "m" ((e)->__mxcsr))
#endif
#undef libc_fesetenvf
#define libc_fesetenvf(e) libc_fesetenv (e)
// #define libc_fesetenvl(e) (void) fesetenv (e)
#undef libc_feupdateenv
#define libc_feupdateenv(e) \
#ifdef __AVX__
# define libc_feupdateenv(e) \
do { \
unsigned int mxcsr; \
asm volatile ("vstmxcsr %0" : "=m" (*&mxcsr)); \
asm volatile ("vldmxcsr %0" : : "m" ((e)->__mxcsr)); \
__feraiseexcept (mxcsr & FE_ALL_EXCEPT); \
} while (0)
#else
# define libc_feupdateenv(e) \
do { \
unsigned int mxcsr; \
asm volatile ("stmxcsr %0" : "=m" (*&mxcsr)); \
asm volatile ("ldmxcsr %0" : : "m" ((e)->__mxcsr)); \
__feraiseexcept (mxcsr & FE_ALL_EXCEPT); \
} while (0)
#endif
#undef libc_feupdateenvf
#define libc_feupdateenvf(e) libc_feupdateenv (e)
// #define libc_feupdateenvl(e) (void) feupdateenv (e)