From bd37f2ee314147c69a39817d590149cf1181ef47 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Sun, 18 Mar 2012 15:58:00 -0700
Subject: Optimize private 387 fenv access; share code between i386 and x86_64.

---
 sysdeps/x86_64/fpu/math_private.h | 120 +-------------------------------------
 1 file changed, 1 insertion(+), 119 deletions(-)

(limited to 'sysdeps/x86_64')

diff --git a/sysdeps/x86_64/fpu/math_private.h b/sysdeps/x86_64/fpu/math_private.h
index aa208b2e18..67c5f6a324 100644
--- a/sysdeps/x86_64/fpu/math_private.h
+++ b/sysdeps/x86_64/fpu/math_private.h
@@ -1,33 +1,12 @@
 #ifndef X86_64_MATH_PRIVATE_H
 #define X86_64_MATH_PRIVATE_H 1
 
-#include <fenv.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; })
-#define math_force_eval(x) \
-  do {									      \
-    if (sizeof (x) <= sizeof (double))					      \
-      __asm __volatile ("" : : "x" (x));				      \
-    else								      \
-      __asm __volatile ("" : : "f" (x));				      \
-  } while (0)
-
 /* We can do a few things better on x86-64.  */
 
 #if defined __AVX__ || defined SSE2AVX
 # define MOVD "vmovd"
-# define STMXCSR "vstmxcsr"
-# define LDMXCSR "vldmxcsr"
 #else
 # define MOVD "movd"
-# define STMXCSR "stmxcsr"
-# define LDMXCSR "ldmxcsr"
 #endif
 
 /* Direct movement of float into integer register.  */
@@ -64,104 +43,7 @@
     f = f__;								      \
   } while (0)
 
-/* Specialized variants of the <fenv.h> interfaces which only handle
-   either the FPU or the SSE unit.  */
-static __always_inline void
-libc_feholdexcept (fenv_t *e)
-{
-  unsigned int mxcsr;
-  asm (STMXCSR " %0" : "=m" (*&mxcsr));
-  e->__mxcsr = mxcsr;
-  mxcsr = (mxcsr | 0x1f80) & ~0x3f;
-  asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr));
-}
-#define libc_feholdexcept  libc_feholdexcept
-#define libc_feholdexceptf libc_feholdexcept
-
-static __always_inline void
-libc_feholdexcept_setround (fenv_t *e, int r)
-{
-  unsigned int mxcsr;
-  asm (STMXCSR " %0" : "=m" (*&mxcsr));
-  e->__mxcsr = mxcsr;
-  mxcsr = ((mxcsr | 0x1f80) & ~0x603f) | (r << 3);
-  asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr));
-}
-#define libc_feholdexcept_setround  libc_feholdexcept_setround
-#define libc_feholdexcept_setroundf libc_feholdexcept_setround
-
-static __always_inline int
-libc_fetestexcept (int e)
-{
-  unsigned int mxcsr;
-  asm volatile (STMXCSR " %0" : "=m" (*&mxcsr));
-  return mxcsr & e & FE_ALL_EXCEPT;
-}
-#define libc_fetestexcept  libc_fetestexcept
-#define libc_fetestexceptf libc_fetestexcept
-
-static __always_inline void
-libc_fesetenv (fenv_t *e)
-{
-  asm volatile (LDMXCSR " %0" : : "m" (e->__mxcsr));
-}
-#define libc_fesetenv  libc_fesetenv
-#define libc_fesetenvf libc_fesetenv
-
-static __always_inline int
-libc_feupdateenv_test (fenv_t *e, int ex)
-{
-  unsigned int mxcsr, old_mxcsr, cur_ex;
-  asm volatile (STMXCSR " %0" : "=m" (*&mxcsr));
-  cur_ex = mxcsr & FE_ALL_EXCEPT;
-
-  /* Merge current exceptions with the old environment.  */
-  old_mxcsr = e->__mxcsr;
-  mxcsr = old_mxcsr | cur_ex;
-  asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr));
-
-  /* Raise SIGFPE for any new exceptions since the hold.  Expect that
-     the normal environment has all exceptions masked.  */
-  if (__builtin_expect ((old_mxcsr >> 7) & cur_ex, 0))
-    __feraiseexcept (cur_ex);
-
-  /* Test for exceptions raised since the hold.  */
-  return cur_ex & ex;
-}
-#define libc_feupdateenv_test  libc_feupdateenv_test
-#define libc_feupdateenv_testf libc_feupdateenv_test
-
-static __always_inline void
-libc_feupdateenv (fenv_t *e)
-{
-  libc_feupdateenv_test (e, 0);
-}
-#define libc_feupdateenv  libc_feupdateenv
-#define libc_feupdateenvf libc_feupdateenv
-
-static __always_inline void
-libc_feholdsetround (fenv_t *e, int r)
-{
-  unsigned int mxcsr;
-  asm (STMXCSR " %0" : "=m" (*&mxcsr));
-  e->__mxcsr = mxcsr;
-  mxcsr = (mxcsr & ~0x6000) | (r << 3);
-  asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr));
-}
-#define libc_feholdsetround  libc_feholdsetround
-#define libc_feholdsetroundf libc_feholdsetround
-
-static __always_inline void
-libc_feresetround (fenv_t *e)
-{
-  unsigned int mxcsr;
-  asm (STMXCSR " %0" : "=m" (*&mxcsr));
-  mxcsr = (mxcsr & ~0x6000) | (e->__mxcsr & 0x6000);
-  asm volatile (LDMXCSR " %0" : : "m" (*&mxcsr));
-}
-#define libc_feresetround  libc_feresetround
-#define libc_feresetroundf libc_feresetround
-
+#include <sysdeps/i386/fpu/fenv_private.h>
 #include_next <math_private.h>
 
 extern __always_inline double
-- 
cgit 1.4.1