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GNU C Library master sources branch, master, updated. glibc-2.14-382-ged22dcf

From: drepper at sourceware dot org
To: glibc-cvs at sourceware dot org
Date: 17 Oct 2011 15:27:05 -0000
Subject: GNU C Library master sources branch, master, updated. glibc-2.14-382-ged22dcf
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The branch, master has been updated
       via  ed22dcf691326d148222eb9a215d6d98bb8073a4 (commit)
      from  b171c137687dd4328f756d141d17f30bae750079 (commit)

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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=ed22dcf691326d148222eb9a215d6d98bb8073a4

commit ed22dcf691326d148222eb9a215d6d98bb8073a4
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Mon Oct 17 11:23:40 2011 -0400

    Provide internal optimizations on x86-64 with SSE4.1
    
    Provide macros so that the internal users can, if possible, directly use
    the new instructions.
    
    Also fix up the mathinline.h header when compiling with SSE4.1 enabled.

diff --git a/ChangeLog b/ChangeLog
index 289475c..af72e63 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
 2011-10-17  Ulrich Drepper  <drepper@gmail.com>
 
+	* sysdeps/x86_64/fpu/bits/mathinline.h: Don't define inlines if
+	__NO_MATH_INLINES is defined.  Cleanups.
+
+	* sysdeps/x86_64/fpu/math_private.h: Define __rint, __rintf, __floor,
+	and __floorf is target has SSE4.1.
+	* sysdeps/x86_64/fpu/multiarch/s_floor-c.c: Undef first.
+	* sysdeps/x86_64/fpu/multiarch/s_floorf-c.: Likewise.
+	* sysdeps/x86_64/fpu/multiarch/s_rint-c.c: Likewise.
+	* sysdeps/x86_64/fpu/multiarch/s_rintf-c.c: Likewise.
+
 	* sysdeps/x86_64/fpu/bits/mathinline.h (floor): Use correct function
 	name.
 	(floorf): Likewise.
diff --git a/sysdeps/x86_64/fpu/bits/mathinline.h b/sysdeps/x86_64/fpu/bits/mathinline.h
index 210bef8..721f6e4 100644
--- a/sysdeps/x86_64/fpu/bits/mathinline.h
+++ b/sysdeps/x86_64/fpu/bits/mathinline.h
@@ -30,34 +30,35 @@
 #endif
 
 
-#if defined __GNUC__ && __GNUC__ >= 2
-# ifdef __USE_ISOC99
+/* The gcc, version 2.7 or below, has problems with all this inlining
+   code.  So disable it for this version of the compiler.  */
+#if __GNUC_PREREQ (2, 8) && defined __USE_ISOC99
 __BEGIN_NAMESPACE_C99
 
 /* Test for negative number.  Used in the signbit() macro.  */
 __MATH_INLINE int
 __NTH (__signbitf (float __x))
 {
-#  if __WORDSIZE == 32
+# if __WORDSIZE == 32
   __extension__ union { float __f; int __i; } __u = { __f: __x };
   return __u.__i < 0;
-#  else
+# else
   int __m;
   __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
   return __m & 0x8;
-#  endif
+# endif
 }
 __MATH_INLINE int
 __NTH (__signbit (double __x))
 {
-#  if __WORDSIZE == 32
+# if __WORDSIZE == 32
   __extension__ union { double __d; int __i[2]; } __u = { __d: __x };
   return __u.__i[1] < 0;
-#  else
+# else
   int __m;
   __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x));
   return __m & 0x80;
-#  endif
+# endif
 }
 __MATH_INLINE int
 __NTH (__signbitl (long double __x))
@@ -66,6 +67,16 @@ __NTH (__signbitl (long double __x))
   return (__u.__i[2] & 0x8000) != 0;
 }
 
+__END_NAMESPACE_C99
+#endif
+
+
+#if (__GNUC_PREREQ (2, 8) && !defined __NO_MATH_INLINES \
+     && defined __OPTIMIZE__)
+
+# ifdef __USE_ISOC99
+__BEGIN_NAMESPACE_C99
+
 /* Round to nearest integer.  */
 #  if __WORDSIZE == 64 || defined __SSE_MATH__
 __MATH_INLINE long int
@@ -100,14 +111,10 @@ __NTH (llrint (double __x))
   __asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x));
   return __res;
 }
-
-__END_NAMESPACE_C99
 #  endif
 
 #  if defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0 \
       && (__WORDSIZE == 64 || defined __SSE2_MATH__)
-__BEGIN_NAMESPACE_C99
-
 /* Determine maximum of two values.  */
 __MATH_INLINE float
 __NTH (fmaxf (float __x, float __y))
diff --git a/sysdeps/x86_64/fpu/math_private.h b/sysdeps/x86_64/fpu/math_private.h
index 523ec54..71eb416 100644
--- a/sysdeps/x86_64/fpu/math_private.h
+++ b/sysdeps/x86_64/fpu/math_private.h
@@ -90,3 +90,31 @@ do {								\
   ({ long double __res;							      \
      asm ("fsqrt" : "=t" (__res) : "0" ((long double) d));		      \
      __res; })
+
+#ifdef __SSE4_1__
+# ifndef __rint
+#  define __rint(d) \
+  ({ double __res; \
+     asm ("roundsd $4, %1, %0" : "=x" (__res) : "x" ((double) d));	      \
+     __res; })
+# endif
+# ifndef __rintf
+#  define __rintf(d) \
+  ({ float __res; \
+     asm ("roundss $4, %1, %0" : "=x" (__res) : "x" ((float) d));	      \
+     __res; })
+# endif
+
+# ifndef __floor
+#  define __floor(d) \
+  ({ double __res; \
+     asm ("roundsd $1, %1, %0" : "=x" (__res) : "x" ((double) d));	      \
+     __res; })
+# endif
+# ifndef __floorf
+#  define __floorf(d) \
+  ({ float __res; \
+     asm ("roundss $1, %1, %0" : "=x" (__res) : "x" ((float) d));	      \
+     __res; })
+# endif
+#endif
diff --git a/sysdeps/x86_64/fpu/multiarch/s_floor-c.c b/sysdeps/x86_64/fpu/multiarch/s_floor-c.c
index 8b8c31d..68733b6 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_floor-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_floor-c.c
@@ -1,2 +1,3 @@
+#undef __floor
 #define __floor __floor_c
 #include <sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/s_floorf-c.c b/sysdeps/x86_64/fpu/multiarch/s_floorf-c.c
index 3f36786..2386362 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_floorf-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_floorf-c.c
@@ -1,2 +1,3 @@
+#undef __floorf
 #define __floorf __floorf_c
 #include <sysdeps/ieee754/flt-32/s_floorf.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
index f29f45b..162a630 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
@@ -1,2 +1,3 @@
+#undef __rint
 #define __rint __rint_c
 #include <sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c>
diff --git a/sysdeps/x86_64/fpu/multiarch/s_rintf-c.c b/sysdeps/x86_64/fpu/multiarch/s_rintf-c.c
index 30ed42a..8505249 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_rintf-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_rintf-c.c
@@ -1,2 +1,3 @@
+#undef __rintf
 #define __rintf __rintf_c
 #include <sysdeps/ieee754/flt-32/s_rintf.c>

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                                 |   10 +++++++++
 sysdeps/x86_64/fpu/bits/mathinline.h      |   31 +++++++++++++++++-----------
 sysdeps/x86_64/fpu/math_private.h         |   28 ++++++++++++++++++++++++++
 sysdeps/x86_64/fpu/multiarch/s_floor-c.c  |    1 +
 sysdeps/x86_64/fpu/multiarch/s_floorf-c.c |    1 +
 sysdeps/x86_64/fpu/multiarch/s_rint-c.c   |    1 +
 sysdeps/x86_64/fpu/multiarch/s_rintf-c.c  |    1 +
 7 files changed, 61 insertions(+), 12 deletions(-)


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