* sysdeps/alpha/Makefile (sysdep-CFLAGS): Force dynamic rounding. * …

…sysdeps/alpha/fpu/bits/mathinline.h (__signbitl): New. * sysdeps/alpha/fpu/libm-test-ulps: Regenerate. * sysdeps/unix/sysv/linux/alpha/alphaev6/fpu/Implies: New file. * sysdeps/unix/sysv/linux/alpha/alphaev67/fpu/Implies: New file. * sysdeps/unix/sysv/linux/alpha/fpu/Implies: New file. * sysdeps/alpha/Makefile (sysdep-CFLAGS): Force dynamic rounding. * sysdeps/alpha/fpu/bits/mathinline.h (__signbitl): New. * sysdeps/alpha/fpu/libm-test-ulps: Regenerate. * sysdeps/unix/sysv/linux/alpha/alphaev6/fpu/Implies: New file. * sysdeps/unix/sysv/linux/alpha/alphaev67/fpu/Implies: New file. * sysdeps/unix/sysv/linux/alpha/fpu/Implies: New file. 2007-03-13 Richard Henderson <rth@redhat.com>
git-mirror · Mar 14, 2007 · 62789da · 62789da
1 parent a5ea509
commit 62789da
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diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,12 @@
+2007-03-13  Richard Henderson  <rth@redhat.com>
+
+	* sysdeps/alpha/Makefile (sysdep-CFLAGS): Force dynamic rounding.
+	* sysdeps/alpha/fpu/bits/mathinline.h (__signbitl): New.
+	* sysdeps/alpha/fpu/libm-test-ulps: Regenerate.
+	* sysdeps/unix/sysv/linux/alpha/alphaev6/fpu/Implies: New file.
+	* sysdeps/unix/sysv/linux/alpha/alphaev67/fpu/Implies: New file.
+	* sysdeps/unix/sysv/linux/alpha/fpu/Implies: New file.
+
 2007-03-13  Richard Henderson  <rth@redhat.com>
 
         * elf/dl-support.c (_dl_aux_init): Honor DL_PLATFORM_AUXV.

diff --git a/sysdeps/alpha/Makefile b/sysdeps/alpha/Makefile
@@ -38,9 +38,10 @@ ifeq ($(subdir),elf)
 CFLAGS-rtld.c = -mbuild-constants
 endif
 
-# For now, build everything with full IEEE math support.
-# TODO: build separate libm and libm-ieee.
-sysdep-CFLAGS += -mieee
+# Build everything with full IEEE math support, and with dynamic rounding;
+# there are a number of math routines that are defined to work with the
+# "current" rounding mode, and it's easiest to set this with all of them.
+sysdep-CFLAGS += -mieee -mfp-rounding-mode=d
 
 # libc.so requires about 16k for the small data area, which is well
 # below the 64k maximum.

diff --git a/sysdeps/alpha/fpu/bits/mathinline.h b/sysdeps/alpha/fpu/bits/mathinline.h
@@ -178,6 +178,16 @@ __NTH (__signbit (double __x))
   return __u.__i < 0;
 }
 
+__MATH_INLINE int
+__NTH (__signbitl (long double __x))
+{
+  __extension__ union {
+    long double __d;
+    long __i[sizeof(long double)/sizeof(long)];
+  } __u = { __d: __x };
+  return __u.__i[sizeof(long double)/sizeof(long) - 1] < 0;
+}
+
 #endif /* C99 */
 
 #endif /* __NO_MATH_INLINES */