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GNU C Library master sources branch, master, updated. glibc-2.15-1125-g73a68f9
- From: azanella at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 1 Jun 2012 13:12:57 -0000
- Subject: GNU C Library master sources branch, master, updated. glibc-2.15-1125-g73a68f9
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- Log -----------------------------------------------------------------
http://sources.redhat.com/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=73a68f94d650ac485db6b95242e1cb6591b193d3
commit 73a68f94d650ac485db6b95242e1cb6591b193d3
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Fri Jun 1 10:10:18 2012 -0300
PowerPC: Fix for POWER7 sinf/cosf
This patch fixes some sinf/cosf calculations that generated unexpected
underflows exceptions.
diff --git a/ChangeLog b/ChangeLog
index 6cb9f2d..009e75e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-06-01 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
+
+ * sysdeps/powerpc/fpu/k_cosf.c: Fix underflow generation.
+ * sysdeps/powerpc/fpu/k_sinf.c: Likewise.
+
2012-05-31 H.J. Lu <hongjiu.lu@intel.com>
[BZ #14117]
diff --git a/sysdeps/powerpc/fpu/k_cosf.c b/sysdeps/powerpc/fpu/k_cosf.c
index e2571d6..d5668e3 100644
--- a/sysdeps/powerpc/fpu/k_cosf.c
+++ b/sysdeps/powerpc/fpu/k_cosf.c
@@ -18,6 +18,7 @@
not, see <http://www.gnu.org/licenses/>. */
#include <math.h>
+#include <fenv.h>
#include <math_private.h>
static const float twom27 = 7.4505806e-09;
@@ -40,8 +41,8 @@ __kernel_cosf (float x, float y)
ix = __builtin_fabsf (x);
if (ix < twom27)
{ /* |x| < 2**-27 */
- if (x == 0.0)
- return one;
+ __feraiseexcept (FE_INEXACT);
+ return one;
}
z = x * x;
r = z * (C1 + z * (C2 + z * (C3 + z * (C4 + z * (C5 + z * C6)))));
diff --git a/sysdeps/powerpc/fpu/k_sinf.c b/sysdeps/powerpc/fpu/k_sinf.c
index ab4561e..c8fb8ef 100644
--- a/sysdeps/powerpc/fpu/k_sinf.c
+++ b/sysdeps/powerpc/fpu/k_sinf.c
@@ -18,6 +18,7 @@
not, see <http://www.gnu.org/licenses/>. */
#include <math.h>
+#include <fenv.h>
#include <math_private.h>
@@ -39,8 +40,8 @@ __kernel_sinf (float x, float y, int iy)
ix = __builtin_fabsf (x);
if (ix < twom27)
{ /* |x| < 2**-27 */
- if (x == 0.0)
- return x;
+ __feraiseexcept (FE_INEXACT);
+ return x;
}
z = x * x;
v = z * x;
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 5 +++++
sysdeps/powerpc/fpu/k_cosf.c | 5 +++--
sysdeps/powerpc/fpu/k_sinf.c | 5 +++--
3 files changed, 11 insertions(+), 4 deletions(-)
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