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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-03-07 13:18:56 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-03-07 13:18:56 +0530
commite6ebd4a7d5de4c5afcede367483051e55363b18f (patch)
tree1435fba0893bbff73f314ca2209ead7d919b8ae6 /sysdeps
parent82a9811d29c00161c7c8ea7f70e2cc30988e192e (diff)
downloadglibc-e6ebd4a7d5de4c5afcede367483051e55363b18f.tar.gz
Use an intermediate variable to sum exponents in powerpc __mul and __sqr
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/powerpc/powerpc32/power4/fpu/mpa.c11
-rw-r--r--sysdeps/powerpc/powerpc64/power4/fpu/mpa.c11
2 files changed, 12 insertions, 10 deletions
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/mpa.c b/sysdeps/powerpc/powerpc32/power4/fpu/mpa.c
index ef7ada749a..1858c97407 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/mpa.c
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/mpa.c
@@ -99,16 +99,16 @@ __mul (const mp_no *x, const mp_no *y, mp_no *z, int p)
}
Z[k] = zk;
+ int e = EX + EY;
/* Is there a carry beyond the most significant digit? */
if (Z[1] == ZERO)
{
for (i = 1; i <= p2; i++)
Z[i] = Z[i + 1];
- EZ = EX + EY - 1;
+ e--;
}
- else
- EZ = EX + EY;
+ EZ = e;
Z[0] = X[0] * Y[0];
}
@@ -202,12 +202,13 @@ __sqr (const mp_no *x, mp_no *y, int p)
/* Squares are always positive. */
Y[0] = 1.0;
- EY = 2 * EX;
+ int e = EX * 2;
/* Is there a carry beyond the most significant digit? */
if (__glibc_unlikely (Y[1] == ZERO))
{
for (i = 1; i <= p; i++)
Y[i] = Y[i + 1];
- EY--;
+ e--;
}
+ EY = e;
}
diff --git a/sysdeps/powerpc/powerpc64/power4/fpu/mpa.c b/sysdeps/powerpc/powerpc64/power4/fpu/mpa.c
index ef7ada749a..1858c97407 100644
--- a/sysdeps/powerpc/powerpc64/power4/fpu/mpa.c
+++ b/sysdeps/powerpc/powerpc64/power4/fpu/mpa.c
@@ -99,16 +99,16 @@ __mul (const mp_no *x, const mp_no *y, mp_no *z, int p)
}
Z[k] = zk;
+ int e = EX + EY;
/* Is there a carry beyond the most significant digit? */
if (Z[1] == ZERO)
{
for (i = 1; i <= p2; i++)
Z[i] = Z[i + 1];
- EZ = EX + EY - 1;
+ e--;
}
- else
- EZ = EX + EY;
+ EZ = e;
Z[0] = X[0] * Y[0];
}
@@ -202,12 +202,13 @@ __sqr (const mp_no *x, mp_no *y, int p)
/* Squares are always positive. */
Y[0] = 1.0;
- EY = 2 * EX;
+ int e = EX * 2;
/* Is there a carry beyond the most significant digit? */
if (__glibc_unlikely (Y[1] == ZERO))
{
for (i = 1; i <= p; i++)
Y[i] = Y[i + 1];
- EY--;
+ e--;
}
+ EY = e;
}