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authorSiddhesh Poyarekar <siddhesh@sourceware.org>2016-10-06 12:54:04 +0530
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2016-10-06 12:54:04 +0530
commitead1ef37d2c3cd998dffb803c43a4fc2d08537ff (patch)
tree67f6cf0fe7edcc2757b22663fc780f32e5c35702 /sysdeps/ieee754
parent5455692aaf604e68d974524f18fc7bbcc97598f2 (diff)
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Make quadrant shift a boolean in reduce_and_compute in s_sin.c
Like the previous change, make the quadrant shift a boolean to make it
clearer that we will do at most a single rotation of the quadrants to
compute the cosine from the sine function.

This does not affect codegen.
Diffstat (limited to 'sysdeps/ieee754')
-rw-r--r--sysdeps/ieee754/dbl-64/s_sin.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_sin.c b/sysdeps/ieee754/dbl-64/s_sin.c
index 67bdebfd6c..26b984d207 100644
--- a/sysdeps/ieee754/dbl-64/s_sin.c
+++ b/sysdeps/ieee754/dbl-64/s_sin.c
@@ -268,11 +268,11 @@ do_sin_slow (double x, double dx, double eps, double *corp)
    by simply rotating the quadrants by 1.  */
 static inline double
 __always_inline
-reduce_and_compute (double x, unsigned int k)
+reduce_and_compute (double x, bool shift_quadrant)
 {
   double retval = 0, a, da;
   unsigned int n = __branred (x, &a, &da);
-  k = (n + k) % 4;
+  int4 k = (n + shift_quadrant) % 4;
   switch (k)
     {
     case 2:
@@ -512,7 +512,7 @@ __sin (double x)
 
 /* -----------------281474976710656 <|x| <2^1024----------------------------*/
   else if (k < 0x7ff00000)
-    retval = reduce_and_compute (x, 0);
+    retval = reduce_and_compute (x, false);
 
 /*--------------------- |x| > 2^1024 ----------------------------------*/
   else
@@ -605,7 +605,7 @@ __cos (double x)
 
   /* 281474976710656 <|x| <2^1024 */
   else if (k < 0x7ff00000)
-    retval = reduce_and_compute (x, 1);
+    retval = reduce_and_compute (x, true);
 
   else
     {