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-rw-r--r--ChangeLog14
-rw-r--r--sysdeps/ieee754/dbl-64/s_sin.c149
2 files changed, 49 insertions, 114 deletions
diff --git a/ChangeLog b/ChangeLog
index 3245378..e664599 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
2013-09-19 Siddhesh Poyarekar <siddhesh@redhat.com>
+ * sysdeps/ieee754/dbl-64/s_sin.c (SINCOS_TABLE_LOOKUP): New
+ macro.
+ (__sin): Use it.
+ (__cos): Likewise.
+ (slow1): Likewise.
+ (slow2): Likewise.
+ (sloww1): Likewise.
+ (sloww2): Likewise.
+ (bsloww1): Likewise.
+ (bsloww2): Likewise.
+ (cslow2): Likewise.
+ (csloww1): Likewise.
+ (csloww2): Likewise.
+
* sysdeps/ieee754/dbl-64/s_sin.c (reduce_and_compute): New
function.
(__sin): Use it.
diff --git a/sysdeps/ieee754/dbl-64/s_sin.c b/sysdeps/ieee754/dbl-64/s_sin.c
index 93ad8d7..6c1475b 100644
--- a/sysdeps/ieee754/dbl-64/s_sin.c
+++ b/sysdeps/ieee754/dbl-64/s_sin.c
@@ -55,6 +55,15 @@
#include <math_private.h>
#include <fenv.h>
+#define SINCOS_TABLE_LOOKUP(u, sn, ssn, cs, ccs) \
+({ \
+ int4 k = u.i[LOW_HALF] << 2; \
+ sn = __sincostab.x[k]; \
+ ssn = __sincostab.x[k + 1]; \
+ cs = __sincostab.x[k + 2]; \
+ ccs = __sincostab.x[k + 3]; \
+})
+
#ifndef SECTION
# define SECTION
#endif
@@ -166,11 +175,12 @@ __sin (double x)
xx = y * y;
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = (m > 0) ? __sincostab.x[k] : -__sincostab.x[k];
- ssn = (m > 0) ? __sincostab.x[k + 1] : -__sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
+ if (m <= 0)
+ {
+ sn = -sn;
+ ssn = -ssn;
+ }
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -195,11 +205,7 @@ __sin (double x)
xx = y * y;
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ccs - s * ssn - cs * c) - sn * s;
res = cs + cor;
cor = (cs - res) + cor;
@@ -258,11 +264,7 @@ __sin (double x)
xx = y * y;
s = y + (db + y * xx * (sn3 + xx * sn5));
c = y * db + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -282,11 +284,7 @@ __sin (double x)
u.x = big.x + a;
y = a - (u.x - big.x) + da;
xx = y * y;
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
cor = (ccs - s * ssn - cs * c) - sn * s;
@@ -356,11 +354,7 @@ __sin (double x)
xx = y * y;
s = y + (db + y * xx * (sn3 + xx * sn5));
c = y * db + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -380,11 +374,7 @@ __sin (double x)
u.x = big.x + a;
y = a - (u.x - big.x) + da;
xx = y * y;
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
cor = (ccs - s * ssn - cs * c) - sn * s;
@@ -447,11 +437,7 @@ __cos (double x)
xx = y * y;
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ccs - s * ssn - cs * c) - sn * s;
res = cs + cor;
cor = (cs - res) + cor;
@@ -492,11 +478,7 @@ __cos (double x)
xx = y * y;
s = y + (db + y * xx * (sn3 + xx * sn5));
c = y * db + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -558,11 +540,7 @@ __cos (double x)
xx = y * y;
s = y + (db + y * xx * (sn3 + xx * sn5));
c = y * db + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -582,11 +560,7 @@ __cos (double x)
u.x = big.x + a;
y = a - (u.x - big.x) + da;
xx = y * y;
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
cor = (ccs - s * ssn - cs * c) - sn * s;
@@ -654,11 +628,7 @@ __cos (double x)
xx = y * y;
s = y + (db + y * xx * (sn3 + xx * sn5));
c = y * db + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
cor = (ssn + s * ccs - sn * c) + cs * s;
res = sn + cor;
cor = (sn - res) + cor;
@@ -678,11 +648,7 @@ __cos (double x)
u.x = big.x + a;
y = a - (u.x - big.x) + da;
xx = y * y;
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
s = y + y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
cor = (ccs - s * ssn - cs * c) - sn * s;
@@ -754,18 +720,13 @@ slow1 (double x)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, c1, c2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
y = y - (u.x - big.x);
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k]; /* Data */
- ssn = __sincostab.x[k + 1]; /* from */
- cs = __sincostab.x[k + 2]; /* tables */
- ccs = __sincostab.x[k + 3]; /* __sincostab.tbl */
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = y - y1;
c1 = (cs + t22) - t22;
@@ -798,7 +759,6 @@ slow2 (double x)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, e1, e2, xx, cor, res, del;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
y = hp0.x - y;
if (y >= 0)
@@ -816,11 +776,7 @@ slow2 (double x)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = y * del + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + del;
e1 = (sn + t22) - t22;
@@ -937,7 +893,6 @@ sloww1 (double x, double dx, double orig)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, c1, c2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -946,11 +901,7 @@ sloww1 (double x, double dx, double orig)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
c1 = (cs + t22) - t22;
@@ -998,7 +949,6 @@ sloww2 (double x, double dx, double orig, int n)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, e1, e2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1007,11 +957,7 @@ sloww2 (double x, double dx, double orig, int n)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = y * dx + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
@@ -1102,7 +1048,6 @@ bsloww1 (double x, double dx, double orig, int n)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, c1, c2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1111,11 +1056,7 @@ bsloww1 (double x, double dx, double orig, int n)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
c1 = (cs + t22) - t22;
@@ -1158,7 +1099,6 @@ bsloww2 (double x, double dx, double orig, int n)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, e1, e2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1167,11 +1107,7 @@ bsloww2 (double x, double dx, double orig, int n)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = y * dx + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
@@ -1213,7 +1149,6 @@ cslow2 (double x)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, e1, e2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1221,11 +1156,7 @@ cslow2 (double x)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = y - y1;
e1 = (sn + t22) - t22;
@@ -1346,7 +1277,6 @@ csloww1 (double x, double dx, double orig)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, c1, c2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1355,11 +1285,7 @@ csloww1 (double x, double dx, double orig)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
c1 = (cs + t22) - t22;
@@ -1406,7 +1332,6 @@ csloww2 (double x, double dx, double orig, int n)
mynumber u;
double sn, ssn, cs, ccs, s, c, w[2], y, y1, y2, e1, e2, xx, cor, res;
static const double t22 = 6291456.0;
- int4 k;
y = ABS (x);
u.x = big.x + y;
@@ -1415,11 +1340,7 @@ csloww2 (double x, double dx, double orig, int n)
xx = y * y;
s = y * xx * (sn3 + xx * sn5);
c = y * dx + xx * (cs2 + xx * (cs4 + xx * cs6));
- k = u.i[LOW_HALF] << 2;
- sn = __sincostab.x[k];
- ssn = __sincostab.x[k + 1];
- cs = __sincostab.x[k + 2];
- ccs = __sincostab.x[k + 3];
+ SINCOS_TABLE_LOOKUP (u, sn, ssn, cs, ccs);
y1 = (y + t22) - t22;
y2 = (y - y1) + dx;
generated by cgit v1.1 at 2024-11-21 21:57:05 +0000