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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2016-09-01 22:11:00 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2016-09-02 20:08:41 +0530 |
| commit | 25e440c6c7b32da8720a5a18cec0d5322f7eccd0 (patch) | |
| tree | a07479761316316ddba7715c5adbc6d8040aeda2 /sysdeps | |
| parent | 758e79ec89c4e285bafcef601702cd27790fd78e (diff) | |
| download | glibc-25e440c6c7b32da8720a5a18cec0d5322f7eccd0.tar.gz glibc-25e440c6c7b32da8720a5a18cec0d5322f7eccd0.tar.xz glibc-25e440c6c7b32da8720a5a18cec0d5322f7eccd0.zip | |
Use do_sin for sin(x) where 0.25 < |x| < 0.855469
The only code looks slightly different from do_sin but on closer examination, should give exactly the same result. Drop it in favour of the do_sin function call. * sysdeps/ieee754/dbl-64/s_sin.c (__sin): Use do_sin.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_sin.c | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_sin.c b/sysdeps/ieee754/dbl-64/s_sin.c index 888270f91d..7196e6433e 100644 --- a/sysdeps/ieee754/dbl-64/s_sin.c +++ b/sysdeps/ieee754/dbl-64/s_sin.c @@ -443,7 +443,7 @@ SECTION #endif __sin (double x) { - double xx, res, t, cor, y, s, c, sn, ssn, cs, ccs; + double xx, res, t, cor; mynumber u; int4 k, m; double retval = 0; @@ -473,23 +473,8 @@ __sin (double x) /*---------------------------- 0.25<|x|< 0.855469---------------------- */ else if (k < 0x3feb6000) { - u.x = big + fabs (x); - y = fabs (x) - (u.x - big); - y = (x > 0 ? y : -y); - - xx = y * y; - s = y + y * xx * (sn3 + xx * sn5); - c = xx * (cs2 + xx * (cs4 + xx * cs6)); - 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; - retval = (res == res + 1.096 * cor) ? res : slow1 (x); + res = do_sin (x, 0, &cor); + retval = (res == res + 1.096 * cor) ? (m > 0 ? res : -res) : slow1 (x); } /* else if (k < 0x3feb6000) */ /*----------------------- 0.855469 <|x|<2.426265 ----------------------*/ |