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| author | Rich Felker <dalias@aerifal.cx> | 2013-05-18 12:06:42 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2013-05-18 12:06:42 -0400 |
| commit | 83af1dd65a11f3da3f99ba861248a841c402ccaa (patch) | |
| tree | dece0960d64fb52abcf7a8195bf5082523cea70b /src/math/sincos.c | |
| parent | 69ee9b2cb169ee843ac9e209f919d088499152f7 (diff) | |
| parent | bfda37935867f9bf271d6074db0accf05c63ad10 (diff) | |
| download | musl-83af1dd65a11f3da3f99ba861248a841c402ccaa.tar.gz | |
Merge remote-tracking branch 'nsz/review'
Diffstat (limited to 'src/math/sincos.c')
| -rw-r--r-- | src/math/sincos.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/math/sincos.c b/src/math/sincos.c index 442e285e..49f8a098 100644 --- a/src/math/sincos.c +++ b/src/math/sincos.c @@ -15,7 +15,8 @@ void sincos(double x, double *sin, double *cos) { double y[2], s, c; - uint32_t n, ix; + uint32_t ix; + unsigned n; GET_HIGH_WORD(ix, x); ix &= 0x7fffffff; @@ -24,11 +25,10 @@ void sincos(double x, double *sin, double *cos) if (ix <= 0x3fe921fb) { /* if |x| < 2**-27 * sqrt(2) */ if (ix < 0x3e46a09e) { - /* raise inexact if x != 0 */ - if ((int)x == 0) { - *sin = x; - *cos = 1.0; - } + /* raise inexact if x!=0 and underflow if subnormal */ + FORCE_EVAL(ix < 0x00100000 ? x/0x1p120f : x+0x1p120f); + *sin = x; + *cos = 1.0; return; } *sin = __sin(x, 0.0, 0); |