diff options
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); |