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changed pow() a little

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This commit is contained in:
eck 1990-08-28 13:59:36 +00:00
parent a41c51783a
commit bc83231874
1 changed files with 4 additions and 6 deletions
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10
lang/cem/libcc.ansi/math/pow.c
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@ -38,17 +38,15 @@ pow(double x, double y)
x = -x;
}
x = log(x);
if (x < 0) {
x = -x;
y = -y;
}
if (y > M_LN_MAX_D/x) {
/* Beware of overflow in the multiplication */
if (x > 1.0 && y > DBL_MAX/x) {
errno = ERANGE;
return 0;
}
if (y < M_LN_MIN_D/x) {
errno = ERANGE;
return 0;
return result_neg ? -HUGE_VAL : HUGE_VAL;
}
x = exp(x * y);