diff options
| -rw-r--r-- | src/atan2.c | 22 | ||||
| -rw-r--r-- | src/pow.c | 12 |
2 files changed, 17 insertions, 17 deletions
diff --git a/src/atan2.c b/src/atan2.c index 070788935..8c14c91c1 100644 --- a/src/atan2.c +++ b/src/atan2.c @@ -67,17 +67,17 @@ mpfr_atan2 (mpfr_ptr dest, mpfr_srcptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode) /* atan2(0, 0) does not raise the "invalid" floating-point exception, nor does atan2(y, 0) raise the "divide-by-zero" floating-point exception. - -- atan2(±0, -0) returns ±pi.313) - -- atan2(±0, +0) returns ±0. - -- atan2(±0, x) returns ±pi, for x < 0. - -- atan2(±0, x) returns ±0, for x > 0. - -- atan2(y, ±0) returns -pi/2 for y < 0. - -- atan2(y, ±0) returns pi/2 for y > 0. - -- atan2(±oo, -oo) returns ±3pi/4. - -- atan2(±oo, +oo) returns ±pi/4. - -- atan2(±oo, x) returns ±pi/2, for finite x. - -- atan2(±y, -oo) returns ±pi, for finite y > 0. - -- atan2(±y, +oo) returns ±0, for finite y > 0. + -- atan2(±0, -0) returns ±pi.313) + -- atan2(±0, +0) returns ±0. + -- atan2(±0, x) returns ±pi, for x < 0. + -- atan2(±0, x) returns ±0, for x > 0. + -- atan2(y, ±0) returns -pi/2 for y < 0. + -- atan2(y, ±0) returns pi/2 for y > 0. + -- atan2(±oo, -oo) returns ±3pi/4. + -- atan2(±oo, +oo) returns ±pi/4. + -- atan2(±oo, x) returns ±pi/2, for finite x. + -- atan2(±y, -oo) returns ±pi, for finite y > 0. + -- atan2(±y, +oo) returns ±0, for finite y > 0. */ if (MPFR_IS_NAN (x) || MPFR_IS_NAN (y)) { @@ -392,13 +392,13 @@ mpfr_pow_general (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y, /* The computation of z = pow(x,y) is done by z = exp(y * log(x)) = x^y For the special cases, see Section F.9.4.4 of the C standard: - _ pow(±0, y) = ±inf for y an odd integer < 0. - _ pow(±0, y) = +inf for y < 0 and not an odd integer. - _ pow(±0, y) = ±0 for y an odd integer > 0. - _ pow(±0, y) = +0 for y > 0 and not an odd integer. - _ pow(-1, ±inf) = 1. + _ pow(±0, y) = ±inf for y an odd integer < 0. + _ pow(±0, y) = +inf for y < 0 and not an odd integer. + _ pow(±0, y) = ±0 for y an odd integer > 0. + _ pow(±0, y) = +0 for y > 0 and not an odd integer. + _ pow(-1, ±inf) = 1. _ pow(+1, y) = 1 for any y, even a NaN. - _ pow(x, ±0) = 1 for any x, even a NaN. + _ pow(x, ±0) = 1 for any x, even a NaN. _ pow(x, y) = NaN for finite x < 0 and finite non-integer y. _ pow(x, -inf) = +inf for |x| < 1. _ pow(x, -inf) = +0 for |x| > 1. |