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Use suffixed floating-point constants in float and long double catan/catanh.

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Joseph Myers 2013-04-24 18:59:37 +00:00
parent 2f38fbfe09
commit 77f143fdb4
5 changed files with 34 additions and 28 deletions
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6
ChangeLog
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@ -1,5 +1,11 @@
2013-04-24 Joseph Myers <joseph@codesourcery.com>
* math/s_catanf.c (__catanf): Use suffixed floating-point
constants.
* math/s_catanhf.c (__catanhf): Likewise.
* math/s_catanhl.c (__catanhl): Likewise.
* math/s_catanl.c (__catanl): Likewise.
[BZ #15394]
* math/s_catan.c (__catan): Calculate imaginary part of result
with log1p not log unless computing log of number close to 0.

14
math/s_catanf.c
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@ -67,21 +67,21 @@ __catanf (__complex__ float x)
den = 1 - r2 - __imag__ x * __imag__ x;
__real__ res = 0.5 * __ieee754_atan2f (2.0 * __real__ x, den);
__real__ res = 0.5f * __ieee754_atan2f (2.0f * __real__ x, den);
num = __imag__ x + 1.0;
num = __imag__ x + 1.0f;
num = r2 + num * num;
den = __imag__ x - 1.0;
den = __imag__ x - 1.0f;
den = r2 + den * den;
f = num / den;
if (f < 0.5)
__imag__ res = 0.25 * __ieee754_logf (f);
if (f < 0.5f)
__imag__ res = 0.25f * __ieee754_logf (f);
else
{
num = 4.0 * __imag__ x;
__imag__ res = 0.25 * __log1pf (num / den);
num = 4.0f * __imag__ x;
__imag__ res = 0.25f * __log1pf (num / den);
}
}

14
math/s_catanhf.c
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@ -58,24 +58,24 @@ __catanhf (__complex__ float x)
{
float i2 = __imag__ x * __imag__ x;
float num = 1.0 + __real__ x;
float num = 1.0f + __real__ x;
num = i2 + num * num;
float den = 1.0 - __real__ x;
float den = 1.0f - __real__ x;
den = i2 + den * den;
float f = num / den;
if (f < 0.5)
__real__ res = 0.25 * __ieee754_logf (f);
if (f < 0.5f)
__real__ res = 0.25f * __ieee754_logf (f);
else
{
num = 4.0 * __real__ x;
__real__ res = 0.25 * __log1pf (num / den);
num = 4.0f * __real__ x;
__real__ res = 0.25f * __log1pf (num / den);
}
den = 1 - __real__ x * __real__ x - i2;
__imag__ res = 0.5 * __ieee754_atan2f (2.0 * __imag__ x, den);
__imag__ res = 0.5f * __ieee754_atan2f (2.0f * __imag__ x, den);
}
return res;

14
math/s_catanhl.c
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@ -58,24 +58,24 @@ __catanhl (__complex__ long double x)
{
long double i2 = __imag__ x * __imag__ x;
long double num = 1.0 + __real__ x;
long double num = 1.0L + __real__ x;
num = i2 + num * num;
long double den = 1.0 - __real__ x;
long double den = 1.0L - __real__ x;
den = i2 + den * den;
long double f = num / den;
if (f < 0.5)
__real__ res = 0.25 * __ieee754_logl (f);
if (f < 0.5L)
__real__ res = 0.25L * __ieee754_logl (f);
else
{
num = 4.0 * __real__ x;
__real__ res = 0.25 * __log1pl (num / den);
num = 4.0L * __real__ x;
__real__ res = 0.25L * __log1pl (num / den);
}
den = 1 - __real__ x * __real__ x - i2;
__imag__ res = 0.5 * __ieee754_atan2l (2.0 * __imag__ x, den);
__imag__ res = 0.5L * __ieee754_atan2l (2.0L * __imag__ x, den);
}
return res;

14
math/s_catanl.c
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@ -67,21 +67,21 @@ __catanl (__complex__ long double x)
den = 1 - r2 - __imag__ x * __imag__ x;
__real__ res = 0.5 * __ieee754_atan2l (2.0 * __real__ x, den);
__real__ res = 0.5L * __ieee754_atan2l (2.0L * __real__ x, den);
num = __imag__ x + 1.0;
num = __imag__ x + 1.0L;
num = r2 + num * num;
den = __imag__ x - 1.0;
den = __imag__ x - 1.0L;
den = r2 + den * den;
f = num / den;
if (f < 0.5)
__imag__ res = 0.25 * __ieee754_logl (f);
if (f < 0.5L)
__imag__ res = 0.25L * __ieee754_logl (f);
else
{
num = 4.0 * __imag__ x;
__imag__ res = 0.25 * __log1pl (num / den);
num = 4.0L * __imag__ x;
__imag__ res = 0.25L * __log1pl (num / den);
}
}