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Use __signbit inline. Write 0.0/0.0 for NaN. Fix typo in test for `y

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= 0.5'.
This commit is contained in:
Ulrich Drepper 1997-04-02 14:44:10 +00:00
parent 231e25e2a3
commit 62f075cd3b
1 changed files with 19 additions and 19 deletions
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38
sysdeps/m68k/fpu/e_pow.c
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@ -27,10 +27,12 @@
#define float_type double
#endif
#define __CONCATX(a,b) __CONCAT(a,b)
#define CONCATX(a,b) __CONCAT(a,b)
#define s(name) CONCATX(name,SUFF)
#define m81(func) __m81_u(s(func))
float_type
__CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
s(__ieee754_pow) (float_type x, float_type y)
{
float_type z;
float_type ax;
@ -40,24 +42,24 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
if (x != x || y != y)
return x + y;
if (__m81_u(__CONCATX(__isinf,SUFF)) (y))
if (m81(__isinf) (y))
{
ax = __CONCATX(fabs,SUFF) (x);
ax = s(fabs) (x);
if (ax == 1)
return y - y;
return 0.0/0.0;
if (ax > 1)
return y > 0 ? y : 0;
else
return y < 0 ? -y : 0;
}
if (__CONCATX(fabs,SUFF) (y) == 1)
if (s(fabs) (y) == 1)
return y > 0 ? x : 1 / x;
if (y == 2)
return x * x;
if (y == 0 && x >= 0)
return __m81_u(__CONCATX(__ieee754_sqrt,SUFF)) (x);
if (y == 0.5 && x >= 0)
return m81(__ieee754_sqrt) (x);
if (x == 10.0)
{
@ -70,19 +72,19 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
return z;
}
ax = __CONCATX(fabs,SUFF) (x);
if (__m81_u(__CONCATX(__isinf,SUFF)) (x) || x == 0 || ax == 1)
ax = s(fabs) (x);
if (m81(__isinf) (x) || x == 0 || ax == 1)
{
z = ax;
if (y < 0)
z = 1 / z;
if (signbit (x))
if (m81(__signbit) (x))
{
float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
float_type temp = m81(__rint) (y);
if (y != temp)
{
if (x == -1)
z = (z - z) / (z - z);
z = 0.0/0.0;
}
else
{
@ -105,12 +107,11 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
if (x < 0.0)
{
float_type temp = __m81_u (__CONCATX(__rint,SUFF)) (y);
float_type temp = m81(__rint) (y);
if (y == temp)
{
long long i = (long long) y;
z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (-x)));
z = m81(__ieee754_exp) (y * m81(__ieee754_log) (-x));
if (sizeof (float_type) == sizeof (float))
{
long i = (long) y;
@ -126,10 +127,9 @@ __CONCATX(__ieee754_pow,SUFF) (float_type x, float_type y)
}
}
else
z = (x - x) / (x - x);
z = 0.0/0.0;
}
else
z = (__m81_u(__CONCATX(__ieee754_exp,SUFF))
(y * __m81_u(__CONCATX(__ieee754_log,SUFF)) (x)));
z = m81(__ieee754_exp) (y * m81(__ieee754_log) (x));
return z;
}