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Raise invalid exception for NaN result. 

Use __m81_test.
This commit is contained in:
Ulrich Drepper 1997-05-07 15:26:29 +00:00
parent 08c2dbb9a2
commit 4291e75751
1 changed files with 18 additions and 14 deletions
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32
sysdeps/m68k/fpu/e_pow.c
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@ -36,29 +36,33 @@ s(__ieee754_pow) (float_type x, float_type y)
{
float_type z;
float_type ax;
unsigned long x_cond, y_cond;
if (y == 0.0)
y_cond = __m81_test (y);
if (y_cond & __M81_COND_ZERO)
return 1.0;
if (x != x || y != y)
x_cond = __m81_test (x);
if ((x_cond | y_cond) & __M81_COND_NAN)
return x + y;
if (m81(__isinf) (y))
if (y_cond & __M81_COND_INF)
{
ax = s(fabs) (x);
if (ax == 1)
return 0.0/0.0;
return y - y;
if (ax > 1)
return y > 0 ? y : 0;
return y_cond & __M81_COND_NEG ? 0 : y;
else
return y < 0 ? -y : 0;
return y_cond & __M81_COND_NEG ? -y : 0;
}
if (s(fabs) (y) == 1)
return y > 0 ? x : 1 / x;
return y_cond & __M81_COND_NEG ? 1 / x : x;
if (y == 2)
return x * x;
if (y == 0.5 && x >= 0)
if (y == 0.5 && !(x_cond & __M81_COND_NEG))
return m81(__ieee754_sqrt) (x);
if (x == 10.0)
@ -73,17 +77,17 @@ s(__ieee754_pow) (float_type x, float_type y)
}
ax = s(fabs) (x);
if (m81(__isinf) (x) || x == 0 || ax == 1)
if (x_cond & (__M81_COND_INF | __M81_COND_ZERO) || ax == 1)
{
z = ax;
if (y < 0)
if (y_cond & __M81_COND_NEG)
z = 1 / z;
if (m81(__signbit) (x))
if (x_cond & __M81_COND_NEG)
{
if (y != m81(__rint) (y))
{
if (x == -1)
z = 0.0/0.0;
z = (z - z) / (z - z);
}
else
goto maybe_negate;
@ -91,7 +95,7 @@ s(__ieee754_pow) (float_type x, float_type y)
return z;
}
if (x < 0.0)
if (x_cond & __M81_COND_NEG)
{
if (y == m81(__rint) (y))
{
@ -112,7 +116,7 @@ s(__ieee754_pow) (float_type x, float_type y)
}
}
else
z = 0.0/0.0;
z = (y - y) / (y - y);
}
else
z = m81(__ieee754_exp) (y * m81(__ieee754_log) (x));