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Fix missing negate. Use __m81_test instead of explicit comparisons.

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This commit is contained in:
Ulrich Drepper 1997-05-29 12:05:37 +00:00
parent 1bf0f668e6
commit 08eeb8c0d3
1 changed files with 35 additions and 31 deletions
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66
sysdeps/m68k/fpu/e_atan2.c
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@ -35,55 +35,42 @@ float_type
s(__ieee754_atan2) (float_type y, float_type x)
{
float_type pi, pi_2, z;
unsigned long y_cond, x_cond;
__asm ("fmovecr%.x %#0, %0" : "=f" (pi));
__asm ("fscale%.w %#-1, %0" : "=f" (pi_2) : "0" (pi));
if (x != x || y != y)
y_cond = __m81_test (y);
x_cond = __m81_test (x);
if ((x_cond | y_cond) & __M81_COND_NAN)
z = x + y;
else if (y == 0)
else if (y_cond & __M81_COND_ZERO)
{
if (m81(__signbit) (x))
z = m81(__signbit) (y) ? -pi : pi;
if (x_cond & __M81_COND_NEG)
z = y_cond & __M81_COND_NEG ? -pi : pi;
else
z = y;
}
else if (m81(__isinf) (x))
else if (x_cond & __M81_COND_INF)
{
if (m81(__isinf) (y))
if (y_cond & __M81_COND_INF)
{
float_type pi_4;
__asm ("fscale%.w %#-2, %0" : "=f" (pi_4) : "0" (pi));
z = x > 0 ? pi_4 : 3 * pi_4;
z = x_cond & __M81_COND_NEG ? 3 * pi_4 : pi_4;
}
else
z = x > 0 ? 0 : pi;
if (m81(__signbit) (y))
z = x_cond & __M81_COND_NEG ? pi : 0;
if (y_cond & __M81_COND_NEG)
z = -z;
}
else if (m81(__isinf) (y))
z = y > 0 ? pi_2 : -pi_2;
else if (x > 0)
else if (y_cond & __M81_COND_INF)
z = y_cond & __M81_COND_NEG ? -pi_2 : pi_2;
else if (x_cond & __M81_COND_NEG)
{
if (y > 0)
if (y_cond & __M81_COND_NEG)
{
if (x > y)
z = m81(__atan) (y / x);
else
z = pi_2 - m81(__atan) (x / y);
}
else
{
if (x > -y)
z = m81(__atan) (y / x);
else
z = -pi_2 - m81(__atan) (x / y);
}
}
else
{
if (y < 0)
{
if (-x > y)
if (-x > -y)
z = -pi + m81(__atan) (y / x);
else
z = -pi_2 - m81(__atan) (x / y);
@ -96,5 +83,22 @@ s(__ieee754_atan2) (float_type y, float_type x)
z = pi_2 - m81(__atan) (x / y);
}
}
else
{
if (y_cond & __M81_COND_NEG)
{
if (x > -y)
z = m81(__atan) (y / x);
else
z = -pi_2 - m81(__atan) (x / y);
}
else
{
if (x > y)
z = m81(__atan) (y / x);
else
z = pi_2 - m81(__atan) (x / y);
}
}
return z;
}