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Formerly m68k/fpu/atan2.c.~6~

This commit is contained in:
Roland McGrath 1992-11-18 20:26:47 +00:00
parent e9695d04cc
commit 8735502044
1 changed files with 3 additions and 6 deletions
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9
sysdeps/m68k/fpu/atan2.c
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@ -21,17 +21,12 @@ Cambridge, MA 02139, USA. */
#ifdef __GNUC__ #ifdef __GNUC__
static CONST double
PIo4 = 7.8539816339744827900E-1 , /*Hex 2^ -1 * 1.921FB54442D18 */
PIo2 = 1.5707963267948965580E0 , /*Hex 2^ 0 * 1.921FB54442D18 */
PI = 3.1415926535897931160E0 ; /*Hex 2^ 1 * 1.921FB54442D18 */
double double
DEFUN(atan2, (y, x), double y AND double x) DEFUN(atan2, (y, x), double y AND double x)
{ {
static CONST double one = 1.0, zero = 0.0; static CONST double one = 1.0, zero = 0.0;
double signx, signy; double signx, signy;
double pi; double pi, PIo4, PIo2;
if (__isnan(x)) if (__isnan(x))
return x; return x;
@ -42,6 +37,8 @@ DEFUN(atan2, (y, x), double y AND double x)
signx = __copysign(one, x); signx = __copysign(one, x);
asm("fmovecr%.x %1, %0" : "=f" (pi) : "i" (0)); asm("fmovecr%.x %1, %0" : "=f" (pi) : "i" (0));
PIo2 = pi / 2;
PIo4 = pi / 4;
if (y == zero) if (y == zero)
return signx == one ? y : __copysign(pi, signy); return signx == one ? y : __copysign(pi, signy);