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5261 libm should stop using synonyms.h
5298 fabs is 0-sized, confuses dis(1) and others
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Approved by: Gordon Ross <gwr@nexenta.com>


  41  *         [-pi/2 , +pi/2], and let n = k mod 4.
  42  *      2. Let S=S(y1+y2), C=C(y1+y2). Depending on n, we have
  43  *
  44  *          n        sin(x)      cos(x)        tan(x)
  45  *     ----------------------------------------------------------
  46  *          0          S           C             S/C
  47  *          1          C          -S            -C/S
  48  *          2         -S          -C             S/C
  49  *          3         -C           S            -C/S
  50  *     ----------------------------------------------------------
  51  *
  52  * Special cases:
  53  *      Let trig be any of sin, cos, or tan.
  54  *      trig(+-INF)  is NaN, with signals;
  55  *      trig(NaN)    is that NaN;
  56  *
  57  * Accuracy:
  58  *      computer TRIG(x) returns trig(x) nearly rounded.
  59  */
  60 
  61 #pragma weak sincosl = __sincosl
  62 
  63 #include "libm.h"
  64 #include "longdouble.h"
  65 
  66 void
  67 sincosl(long double x, long double *s, long double *c) {
  68         long double y[2], z = 0.0L;
  69         int n, ix;
  70 
  71         ix = *(int *) &x;   /* High word of x */
  72 
  73         /* |x| ~< pi/4 */
  74         ix &= 0x7fffffff;
  75         if (ix <= 0x3ffe9220)
  76                 *s = __k_sincosl(x, z, c);
  77         else if (ix >= 0x7fff0000)
  78                 *s = *c = x - x;        /* trig(Inf or NaN) is NaN */
  79         else {                  /* argument reduction needed */
  80                 n = __rem_pio2l(x, y);
  81                 switch (n & 3) {


  41  *         [-pi/2 , +pi/2], and let n = k mod 4.
  42  *      2. Let S=S(y1+y2), C=C(y1+y2). Depending on n, we have
  43  *
  44  *          n        sin(x)      cos(x)        tan(x)
  45  *     ----------------------------------------------------------
  46  *          0          S           C             S/C
  47  *          1          C          -S            -C/S
  48  *          2         -S          -C             S/C
  49  *          3         -C           S            -C/S
  50  *     ----------------------------------------------------------
  51  *
  52  * Special cases:
  53  *      Let trig be any of sin, cos, or tan.
  54  *      trig(+-INF)  is NaN, with signals;
  55  *      trig(NaN)    is that NaN;
  56  *
  57  * Accuracy:
  58  *      computer TRIG(x) returns trig(x) nearly rounded.
  59  */
  60 
  61 #pragma weak __sincosl = sincosl
  62 
  63 #include "libm.h"
  64 #include "longdouble.h"
  65 
  66 void
  67 sincosl(long double x, long double *s, long double *c) {
  68         long double y[2], z = 0.0L;
  69         int n, ix;
  70 
  71         ix = *(int *) &x;   /* High word of x */
  72 
  73         /* |x| ~< pi/4 */
  74         ix &= 0x7fffffff;
  75         if (ix <= 0x3ffe9220)
  76                 *s = __k_sincosl(x, z, c);
  77         else if (ix >= 0x7fff0000)
  78                 *s = *c = x - x;        /* trig(Inf or NaN) is NaN */
  79         else {                  /* argument reduction needed */
  80                 n = __rem_pio2l(x, y);
  81                 switch (n & 3) {