| Index: fusl/src/math/sincosf.c
|
| diff --git a/fusl/src/math/sincosf.c b/fusl/src/math/sincosf.c
|
| index f8ca7232cfb371da2be6c3c87f079515fa4c01e1..11feeabf5705289b3fd6814de91e07ff784ce993 100644
|
| --- a/fusl/src/math/sincosf.c
|
| +++ b/fusl/src/math/sincosf.c
|
| @@ -18,100 +18,98 @@
|
| #include "libm.h"
|
|
|
| /* Small multiples of pi/2 rounded to double precision. */
|
| -static const double
|
| -s1pio2 = 1*M_PI_2, /* 0x3FF921FB, 0x54442D18 */
|
| -s2pio2 = 2*M_PI_2, /* 0x400921FB, 0x54442D18 */
|
| -s3pio2 = 3*M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
|
| -s4pio2 = 4*M_PI_2; /* 0x401921FB, 0x54442D18 */
|
| +static const double s1pio2 = 1 * M_PI_2, /* 0x3FF921FB, 0x54442D18 */
|
| + s2pio2 = 2 * M_PI_2, /* 0x400921FB, 0x54442D18 */
|
| + s3pio2 = 3 * M_PI_2, /* 0x4012D97C, 0x7F3321D2 */
|
| + s4pio2 = 4 * M_PI_2; /* 0x401921FB, 0x54442D18 */
|
|
|
| -void sincosf(float x, float *sin, float *cos)
|
| -{
|
| - double y;
|
| - float_t s, c;
|
| - uint32_t ix;
|
| - unsigned n, sign;
|
| +void sincosf(float x, float* sin, float* cos) {
|
| + double y;
|
| + float_t s, c;
|
| + uint32_t ix;
|
| + unsigned n, sign;
|
|
|
| - GET_FLOAT_WORD(ix, x);
|
| - sign = ix >> 31;
|
| - ix &= 0x7fffffff;
|
| + GET_FLOAT_WORD(ix, x);
|
| + sign = ix >> 31;
|
| + ix &= 0x7fffffff;
|
|
|
| - /* |x| ~<= pi/4 */
|
| - if (ix <= 0x3f490fda) {
|
| - /* |x| < 2**-12 */
|
| - if (ix < 0x39800000) {
|
| - /* raise inexact if x!=0 and underflow if subnormal */
|
| - FORCE_EVAL(ix < 0x00100000 ? x/0x1p120f : x+0x1p120f);
|
| - *sin = x;
|
| - *cos = 1.0f;
|
| - return;
|
| - }
|
| - *sin = __sindf(x);
|
| - *cos = __cosdf(x);
|
| - return;
|
| - }
|
| + /* |x| ~<= pi/4 */
|
| + if (ix <= 0x3f490fda) {
|
| + /* |x| < 2**-12 */
|
| + if (ix < 0x39800000) {
|
| + /* raise inexact if x!=0 and underflow if subnormal */
|
| + FORCE_EVAL(ix < 0x00100000 ? x / 0x1p120f : x + 0x1p120f);
|
| + *sin = x;
|
| + *cos = 1.0f;
|
| + return;
|
| + }
|
| + *sin = __sindf(x);
|
| + *cos = __cosdf(x);
|
| + return;
|
| + }
|
|
|
| - /* |x| ~<= 5*pi/4 */
|
| - if (ix <= 0x407b53d1) {
|
| - if (ix <= 0x4016cbe3) { /* |x| ~<= 3pi/4 */
|
| - if (sign) {
|
| - *sin = -__cosdf(x + s1pio2);
|
| - *cos = __sindf(x + s1pio2);
|
| - } else {
|
| - *sin = __cosdf(s1pio2 - x);
|
| - *cos = __sindf(s1pio2 - x);
|
| - }
|
| - return;
|
| - }
|
| - /* -sin(x+c) is not correct if x+c could be 0: -0 vs +0 */
|
| - *sin = -__sindf(sign ? x + s2pio2 : x - s2pio2);
|
| - *cos = -__cosdf(sign ? x + s2pio2 : x - s2pio2);
|
| - return;
|
| - }
|
| + /* |x| ~<= 5*pi/4 */
|
| + if (ix <= 0x407b53d1) {
|
| + if (ix <= 0x4016cbe3) { /* |x| ~<= 3pi/4 */
|
| + if (sign) {
|
| + *sin = -__cosdf(x + s1pio2);
|
| + *cos = __sindf(x + s1pio2);
|
| + } else {
|
| + *sin = __cosdf(s1pio2 - x);
|
| + *cos = __sindf(s1pio2 - x);
|
| + }
|
| + return;
|
| + }
|
| + /* -sin(x+c) is not correct if x+c could be 0: -0 vs +0 */
|
| + *sin = -__sindf(sign ? x + s2pio2 : x - s2pio2);
|
| + *cos = -__cosdf(sign ? x + s2pio2 : x - s2pio2);
|
| + return;
|
| + }
|
|
|
| - /* |x| ~<= 9*pi/4 */
|
| - if (ix <= 0x40e231d5) {
|
| - if (ix <= 0x40afeddf) { /* |x| ~<= 7*pi/4 */
|
| - if (sign) {
|
| - *sin = __cosdf(x + s3pio2);
|
| - *cos = -__sindf(x + s3pio2);
|
| - } else {
|
| - *sin = -__cosdf(x - s3pio2);
|
| - *cos = __sindf(x - s3pio2);
|
| - }
|
| - return;
|
| - }
|
| - *sin = __sindf(sign ? x + s4pio2 : x - s4pio2);
|
| - *cos = __cosdf(sign ? x + s4pio2 : x - s4pio2);
|
| - return;
|
| - }
|
| + /* |x| ~<= 9*pi/4 */
|
| + if (ix <= 0x40e231d5) {
|
| + if (ix <= 0x40afeddf) { /* |x| ~<= 7*pi/4 */
|
| + if (sign) {
|
| + *sin = __cosdf(x + s3pio2);
|
| + *cos = -__sindf(x + s3pio2);
|
| + } else {
|
| + *sin = -__cosdf(x - s3pio2);
|
| + *cos = __sindf(x - s3pio2);
|
| + }
|
| + return;
|
| + }
|
| + *sin = __sindf(sign ? x + s4pio2 : x - s4pio2);
|
| + *cos = __cosdf(sign ? x + s4pio2 : x - s4pio2);
|
| + return;
|
| + }
|
|
|
| - /* sin(Inf or NaN) is NaN */
|
| - if (ix >= 0x7f800000) {
|
| - *sin = *cos = x - x;
|
| - return;
|
| - }
|
| + /* sin(Inf or NaN) is NaN */
|
| + if (ix >= 0x7f800000) {
|
| + *sin = *cos = x - x;
|
| + return;
|
| + }
|
|
|
| - /* general argument reduction needed */
|
| - n = __rem_pio2f(x, &y);
|
| - s = __sindf(y);
|
| - c = __cosdf(y);
|
| - switch (n&3) {
|
| - case 0:
|
| - *sin = s;
|
| - *cos = c;
|
| - break;
|
| - case 1:
|
| - *sin = c;
|
| - *cos = -s;
|
| - break;
|
| - case 2:
|
| - *sin = -s;
|
| - *cos = -c;
|
| - break;
|
| - case 3:
|
| - default:
|
| - *sin = -c;
|
| - *cos = s;
|
| - break;
|
| - }
|
| + /* general argument reduction needed */
|
| + n = __rem_pio2f(x, &y);
|
| + s = __sindf(y);
|
| + c = __cosdf(y);
|
| + switch (n & 3) {
|
| + case 0:
|
| + *sin = s;
|
| + *cos = c;
|
| + break;
|
| + case 1:
|
| + *sin = c;
|
| + *cos = -s;
|
| + break;
|
| + case 2:
|
| + *sin = -s;
|
| + *cos = -c;
|
| + break;
|
| + case 3:
|
| + default:
|
| + *sin = -c;
|
| + *cos = s;
|
| + break;
|
| + }
|
| }
|
|
|