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Unified Diff: fusl/src/math/asin.c

Issue 1714623002: [fusl] clang-format fusl (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: headers too Created 4 years, 10 months ago
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Index: fusl/src/math/asin.c
diff --git a/fusl/src/math/asin.c b/fusl/src/math/asin.c
index c926b188552b20b1842a26e4c5500b2f0686a95f..9b92be8480f4a583b5ffcc0f1731b705424d6d66 100644
--- a/fusl/src/math/asin.c
+++ b/fusl/src/math/asin.c
@@ -41,67 +41,66 @@
#include "libm.h"
-static const double
-pio2_hi = 1.57079632679489655800e+00, /* 0x3FF921FB, 0x54442D18 */
-pio2_lo = 6.12323399573676603587e-17, /* 0x3C91A626, 0x33145C07 */
-/* coefficients for R(x^2) */
-pS0 = 1.66666666666666657415e-01, /* 0x3FC55555, 0x55555555 */
-pS1 = -3.25565818622400915405e-01, /* 0xBFD4D612, 0x03EB6F7D */
-pS2 = 2.01212532134862925881e-01, /* 0x3FC9C155, 0x0E884455 */
-pS3 = -4.00555345006794114027e-02, /* 0xBFA48228, 0xB5688F3B */
-pS4 = 7.91534994289814532176e-04, /* 0x3F49EFE0, 0x7501B288 */
-pS5 = 3.47933107596021167570e-05, /* 0x3F023DE1, 0x0DFDF709 */
-qS1 = -2.40339491173441421878e+00, /* 0xC0033A27, 0x1C8A2D4B */
-qS2 = 2.02094576023350569471e+00, /* 0x40002AE5, 0x9C598AC8 */
-qS3 = -6.88283971605453293030e-01, /* 0xBFE6066C, 0x1B8D0159 */
-qS4 = 7.70381505559019352791e-02; /* 0x3FB3B8C5, 0xB12E9282 */
+static const double pio2_hi =
+ 1.57079632679489655800e+00, /* 0x3FF921FB, 0x54442D18 */
+ pio2_lo = 6.12323399573676603587e-17, /* 0x3C91A626, 0x33145C07 */
+ /* coefficients for R(x^2) */
+ pS0 = 1.66666666666666657415e-01, /* 0x3FC55555, 0x55555555 */
+ pS1 = -3.25565818622400915405e-01, /* 0xBFD4D612, 0x03EB6F7D */
+ pS2 = 2.01212532134862925881e-01, /* 0x3FC9C155, 0x0E884455 */
+ pS3 = -4.00555345006794114027e-02, /* 0xBFA48228, 0xB5688F3B */
+ pS4 = 7.91534994289814532176e-04, /* 0x3F49EFE0, 0x7501B288 */
+ pS5 = 3.47933107596021167570e-05, /* 0x3F023DE1, 0x0DFDF709 */
+ qS1 = -2.40339491173441421878e+00, /* 0xC0033A27, 0x1C8A2D4B */
+ qS2 = 2.02094576023350569471e+00, /* 0x40002AE5, 0x9C598AC8 */
+ qS3 = -6.88283971605453293030e-01, /* 0xBFE6066C, 0x1B8D0159 */
+ qS4 = 7.70381505559019352791e-02; /* 0x3FB3B8C5, 0xB12E9282 */
-static double R(double z)
-{
- double_t p, q;
- p = z*(pS0+z*(pS1+z*(pS2+z*(pS3+z*(pS4+z*pS5)))));
- q = 1.0+z*(qS1+z*(qS2+z*(qS3+z*qS4)));
- return p/q;
+static double R(double z) {
+ double_t p, q;
+ p = z * (pS0 + z * (pS1 + z * (pS2 + z * (pS3 + z * (pS4 + z * pS5)))));
+ q = 1.0 + z * (qS1 + z * (qS2 + z * (qS3 + z * qS4)));
+ return p / q;
}
-double asin(double x)
-{
- double z,r,s;
- uint32_t hx,ix;
+double asin(double x) {
+ double z, r, s;
+ uint32_t hx, ix;
- GET_HIGH_WORD(hx, x);
- ix = hx & 0x7fffffff;
- /* |x| >= 1 or nan */
- if (ix >= 0x3ff00000) {
- uint32_t lx;
- GET_LOW_WORD(lx, x);
- if ((ix-0x3ff00000 | lx) == 0)
- /* asin(1) = +-pi/2 with inexact */
- return x*pio2_hi + 0x1p-120f;
- return 0/(x-x);
- }
- /* |x| < 0.5 */
- if (ix < 0x3fe00000) {
- /* if 0x1p-1022 <= |x| < 0x1p-26, avoid raising underflow */
- if (ix < 0x3e500000 && ix >= 0x00100000)
- return x;
- return x + x*R(x*x);
- }
- /* 1 > |x| >= 0.5 */
- z = (1 - fabs(x))*0.5;
- s = sqrt(z);
- r = R(z);
- if (ix >= 0x3fef3333) { /* if |x| > 0.975 */
- x = pio2_hi-(2*(s+s*r)-pio2_lo);
- } else {
- double f,c;
- /* f+c = sqrt(z) */
- f = s;
- SET_LOW_WORD(f,0);
- c = (z-f*f)/(s+f);
- x = 0.5*pio2_hi - (2*s*r - (pio2_lo-2*c) - (0.5*pio2_hi-2*f));
- }
- if (hx >> 31)
- return -x;
- return x;
+ GET_HIGH_WORD(hx, x);
+ ix = hx & 0x7fffffff;
+ /* |x| >= 1 or nan */
+ if (ix >= 0x3ff00000) {
+ uint32_t lx;
+ GET_LOW_WORD(lx, x);
+ if ((ix - 0x3ff00000 | lx) == 0)
+ /* asin(1) = +-pi/2 with inexact */
+ return x * pio2_hi + 0x1p-120f;
+ return 0 / (x - x);
+ }
+ /* |x| < 0.5 */
+ if (ix < 0x3fe00000) {
+ /* if 0x1p-1022 <= |x| < 0x1p-26, avoid raising underflow */
+ if (ix < 0x3e500000 && ix >= 0x00100000)
+ return x;
+ return x + x * R(x * x);
+ }
+ /* 1 > |x| >= 0.5 */
+ z = (1 - fabs(x)) * 0.5;
+ s = sqrt(z);
+ r = R(z);
+ if (ix >= 0x3fef3333) { /* if |x| > 0.975 */
+ x = pio2_hi - (2 * (s + s * r) - pio2_lo);
+ } else {
+ double f, c;
+ /* f+c = sqrt(z) */
+ f = s;
+ SET_LOW_WORD(f, 0);
+ c = (z - f * f) / (s + f);
+ x = 0.5 * pio2_hi -
+ (2 * s * r - (pio2_lo - 2 * c) - (0.5 * pio2_hi - 2 * f));
+ }
+ if (hx >> 31)
+ return -x;
+ return x;
}

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