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Side by Side Diff: fusl/src/math/asinhf.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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1 #include "libm.h" 1 #include "libm.h"
2 2
3 /* asinh(x) = sign(x)*log(|x|+sqrt(x*x+1)) ~= x - x^3/6 + o(x^5) */ 3 /* asinh(x) = sign(x)*log(|x|+sqrt(x*x+1)) ~= x - x^3/6 + o(x^5) */
4 float asinhf(float x) 4 float asinhf(float x) {
5 { 5 union {
6 » union {float f; uint32_t i;} u = {.f = x}; 6 float f;
7 » uint32_t i = u.i & 0x7fffffff; 7 uint32_t i;
8 » unsigned s = u.i >> 31; 8 } u = {.f = x};
9 uint32_t i = u.i & 0x7fffffff;
10 unsigned s = u.i >> 31;
9 11
10 » /* |x| */ 12 /* |x| */
11 » u.i = i; 13 u.i = i;
12 » x = u.f; 14 x = u.f;
13 15
14 » if (i >= 0x3f800000 + (12<<23)) { 16 if (i >= 0x3f800000 + (12 << 23)) {
15 » » /* |x| >= 0x1p12 or inf or nan */ 17 /* |x| >= 0x1p12 or inf or nan */
16 » » x = logf(x) + 0.693147180559945309417232121458176568f; 18 x = logf(x) + 0.693147180559945309417232121458176568f;
17 » } else if (i >= 0x3f800000 + (1<<23)) { 19 } else if (i >= 0x3f800000 + (1 << 23)) {
18 » » /* |x| >= 2 */ 20 /* |x| >= 2 */
19 » » x = logf(2*x + 1/(sqrtf(x*x+1)+x)); 21 x = logf(2 * x + 1 / (sqrtf(x * x + 1) + x));
20 » } else if (i >= 0x3f800000 - (12<<23)) { 22 } else if (i >= 0x3f800000 - (12 << 23)) {
21 » » /* |x| >= 0x1p-12, up to 1.6ulp error in [0.125,0.5] */ 23 /* |x| >= 0x1p-12, up to 1.6ulp error in [0.125,0.5] */
22 » » x = log1pf(x + x*x/(sqrtf(x*x+1)+1)); 24 x = log1pf(x + x * x / (sqrtf(x * x + 1) + 1));
23 » } else { 25 } else {
24 » » /* |x| < 0x1p-12, raise inexact if x!=0 */ 26 /* |x| < 0x1p-12, raise inexact if x!=0 */
25 » » FORCE_EVAL(x + 0x1p120f); 27 FORCE_EVAL(x + 0x1p120f);
26 » } 28 }
27 » return s ? -x : x; 29 return s ? -x : x;
28 } 30 }
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