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Side by Side Diff: fusl/src/math/exp10.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 #define _GNU_SOURCE 1 #define _GNU_SOURCE
2 #include <math.h> 2 #include <math.h>
3 #include <stdint.h> 3 #include <stdint.h>
4 #include "libc.h" 4 #include "libc.h"
5 5
6 double exp10(double x) 6 double exp10(double x) {
7 { 7 static const double p10[] = {
8 » static const double p10[] = { 8 1e-15, 1e-14, 1e-13, 1e-12, 1e-11, 1e-10, 1e-9, 1e-8, 1e-7, 1e-6, 1e-5,
9 » » 1e-15, 1e-14, 1e-13, 1e-12, 1e-11, 1e-10, 9 1e-4, 1e-3, 1e-2, 1e-1, 1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6,
10 » » 1e-9, 1e-8, 1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 1e-1, 10 1e7, 1e8, 1e9, 1e10, 1e11, 1e12, 1e13, 1e14, 1e15};
11 » » 1, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 11 double n, y = modf(x, &n);
12 » » 1e10, 1e11, 1e12, 1e13, 1e14, 1e15 12 union {
13 » }; 13 double f;
14 » double n, y = modf(x, &n); 14 uint64_t i;
15 » union {double f; uint64_t i;} u = {n}; 15 } u = {n};
16 » /* fabs(n) < 16 without raising invalid on nan */ 16 /* fabs(n) < 16 without raising invalid on nan */
17 » if ((u.i>>52 & 0x7ff) < 0x3ff+4) { 17 if ((u.i >> 52 & 0x7ff) < 0x3ff + 4) {
18 » » if (!y) return p10[(int)n+15]; 18 if (!y)
19 » » y = exp2(3.32192809488736234787031942948939 * y); 19 return p10[(int)n + 15];
20 » » return y * p10[(int)n+15]; 20 y = exp2(3.32192809488736234787031942948939 * y);
21 » } 21 return y * p10[(int)n + 15];
22 » return pow(10.0, x); 22 }
23 return pow(10.0, x);
23 } 24 }
24 25
25 weak_alias(exp10, pow10); 26 weak_alias(exp10, pow10);
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