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Unified Diff: fusl/src/math/log1pl.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/log1pl.c
diff --git a/fusl/src/math/log1pl.c b/fusl/src/math/log1pl.c
index 141b5f0b0c295a38d7ab1e1793bdbe2ec35fa2ae..2e070cb163da077db5f3c6b48c4d2ea70ed628a9 100644
--- a/fusl/src/math/log1pl.c
+++ b/fusl/src/math/log1pl.c
@@ -51,9 +51,8 @@
#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-long double log1pl(long double x)
-{
- return log1p(x);
+long double log1pl(long double x) {
+ return log1p(x);
}
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
/* Coefficients for log(1+x) = x - x^2 / 2 + x^3 P(x)/Q(x)
@@ -61,22 +60,16 @@ long double log1pl(long double x)
* Theoretical peak relative error = 2.32e-20
*/
static const long double P[] = {
- 4.5270000862445199635215E-5L,
- 4.9854102823193375972212E-1L,
- 6.5787325942061044846969E0L,
- 2.9911919328553073277375E1L,
- 6.0949667980987787057556E1L,
- 5.7112963590585538103336E1L,
- 2.0039553499201281259648E1L,
+ 4.5270000862445199635215E-5L, 4.9854102823193375972212E-1L,
+ 6.5787325942061044846969E0L, 2.9911919328553073277375E1L,
+ 6.0949667980987787057556E1L, 5.7112963590585538103336E1L,
+ 2.0039553499201281259648E1L,
};
static const long double Q[] = {
-/* 1.0000000000000000000000E0,*/
- 1.5062909083469192043167E1L,
- 8.3047565967967209469434E1L,
- 2.2176239823732856465394E2L,
- 3.0909872225312059774938E2L,
- 2.1642788614495947685003E2L,
- 6.0118660497603843919306E1L,
+ /* 1.0000000000000000000000E0,*/
+ 1.5062909083469192043167E1L, 8.3047565967967209469434E1L,
+ 2.2176239823732856465394E2L, 3.0909872225312059774938E2L,
+ 2.1642788614495947685003E2L, 6.0118660497603843919306E1L,
};
/* Coefficients for log(x) = z + z^3 P(z^2)/Q(z^2),
@@ -85,93 +78,88 @@ static const long double Q[] = {
* Theoretical peak relative error = 6.16e-22
*/
static const long double R[4] = {
- 1.9757429581415468984296E-3L,
--7.1990767473014147232598E-1L,
- 1.0777257190312272158094E1L,
--3.5717684488096787370998E1L,
+ 1.9757429581415468984296E-3L, -7.1990767473014147232598E-1L,
+ 1.0777257190312272158094E1L, -3.5717684488096787370998E1L,
};
static const long double S[4] = {
-/* 1.00000000000000000000E0L,*/
--2.6201045551331104417768E1L,
- 1.9361891836232102174846E2L,
--4.2861221385716144629696E2L,
+ /* 1.00000000000000000000E0L,*/
+ -2.6201045551331104417768E1L, 1.9361891836232102174846E2L,
+ -4.2861221385716144629696E2L,
};
static const long double C1 = 6.9314575195312500000000E-1L;
static const long double C2 = 1.4286068203094172321215E-6L;
#define SQRTH 0.70710678118654752440L
-long double log1pl(long double xm1)
-{
- long double x, y, z;
- int e;
+long double log1pl(long double xm1) {
+ long double x, y, z;
+ int e;
- if (isnan(xm1))
- return xm1;
- if (xm1 == INFINITY)
- return xm1;
- if (xm1 == 0.0)
- return xm1;
+ if (isnan(xm1))
+ return xm1;
+ if (xm1 == INFINITY)
+ return xm1;
+ if (xm1 == 0.0)
+ return xm1;
- x = xm1 + 1.0;
+ x = xm1 + 1.0;
- /* Test for domain errors. */
- if (x <= 0.0) {
- if (x == 0.0)
- return -1/(x*x); /* -inf with divbyzero */
- return 0/0.0f; /* nan with invalid */
- }
+ /* Test for domain errors. */
+ if (x <= 0.0) {
+ if (x == 0.0)
+ return -1 / (x * x); /* -inf with divbyzero */
+ return 0 / 0.0f; /* nan with invalid */
+ }
- /* Separate mantissa from exponent.
- Use frexp so that denormal numbers will be handled properly. */
- x = frexpl(x, &e);
+ /* Separate mantissa from exponent.
+ Use frexp so that denormal numbers will be handled properly. */
+ x = frexpl(x, &e);
- /* logarithm using log(x) = z + z^3 P(z)/Q(z),
- where z = 2(x-1)/x+1) */
- if (e > 2 || e < -2) {
- if (x < SQRTH) { /* 2(2x-1)/(2x+1) */
- e -= 1;
- z = x - 0.5;
- y = 0.5 * z + 0.5;
- } else { /* 2 (x-1)/(x+1) */
- z = x - 0.5;
- z -= 0.5;
- y = 0.5 * x + 0.5;
- }
- x = z / y;
- z = x*x;
- z = x * (z * __polevll(z, R, 3) / __p1evll(z, S, 3));
- z = z + e * C2;
- z = z + x;
- z = z + e * C1;
- return z;
- }
+ /* logarithm using log(x) = z + z^3 P(z)/Q(z),
+ where z = 2(x-1)/x+1) */
+ if (e > 2 || e < -2) {
+ if (x < SQRTH) { /* 2(2x-1)/(2x+1) */
+ e -= 1;
+ z = x - 0.5;
+ y = 0.5 * z + 0.5;
+ } else { /* 2 (x-1)/(x+1) */
+ z = x - 0.5;
+ z -= 0.5;
+ y = 0.5 * x + 0.5;
+ }
+ x = z / y;
+ z = x * x;
+ z = x * (z * __polevll(z, R, 3) / __p1evll(z, S, 3));
+ z = z + e * C2;
+ z = z + x;
+ z = z + e * C1;
+ return z;
+ }
- /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */
- if (x < SQRTH) {
- e -= 1;
- if (e != 0)
- x = 2.0 * x - 1.0;
- else
- x = xm1;
- } else {
- if (e != 0)
- x = x - 1.0;
- else
- x = xm1;
- }
- z = x*x;
- y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 6));
- y = y + e * C2;
- z = y - 0.5 * z;
- z = z + x;
- z = z + e * C1;
- return z;
+ /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */
+ if (x < SQRTH) {
+ e -= 1;
+ if (e != 0)
+ x = 2.0 * x - 1.0;
+ else
+ x = xm1;
+ } else {
+ if (e != 0)
+ x = x - 1.0;
+ else
+ x = xm1;
+ }
+ z = x * x;
+ y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 6));
+ y = y + e * C2;
+ z = y - 0.5 * z;
+ z = z + x;
+ z = z + e * C1;
+ return z;
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
// TODO: broken implementation to make things compile
-long double log1pl(long double x)
-{
- return log1p(x);
+long double log1pl(long double x) {
+ return log1p(x);
}
#endif

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