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Unified Diff: fusl/src/math/log10l.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/log10l.c
diff --git a/fusl/src/math/log10l.c b/fusl/src/math/log10l.c
index 63dcc286d6211d455f291dc9fff2704792a2d236..30b40418d17e13e6ffb4ef92c707ff22dbde1722 100644
--- a/fusl/src/math/log10l.c
+++ b/fusl/src/math/log10l.c
@@ -60,9 +60,8 @@
#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-long double log10l(long double x)
-{
- return log10(x);
+long double log10l(long double x) {
+ return log10(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)
@@ -70,23 +69,17 @@ long double log10l(long double x)
* Theoretical peak relative error = 6.2e-22
*/
static const long double P[] = {
- 4.9962495940332550844739E-1L,
- 1.0767376367209449010438E1L,
- 7.7671073698359539859595E1L,
- 2.5620629828144409632571E2L,
- 4.2401812743503691187826E2L,
- 3.4258224542413922935104E2L,
- 1.0747524399916215149070E2L,
+ 4.9962495940332550844739E-1L, 1.0767376367209449010438E1L,
+ 7.7671073698359539859595E1L, 2.5620629828144409632571E2L,
+ 4.2401812743503691187826E2L, 3.4258224542413922935104E2L,
+ 1.0747524399916215149070E2L,
};
static const long double Q[] = {
-/* 1.0000000000000000000000E0,*/
- 2.3479774160285863271658E1L,
- 1.9444210022760132894510E2L,
- 7.7952888181207260646090E2L,
- 1.6911722418503949084863E3L,
- 2.0307734695595183428202E3L,
- 1.2695660352705325274404E3L,
- 3.2242573199748645407652E2L,
+ /* 1.0000000000000000000000E0,*/
+ 2.3479774160285863271658E1L, 1.9444210022760132894510E2L,
+ 7.7952888181207260646090E2L, 1.6911722418503949084863E3L,
+ 2.0307734695595183428202E3L, 1.2695660352705325274404E3L,
+ 3.2242573199748645407652E2L,
};
/* Coefficients for log(x) = z + z^3 P(z^2)/Q(z^2),
@@ -95,16 +88,13 @@ 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,
};
/* log10(2) */
#define L102A 0.3125L
@@ -115,77 +105,75 @@ static const long double S[4] = {
#define SQRTH 0.70710678118654752440L
-long double log10l(long double x)
-{
- long double y, z;
- int e;
+long double log10l(long double x) {
+ long double y, z;
+ int e;
- if (isnan(x))
- return x;
- if(x <= 0.0) {
- if(x == 0.0)
- return -1.0 / (x*x);
- return (x - x) / 0.0;
- }
- if (x == INFINITY)
- return INFINITY;
- /* separate mantissa from exponent */
- /* Note, frexp is used so that denormal numbers
- * will be handled properly.
- */
- x = frexpl(x, &e);
+ if (isnan(x))
+ return x;
+ if (x <= 0.0) {
+ if (x == 0.0)
+ return -1.0 / (x * x);
+ return (x - x) / 0.0;
+ }
+ if (x == INFINITY)
+ return INFINITY;
+ /* separate mantissa from exponent */
+ /* Note, frexp is used 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;
- y = x * (z * __polevll(z, R, 3) / __p1evll(z, S, 3));
- goto done;
- }
+ /* 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;
+ y = x * (z * __polevll(z, R, 3) / __p1evll(z, S, 3));
+ goto done;
+ }
- /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */
- if (x < SQRTH) {
- e -= 1;
- x = 2.0*x - 1.0;
- } else {
- x = x - 1.0;
- }
- z = x*x;
- y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 7));
- y = y - 0.5*z;
+ /* logarithm using log(1+x) = x - .5x**2 + x**3 P(x)/Q(x) */
+ if (x < SQRTH) {
+ e -= 1;
+ x = 2.0 * x - 1.0;
+ } else {
+ x = x - 1.0;
+ }
+ z = x * x;
+ y = x * (z * __polevll(x, P, 6) / __p1evll(x, Q, 7));
+ y = y - 0.5 * z;
done:
- /* Multiply log of fraction by log10(e)
- * and base 2 exponent by log10(2).
- *
- * ***CAUTION***
- *
- * This sequence of operations is critical and it may
- * be horribly defeated by some compiler optimizers.
- */
- z = y * (L10EB);
- z += x * (L10EB);
- z += e * (L102B);
- z += y * (L10EA);
- z += x * (L10EA);
- z += e * (L102A);
- return z;
+ /* Multiply log of fraction by log10(e)
+ * and base 2 exponent by log10(2).
+ *
+ * ***CAUTION***
+ *
+ * This sequence of operations is critical and it may
+ * be horribly defeated by some compiler optimizers.
+ */
+ z = y * (L10EB);
+ z += x * (L10EB);
+ z += e * (L102B);
+ z += y * (L10EA);
+ z += x * (L10EA);
+ z += e * (L102A);
+ return z;
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
// TODO: broken implementation to make things compile
-long double log10l(long double x)
-{
- return log10(x);
+long double log10l(long double x) {
+ return log10(x);
}
#endif

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