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Unified Diff: fusl/src/math/expm1l.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/expm1l.c
diff --git a/fusl/src/math/expm1l.c b/fusl/src/math/expm1l.c
index d17150785282f9ce2e566de629b0061cd8848207..c7149a82e70f375c2efe995ee64dbd8b896fc942 100644
--- a/fusl/src/math/expm1l.c
+++ b/fusl/src/math/expm1l.c
@@ -50,74 +50,70 @@
#include "libm.h"
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-long double expm1l(long double x)
-{
- return expm1(x);
+long double expm1l(long double x) {
+ return expm1(x);
}
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
/* exp(x) - 1 = x + 0.5 x^2 + x^3 P(x)/Q(x)
-.5 ln 2 < x < .5 ln 2
Theoretical peak relative error = 3.4e-22 */
-static const long double
-P0 = -1.586135578666346600772998894928250240826E4L,
-P1 = 2.642771505685952966904660652518429479531E3L,
-P2 = -3.423199068835684263987132888286791620673E2L,
-P3 = 1.800826371455042224581246202420972737840E1L,
-P4 = -5.238523121205561042771939008061958820811E-1L,
-Q0 = -9.516813471998079611319047060563358064497E4L,
-Q1 = 3.964866271411091674556850458227710004570E4L,
-Q2 = -7.207678383830091850230366618190187434796E3L,
-Q3 = 7.206038318724600171970199625081491823079E2L,
-Q4 = -4.002027679107076077238836622982900945173E1L,
-/* Q5 = 1.000000000000000000000000000000000000000E0 */
-/* C1 + C2 = ln 2 */
-C1 = 6.93145751953125E-1L,
-C2 = 1.428606820309417232121458176568075500134E-6L,
-/* ln 2^-65 */
-minarg = -4.5054566736396445112120088E1L,
-/* ln 2^16384 */
-maxarg = 1.1356523406294143949492E4L;
+static const long double P0 = -1.586135578666346600772998894928250240826E4L,
+ P1 = 2.642771505685952966904660652518429479531E3L,
+ P2 = -3.423199068835684263987132888286791620673E2L,
+ P3 = 1.800826371455042224581246202420972737840E1L,
+ P4 = -5.238523121205561042771939008061958820811E-1L,
+ Q0 = -9.516813471998079611319047060563358064497E4L,
+ Q1 = 3.964866271411091674556850458227710004570E4L,
+ Q2 = -7.207678383830091850230366618190187434796E3L,
+ Q3 = 7.206038318724600171970199625081491823079E2L,
+ Q4 = -4.002027679107076077238836622982900945173E1L,
+ /* Q5 = 1.000000000000000000000000000000000000000E0 */
+ /* C1 + C2 = ln 2 */
+ C1 = 6.93145751953125E-1L,
+ C2 = 1.428606820309417232121458176568075500134E-6L,
+ /* ln 2^-65 */
+ minarg = -4.5054566736396445112120088E1L,
+ /* ln 2^16384 */
+ maxarg = 1.1356523406294143949492E4L;
-long double expm1l(long double x)
-{
- long double px, qx, xx;
- int k;
+long double expm1l(long double x) {
+ long double px, qx, xx;
+ int k;
- if (isnan(x))
- return x;
- if (x > maxarg)
- return x*0x1p16383L; /* overflow, unless x==inf */
- if (x == 0.0)
- return x;
- if (x < minarg)
- return -1.0;
+ if (isnan(x))
+ return x;
+ if (x > maxarg)
+ return x * 0x1p16383L; /* overflow, unless x==inf */
+ if (x == 0.0)
+ return x;
+ if (x < minarg)
+ return -1.0;
- xx = C1 + C2;
- /* Express x = ln 2 (k + remainder), remainder not exceeding 1/2. */
- px = floorl(0.5 + x / xx);
- k = px;
- /* remainder times ln 2 */
- x -= px * C1;
- x -= px * C2;
+ xx = C1 + C2;
+ /* Express x = ln 2 (k + remainder), remainder not exceeding 1/2. */
+ px = floorl(0.5 + x / xx);
+ k = px;
+ /* remainder times ln 2 */
+ x -= px * C1;
+ x -= px * C2;
- /* Approximate exp(remainder ln 2).*/
- px = (((( P4 * x + P3) * x + P2) * x + P1) * x + P0) * x;
- qx = (((( x + Q4) * x + Q3) * x + Q2) * x + Q1) * x + Q0;
- xx = x * x;
- qx = x + (0.5 * xx + xx * px / qx);
+ /* Approximate exp(remainder ln 2).*/
+ px = ((((P4 * x + P3) * x + P2) * x + P1) * x + P0) * x;
+ qx = ((((x + Q4) * x + Q3) * x + Q2) * x + Q1) * x + Q0;
+ xx = x * x;
+ qx = x + (0.5 * xx + xx * px / qx);
- /* exp(x) = exp(k ln 2) exp(remainder ln 2) = 2^k exp(remainder ln 2).
- We have qx = exp(remainder ln 2) - 1, so
- exp(x) - 1 = 2^k (qx + 1) - 1 = 2^k qx + 2^k - 1. */
- px = scalbnl(1.0, k);
- x = px * qx + (px - 1.0);
- return x;
+ /* exp(x) = exp(k ln 2) exp(remainder ln 2) = 2^k exp(remainder ln 2).
+ We have qx = exp(remainder ln 2) - 1, so
+ exp(x) - 1 = 2^k (qx + 1) - 1 = 2^k qx + 2^k - 1. */
+ px = scalbnl(1.0, k);
+ x = px * qx + (px - 1.0);
+ return x;
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
// TODO: broken implementation to make things compile
-long double expm1l(long double x)
-{
- return expm1(x);
+long double expm1l(long double x) {
+ return expm1(x);
}
#endif

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