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timerfd: add time64 syscall support, decouple 32-bit time_t
[musl]
/
src
/
math
/
cbrtl.c
diff --git
a/src/math/cbrtl.c
b/src/math/cbrtl.c
index
0af65ef
..
ceff913
100644
(file)
--- a/
src/math/cbrtl.c
+++ b/
src/math/cbrtl.c
@@
-23,58
+23,50
@@
long double cbrtl(long double x)
return cbrt(x);
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
return cbrt(x);
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
-
-#define BIAS (LDBL_MAX_EXP - 1)
static const unsigned B1 = 709958130; /* B1 = (127-127.0/3-0.03306235651)*2**23 */
long double cbrtl(long double x)
{
static const unsigned B1 = 709958130; /* B1 = (127-127.0/3-0.03306235651)*2**23 */
long double cbrtl(long double x)
{
- union IEEEl2bits u, v;
+ union ldshape u = {x}, v;
+ union {float f; uint32_t i;} uft;
long double r, s, t, w;
long double r, s, t, w;
- double dr, dt, dx;
- float ft, fx;
- uint32_t hx;
- uint16_t expsign;
- int k;
-
- u.e = x;
- expsign = u.xbits.expsign;
- k = expsign & 0x7fff;
+ double_t dr, dt, dx;
+ float_t ft;
+ int e = u.i.se & 0x7fff;
+ int sign = u.i.se & 0x8000;
/*
* If x = +-Inf, then cbrt(x) = +-Inf.
* If x = NaN, then cbrt(x) = NaN.
*/
/*
* If x = +-Inf, then cbrt(x) = +-Inf.
* If x = NaN, then cbrt(x) = NaN.
*/
- if (
k == BIAS + LDBL_MAX_EXP
)
+ if (
e == 0x7fff
)
return x + x;
return x + x;
-
- if (k == 0) {
+ if (e == 0) {
+ /* Adjust subnormal numbers. */
+ u.f *= 0x1p120;
+ e = u.i.se & 0x7fff;
/* If x = +-0, then cbrt(x) = +-0. */
/* If x = +-0, then cbrt(x) = +-0. */
- if (
(u.bits.manh | u.bits.manl)
== 0)
+ if (
e
== 0)
return x;
return x;
- /* Adjust subnormal numbers. */
- u.e *= 0x1.0p514;
- k = u.bits.exp;
- k -= BIAS + 514;
- } else
- k -= BIAS;
- u.xbits.expsign = BIAS;
- v.e = 1;
-
- x = u.e;
- switch (k % 3) {
+ e -= 120;
+ }
+ e -= 0x3fff;
+ u.i.se = 0x3fff;
+ x = u.f;
+ switch (e % 3) {
case 1:
case -2:
case 1:
case -2:
- x
= 2*x
;
-
k
--;
+ x
*= 2
;
+
e
--;
break;
case 2:
case -1:
break;
case 2:
case -1:
- x
= 4*x
;
-
k
-= 2;
+ x
*= 4
;
+
e
-= 2;
break;
}
break;
}
- v.xbits.expsign = (expsign & 0x8000) | (BIAS + k / 3);
+ v.f = 1.0;
+ v.i.se = sign | (0x3fff + e/3);
/*
* The following is the guts of s_cbrtf, with the handling of
/*
* The following is the guts of s_cbrtf, with the handling of
@@
-83,9
+75,9
@@
long double cbrtl(long double x)
*/
/* ~5-bit estimate: */
*/
/* ~5-bit estimate: */
-
fx
= x;
-
GET_FLOAT_WORD(hx, fx)
;
-
SET_FLOAT_WORD(ft, ((hx & 0x7fffffff) / 3 + B1))
;
+
uft.f
= x;
+
uft.i = (uft.i & 0x7fffffff)/3 + B1
;
+
ft = uft.f
;
/* ~16-bit estimate: */
dx = x;
/* ~16-bit estimate: */
dx = x;
@@
-126,7
+118,7
@@
long double cbrtl(long double x)
r = (r-t)/(w+r); /* r-t is exact; w+r ~= 3*t */
t = t+t*r; /* error <= 0.5 + 0.5/3 + epsilon */
r = (r-t)/(w+r); /* r-t is exact; w+r ~= 3*t */
t = t+t*r; /* error <= 0.5 + 0.5/3 + epsilon */
- t *= v.
e
;
+ t *= v.
f
;
return t;
}
#endif
return t;
}
#endif