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msvcrt: Use the cbrt()/cbrtf() implementation from the bundled musl library.

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Alexandre Julliard 2023-04-03 15:33:29 +02:00
parent e5808e2036
commit 406c583c3b
1 changed files with 0 additions and 84 deletions
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84
dlls/msvcrt/math.c
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@ -7722,90 +7722,6 @@ void __cdecl __libm_sse2_sqrt_precise(void)
#if _MSVCR_VER>=120
/*********************************************************************
* cbrt (MSVCR120.@)
*
* Copied from musl: src/math/cbrt.c
*/
double CDECL cbrt(double x)
{
static const UINT32 B1 = 715094163, B2 = 696219795;
static const double P0 = 1.87595182427177009643,
P1 = -1.88497979543377169875,
P2 = 1.621429720105354466140,
P3 = -0.758397934778766047437,
P4 = 0.145996192886612446982;
union {double f; UINT64 i;} u = {x};
double r,s,t,w;
UINT32 hx = u.i >> 32 & 0x7fffffff;
if (hx >= 0x7ff00000) /* cbrt(NaN,INF) is itself */
return x + x;
if (hx < 0x00100000) { /* zero or subnormal? */
u.f = x * 0x1p54;
hx = u.i>>32 & 0x7fffffff;
if (hx == 0)
return x;
hx = hx / 3 + B2;
} else
hx = hx / 3 + B1;
u.i &= 1ULL << 63;
u.i |= (UINT64)hx << 32;
t = u.f;
r = (t * t) * (t / x);
t = t * ((P0 + r * (P1 + r * P2)) + ((r * r) * r) * (P3 + r * P4));
u.f = t;
u.i = (u.i + 0x80000000) & 0xffffffffc0000000ULL;
t = u.f;
s = t * t;
r = x / s;
w = t + t;
r = (r - t) / (w + r);
t = t + t * r;
return t;
}
/*********************************************************************
* cbrtf (MSVCR120.@)
*
* Copied from musl: src/math/cbrtf.c
*/
float CDECL cbrtf(float x)
{
static const unsigned B1 = 709958130, B2 = 642849266;
double r,T;
union {float f; UINT32 i;} u = {x};
UINT32 hx = u.i & 0x7fffffff;
if (hx >= 0x7f800000)
return x + x;
if (hx < 0x00800000) { /* zero or subnormal? */
if (hx == 0)
return x;
u.f = x * 0x1p24f;
hx = u.i & 0x7fffffff;
hx = hx / 3 + B2;
} else
hx = hx / 3 + B1;
u.i &= 0x80000000;
u.i |= hx;
T = u.f;
r = T * T * T;
T = T * (x + x + r) / (x + r + r);
r = T * T * T;
T = T * (x + x + r) / (x + r + r);
return T;
}
/*********************************************************************
* exp2 (MSVCR120.@)
*