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msvcrt: Import j0 implementation from musl. 

Signed-off-by: Piotr Caban <piotr@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Piotr Caban 2021-04-28 19:34:17 +02:00 committed by Alexandre Julliard
parent e9f0fc12dc
commit c739e22223
6 changed files with 235 additions and 23 deletions
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1
configure vendored
View File

@ -19630,7 +19630,6 @@ for ac_func in \
expm1f \
fma \
fmaf \
j0 \
j1 \
jn \
lgamma \

1
configure.ac
View File

@ -2674,7 +2674,6 @@ AC_CHECK_FUNCS(\
expm1f \
fma \
fmaf \
j0 \
j1 \
jn \
lgamma \

238
dlls/msvcrt/math.c
View File

@ -2434,13 +2434,245 @@ int CDECL _isnan(double num)
return (u.i & ~0ull >> 1) > 0x7ffull << 52;
}
static double pzero(double x)
{
static const double pR8[6] = { /* for x in [inf, 8]=1/[0,0.125] */
0.00000000000000000000e+00,
-7.03124999999900357484e-02,
-8.08167041275349795626e+00,
-2.57063105679704847262e+02,
-2.48521641009428822144e+03,
-5.25304380490729545272e+03,
}, pS8[5] = {
1.16534364619668181717e+02,
3.83374475364121826715e+03,
4.05978572648472545552e+04,
1.16752972564375915681e+05,
4.76277284146730962675e+04,
}, pR5[6] = { /* for x in [8,4.5454]=1/[0.125,0.22001] */
-1.14125464691894502584e-11,
-7.03124940873599280078e-02,
-4.15961064470587782438e+00,
-6.76747652265167261021e+01,
-3.31231299649172967747e+02,
-3.46433388365604912451e+02,
}, pS5[5] = {
6.07539382692300335975e+01,
1.05125230595704579173e+03,
5.97897094333855784498e+03,
9.62544514357774460223e+03,
2.40605815922939109441e+03,
}, pR3[6] = {/* for x in [4.547,2.8571]=1/[0.2199,0.35001] */
-2.54704601771951915620e-09,
-7.03119616381481654654e-02,
-2.40903221549529611423e+00,
-2.19659774734883086467e+01,
-5.80791704701737572236e+01,
-3.14479470594888503854e+01,
}, pS3[5] = {
3.58560338055209726349e+01,
3.61513983050303863820e+02,
1.19360783792111533330e+03,
1.12799679856907414432e+03,
1.73580930813335754692e+02,
}, pR2[6] = {/* for x in [2.8570,2]=1/[0.3499,0.5] */
-8.87534333032526411254e-08,
-7.03030995483624743247e-02,
-1.45073846780952986357e+00,
-7.63569613823527770791e+00,
-1.11931668860356747786e+01,
-3.23364579351335335033e+00,
}, pS2[5] = {
2.22202997532088808441e+01,
1.36206794218215208048e+02,
2.70470278658083486789e+02,
1.53875394208320329881e+02,
1.46576176948256193810e+01,
};
const double *p, *q;
double z, r, s;
uint32_t ix;
ix = *(ULONGLONG*)&x >> 32;
ix &= 0x7fffffff;
if (ix >= 0x40200000) {
p = pR8;
q = pS8;
} else if (ix >= 0x40122E8B) {
p = pR5;
q = pS5;
} else if (ix >= 0x4006DB6D) {
p = pR3;
q = pS3;
} else /*ix >= 0x40000000*/ {
p = pR2;
q = pS2;
}
z = 1.0 / (x * x);
r = p[0] + z * (p[1] + z * (p[2] + z * (p[3] + z * (p[4] + z * p[5]))));
s = 1.0 + z * (q[0] + z * (q[1] + z * (q[2] + z * (q[3] + z * q[4]))));
return 1.0 + r / s;
}
static double qzero(double x)
{
static const double qR8[6] = { /* for x in [inf, 8]=1/[0,0.125] */
0.00000000000000000000e+00,
7.32421874999935051953e-02,
1.17682064682252693899e+01,
5.57673380256401856059e+02,
8.85919720756468632317e+03,
3.70146267776887834771e+04,
}, qS8[6] = {
1.63776026895689824414e+02,
8.09834494656449805916e+03,
1.42538291419120476348e+05,
8.03309257119514397345e+05,
8.40501579819060512818e+05,
-3.43899293537866615225e+05,
}, qR5[6] = { /* for x in [8,4.5454]=1/[0.125,0.22001] */
1.84085963594515531381e-11,
7.32421766612684765896e-02,
5.83563508962056953777e+00,
1.35111577286449829671e+02,
1.02724376596164097464e+03,
1.98997785864605384631e+03,
}, qS5[6] = {
8.27766102236537761883e+01,
2.07781416421392987104e+03,
1.88472887785718085070e+04,
5.67511122894947329769e+04,
3.59767538425114471465e+04,
-5.35434275601944773371e+03,
}, qR3[6] = {/* for x in [4.547,2.8571]=1/[0.2199,0.35001] */
4.37741014089738620906e-09,
7.32411180042911447163e-02,
3.34423137516170720929e+00,
4.26218440745412650017e+01,
1.70808091340565596283e+02,
1.66733948696651168575e+02,
}, qS3[6] = {
4.87588729724587182091e+01,
7.09689221056606015736e+02,
3.70414822620111362994e+03,
6.46042516752568917582e+03,
2.51633368920368957333e+03,
-1.49247451836156386662e+02,
}, qR2[6] = {/* for x in [2.8570,2]=1/[0.3499,0.5] */
1.50444444886983272379e-07,
7.32234265963079278272e-02,
1.99819174093815998816e+00,
1.44956029347885735348e+01,
3.16662317504781540833e+01,
1.62527075710929267416e+01,
}, qS2[6] = {
3.03655848355219184498e+01,
2.69348118608049844624e+02,
8.44783757595320139444e+02,
8.82935845112488550512e+02,
2.12666388511798828631e+02,
-5.31095493882666946917e+00,
};
const double *p, *q;
double s, r, z;
unsigned int ix;
ix = *(ULONGLONG*)&x >> 32;
ix &= 0x7fffffff;
if (ix >= 0x40200000) {
p = qR8;
q = qS8;
} else if (ix >= 0x40122E8B) {
p = qR5;
q = qS5;
} else if (ix >= 0x4006DB6D) {
p = qR3;
q = qS3;
} else /*ix >= 0x40000000*/ {
p = qR2;
q = qS2;
}
z = 1.0 / (x * x);
r = p[0] + z * (p[1] + z * (p[2] + z * (p[3] + z * (p[4] + z * p[5]))));
s = 1.0 + z * (q[0] + z * (q[1] + z * (q[2] + z * (q[3] + z * (q[4] + z * q[5])))));
return (-0.125 + r / s) / x;
}
/* j0 and y0 approximation for |x|>=2 */
static double j0_y0_approx(unsigned int ix, double x, BOOL y0)
{
static const double invsqrtpi = 5.64189583547756279280e-01;
double s, c, ss, cc, z;
s = sin(x);
c = cos(x);
if (y0) c = -c;
cc = s + c;
/* avoid overflow in 2*x, big ulp error when x>=0x1p1023 */
if (ix < 0x7fe00000) {
ss = s - c;
z = -cos(2 * x);
if (s * c < 0) cc = z / ss;
else ss = z / cc;
if (ix < 0x48000000) {
if (y0) ss = -ss;
cc = pzero(x) * cc - qzero(x) * ss;
}
}
return invsqrtpi * cc / sqrt(x);
}
/*********************************************************************
* _j0 (MSVCRT.@)
*
* Copied from musl: src/math/j0.c
*/
double CDECL _j0(double num)
double CDECL _j0(double x)
{
/* FIXME: errno handling */
return unix_funcs->j0( num );
static const double R02 = 1.56249999999999947958e-02,
R03 = -1.89979294238854721751e-04,
R04 = 1.82954049532700665670e-06,
R05 = -4.61832688532103189199e-09,
S01 = 1.56191029464890010492e-02,
S02 = 1.16926784663337450260e-04,
S03 = 5.13546550207318111446e-07,
S04 = 1.16614003333790000205e-09;
double z, r, s;
unsigned int ix;
ix = *(ULONGLONG*)&x >> 32;
ix &= 0x7fffffff;
/* j0(+-inf)=0, j0(nan)=nan */
if (ix >= 0x7ff00000)
return math_error(_DOMAIN, "_j0", x, 0, 1 / (x * x));
x = fabs(x);
if (ix >= 0x40000000) { /* |x| >= 2 */
/* large ulp error near zeros: 2.4, 5.52, 8.6537,.. */
return j0_y0_approx(ix, x, FALSE);
}
if (ix >= 0x3f200000) { /* |x| >= 2**-13 */
/* up to 4ulp error close to 2 */
z = x * x;
r = z * (R02 + z * (R03 + z * (R04 + z * R05)));
s = 1 + z * (S01 + z * (S02 + z * (S03 + z * S04)));
return (1 + x / 2) * (1 - x / 2) + z * (r / s);
}
/* 1 - x*x/4 */
/* prevent underflow */
/* inexact should be raised when x!=0, this is not done correctly */
if (ix >= 0x38000000) /* |x| >= 2**-127 */
x = 0.25 * x * x;
return 1 - x;
}
/*********************************************************************

14
dlls/msvcrt/unixlib.c
View File

@ -401,19 +401,6 @@ static float CDECL unix_hypotf(float x, float y)
return hypotf( x, y );
}
/*********************************************************************
* j0
*/
static double CDECL unix_j0(double num)
{
#ifdef HAVE_J0
return j0(num);
#else
FIXME("not implemented\n");
return 0;
#endif
}
/*********************************************************************
* j1
*/
@ -1053,7 +1040,6 @@ static const struct unix_funcs funcs =
unix_frexpf,
unix_hypot,
unix_hypotf,
unix_j0,
unix_j1,
unix_jn,
unix_ldexp,

1
dlls/msvcrt/unixlib.h
View File

@ -57,7 +57,6 @@ struct unix_funcs
float (CDECL *frexpf)(float x, int *exp);
double (CDECL *hypot)(double x, double y);
float (CDECL *hypotf)(float x, float y);
double (CDECL *j0)(double num);
double (CDECL *j1)(double num);
double (CDECL *jn)(int n, double num);
double (CDECL *ldexp)(double x, int exp);

3
include/config.h.in
View File

@ -288,9 +288,6 @@
/* Define to 1 if you have the `isnan' function. */
#undef HAVE_ISNAN
/* Define to 1 if you have the `j0' function. */
#undef HAVE_J0
/* Define to 1 if you have the `j1' function. */
#undef HAVE_J1