Print this page
11210 libm should be cstyle(1ONBLD) clean
*** 20,61 ****
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __fmodl = fmodl
#include "libm.h"
! static const int
! is = -0x7fffffff - 1,
! im = 0x0000ffff,
! iu = 0x00010000;
!
! static const long double
! zero = 0.0L,
! one = 1.0L;
#ifdef __LITTLE_ENDIAN
! #define __H0(x) *(3 + (int *) &x)
! #define __H1(x) *(2 + (int *) &x)
! #define __H2(x) *(1 + (int *) &x)
! #define __H3(x) *(0 + (int *) &x)
#else
! #define __H0(x) *(0 + (int *) &x)
! #define __H1(x) *(1 + (int *) &x)
! #define __H2(x) *(2 + (int *) &x)
! #define __H3(x) *(3 + (int *) &x)
#endif
long double
! fmodl(long double x, long double y) {
long double a, b;
int n, ix, iy, k, sx;
int hx;
int x0, y0, z0, carry;
unsigned x1, x2, x3, y1, y2, y3, z1, z2, z3;
--- 20,57 ----
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
+
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __fmodl = fmodl
#include "libm.h"
! static const int is = -0x7fffffff - 1, im = 0x0000ffff, iu = 0x00010000;
! static const long double zero = 0.0L, one = 1.0L;
#ifdef __LITTLE_ENDIAN
! #define __H0(x) *(3 + (int *)&x)
! #define __H1(x) *(2 + (int *)&x)
! #define __H2(x) *(1 + (int *)&x)
! #define __H3(x) *(0 + (int *)&x)
#else
! #define __H0(x) *(0 + (int *)&x)
! #define __H1(x) *(1 + (int *)&x)
! #define __H2(x) *(2 + (int *)&x)
! #define __H3(x) *(3 + (int *)&x)
#endif
long double
! fmodl(long double x, long double y)
! {
long double a, b;
int n, ix, iy, k, sx;
int hx;
int x0, y0, z0, carry;
unsigned x1, x2, x3, y1, y2, y3, z1, z2, z3;
*** 76,103 ****
--- 72,104 ----
/* purge off exception values */
if (x0 >= 0x7fff0000 || /* !finitel(x) */
(y0 > 0x7fff0000) || (y0 == 0x7fff0000 && ((y1 | y2 | y3) != 0)) ||
(y0 | y1 | y2 | y3) == 0) /* isnanl(y) || y = 0 */
return ((x * y) / (x * y));
+
a = fabsl(x);
b = fabsl(y);
+
if (a <= b) {
if (a < b)
return (x);
else
return (zero * x);
}
+
/* determine ix = ilogbl(x) */
if (x0 < iu) { /* subnormal x */
ix = -16382;
+
while (x0 == 0) {
ix -= 16;
x0 = x1 >> 16;
x1 = (x1 << 16) | (x2 >> 16);
x2 = (x2 << 16) | (x3 >> 16);
x3 = (x3 << 16);
}
+
while (x0 < iu) {
ix -= 1;
x0 = (x0 << 1) | (x1 >> 31);
x1 = (x1 << 1) | (x2 >> 31);
x2 = (x2 << 1) | (x3 >> 31);
*** 109,125 ****
--- 110,128 ----
}
/* determine iy = ilogbl(y) */
if (y0 < iu) { /* subnormal y */
iy = -16382;
+
while (y0 == 0) {
iy -= 16;
y0 = y1 >> 16;
y1 = (y1 << 16) | (y2 >> 16);
y2 = (y2 << 16) | (y3 >> 16);
y3 = (y3 << 16);
}
+
while (y0 < iu) {
iy -= 1;
y0 = (y0 << 1) | (y1 >> 31);
y1 = (y1 << 1) | (y2 >> 31);
y2 = (y2 << 1) | (y3 >> 31);
*** 130,172 ****
--- 133,182 ----
y0 = iu | (y0 & im);
}
/* fix point fmod */
n = ix - iy;
+
while (n--) {
while (x0 == 0 && n >= 16) {
n -= 16;
x0 = x1 >> 16;
x1 = (x1 << 16) | (x2 >> 16);
x2 = (x2 << 16) | (x3 >> 16);
x3 = (x3 << 16);
}
+
while (x0 < iu && n >= 1) {
n -= 1;
x0 = (x0 << 1) | (x1 >> 31);
x1 = (x1 << 1) | (x2 >> 31);
x2 = (x2 << 1) | (x3 >> 31);
x3 = (x3 << 1);
}
+
carry = 0;
z3 = x3 - y3;
carry = (z3 > x3);
+
if (carry == 0) {
z2 = x2 - y2;
carry = (z2 > x2);
} else {
z2 = x2 - y2 - 1;
carry = (z2 >= x2);
}
+
if (carry == 0) {
z1 = x1 - y1;
carry = (z1 > x1);
} else {
z1 = x1 - y1 - 1;
carry = (z1 >= x1);
}
+
z0 = x0 - y0 - carry;
+
if (z0 < 0) { /* double x */
x0 = x0 + x0 + ((x1 & is) != 0);
x1 = x1 + x1 + ((x2 & is) != 0);
x2 = x2 + x2 + ((x3 & is) != 0);
x3 = x3 + x3;
*** 176,185 ****
--- 186,196 ----
__H0(a) = hx & is;
__H1(a) = __H2(a) = __H3(a) = 0;
return (a);
}
}
+
/* x = z << 1 */
z0 = z0 + z0 + ((z1 & is) != 0);
z1 = z1 + z1 + ((z2 & is) != 0);
z2 = z2 + z2 + ((z3 & is) != 0);
z3 = z3 + z3;
*** 191,227 ****
--- 202,244 ----
}
carry = 0;
z3 = x3 - y3;
carry = (z3 > x3);
+
if (carry == 0) {
z2 = x2 - y2;
carry = (z2 > x2);
} else {
z2 = x2 - y2 - 1;
carry = (z2 >= x2);
}
+
if (carry == 0) {
z1 = x1 - y1;
carry = (z1 > x1);
} else {
z1 = x1 - y1 - 1;
carry = (z1 >= x1);
}
+
z0 = x0 - y0 - carry;
+
if (z0 >= 0) {
x0 = z0;
x1 = z1;
x2 = z2;
x3 = z3;
}
+
/* convert back to floating value and restore the sign */
if ((x0 | x1 | x2 | x3) == 0) {
__H0(a) = hx & is;
__H1(a) = __H2(a) = __H3(a) = 0;
return (a);
}
+
while (x0 < iu) {
if (x0 == 0) {
iy -= 16;
x0 = x1 >> 16;
x1 = (x1 << 16) | (x2 >> 16);
*** 243,252 ****
--- 260,270 ----
__H2(a) = x2;
__H3(a) = x3;
} else { /* subnormal output */
n = -16382 - iy;
k = n & 31;
+
if (k != 0) {
if (k <= 16) {
x3 = (x2 << (32 - k)) | (x3 >> k);
x2 = (x1 << (32 - k)) | (x2 >> k);
x1 = (x0 << (32 - k)) | (x1 >> k);
*** 256,275 ****
--- 274,296 ----
x2 = (x1 << (32 - k)) | (x2 >> k);
x1 = (x0 << (32 - k)) | (x1 >> k);
x0 = 0;
}
}
+
while (n >= 32) {
n -= 32;
x3 = x2;
x2 = x1;
x1 = x0;
x0 = 0;
}
+
__H0(a) = x0 | sx;
__H1(a) = x1;
__H2(a) = x2;
__H3(a) = x3;
a *= one;
}
+
return (a);
}