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authornsz <nsz@port70.net>2012-03-19 19:26:31 +0100
committernsz <nsz@port70.net>2012-03-19 19:26:31 +0100
commit2e8c8fbe7d65ba0026cb084dc8570d94cbc908ff (patch)
tree59b2813cfc9f1e2d36d80d6c8b39c404fc9cdbe7 /src/math/__rem_pio2l.h
parentc3587effe27a3ac8c1406f064b7705963be9887a (diff)
downloadmusl-2e8c8fbe7d65ba0026cb084dc8570d94cbc908ff.tar.gz
don't inline __rem_pio2l so the code size is smaller
Diffstat (limited to 'src/math/__rem_pio2l.h')
-rw-r--r--src/math/__rem_pio2l.h131
1 files changed, 0 insertions, 131 deletions
diff --git a/src/math/__rem_pio2l.h b/src/math/__rem_pio2l.h
deleted file mode 100644
index 11123c3f..00000000
--- a/src/math/__rem_pio2l.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/* origin: FreeBSD /usr/src/lib/msun/ld80/e_rem_pio2.c */
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- * Copyright (c) 2008 Steven G. Kargl, David Schultz, Bruce D. Evans.
- *
- * Developed at SunSoft, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- *
- * Optimized by Bruce D. Evans.
- */
-#include "libm.h"
-#if LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
-/* ld80 version of __rem_pio2(x,y)
- *
- * return the remainder of x rem pi/2 in y[0]+y[1]
- * use __rem_pio2_large() for large x
- */
-
-#define BIAS (LDBL_MAX_EXP - 1)
-
-/*
- * invpio2: 64 bits of 2/pi
- * pio2_1: first 39 bits of pi/2
- * pio2_1t: pi/2 - pio2_1
- * pio2_2: second 39 bits of pi/2
- * pio2_2t: pi/2 - (pio2_1+pio2_2)
- * pio2_3: third 39 bits of pi/2
- * pio2_3t: pi/2 - (pio2_1+pio2_2+pio2_3)
- */
-static const double
-zero = 0.00000000000000000000e+00, /* 0x00000000, 0x00000000 */
-two24 = 1.67772160000000000000e+07, /* 0x41700000, 0x00000000 */
-pio2_1 = 1.57079632679597125389e+00, /* 0x3FF921FB, 0x54444000 */
-pio2_2 = -1.07463465549783099519e-12, /* -0x12e7b967674000.0p-92 */
-pio2_3 = 6.36831716351370313614e-25; /* 0x18a2e037074000.0p-133 */
-
-static const long double
-invpio2 = 6.36619772367581343076e-01L, /* 0xa2f9836e4e44152a.0p-64 */
-pio2_1t = -1.07463465549719416346e-12L, /* -0x973dcb3b399d747f.0p-103 */
-pio2_2t = 6.36831716351095013979e-25L, /* 0xc51701b839a25205.0p-144 */
-pio2_3t = -2.75299651904407171810e-37L; /* -0xbb5bf6c7ddd660ce.0p-185 */
-
-static inline int __rem_pio2l(long double x, long double *y)
-{
- union IEEEl2bits u,u1;
- long double z,w,t,r,fn;
- double tx[3],ty[2];
- int e0,ex,i,j,nx,n;
- int16_t expsign;
-
- u.e = x;
- expsign = u.xbits.expsign;
- ex = expsign & 0x7fff;
- if (ex < BIAS + 25 || (ex == BIAS + 25 && u.bits.manh < 0xc90fdaa2)) {
- union IEEEl2bits u2;
- int ex1;
-
- /* |x| ~< 2^25*(pi/2), medium size */
- /* Use a specialized rint() to get fn. Assume round-to-nearest. */
- fn = x*invpio2 + 0x1.8p63;
- fn = fn - 0x1.8p63;
-// FIXME
-//#ifdef HAVE_EFFICIENT_IRINT
-// n = irint(fn);
-//#else
- n = fn;
-//#endif
- r = x-fn*pio2_1;
- w = fn*pio2_1t; /* 1st round good to 102 bit */
- j = ex;
- y[0] = r-w;
- u2.e = y[0];
- ex1 = u2.xbits.expsign & 0x7fff;
- i = j-ex1;
- if (i > 22) { /* 2nd iteration needed, good to 141 */
- t = r;
- w = fn*pio2_2;
- r = t-w;
- w = fn*pio2_2t-((t-r)-w);
- y[0] = r-w;
- u2.e = y[0];
- ex1 = u2.xbits.expsign & 0x7fff;
- i = j-ex1;
- if (i > 61) { /* 3rd iteration need, 180 bits acc */
- t = r; /* will cover all possible cases */
- w = fn*pio2_3;
- r = t-w;
- w = fn*pio2_3t-((t-r)-w);
- y[0] = r-w;
- }
- }
- y[1] = (r - y[0]) - w;
- return n;
- }
- /*
- * all other (large) arguments
- */
- if (ex == 0x7fff) { /* x is inf or NaN */
- y[0] = y[1] = x - x;
- return 0;
- }
- /* set z = scalbn(|x|,ilogb(x)-23) */
- u1.e = x;
- e0 = ex - BIAS - 23; /* e0 = ilogb(|x|)-23; */
- u1.xbits.expsign = ex - e0;
- z = u1.e;
- for (i=0; i<2; i++) {
- tx[i] = (double)(int32_t)z;
- z = (z-tx[i])*two24;
- }
- tx[2] = z;
- nx = 3;
- while (tx[nx-1] == zero)
- nx--; /* skip zero term */
- n = __rem_pio2_large(tx,ty,e0,nx,2);
- r = (long double)ty[0] + ty[1];
- w = ty[1] - (r - ty[0]);
- if (expsign < 0) {
- y[0] = -r;
- y[1] = -w;
- return -n;
- }
- y[0] = r;
- y[1] = w;
- return n;
-}
-#endif