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Diffstat (limited to 'sysdeps/alpha/w_sqrt.S')
| -rw-r--r-- | sysdeps/alpha/w_sqrt.S | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/sysdeps/alpha/w_sqrt.S b/sysdeps/alpha/w_sqrt.S deleted file mode 100644 index 32b06887d5..0000000000 --- a/sysdeps/alpha/w_sqrt.S +++ /dev/null @@ -1,161 +0,0 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by David Mosberger <davidm@cs.arizona.edu>, 1996. - Based on public-domain C source by Linus Torvalds. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* This version is much faster than generic sqrt implementation, but - it doesn't handle exceptional values or the inexact flag. Don't use - this if _IEEE_FP or _IEEE_FP_INEXACT is in effect. */ - -#ifndef _IEEE_FP - -#define _ERRNO_H -#include <bits/errno.h> -#include <sysdep.h> - - .set noreorder - -#ifdef __ELF__ - .section .rodata -#else - .rdata -#endif - .align 5 # align to cache line - - /* Do all memory accesses relative to sqrtdata. */ -sqrtdata: - -#define DN 0x00 -#define UP 0x08 -#define HALF 0x10 -#define ALMOST_THREE_HALF 0x18 -#define T2 0x20 - - .quad 0x3fefffffffffffff /* DN = next(1.0) */ - .quad 0x3ff0000000000001 /* UP = prev(1.0) */ - .quad 0x3fe0000000000000 /* HALF = 0.5 */ - .quad 0x3ff7ffffffc00000 /* ALMOST_THREE_HALF = 1.5-2^-30 */ - -/* table T2: */ -.long 0x1500, 0x2ef8, 0x4d67, 0x6b02, 0x87be, 0xa395, 0xbe7a, 0xd866 -.long 0xf14a, 0x1091b, 0x11fcd, 0x13552, 0x14999, 0x15c98, 0x16e34, 0x17e5f -.long 0x18d03, 0x19a01, 0x1a545, 0x1ae8a, 0x1b5c4, 0x1bb01, 0x1bfde, 0x1c28d -.long 0x1c2de, 0x1c0db, 0x1ba73, 0x1b11c, 0x1a4b5, 0x1953d, 0x18266, 0x16be0 -.long 0x1683e, 0x179d8, 0x18a4d, 0x19992, 0x1a789, 0x1b445, 0x1bf61, 0x1c989 -.long 0x1d16d, 0x1d77b, 0x1dddf, 0x1e2ad, 0x1e5bf, 0x1e6e8, 0x1e654, 0x1e3cd -.long 0x1df2a, 0x1d635, 0x1cb16, 0x1be2c, 0x1ae4e, 0x19bde, 0x1868e, 0x16e2e -.long 0x1527f, 0x1334a, 0x11051, 0xe951, 0xbe01, 0x8e0d, 0x5924, 0x1edd - -/* - * Stack variables: - */ -#define K 16(sp) -#define Y 24(sp) -#define FSIZE 32 - - .text - -LEAF(__sqrt, FSIZE) - lda sp, -FSIZE(sp) - ldgp gp, .-__sqrt(pv) - stq ra, 0(sp) -#ifdef PROF - lda AT, _mcount - jsr AT, (AT), _mcount -#endif - .prologue 1 - - stt $f16, K - lda t3, sqrtdata # load base address into t3 - - fblt $f16, $negative - - /* Compute initial guess. */ - - .align 3 - - ldah t1, 0x5fe8 # e0 : - ldq t2, K # .. e1 : - ldt $f12, HALF(t3) # e0 : - ldt $f18, ALMOST_THREE_HALF(t3) # .. e1 : - srl t2, 33, t0 # e0 : - mult $f16, $f12, $f11 # .. fm : $f11 = x * 0.5 - subl t1, t0, t1 # e0 : - addt $f12, $f12, $f17 # .. fa : $f17 = 1.0 - srl t1, 12, t0 # e0 : - and t0, 0xfc, t0 # .. e1 : - addq t0, t3, t0 # e0 : - ldl t0, T2(t0) # .. e1 : - addt $f12, $f17, $f15 # fa : $f15 = 1.5 - subl t1, t0, t1 # .. e1 : - sll t1, 32, t1 # e0 : - ldt $f14, DN(t3) # .. e1 : - stq t1, Y # e0 : - ldt $f13, Y # e1 : - addq sp, FSIZE, sp # e0 : - - mult $f11, $f13, $f10 # fm : $f10 = (x * 0.5) * y - mult $f10, $f13, $f10 # fm : $f10 = ((x * 0.5) * y) * y - subt $f15, $f10, $f1 # fa : $f1 = (1.5 - 0.5*x*y*y) - mult $f13, $f1, $f13 # fm : yp = y*(1.5 - 0.5*x*y*y) - mult $f11, $f13, $f11 # fm : $f11 = x * 0.5 * yp - mult $f11, $f13, $f11 # fm : $f11 = (x * 0.5 * yp) * yp - subt $f18, $f11, $f1 # fa : $f1= (1.5-2^-30) - 0.5*x*yp*yp - mult $f13, $f1, $f13 # fm : ypp = $f13 = yp*$f1 - subt $f15, $f12, $f1 # fa : $f1 = (1.5 - 0.5) - ldt $f15, UP(t3) # .. e1 : - mult $f16, $f13, $f10 # fm : z = $f10 = x * ypp - mult $f10, $f13, $f11 # fm : $f11 = z*ypp - mult $f10, $f12, $f12 # fm : $f12 = z*0.5 - subt $f1, $f11, $f1 # .. fa : $f1 = 1 - z*ypp - mult $f12, $f1, $f12 # fm : $f12 = z*0.5*(1 - z*ypp) - addt $f10, $f12, $f0 # fa : zp=res=$f0= z + z*0.5*(1 - z*ypp) - - mult/c $f0, $f14, $f12 # fm : zmi = zp * DN - mult/c $f0, $f15, $f11 # fm : zpl = zp * UP - mult/c $f0, $f12, $f1 # fm : $f1 = zp * zmi - mult/c $f0, $f11, $f15 # fm : $f15 = zp * zpl - - subt $f1, $f16, $f13 # fa : y1 = zp*zmi - x - subt $f15, $f16, $f15 # fa : y2 = zp*zpl - x - - fcmovge $f13, $f12, $f0 # res = (y1 >= 0) ? zmi : res - fcmovlt $f15, $f11, $f0 # res = (y2 < 0) ? zpl : res - - ret - -$negative: - lda t1, -1 - stq t1, K - lda t1, EDOM - stl t1, errno -#ifdef _LIBC_REENTRANT - jsr ra, __errno_location - lda t1, -1 - ldq ra, 0(sp) - stl t1, 0(v0) -#endif - ldt $f0, K # res = (double) 0xffffffffffffffff - addq sp, FSIZE, sp - ret - - END(__sqrt) - -weak_alias(__sqrt, sqrt) - -#endif /* !_IEEE_FP */ |