1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21/* 22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24/* 25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 .file "nextafter.S" 30 31#include "libm.h" 32LIBM_ANSI_PRAGMA_WEAK(nextafter,function) 33 .weak _nextafter 34 .type _nextafter,#function 35_nextafter = __nextafter 36#include "libm_synonyms.h" 37#include "libm_protos.h" 38 39 RO_DATA 40 .align 8 41.Lconstant: 42two54 = 0x00 43 .word 0x43500000,0x0 ! 2**54 44twom54 = 0x08 45 .word 0x3c900000,0x0 ! 2**-54 46tiny = 0x10 47 .word 0x00100000,0x0 ! tiny 48 49! variable using fp 50x = -0x8 51y = -0x10 52 53 ENTRY(nextafter) 54 save %sp,-128,%sp 55 PIC_SETUP(l7) 56 std %i0,[%fp+x] 57 or %g0,%i0,%o0 ! save original arguments 58 or %g0,%i1,%o1 59 std %i2,[%fp+y] 60 or %g0,%i2,%o2 61 or %g0,%i3,%o3 62 ldd [%fp+x],%f2 ! x 63 ldd [%fp+y],%f0 ! y 64 fcmpd %f2,%f0 ! x:y 65 PIC_SET(l7,.Lconstant,l0) 66 sethi %hi(0x80000000),%l1 67 andn %i0,%l1,%l4 68 fbe 9f ! next_return 69 nop 70 fbu,a 9f ! next_return 71 fmuld %f2,%f0,%f0 ! + -> * for Cheetah 72 orcc %i1,%l4,%g0 ! see if x is zero 73 bne 1f 74 tst %i0 75 ! x is zero, return sign(y)*min 76 and %i2,%l1,%i0 77 ba 4f ! next_final 78 mov 1,%i1 791: bge 2f 80 nop 81 ! x is negative 82 fbl 1f ! next_subulp 83 nop 84 fbg 3f ! next_addulp 85 nop 862: 87 fbl 3f ! next_addulp 88 nop 891: ! next_subulp 90 subcc %i1,1,%i1 91 ba 4f ! next_final 92 subx %i0,0,%i0 933: ! next_addulp 94 addcc %i1,1,%i1 95 addx %i0,0,%i0 964: ! next_final 97 sethi %hi(0x7ff00000),%l3 98 std %i0,[%fp+x] 99 andcc %i0,%l3,%i2 100 be,a 1f ! xflow 101 ldd [%l0+tiny],%f2 102 cmp %i2,%l3 103 bne,a 9f ! next_return 104 ldd [%fp+x],%f0 105 call NAME(_SVID_libm_err) ! overflow 106 or %g0,46,%o4 107 ba 9f 108 nop 1091: ! xflow 110 fmuld %f2,%f2,%f2 111 ldd [%fp+x],%f0 1129: ! next_return 113 ret 114 restore 115 116 SET_SIZE(nextafter) 117