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_protos.h" 37 38 RO_DATA 39 .align 8 40.Lconstant: 41two54 = 0x00 42 .word 0x43500000,0x0 ! 2**54 43twom54 = 0x08 44 .word 0x3c900000,0x0 ! 2**-54 45tiny = 0x10 46 .word 0x00100000,0x0 ! tiny 47 48! variable using fp 49x = -0x8 50y = -0x10 51 52 ENTRY(nextafter) 53 save %sp,-128,%sp 54 PIC_SETUP(l7) 55 std %i0,[%fp+x] 56 or %g0,%i0,%o0 ! save original arguments 57 or %g0,%i1,%o1 58 std %i2,[%fp+y] 59 or %g0,%i2,%o2 60 or %g0,%i3,%o3 61 ldd [%fp+x],%f2 ! x 62 ldd [%fp+y],%f0 ! y 63 fcmpd %f2,%f0 ! x:y 64 PIC_SET(l7,.Lconstant,l0) 65 sethi %hi(0x80000000),%l1 66 andn %i0,%l1,%l4 67 fbe 9f ! next_return 68 nop 69 fbu,a 9f ! next_return 70 fmuld %f2,%f0,%f0 ! + -> * for Cheetah 71 orcc %i1,%l4,%g0 ! see if x is zero 72 bne 1f 73 tst %i0 74 ! x is zero, return sign(y)*min 75 and %i2,%l1,%i0 76 ba 4f ! next_final 77 mov 1,%i1 781: bge 2f 79 nop 80 ! x is negative 81 fbl 1f ! next_subulp 82 nop 83 fbg 3f ! next_addulp 84 nop 852: 86 fbl 3f ! next_addulp 87 nop 881: ! next_subulp 89 subcc %i1,1,%i1 90 ba 4f ! next_final 91 subx %i0,0,%i0 923: ! next_addulp 93 addcc %i1,1,%i1 94 addx %i0,0,%i0 954: ! next_final 96 sethi %hi(0x7ff00000),%l3 97 std %i0,[%fp+x] 98 andcc %i0,%l3,%i2 99 be,a 1f ! xflow 100 ldd [%l0+tiny],%f2 101 cmp %i2,%l3 102 bne,a 9f ! next_return 103 ldd [%fp+x],%f0 104 call NAME(_SVID_libm_err) ! overflow 105 or %g0,46,%o4 106 ba 9f 107 nop 1081: ! xflow 109 fmuld %f2,%f2,%f2 110 ldd [%fp+x],%f0 1119: ! next_return 112 ret 113 restore 114 115 SET_SIZE(nextafter) 116