125c28e83SPiotr Jasiukajtis/* 225c28e83SPiotr Jasiukajtis * CDDL HEADER START 325c28e83SPiotr Jasiukajtis * 425c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 525c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 625c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 725c28e83SPiotr Jasiukajtis * 825c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 925c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 1025c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 1125c28e83SPiotr Jasiukajtis * and limitations under the License. 1225c28e83SPiotr Jasiukajtis * 1325c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 1425c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 1525c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 1625c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 1725c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 1825c28e83SPiotr Jasiukajtis * 1925c28e83SPiotr Jasiukajtis * CDDL HEADER END 2025c28e83SPiotr Jasiukajtis */ 2125c28e83SPiotr Jasiukajtis/* 2225c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2325c28e83SPiotr Jasiukajtis */ 2425c28e83SPiotr Jasiukajtis/* 2525c28e83SPiotr Jasiukajtis * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 2625c28e83SPiotr Jasiukajtis * Use is subject to license terms. 2725c28e83SPiotr Jasiukajtis */ 2825c28e83SPiotr Jasiukajtis 2925c28e83SPiotr Jasiukajtis .file "rndintl.s" 3025c28e83SPiotr Jasiukajtis 3125c28e83SPiotr Jasiukajtis#include "libm.h" 3225c28e83SPiotr Jasiukajtis 3325c28e83SPiotr Jasiukajtis ENTRY(aintl) 3425c28e83SPiotr Jasiukajtis movq %rsp,%rax 3525c28e83SPiotr Jasiukajtis subq $16,%rsp 3625c28e83SPiotr Jasiukajtis fstcw -8(%rax) 3725c28e83SPiotr Jasiukajtis fldt 8(%rax) 3825c28e83SPiotr Jasiukajtis movw -8(%rax),%cx 3925c28e83SPiotr Jasiukajtis orw $0x0c00,%cx 4025c28e83SPiotr Jasiukajtis movw %cx,-4(%rax) 4125c28e83SPiotr Jasiukajtis fldcw -4(%rax) / set RD = to_zero 4225c28e83SPiotr Jasiukajtis frndint 4325c28e83SPiotr Jasiukajtis fstcw -4(%rax) 4425c28e83SPiotr Jasiukajtis movw -4(%rax),%dx 4525c28e83SPiotr Jasiukajtis andw $0xf3ff,%dx 4625c28e83SPiotr Jasiukajtis movw -8(%rax),%cx 4725c28e83SPiotr Jasiukajtis andw $0x0c00,%cx 4825c28e83SPiotr Jasiukajtis orw %dx,%cx 4925c28e83SPiotr Jasiukajtis movw %cx,-8(%rax) 5025c28e83SPiotr Jasiukajtis fldcw -8(%rax) / restore RD 5125c28e83SPiotr Jasiukajtis addq $16,%rsp 5225c28e83SPiotr Jasiukajtis ret 5325c28e83SPiotr Jasiukajtis .align 16 5425c28e83SPiotr Jasiukajtis SET_SIZE(aintl) 5525c28e83SPiotr Jasiukajtis 5625c28e83SPiotr Jasiukajtis ENTRY(irintl) 5725c28e83SPiotr Jasiukajtis movq %rsp,%rcx 5825c28e83SPiotr Jasiukajtis subq $16,%rsp 5925c28e83SPiotr Jasiukajtis fldt 8(%rcx) / load x 6025c28e83SPiotr Jasiukajtis fistpl -8(%rcx) / [x] 6125c28e83SPiotr Jasiukajtis fwait 6225c28e83SPiotr Jasiukajtis movslq -8(%rcx),%rax 6325c28e83SPiotr Jasiukajtis addq $16,%rsp 6425c28e83SPiotr Jasiukajtis ret 6525c28e83SPiotr Jasiukajtis .align 16 6625c28e83SPiotr Jasiukajtis SET_SIZE(irintl) 6725c28e83SPiotr Jasiukajtis 6825c28e83SPiotr Jasiukajtis .data 6925c28e83SPiotr Jasiukajtis .align 16 7025c28e83SPiotr Jasiukajtishalf: .float 0.5 7125c28e83SPiotr Jasiukajtis 7225c28e83SPiotr Jasiukajtis ENTRY(anintl) 7325c28e83SPiotr Jasiukajtis.Lanintl: 7425c28e83SPiotr Jasiukajtis movq %rsp,%rcx 7525c28e83SPiotr Jasiukajtis subq $16,%rsp 7625c28e83SPiotr Jasiukajtis fstcw -8(%rcx) 7725c28e83SPiotr Jasiukajtis fldt 8(%rcx) 7825c28e83SPiotr Jasiukajtis movw -8(%rcx),%dx 7925c28e83SPiotr Jasiukajtis andw $0xf3ff,%dx 8025c28e83SPiotr Jasiukajtis movw %dx,-4(%rcx) 8125c28e83SPiotr Jasiukajtis fldcw -4(%rcx) / set RD = to_nearest 8225c28e83SPiotr Jasiukajtis fld %st(0) 8325c28e83SPiotr Jasiukajtis frndint / [x],x 8425c28e83SPiotr Jasiukajtis fstcw -4(%rcx) 8525c28e83SPiotr Jasiukajtis movw -4(%rcx),%dx 8625c28e83SPiotr Jasiukajtis andw $0xf3ff,%dx 8725c28e83SPiotr Jasiukajtis movw -8(%rcx),%ax 8825c28e83SPiotr Jasiukajtis andw $0x0c00,%ax 8925c28e83SPiotr Jasiukajtis orw %dx,%ax 9025c28e83SPiotr Jasiukajtis movw %ax,-8(%rcx) 9125c28e83SPiotr Jasiukajtis fldcw -8(%rcx) / restore RD 9225c28e83SPiotr Jasiukajtis fucomi %st(1),%st / check if x is already an integer 9325c28e83SPiotr Jasiukajtis jp .L0 9425c28e83SPiotr Jasiukajtis je .L0 9525c28e83SPiotr Jasiukajtis fxch / x,[x] 9625c28e83SPiotr Jasiukajtis fsub %st(1),%st / x-[x],[x] 9725c28e83SPiotr Jasiukajtis fabs / |x-[x]|,[x] 9825c28e83SPiotr Jasiukajtis PIC_SETUP(1) 9925c28e83SPiotr Jasiukajtis flds PIC_L(half) 10025c28e83SPiotr Jasiukajtis fcomip %st(1),%st / compare 0.5 with |x-[x]| 10125c28e83SPiotr Jasiukajtis PIC_WRAPUP 102*55fea89dSDan Cross je .halfway / if 0.5 = |x-[x]| goto halfway, 10325c28e83SPiotr Jasiukajtis / most cases will not take branch. 10425c28e83SPiotr Jasiukajtis.L0: 10525c28e83SPiotr Jasiukajtis addq $16,%rsp 10625c28e83SPiotr Jasiukajtis fstp %st(0) 10725c28e83SPiotr Jasiukajtis ret 10825c28e83SPiotr Jasiukajtis.halfway: 10925c28e83SPiotr Jasiukajtis / x = n+0.5, recompute anint(x) as x+sign(x)*0.5 11025c28e83SPiotr Jasiukajtis fldt 8(%rcx) / x, 0.5, [x] 11125c28e83SPiotr Jasiukajtis movw 16(%rcx),%ax / sign+exp part of x 11225c28e83SPiotr Jasiukajtis andw $0x8000,%ax / look at sign bit 11325c28e83SPiotr Jasiukajtis jnz .x_neg 11425c28e83SPiotr Jasiukajtis faddp 11525c28e83SPiotr Jasiukajtis addq $16,%rsp 11625c28e83SPiotr Jasiukajtis fstp %st(1) 11725c28e83SPiotr Jasiukajtis ret 11825c28e83SPiotr Jasiukajtis.x_neg: 11925c28e83SPiotr Jasiukajtis / here, x is negative, so return x-0.5 12025c28e83SPiotr Jasiukajtis fsubp %st,%st(1) / x-0.5,[x] 12125c28e83SPiotr Jasiukajtis addq $16,%rsp 12225c28e83SPiotr Jasiukajtis fstp %st(1) 12325c28e83SPiotr Jasiukajtis ret 12425c28e83SPiotr Jasiukajtis .align 16 12525c28e83SPiotr Jasiukajtis SET_SIZE(anintl) 12625c28e83SPiotr Jasiukajtis 12725c28e83SPiotr Jasiukajtis ENTRY(nintl) 12825c28e83SPiotr Jasiukajtis pushq %rbp 12925c28e83SPiotr Jasiukajtis movq %rsp,%rbp 13025c28e83SPiotr Jasiukajtis subq $16,%rsp 13125c28e83SPiotr Jasiukajtis pushq 24(%rbp) 13225c28e83SPiotr Jasiukajtis pushq 16(%rbp) 13325c28e83SPiotr Jasiukajtis call .Lanintl /// LOCAL 13425c28e83SPiotr Jasiukajtis fistpl -8(%rbp) 13525c28e83SPiotr Jasiukajtis fwait 13625c28e83SPiotr Jasiukajtis movslq -8(%rbp),%rax 13725c28e83SPiotr Jasiukajtis leave 13825c28e83SPiotr Jasiukajtis ret 13925c28e83SPiotr Jasiukajtis .align 16 14025c28e83SPiotr Jasiukajtis SET_SIZE(nintl) 141