1*25c28e83SPiotr Jasiukajtis/* 2*25c28e83SPiotr Jasiukajtis * CDDL HEADER START 3*25c28e83SPiotr Jasiukajtis * 4*25c28e83SPiotr Jasiukajtis * The contents of this file are subject to the terms of the 5*25c28e83SPiotr Jasiukajtis * Common Development and Distribution License (the "License"). 6*25c28e83SPiotr Jasiukajtis * You may not use this file except in compliance with the License. 7*25c28e83SPiotr Jasiukajtis * 8*25c28e83SPiotr Jasiukajtis * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*25c28e83SPiotr Jasiukajtis * or http://www.opensolaris.org/os/licensing. 10*25c28e83SPiotr Jasiukajtis * See the License for the specific language governing permissions 11*25c28e83SPiotr Jasiukajtis * and limitations under the License. 12*25c28e83SPiotr Jasiukajtis * 13*25c28e83SPiotr Jasiukajtis * When distributing Covered Code, include this CDDL HEADER in each 14*25c28e83SPiotr Jasiukajtis * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*25c28e83SPiotr Jasiukajtis * If applicable, add the following below this CDDL HEADER, with the 16*25c28e83SPiotr Jasiukajtis * fields enclosed by brackets "[]" replaced with your own identifying 17*25c28e83SPiotr Jasiukajtis * information: Portions Copyright [yyyy] [name of copyright owner] 18*25c28e83SPiotr Jasiukajtis * 19*25c28e83SPiotr Jasiukajtis * CDDL HEADER END 20*25c28e83SPiotr Jasiukajtis */ 21*25c28e83SPiotr Jasiukajtis/* 22*25c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23*25c28e83SPiotr Jasiukajtis */ 24*25c28e83SPiotr Jasiukajtis/* 25*25c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26*25c28e83SPiotr Jasiukajtis * Use is subject to license terms. 27*25c28e83SPiotr Jasiukajtis */ 28*25c28e83SPiotr Jasiukajtis 29*25c28e83SPiotr Jasiukajtis .file "ieee_funcl.s" 30*25c28e83SPiotr Jasiukajtis 31*25c28e83SPiotr Jasiukajtis#include "libm.h" 32*25c28e83SPiotr Jasiukajtis 33*25c28e83SPiotr Jasiukajtis ENTRY(isinfl) 34*25c28e83SPiotr Jasiukajtis movl 12(%esp),%eax / ax <-- sign and bexp of x 35*25c28e83SPiotr Jasiukajtis notl %eax 36*25c28e83SPiotr Jasiukajtis andl $0x00007fff,%eax 37*25c28e83SPiotr Jasiukajtis jz .L6 38*25c28e83SPiotr Jasiukajtis movl $0,%eax 39*25c28e83SPiotr Jasiukajtis.not_inf: 40*25c28e83SPiotr Jasiukajtis ret 41*25c28e83SPiotr Jasiukajtis 42*25c28e83SPiotr Jasiukajtis.L6: / here, (eax) = 0.0 43*25c28e83SPiotr Jasiukajtis movl 8(%esp),%ecx 44*25c28e83SPiotr Jasiukajtis xorl $0x80000000,%ecx / handle unsupported implicitly 45*25c28e83SPiotr Jasiukajtis orl 4(%esp), %ecx 46*25c28e83SPiotr Jasiukajtis jnz .not_inf 47*25c28e83SPiotr Jasiukajtis movl $1,%eax 48*25c28e83SPiotr Jasiukajtis ret 49*25c28e83SPiotr Jasiukajtis .align 4 50*25c28e83SPiotr Jasiukajtis SET_SIZE(isinfl) 51*25c28e83SPiotr Jasiukajtis 52*25c28e83SPiotr Jasiukajtis ENTRY(isnormall) 53*25c28e83SPiotr Jasiukajtis / TRUE iff (x is finite, but 54*25c28e83SPiotr Jasiukajtis / neither subnormal nor zero) 55*25c28e83SPiotr Jasiukajtis / iff (msb(sgnfcnd(x) /= 0 56*25c28e83SPiotr Jasiukajtis / & 0 < bexp(x) < 0x7fff) 57*25c28e83SPiotr Jasiukajtis movl 8(%esp),%eax / eax <-- hi_32(sgnfcnd(x)) 58*25c28e83SPiotr Jasiukajtis andl $0x80000000,%eax / eax[31] <-- msb(sgnfcnd(x)), 59*25c28e83SPiotr Jasiukajtis / rest_of(eax) <-- 0 60*25c28e83SPiotr Jasiukajtis jz .L8 / jump iff msb(sgnfcnd(x)) = 0 61*25c28e83SPiotr Jasiukajtis movl 12(%esp),%eax / ax <-- sign and bexp of x 62*25c28e83SPiotr Jasiukajtis notl %eax / ax[0..14] <-- not(bexp(x)) 63*25c28e83SPiotr Jasiukajtis andl $0x00007fff,%eax / eax <-- zero_xtnd(not(bexp(x))) 64*25c28e83SPiotr Jasiukajtis jz .L8 / jump iff bexp(x) = 0x7fff or 0 65*25c28e83SPiotr Jasiukajtis xorl $0x00007fff,%eax / treat pseudo-denormal as subnormal 66*25c28e83SPiotr Jasiukajtis jz .L8 67*25c28e83SPiotr Jasiukajtis movl $1,%eax 68*25c28e83SPiotr Jasiukajtis.L8: 69*25c28e83SPiotr Jasiukajtis ret 70*25c28e83SPiotr Jasiukajtis .align 4 71*25c28e83SPiotr Jasiukajtis SET_SIZE(isnormall) 72*25c28e83SPiotr Jasiukajtis 73*25c28e83SPiotr Jasiukajtis ENTRY(issubnormall) 74*25c28e83SPiotr Jasiukajtis / TRUE iff (bexp(x) = 0 & 75*25c28e83SPiotr Jasiukajtis / msb(sgnfcnd(x)) = 0 & frac(x) /= 0) 76*25c28e83SPiotr Jasiukajtis movl 8(%esp),%eax / eax <-- hi_32(sgnfcnd(x)) 77*25c28e83SPiotr Jasiukajtis testl $0x80000000,%eax / eax[31] = msb(sgnfcnd(x)); 78*25c28e83SPiotr Jasiukajtis / set ZF if it's 0. 79*25c28e83SPiotr Jasiukajtis jz .may_be_subnorm / jump iff msb(sgnfcnd(x)) = 0 80*25c28e83SPiotr Jasiukajtis.not_subnorm: 81*25c28e83SPiotr Jasiukajtis movl $0,%eax 82*25c28e83SPiotr Jasiukajtis.quicker_out: 83*25c28e83SPiotr Jasiukajtis ret 84*25c28e83SPiotr Jasiukajtis.may_be_subnorm: 85*25c28e83SPiotr Jasiukajtis testl $0x00007fff,12(%esp) / set ZF iff bexp(x) = 0 86*25c28e83SPiotr Jasiukajtis jnz .not_subnorm / jump iff bexp(x) /= 0 87*25c28e83SPiotr Jasiukajtis orl 4(%esp),%eax / (eax) = 0 iff sgnfcnd(x) = 0 88*25c28e83SPiotr Jasiukajtis jz .quicker_out 89*25c28e83SPiotr Jasiukajtis movl $1,%eax 90*25c28e83SPiotr Jasiukajtis ret 91*25c28e83SPiotr Jasiukajtis .align 4 92*25c28e83SPiotr Jasiukajtis SET_SIZE(issubnormall) 93*25c28e83SPiotr Jasiukajtis 94*25c28e83SPiotr Jasiukajtis ENTRY(iszerol) 95*25c28e83SPiotr Jasiukajtis movl 12(%esp),%eax / ax <-- sign and bexp of x 96*25c28e83SPiotr Jasiukajtis andl $0x00007fff,%eax / eax <-- zero_xtnd(bexp(x)) 97*25c28e83SPiotr Jasiukajtis jz .may_be_zero / jump iff bexp(x) = 0 98*25c28e83SPiotr Jasiukajtis.not_zero: 99*25c28e83SPiotr Jasiukajtis movl $0,%eax 100*25c28e83SPiotr Jasiukajtis ret 101*25c28e83SPiotr Jasiukajtis.may_be_zero: / here, (eax) = 0 102*25c28e83SPiotr Jasiukajtis orl 8(%esp),%eax / is hi_32(sgnfcnd(x)) = 0? 103*25c28e83SPiotr Jasiukajtis jnz .not_zero / jump iff hi_32(sgnfcnd(x)) /= 0 104*25c28e83SPiotr Jasiukajtis orl 4(%esp),%eax / is lo_32(sgnfcnd(x)) = 0? 105*25c28e83SPiotr Jasiukajtis jnz .not_zero / jump iff lo_32(sgnfcnd(x)) /= 0 106*25c28e83SPiotr Jasiukajtis movl $1,%eax 107*25c28e83SPiotr Jasiukajtis ret 108*25c28e83SPiotr Jasiukajtis .align 4 109*25c28e83SPiotr Jasiukajtis SET_SIZE(iszerol) 110*25c28e83SPiotr Jasiukajtis 111*25c28e83SPiotr Jasiukajtis ENTRY(signbitl) 112*25c28e83SPiotr Jasiukajtis movl 10(%esp),%eax / eax[31] <-- sign_bit(x) 113*25c28e83SPiotr Jasiukajtis shrl $31,%eax / eax <-- zero_xtnd(sign_bit(x)) 114*25c28e83SPiotr Jasiukajtis ret 115*25c28e83SPiotr Jasiukajtis .align 4 116*25c28e83SPiotr Jasiukajtis SET_SIZE(signbitl) 117