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 /* 23*25c28e83SPiotr Jasiukajtis * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24*25c28e83SPiotr Jasiukajtis */ 25*25c28e83SPiotr Jasiukajtis /* 26*25c28e83SPiotr Jasiukajtis * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27*25c28e83SPiotr Jasiukajtis * Use is subject to license terms. 28*25c28e83SPiotr Jasiukajtis */ 29*25c28e83SPiotr Jasiukajtis 30*25c28e83SPiotr Jasiukajtis #pragma weak fminf = __fminf 31*25c28e83SPiotr Jasiukajtis 32*25c28e83SPiotr Jasiukajtis #include "libm.h" /* for islessequal macro */ 33*25c28e83SPiotr Jasiukajtis 34*25c28e83SPiotr Jasiukajtis float 35*25c28e83SPiotr Jasiukajtis __fminf(float x, float y) { 36*25c28e83SPiotr Jasiukajtis /* 37*25c28e83SPiotr Jasiukajtis * On SPARC v8plus/v9, this could be implemented as follows 38*25c28e83SPiotr Jasiukajtis * (assuming %f0 = x, %f1 = y, return value left in %f0): 39*25c28e83SPiotr Jasiukajtis * 40*25c28e83SPiotr Jasiukajtis * fcmps %fcc0,%f1,%f1 41*25c28e83SPiotr Jasiukajtis * fmovsu %fcc0,%f0,%f1 42*25c28e83SPiotr Jasiukajtis * fcmps %fcc0,%f0,%f1 43*25c28e83SPiotr Jasiukajtis * fmovsug %fcc0,%f1,%f0 44*25c28e83SPiotr Jasiukajtis * st %f0,[x] 45*25c28e83SPiotr Jasiukajtis * st %f1,[y] 46*25c28e83SPiotr Jasiukajtis * ld [x],%l0 47*25c28e83SPiotr Jasiukajtis * ld [y],%l1 48*25c28e83SPiotr Jasiukajtis * or %l0,%l1,%l2 49*25c28e83SPiotr Jasiukajtis * sethi %hi(0x80000000),%l3 50*25c28e83SPiotr Jasiukajtis * and %l3,%l2,%l2 51*25c28e83SPiotr Jasiukajtis * or %l0,%l2,%l0 52*25c28e83SPiotr Jasiukajtis * st %l0,[x] 53*25c28e83SPiotr Jasiukajtis * ld [x],%f0 54*25c28e83SPiotr Jasiukajtis * 55*25c28e83SPiotr Jasiukajtis * If VIS instructions are available, use this code instead: 56*25c28e83SPiotr Jasiukajtis * 57*25c28e83SPiotr Jasiukajtis * fcmps %fcc0,%f1,%f1 58*25c28e83SPiotr Jasiukajtis * fmovsu %fcc0,%f0,%f1 59*25c28e83SPiotr Jasiukajtis * fcmps %fcc0,%f0,%f1 60*25c28e83SPiotr Jasiukajtis * fmovsug %fcc0,%f1,%f0 61*25c28e83SPiotr Jasiukajtis * fors %f0,%f1,%f2 62*25c28e83SPiotr Jasiukajtis * fzeros %f3 63*25c28e83SPiotr Jasiukajtis * fnegs %f3,%f3 64*25c28e83SPiotr Jasiukajtis * fands %f3,%f2,%f2 65*25c28e83SPiotr Jasiukajtis * fors %f0,%f2,%f0 66*25c28e83SPiotr Jasiukajtis * 67*25c28e83SPiotr Jasiukajtis * If VIS 3.0 instructions are available, use this: 68*25c28e83SPiotr Jasiukajtis * 69*25c28e83SPiotr Jasiukajtis * flcmps %fcc0,%f0,%f1 70*25c28e83SPiotr Jasiukajtis * fmovsge %fcc0,%f1,%f0 ! move if %fcc0 is 0 or 2 71*25c28e83SPiotr Jasiukajtis */ 72*25c28e83SPiotr Jasiukajtis 73*25c28e83SPiotr Jasiukajtis union { 74*25c28e83SPiotr Jasiukajtis unsigned i; 75*25c28e83SPiotr Jasiukajtis float f; 76*25c28e83SPiotr Jasiukajtis } xx, yy; 77*25c28e83SPiotr Jasiukajtis unsigned s; 78*25c28e83SPiotr Jasiukajtis 79*25c28e83SPiotr Jasiukajtis /* if y is nan, replace it by x */ 80*25c28e83SPiotr Jasiukajtis if (y != y) 81*25c28e83SPiotr Jasiukajtis y = x; 82*25c28e83SPiotr Jasiukajtis 83*25c28e83SPiotr Jasiukajtis /* if x is nan, replace it by y */ 84*25c28e83SPiotr Jasiukajtis if (x != x) 85*25c28e83SPiotr Jasiukajtis x = y; 86*25c28e83SPiotr Jasiukajtis 87*25c28e83SPiotr Jasiukajtis /* At this point, x and y are either both numeric, or both NaN */ 88*25c28e83SPiotr Jasiukajtis if (!isnan(x) && !islessequal(x, y)) 89*25c28e83SPiotr Jasiukajtis x = y; 90*25c28e83SPiotr Jasiukajtis 91*25c28e83SPiotr Jasiukajtis /* 92*25c28e83SPiotr Jasiukajtis * set the sign of the result if either x or y has its sign set 93*25c28e83SPiotr Jasiukajtis */ 94*25c28e83SPiotr Jasiukajtis xx.f = x; 95*25c28e83SPiotr Jasiukajtis yy.f = y; 96*25c28e83SPiotr Jasiukajtis s = (xx.i | yy.i) & 0x80000000; 97*25c28e83SPiotr Jasiukajtis xx.i |= s; 98*25c28e83SPiotr Jasiukajtis 99*25c28e83SPiotr Jasiukajtis return (xx.f); 100*25c28e83SPiotr Jasiukajtis } 101