.file "fmax.s"// Copyright (c) 2001 - 2003, Intel Corporation// All rights reserved.//// Contributed 2001 by the Intel Numerics Group, Intel Corporation//// Redistribution and use in source and binary forms, with or without// modification, are permitted provided that the following conditions are// met://// * Redistributions of source code must retain the above copyright// notice, this list of conditions and the following disclaimer.//// * Redistributions in binary form must reproduce the above copyright// notice, this list of conditions and the following disclaimer in the// documentation and/or other materials provided with the distribution.//// * The name of Intel Corporation may not be used to endorse or promote// products derived from this software without specific prior written// permission.// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // // Intel Corporation is the author of this code, and requests that all// problem reports or change requests be submitted to it directly at // http://www.intel.com/software/products/opensource/libraries/num.htm.//// History//==============================================================// 05/31/01 Initial version // 05/20/02 Cleaned up namespace and sf0 syntax// 02/10/03 Reordered header: .section, .global, .proc, .align//// API//==============================================================// double fmax  (double x, double y)//// Overview of operation//==============================================================// returns the algebraic maximum of 2 input values// // Special cases://    fmax(x, nan) returns x if x is numeric  // Must special case this one//    fmax(nan, y) returns y if y is numeric//    fmax(nan1, nan2) returns quietized nan2//    fmax(+0,+0) returns +0//    fmax(-0,+0) returns +0//    fmax(-0,-0) returns -0//    fmax(+0,-0) returns +0                  // Must special case this one//  // SNaN causes invalid to be set// floating-point registers used: 2// f8,  input x, output// f9,  input y.section .textGLOBAL_LIBM_ENTRY(fmax){ .mfi      nop.m 999      fcmp.unord.s0 p6,p7 = f8, f9 // Is x or y a nan? Raise invalid or denormal      nop.i 999};;{ .mfi      nop.m 999(p7)  fclass.m.unc  p8,p9 = f9, 0x06 // If no nan, is y=-0?      nop.i 999};;{ .mfi      nop.m 999(p6)  fclass.m.unc  p10,p0 = f8, 0xc3 // Is x nan?      nop.i 999};;{ .mfi      nop.m 999(p9)  fmax.s0  f8 = f8, f9    // Normal case, no nan and y not -0      nop.i 999};;{ .mfi      nop.m 999(p8)  fmax.s0  f8 = f9, f8    // No nan and y -0      nop.i 999};;{ .mfb      nop.m 999(p10) fmerge.s  f8 = f9, f9   // If x nan, return y, else do nothing (returns x)      br.ret.sptk    b0           };;GLOBAL_LIBM_END(fmax)