.file "fmaxl.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

//==============================================================

// long double fmaxl  (long double x, long double y)

//

// Overview of operation

//==============================================================

// returns the algebraic maximum of 2 input values

//

// Special cases:

//    fmaxl(x, nan) returns x if x is numeric  // Must special case this one

//    fmaxl(nan, y) returns y if y is numeric

//    fmaxl(nan1, nan2) returns quietized nan2

//    fmaxl(+0,+0) returns +0

//    fmaxl(-0,+0) returns +0

//    fmaxl(-0,-0) returns -0

//    fmaxl(+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 .text

GLOBAL_LIBM_ENTRY(fmaxl)

{ .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(fmaxl)

libm_alias_ldouble_other (fmax, fmax)