| .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) |
