mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.2 KiB
75 lines
2.2 KiB
.file "isnan.s"
|
|
|
|
// Copyright (c) 2000, Intel Corporation
|
|
// All rights reserved.
|
|
//
|
|
// Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story,
|
|
// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation.
|
|
//
|
|
// WARRANTY DISCLAIMER
|
|
//
|
|
// 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://developer.intel.com/opensource.
|
|
//
|
|
// History
|
|
//==============================================================
|
|
// 2/02/00: Initial version
|
|
|
|
.align 32
|
|
.global _isnan#
|
|
|
|
.section .text
|
|
.proc _isnan#
|
|
.align 32
|
|
|
|
// API
|
|
//==============================================================
|
|
// int _isnan (double x)
|
|
|
|
// Overview of operation
|
|
//==============================================================
|
|
// returns 1 if x is a nan; 0 otherwise
|
|
// takes no exceptions
|
|
|
|
// Registers used
|
|
//==============================================================
|
|
|
|
// general registers used:
|
|
// r8 for return value
|
|
|
|
// floating-point registers used:
|
|
// f8
|
|
|
|
// predicate registers used
|
|
// p6, p7
|
|
|
|
// qnan snan inf norm unorm 0 -+
|
|
// 1 1 0 0 0 0 11
|
|
|
|
_isnan:
|
|
{ .mfi
|
|
nop.m 999
|
|
fclass.m.unc p6,p7 = f8,0xc3
|
|
nop.i 999 ;;
|
|
}
|
|
|
|
{ .mib
|
|
(p6) addl r8 = 0x1,r0
|
|
(p7) addl r8 = 0x0,r0
|
|
br.ret.sptk b0 ;;
|
|
}
|
|
|
|
.endp _isnan
|