1//===-- unorddf2vfp.S - Implement unorddf2vfp ------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "../assembly.h"
11
12//
13// extern int __unorddf2vfp(double a, double b);
14//
15// Returns one iff a or b is NaN
16// Uses Darwin calling convention where double precision arguments are passsed
17// like in GPR pairs.
18//
19	.syntax unified
20	.p2align 2
21DEFINE_COMPILERRT_FUNCTION(__unorddf2vfp)
22	vmov 	d6, r0, r1	// load r0/r1 pair in double register
23	vmov 	d7, r2, r3	// load r2/r3 pair in double register
24	vcmp.f64 d6, d7
25	vmrs	apsr_nzcv, fpscr
26	movvs	r0, #1      // set result register to 1 if "overflow" (any NaNs)
27	movvc	r0, #0
28	bx	lr
29END_COMPILERRT_FUNCTION(__unorddf2vfp)
30