1//===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===//
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 double __subdf3vfp(double a, double b);
14//
15// Returns difference between two double precision floating point numbers using
16// the Darwin calling convention where double arguments are passsed in GPR pairs
17//
18	.syntax unified
19	.p2align 2
20DEFINE_COMPILERRT_FUNCTION(__subdf3vfp)
21	vmov 	d6, r0, r1         // move first param from r0/r1 pair into d6
22	vmov 	d7, r2, r3         // move second param from r2/r3 pair into d7
23	vsub.f64 d6, d6, d7
24	vmov 	r0, r1, d6         // move result back to r0/r1 pair
25	bx	lr
26END_COMPILERRT_FUNCTION(__subdf3vfp)
27