floatsisfvfp.S revision 314564 
1//===-- floatsisfvfp.S - Implement floatsisfvfp ---------------------------===//
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 float __floatsisfvfp(int a);
14//
15// Converts single precision float to a 32-bit int rounding towards zero.
16// Uses Darwin calling convention where a single precision result is
17// return in a GPR..
18//
19	.syntax unified
20	.p2align 2
21DEFINE_COMPILERRT_FUNCTION(__floatsisfvfp)
22#if defined(COMPILER_RT_ARMHF_TARGET)
23	vmov s0, r0
24	vcvt.f32.s32 s0, s0
25#else
26	vmov	s15, r0	       // move int to float register s15
27	vcvt.f32.s32 s15, s15  // convert 32-bit int in s15 to float in s15
28	vmov	r0, s15        // move s15 to result register
29#endif
30	bx	lr
31END_COMPILERRT_FUNCTION(__floatsisfvfp)
32
33NO_EXEC_STACK_DIRECTIVE
34
35