fixunssfsivfp.S revision 314564 
1//===-- fixunssfsivfp.S - Implement fixunssfsivfp -------------------------===//
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 unsigned int __fixunssfsivfp(float a);
14//
15// Converts single precision float to a 32-bit unsigned int rounding towards
16// zero. All negative values become zero.
17// Uses Darwin calling convention where a single precision parameter is
18// passed in a GPR..
19//
20	.syntax unified
21	.p2align 2
22DEFINE_COMPILERRT_FUNCTION(__fixunssfsivfp)
23#if defined(COMPILER_RT_ARMHF_TARGET)
24	vcvt.u32.f32 s0, s0
25	vmov r0, s0
26#else
27	vmov	s15, r0        // load float register from R0
28	vcvt.u32.f32 s15, s15  // convert single to 32-bit unsigned into s15
29	vmov	r0, s15	       // move s15 to result register
30#endif
31	bx	lr
32END_COMPILERRT_FUNCTION(__fixunssfsivfp)
33
34NO_EXEC_STACK_DIRECTIVE
35
36