1//===-- fixunsdfsivfp.S - Implement fixunsdfsivfp -------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "../assembly.h"
10
11//
12// extern unsigned int __fixunsdfsivfp(double a);
13//
14// Converts double precision float to a 32-bit unsigned int rounding towards
15// zero. All negative values become zero.
16// Uses Darwin calling convention where a double precision parameter is
17// passed in GPR register pair.
18//
19	.syntax unified
20	.p2align 2
21DEFINE_COMPILERRT_FUNCTION(__fixunsdfsivfp)
22#if defined(COMPILER_RT_ARMHF_TARGET)
23	vcvt.u32.f64 s0, d0
24	vmov r0, s0
25#else
26	vmov	d7, r0, r1    // load double register from R0/R1
27	vcvt.u32.f64 s15, d7  // convert double to 32-bit int into s15
28	vmov	r0, s15	      // move s15 to result register
29#endif
30	bx	lr
31END_COMPILERRT_FUNCTION(__fixunsdfsivfp)
32
33NO_EXEC_STACK_DIRECTIVE
34
35