1//===-- fixdfsivfp.S - Implement fixdfsivfp -----------------------===//
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 int __fixdfsivfp(double a);
13//
14// Converts double precision float to a 32-bit int rounding towards zero.
15// Uses Darwin calling convention where a double precision parameter is
16// passed in GPR register pair.
17//
18	.syntax unified
19	.p2align 2
20DEFINE_COMPILERRT_FUNCTION(__fixdfsivfp)
21#if defined(COMPILER_RT_ARMHF_TARGET)
22	vcvt.s32.f64 s0, d0
23	vmov r0, s0
24#else
25	vmov	d7, r0, r1    // load double register from R0/R1
26	vcvt.s32.f64 s15, d7  // convert double to 32-bit int into s15
27	vmov	r0, s15	      // move s15 to result register
28#endif
29	bx	lr
30END_COMPILERRT_FUNCTION(__fixdfsivfp)
31
32NO_EXEC_STACK_DIRECTIVE
33
34