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 |
20 | DEFINE_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 |
30 | END_COMPILERRT_FUNCTION(__fixdfsivfp) |
31 | |
32 | NO_EXEC_STACK_DIRECTIVE |
33 | |
34 | |