1 //===-- fixdfsivfp.S - Implement fixdfsivfp -----------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #include "../assembly.h"
12 // extern int __fixdfsivfp(double a);
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.
20 DEFINE_COMPILERRT_FUNCTION(__fixdfsivfp)
21 #if defined(COMPILER_RT_ARMHF_TARGET)
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
30 END_COMPILERRT_FUNCTION(__fixdfsivfp)
32 NO_EXEC_STACK_DIRECTIVE