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