1156cd587Sjoerg//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// 2156cd587Sjoerg// 3156cd587Sjoerg// The LLVM Compiler Infrastructure 4156cd587Sjoerg// 5156cd587Sjoerg// This file is dual licensed under the MIT and the University of Illinois Open 6156cd587Sjoerg// Source Licenses. See LICENSE.TXT for details. 7156cd587Sjoerg// 8156cd587Sjoerg//===----------------------------------------------------------------------===// 9156cd587Sjoerg 10156cd587Sjoerg#include "../assembly.h" 11156cd587Sjoerg 12156cd587Sjoerg// 13156cd587Sjoerg// extern float __truncdfsf2vfp(double a); 14156cd587Sjoerg// 15156cd587Sjoerg// Converts double precision float to signle precision result. 16156cd587Sjoerg// Uses Darwin calling convention where a double precision parameter is 17156cd587Sjoerg// passed in a R0/R1 pair and a signle precision result is returned in R0. 18156cd587Sjoerg// 19156cd587Sjoerg .syntax unified 20*61f2f256Sjoerg .p2align 2 21156cd587SjoergDEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) 22156cd587Sjoerg vmov d7, r0, r1 // load double from r0/r1 pair 23156cd587Sjoerg vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) 24156cd587Sjoerg vmov r0, s15 // return result in r0 25156cd587Sjoerg bx lr 26156cd587SjoergEND_COMPILERRT_FUNCTION(__truncdfsf2vfp) 27