1*0a6a1f1dSLionel Sambuc//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// 2*0a6a1f1dSLionel Sambuc// 3*0a6a1f1dSLionel Sambuc// The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc// 5*0a6a1f1dSLionel Sambuc// This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc// Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc// 8*0a6a1f1dSLionel Sambuc//===----------------------------------------------------------------------===// 9*0a6a1f1dSLionel Sambuc 10*0a6a1f1dSLionel Sambuc#include "../assembly.h" 11*0a6a1f1dSLionel Sambuc 12*0a6a1f1dSLionel Sambuc// 13*0a6a1f1dSLionel Sambuc// extern float __truncdfsf2vfp(double a); 14*0a6a1f1dSLionel Sambuc// 15*0a6a1f1dSLionel Sambuc// Converts double precision float to signle precision result. 16*0a6a1f1dSLionel Sambuc// Uses Darwin calling convention where a double precision parameter is 17*0a6a1f1dSLionel Sambuc// passed in a R0/R1 pair and a signle precision result is returned in R0. 18*0a6a1f1dSLionel Sambuc// 19*0a6a1f1dSLionel Sambuc .syntax unified 20*0a6a1f1dSLionel Sambuc .p2align 2 21*0a6a1f1dSLionel SambucDEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) 22*0a6a1f1dSLionel Sambuc vmov d7, r0, r1 // load double from r0/r1 pair 23*0a6a1f1dSLionel Sambuc vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) 24*0a6a1f1dSLionel Sambuc vmov r0, s15 // return result in r0 25*0a6a1f1dSLionel Sambuc bx lr 26*0a6a1f1dSLionel SambucEND_COMPILERRT_FUNCTION(__truncdfsf2vfp) 27