1*7c3d14c8STreehugger Robot//===-- truncdfsf2vfp.S - Implement truncdfsf2vfp -------------------------===// 2*7c3d14c8STreehugger Robot// 3*7c3d14c8STreehugger Robot// The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot// 5*7c3d14c8STreehugger Robot// This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot// Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot// 8*7c3d14c8STreehugger Robot//===----------------------------------------------------------------------===// 9*7c3d14c8STreehugger Robot 10*7c3d14c8STreehugger Robot#include "../assembly.h" 11*7c3d14c8STreehugger Robot 12*7c3d14c8STreehugger Robot// 13*7c3d14c8STreehugger Robot// extern float __truncdfsf2vfp(double a); 14*7c3d14c8STreehugger Robot// 15*7c3d14c8STreehugger Robot// Converts double precision float to signle precision result. 16*7c3d14c8STreehugger Robot// Uses Darwin calling convention where a double precision parameter is 17*7c3d14c8STreehugger Robot// passed in a R0/R1 pair and a signle precision result is returned in R0. 18*7c3d14c8STreehugger Robot// 19*7c3d14c8STreehugger Robot .syntax unified 20*7c3d14c8STreehugger Robot .p2align 2 21*7c3d14c8STreehugger RobotDEFINE_COMPILERRT_FUNCTION(__truncdfsf2vfp) 22*7c3d14c8STreehugger Robot vmov d7, r0, r1 // load double from r0/r1 pair 23*7c3d14c8STreehugger Robot vcvt.f32.f64 s15, d7 // convert double to single (trucate precision) 24*7c3d14c8STreehugger Robot vmov r0, s15 // return result in r0 25*7c3d14c8STreehugger Robot bx lr 26*7c3d14c8STreehugger RobotEND_COMPILERRT_FUNCTION(__truncdfsf2vfp) 27*7c3d14c8STreehugger Robot 28*7c3d14c8STreehugger RobotNO_EXEC_STACK_DIRECTIVE 29*7c3d14c8STreehugger Robot 30