1*0a6a1f1dSLionel Sambuc//===-- extendsfdf2vfp.S - Implement extendsfdf2vfp -----------------------===// 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 double __extendsfdf2vfp(float a); 14*0a6a1f1dSLionel Sambuc// 15*0a6a1f1dSLionel Sambuc// Converts single precision float to double precision result. 16*0a6a1f1dSLionel Sambuc// Uses Darwin calling convention where a single precision parameter is 17*0a6a1f1dSLionel Sambuc// passed in a GPR and a double precision result is returned in R0/R1 pair. 18*0a6a1f1dSLionel Sambuc// 19*0a6a1f1dSLionel Sambuc .syntax unified 20*0a6a1f1dSLionel Sambuc .p2align 2 21*0a6a1f1dSLionel SambucDEFINE_COMPILERRT_FUNCTION(__extendsfdf2vfp) 22*0a6a1f1dSLionel Sambuc vmov s15, r0 // load float register from R0 23*0a6a1f1dSLionel Sambuc vcvt.f64.f32 d7, s15 // convert single to double 24*0a6a1f1dSLionel Sambuc vmov r0, r1, d7 // return result in r0/r1 pair 25*0a6a1f1dSLionel Sambuc bx lr 26*0a6a1f1dSLionel SambucEND_COMPILERRT_FUNCTION(__extendsfdf2vfp) 27