1*0a6a1f1dSLionel Sambuc//===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// 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 __subdf3vfp(double a, double b); 14*0a6a1f1dSLionel Sambuc// 15*0a6a1f1dSLionel Sambuc// Returns difference between two double precision floating point numbers using 16*0a6a1f1dSLionel Sambuc// the Darwin calling convention where double arguments are passsed in GPR pairs 17*0a6a1f1dSLionel Sambuc// 18*0a6a1f1dSLionel Sambuc .syntax unified 19*0a6a1f1dSLionel Sambuc .p2align 2 20*0a6a1f1dSLionel SambucDEFINE_COMPILERRT_FUNCTION(__subdf3vfp) 21*0a6a1f1dSLionel Sambuc vmov d6, r0, r1 // move first param from r0/r1 pair into d6 22*0a6a1f1dSLionel Sambuc vmov d7, r2, r3 // move second param from r2/r3 pair into d7 23*0a6a1f1dSLionel Sambuc vsub.f64 d6, d6, d7 24*0a6a1f1dSLionel Sambuc vmov r0, r1, d6 // move result back to r0/r1 pair 25*0a6a1f1dSLionel Sambuc bx lr 26*0a6a1f1dSLionel SambucEND_COMPILERRT_FUNCTION(__subdf3vfp) 27