1 //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "../assembly.h" 11 12 // 13 // extern double __subdf3vfp(double a, double b); 14 // 15 // Returns difference between two double precision floating point numbers using 16 // the Darwin calling convention where double arguments are passsed in GPR pairs 17 // 18 DEFINE_COMPILERRT_FUNCTION(__subdf3vfp) 19 fmdrr d6, r0, r1 // move first param from r0/r1 pair into d6 20 fmdrr d7, r2, r3 // move second param from r2/r3 pair into d7 21 fsubd d6, d6, d7 22 fmrrd r0, r1, d6 // move result back to r0/r1 pair 23 bx lr 24
