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      1 //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. 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 	.syntax unified
     19 	.align 2
     20 DEFINE_COMPILERRT_FUNCTION(__subdf3vfp)
     21 	vmov 	d6, r0, r1         // move first param from r0/r1 pair into d6
     22 	vmov 	d7, r2, r3         // move second param from r2/r3 pair into d7
     23 	vsub.f64 d6, d6, d7
     24 	vmov 	r0, r1, d6         // move result back to r0/r1 pair
     25 	bx	lr
     26