src/compiler-rt/lib/builtins/arm/mulsf3vfp.S

   1 //===-- mulsf3vfp.S - Implement mulsf3vfp ---------------------------------===//
   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 float __mulsf3vfp(float a, float b);
  14 //
  15 // Multiplies two single precision floating point numbers using the Darwin
  16 // calling convention where single arguments are passsed like 32-bit ints.
  17 //
  18         .syntax unified
  19         .p2align 2
  20 DEFINE_COMPILERRT_FUNCTION(__mulsf3vfp)
  21         vmov    s14, r0         // move first param from r0 into float register
  22         vmov    s15, r1         // move second param from r1 into float register
  23         vmul.f32 s13, s14, s15
  24         vmov    r0, s13         // move result back to r0
  25         bx      lr
  26 END_COMPILERRT_FUNCTION(__mulsf3vfp)