examples/add4-double.cc

// Copyright 2014, ARM Limited
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#include "examples.h"

#define BUF_SIZE (4096)
#define __ masm->

void GenerateAdd4Double(MacroAssembler* masm) {
  // double Add4Double(uint64_t a, double b, uint64_t c, double d)
  //  Argument locations:
  //    a -> x0
  //    b -> d0
  //    c -> x1
  //    d -> d1

  // Turn 'a' and 'c' into double values.
  __ Ucvtf(d2, x0);
  __ Ucvtf(d3, x1);

  // Add everything together.
  __ Fadd(d0, d0, d1);
  __ Fadd(d2, d2, d3);
  __ Fadd(d0, d0, d2);

  // The return value is in d0.
  __ Ret();
}


#ifndef TEST_EXAMPLES
#ifdef VIXL_INCLUDE_SIMULATOR
int main(void) {
  // Create and initialize the assembler and the simulator.
  byte assm_buf[BUF_SIZE];
  MacroAssembler masm(assm_buf, BUF_SIZE);
  Decoder decoder;
  Simulator simulator(&decoder);

  // Generate the code for the example function.
  Label add4_double;
  masm.Bind(&add4_double);
  GenerateAdd4Double(&masm);
  masm.FinalizeCode();

  // Run the example function.
  uint64_t a = 21;
  double b = 987.3654;
  uint64_t c = 4387;
  double d = 36.698754;
  simulator.set_xreg(0, a);
  simulator.set_dreg(0, b);
  simulator.set_xreg(1, c);
  simulator.set_dreg(1, d);
  simulator.RunFrom(masm.GetLabelAddress<Instruction*>(&add4_double));
  // clang-format off
  printf("%" PRIu64 " + %f + %" PRIu64 " + %f = %f\n",
         a, b, c, d, simulator.dreg(0));
  // clang-format on

  return 0;
}
#else
// Without the simulator there is nothing to test.
int main(void) { return 0; }
#endif  // VIXL_INCLUDE_SIMULATOR
#endif  // TEST_EXAMPLES