A64 support for DoubleToIStub (truncating).

test/cctest/test-code-stubs-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Rrdistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Rrdistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Rrdistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 40 matching lines @@
                                                  &actual_size,
                                                  true));
   CHECK(buffer);
   HandleScope handles(isolate);
   MacroAssembler masm(isolate, buffer, static_cast<int>(actual_size));
   DoubleToIStub stub(source_reg, destination_reg, 0, true, inline_fastpath);
 
   byte* start = stub.GetCode(isolate)->instruction_start();
   Label done;
 
-  // Save callee save registers.
-  __ Push(r7, r6, r5, r4);
-  __ Push(lr);
+  __ SetStackPointer(csp);
+  __ PushCalleeSavedRegisters();
+  __ Mov(jssp, csp);
+  __ SetStackPointer(jssp);
 
-  // For softfp, move the input value into d0.
-  if (!masm.use_eabi_hardfloat()) {
-    __ vmov(d0, r0, r1);
-  }
   // Push the double argument.
-  __ sub(sp, sp, Operand(kDoubleSize));
-  __ vstr(d0, sp, 0);
-  if (!source_reg.is(sp)) {
-    __ mov(source_reg, sp);
+  __ Push(d0);
+  if (!source_reg.is(jssp)) {
+    __ Mov(source_reg, jssp);
   }
 
   // Save registers make sure they don't get clobbered.
   int source_reg_offset = kDoubleSize;
   int reg_num = 0;
   for (;reg_num < Register::NumAllocatableRegisters(); ++reg_num) {
     Register reg = Register::from_code(reg_num);
     if (!reg.is(destination_reg)) {
-      __ push(reg);
+      __ Push(reg);
       source_reg_offset += kPointerSize;
     }
   }
 
   // Re-push the double argument.
-  __ sub(sp, sp, Operand(kDoubleSize));
-  __ vstr(d0, sp, 0);
+  __ Push(d0);
 
   // Call through to the actual stub
   if (inline_fastpath) {
-    __ vldr(d0, MemOperand(source_reg));
+    __ Ldr(d0, MemOperand(source_reg));
     __ TryInlineTruncateDoubleToI(destination_reg, d0, &done);
-    if (destination_reg.is(source_reg) && !source_reg.is(sp)) {
+    if (destination_reg.is(source_reg)) {
       // Restore clobbered source_reg.
-      __ add(source_reg, sp, Operand(source_reg_offset));
+      __ add(source_reg, jssp, Operand(source_reg_offset));
     }
   }
   __ Call(start, RelocInfo::EXTERNAL_REFERENCE);
   __ bind(&done);
 
-  __ add(sp, sp, Operand(kDoubleSize));
+  __ Drop(1, kDoubleSize);
 
-  // Make sure no registers have been unexpectedly clobbered
+  // // Make sure no registers have been unexpectedly clobbered
   for (--reg_num; reg_num >= 0; --reg_num) {
     Register reg = Register::from_code(reg_num);
     if (!reg.is(destination_reg)) {
-      __ ldr(ip, MemOperand(sp, 0));
-      __ cmp(reg, ip);
+      __ Pop(ip0);
+      __ cmp(reg, ip0);
       __ Assert(eq, kRegisterWasClobbered);
-      __ add(sp, sp, Operand(kPointerSize));
     }
   }
 
-  __ add(sp, sp, Operand(kDoubleSize));
+  __ Drop(1, kDoubleSize);
 
-  if (!destination_reg.is(r0))
-    __ mov(r0, destination_reg);
+  if (!destination_reg.is(x0))
+    __ Mov(x0, destination_reg);
 
   // Restore callee save registers.
-  __ Pop(lr);
-  __ Pop(r7, r6, r5, r4);
+  __ Mov(csp, jssp);
+  __ SetStackPointer(csp);
+  __ PopCalleeSavedRegisters();
 
-  __ Ret(0);
+  __ Ret();
 
   CodeDesc desc;
   masm.GetCode(&desc);
   CPU::FlushICache(buffer, actual_size);
   return (reinterpret_cast<ConvertDToIFunc>(
       reinterpret_cast<intptr_t>(buffer)));
 }
 
 #undef __
 
 
 static Isolate* GetIsolateFrom(LocalContext* context) {
   return reinterpret_cast<Isolate*>((*context)->GetIsolate());
 }
 
 
 int32_t RunGeneratedCodeCallWrapper(ConvertDToIFunc func,
                                     double from) {
 #ifdef USE_SIMULATOR
-  return CALL_GENERATED_FP_INT(func, from, 0);
+  return Simulator::current(Isolate::Current())->CallInt64(
+      FUNCTION_ADDR(func), Simulator::CallArgument(from),
+      Simulator::CallArgument::End());
 #else
   return (*func)(from);
 #endif
 }
 
 
 TEST(ConvertDToI) {
   CcTest::InitializeVM();
   LocalContext context;
   Isolate* isolate = GetIsolateFrom(&context);
   HandleScope scope(isolate);
 
 #if DEBUG
   // Verify that the tests actually work with the C version. In the release
   // code, the compiler optimizes it away because it's all constant, but does it
   // wrong, triggering an assert on gcc.
   RunAllTruncationTests(&ConvertDToICVersion);
 #endif
 
-  Register source_registers[] = {sp, r0, r1, r2, r3, r4, r5, r6, r7};
-  Register dest_registers[] = {r0, r1, r2, r3, r4, r5, r6, r7};
+  Register source_registers[] = {jssp, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9,
+                                 x10, x11, x12, x13, x14, x15, x18, x19, x20,
+                                 x21, x22, x23, x24};
+  Register dest_registers[] = {x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11,
+                               x12, x13, x14, x15, x18, x19, x20, x21, x22, x23,
+                               x24};
 
   for (size_t s = 0; s < sizeof(source_registers) / sizeof(Register); s++) {
     for (size_t d = 0; d < sizeof(dest_registers) / sizeof(Register); d++) {
       RunAllTruncationTests(
           RunGeneratedCodeCallWrapper,
           MakeConvertDToIFuncTrampoline(isolate,
                                         source_registers[s],
                                         dest_registers[d],
                                         false));
       RunAllTruncationTests(
           RunGeneratedCodeCallWrapper,
           MakeConvertDToIFuncTrampoline(isolate,
                                         source_registers[s],
                                         dest_registers[d],
                                         true));
     }
   }
 }