[builtins] Introduce proper Float64Atan and Float64Atan2 operators.

src/compiler/arm/code-generator-arm.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
@@ skipping 389 matching lines @@
   } while (0)
 
 #define ASSEMBLE_ATOMIC_STORE_INTEGER(asm_instr)                      \
   do {                                                                \
     __ dmb(ISH);                                                      \
     __ asm_instr(i.InputRegister(2),                                  \
                  MemOperand(i.InputRegister(0), i.InputRegister(1))); \
     __ dmb(ISH);                                                      \
   } while (0)
 
+#define ASSEMBLE_IEEE754_BINOP(name)                                           \
+  do {                                                                         \
+    /* TODO(bmeurer): We should really get rid of this special instruction, */ \
+    /* and generate a CallAddress instruction instead. */                      \
+    FrameScope scope(masm(), StackFrame::MANUAL);                              \
+    __ PrepareCallCFunction(0, 2, kScratchReg);                                \
+    __ MovToFloatParameters(i.InputFloat64Register(0),                         \
+                            i.InputFloat64Register(1));                        \
+    __ CallCFunction(ExternalReference::ieee754_##name##_function(isolate()),  \
+                     0, 2);                                                    \
+    /* Move the result in the double result register. */                       \
+    __ MovFromFloatResult(i.OutputFloat64Register());                          \
+    DCHECK_EQ(LeaveCC, i.OutputSBit());                                        \
+  } while (0)
+
 #define ASSEMBLE_IEEE754_UNOP(name)                                            \
   do {                                                                         \
     /* TODO(bmeurer): We should really get rid of this special instruction, */ \
     /* and generate a CallAddress instruction instead. */                      \
     FrameScope scope(masm(), StackFrame::MANUAL);                              \
     __ PrepareCallCFunction(0, 1, kScratchReg);                                \
     __ MovToFloatParameter(i.InputFloat64Register(0));                         \
     __ CallCFunction(ExternalReference::ieee754_##name##_function(isolate()),  \
                      0, 1);                                                    \
     /* Move the result in the double result register. */                       \
@@ skipping 261 matching lines @@
           frame_access_state()->GetFrameOffset(i.InputInt32(0));
       Register base;
       if (offset.from_stack_pointer()) {
         base = sp;
       } else {
         base = fp;
       }
       __ add(i.OutputRegister(0), base, Operand(offset.offset()));
       break;
     }
+    case kIeee754Float64Atan:
+      ASSEMBLE_IEEE754_UNOP(atan);
+      break;
+    case kIeee754Float64Atan2:
+      ASSEMBLE_IEEE754_BINOP(atan2);
+      break;
     case kIeee754Float64Log:
       ASSEMBLE_IEEE754_UNOP(log);
       break;
     case kIeee754Float64Log1p:
       ASSEMBLE_IEEE754_UNOP(log1p);
       break;
     case kArmAdd:
       __ add(i.OutputRegister(), i.InputRegister(0), i.InputOperand2(1),
              i.OutputSBit());
       break;
@@ skipping 1076 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8