Migrate Math.Min/Max to CodeStubAssembler

src/builtins/mips64/builtins-mips64.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 103 matching lines @@
 
   // Run the native code for the Array function called as a normal function.
   // Tail call a stub.
   __ mov(a3, a1);
   __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
   ArrayConstructorStub stub(masm->isolate());
   __ TailCallStub(&stub);
 }
 
 // static
-void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) {
-  // ----------- S t a t e -------------
-  //  -- a0                     : number of arguments
-  //  -- a1                     : function
-  //  -- cp                     : context
-  //  -- ra                     : return address
-  //  -- sp[(argc - n - 1) * 8] : arg[n] (zero-based)
-  //  -- sp[argc * 8]           : receiver
-  // -----------------------------------
-  Heap::RootListIndex const root_index =
-      (kind == MathMaxMinKind::kMin) ? Heap::kInfinityValueRootIndex
-                                     : Heap::kMinusInfinityValueRootIndex;
-
-  // Load the accumulator with the default return value (either -Infinity or
-  // +Infinity), with the tagged value in t1 and the double value in f0.
-  __ LoadRoot(t1, root_index);
-  __ ldc1(f0, FieldMemOperand(t1, HeapNumber::kValueOffset));
-
-  Label done_loop, loop, done;
-  __ mov(a3, a0);
-  __ bind(&loop);
-  {
-    // Check if all parameters done.
-    __ Dsubu(a3, a3, Operand(1));
-    __ Branch(&done_loop, lt, a3, Operand(zero_reg));
-
-    // Load the next parameter tagged value into a2.
-    __ Dlsa(at, sp, a3, kPointerSizeLog2);
-    __ ld(a2, MemOperand(at));
-
-    // Load the double value of the parameter into f2, maybe converting the
-    // parameter to a number first using the ToNumber builtin if necessary.
-    Label convert, convert_smi, convert_number, done_convert;
-    __ bind(&convert);
-    __ JumpIfSmi(a2, &convert_smi);
-    __ ld(a4, FieldMemOperand(a2, HeapObject::kMapOffset));
-    __ JumpIfRoot(a4, Heap::kHeapNumberMapRootIndex, &convert_number);
-    {
-      // Parameter is not a Number, use the ToNumber builtin to convert it.
-      FrameScope scope(masm, StackFrame::MANUAL);
-      __ SmiTag(a0);
-      __ SmiTag(a3);
-      __ EnterBuiltinFrame(cp, a1, a0);
-      __ Push(t1, a3);
-      __ mov(a0, a2);
-      __ Call(masm->isolate()->builtins()->ToNumber(), RelocInfo::CODE_TARGET);
-      __ mov(a2, v0);
-      __ Pop(t1, a3);
-      __ LeaveBuiltinFrame(cp, a1, a0);
-      __ SmiUntag(a3);
-      __ SmiUntag(a0);
-      {
-        // Restore the double accumulator value (f0).
-        Label restore_smi, done_restore;
-        __ JumpIfSmi(t1, &restore_smi);
-        __ ldc1(f0, FieldMemOperand(t1, HeapNumber::kValueOffset));
-        __ jmp(&done_restore);
-        __ bind(&restore_smi);
-        __ SmiToDoubleFPURegister(t1, f0, a4);
-        __ bind(&done_restore);
-      }
-    }
-    __ jmp(&convert);
-    __ bind(&convert_number);
-    __ ldc1(f2, FieldMemOperand(a2, HeapNumber::kValueOffset));
-    __ jmp(&done_convert);
-    __ bind(&convert_smi);
-    __ SmiToDoubleFPURegister(a2, f2, a4);
-    __ bind(&done_convert);
-
-    // Perform the actual comparison with using Min/Max macro instructions the
-    // accumulator value on the left hand side (f0) and the next parameter value
-    // on the right hand side (f2).
-    // We need to work out which HeapNumber (or smi) the result came from.
-    Label compare_nan, ool_min, ool_max;
-    __ BranchF(nullptr, &compare_nan, eq, f0, f2);
-    __ Move(a4, f0);
-    if (kind == MathMaxMinKind::kMin) {
-      __ Float64Min(f0, f0, f2, &ool_min);
-    } else {
-      DCHECK(kind == MathMaxMinKind::kMax);
-      __ Float64Max(f0, f0, f2, &ool_max);
-    }
-    __ jmp(&done);
-
-    __ bind(&ool_min);
-    __ Float64MinOutOfLine(f0, f0, f2);
-    __ jmp(&done);
-
-    __ bind(&ool_max);
-    __ Float64MaxOutOfLine(f0, f0, f2);
-
-    __ bind(&done);
-    __ Move(at, f0);
-    __ Branch(&loop, eq, a4, Operand(at));
-    __ mov(t1, a2);
-    __ jmp(&loop);
-
-    // At least one side is NaN, which means that the result will be NaN too.
-    __ bind(&compare_nan);
-    __ LoadRoot(t1, Heap::kNanValueRootIndex);
-    __ ldc1(f0, FieldMemOperand(t1, HeapNumber::kValueOffset));
-    __ jmp(&loop);
-  }
-
-  __ bind(&done_loop);
-  // Drop all slots, including the receiver.
-  __ Daddu(a0, a0, Operand(1));
-  __ Dlsa(sp, sp, a0, kPointerSizeLog2);
-  __ Ret(USE_DELAY_SLOT);
-  __ mov(v0, t1);  // In delay slot.
-}
-
-// static
 void Builtins::Generate_NumberConstructor(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a0                     : number of arguments
   //  -- a1                     : constructor function
   //  -- cp                     : context
   //  -- ra                     : return address
   //  -- sp[(argc - n - 1) * 8] : arg[n] (zero based)
   //  -- sp[argc * 8]           : receiver
   // -----------------------------------
 
@@ skipping 2999 matching lines @@
     __ break_(0xCC);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64