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Issue 813813003: Revert of Remove obsolete V8_INFINITY macro. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 6 years ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include <limits>
6
7 #include "src/v8.h" 5 #include "src/v8.h"
8 6
9 #if V8_TARGET_ARCH_ARM 7 #if V8_TARGET_ARCH_ARM
10 8
11 #include "src/base/bits.h" 9 #include "src/base/bits.h"
12 #include "src/bootstrapper.h" 10 #include "src/bootstrapper.h"
13 #include "src/code-stubs.h" 11 #include "src/code-stubs.h"
14 #include "src/codegen.h" 12 #include "src/codegen.h"
15 #include "src/ic/handler-compiler.h" 13 #include "src/ic/handler-compiler.h"
16 #include "src/ic/ic.h" 14 #include "src/ic/ic.h"
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777 // for non-constant cases of +/-0.5 as these hardly occur. 775 // for non-constant cases of +/-0.5 as these hardly occur.
778 Label not_plus_half; 776 Label not_plus_half;
779 777
780 // Test for 0.5. 778 // Test for 0.5.
781 __ vmov(double_scratch, 0.5, scratch); 779 __ vmov(double_scratch, 0.5, scratch);
782 __ VFPCompareAndSetFlags(double_exponent, double_scratch); 780 __ VFPCompareAndSetFlags(double_exponent, double_scratch);
783 __ b(ne, &not_plus_half); 781 __ b(ne, &not_plus_half);
784 782
785 // Calculates square root of base. Check for the special case of 783 // Calculates square root of base. Check for the special case of
786 // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). 784 // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13).
787 __ vmov(double_scratch, -std::numeric_limits<double>::infinity(), 785 __ vmov(double_scratch, -V8_INFINITY, scratch);
788 scratch);
789 __ VFPCompareAndSetFlags(double_base, double_scratch); 786 __ VFPCompareAndSetFlags(double_base, double_scratch);
790 __ vneg(double_result, double_scratch, eq); 787 __ vneg(double_result, double_scratch, eq);
791 __ b(eq, &done); 788 __ b(eq, &done);
792 789
793 // Add +0 to convert -0 to +0. 790 // Add +0 to convert -0 to +0.
794 __ vadd(double_scratch, double_base, kDoubleRegZero); 791 __ vadd(double_scratch, double_base, kDoubleRegZero);
795 __ vsqrt(double_result, double_scratch); 792 __ vsqrt(double_result, double_scratch);
796 __ jmp(&done); 793 __ jmp(&done);
797 794
798 __ bind(&not_plus_half); 795 __ bind(&not_plus_half);
799 __ vmov(double_scratch, -0.5, scratch); 796 __ vmov(double_scratch, -0.5, scratch);
800 __ VFPCompareAndSetFlags(double_exponent, double_scratch); 797 __ VFPCompareAndSetFlags(double_exponent, double_scratch);
801 __ b(ne, &call_runtime); 798 __ b(ne, &call_runtime);
802 799
803 // Calculates square root of base. Check for the special case of 800 // Calculates square root of base. Check for the special case of
804 // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). 801 // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13).
805 __ vmov(double_scratch, -std::numeric_limits<double>::infinity(), 802 __ vmov(double_scratch, -V8_INFINITY, scratch);
806 scratch);
807 __ VFPCompareAndSetFlags(double_base, double_scratch); 803 __ VFPCompareAndSetFlags(double_base, double_scratch);
808 __ vmov(double_result, kDoubleRegZero, eq); 804 __ vmov(double_result, kDoubleRegZero, eq);
809 __ b(eq, &done); 805 __ b(eq, &done);
810 806
811 // Add +0 to convert -0 to +0. 807 // Add +0 to convert -0 to +0.
812 __ vadd(double_scratch, double_base, kDoubleRegZero); 808 __ vadd(double_scratch, double_base, kDoubleRegZero);
813 __ vmov(double_result, 1.0, scratch); 809 __ vmov(double_result, 1.0, scratch);
814 __ vsqrt(double_scratch, double_scratch); 810 __ vsqrt(double_scratch, double_scratch);
815 __ vdiv(double_result, double_result, double_scratch); 811 __ vdiv(double_result, double_result, double_scratch);
816 __ jmp(&done); 812 __ jmp(&done);
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4758 MemOperand(fp, 6 * kPointerSize), 4754 MemOperand(fp, 6 * kPointerSize),
4759 NULL); 4755 NULL);
4760 } 4756 }
4761 4757
4762 4758
4763 #undef __ 4759 #undef __
4764 4760
4765 } } // namespace v8::internal 4761 } } // namespace v8::internal
4766 4762
4767 #endif // V8_TARGET_ARCH_ARM 4763 #endif // V8_TARGET_ARCH_ARM
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