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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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3646 __ cmp(array_length, Operand(0)); | 3646 __ cmp(array_length, Operand(0)); |
3647 __ Assert(gt, "No empty arrays here in EmitFastAsciiArrayJoin"); | 3647 __ Assert(gt, "No empty arrays here in EmitFastAsciiArrayJoin"); |
3648 } | 3648 } |
3649 __ bind(&loop); | 3649 __ bind(&loop); |
3650 __ ldr(string, MemOperand(element, kPointerSize, PostIndex)); | 3650 __ ldr(string, MemOperand(element, kPointerSize, PostIndex)); |
3651 __ JumpIfSmi(string, &bailout); | 3651 __ JumpIfSmi(string, &bailout); |
3652 __ ldr(scratch1, FieldMemOperand(string, HeapObject::kMapOffset)); | 3652 __ ldr(scratch1, FieldMemOperand(string, HeapObject::kMapOffset)); |
3653 __ ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); | 3653 __ ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
3654 __ JumpIfInstanceTypeIsNotSequentialAscii(scratch1, scratch2, &bailout); | 3654 __ JumpIfInstanceTypeIsNotSequentialAscii(scratch1, scratch2, &bailout); |
3655 __ ldr(scratch1, FieldMemOperand(string, SeqAsciiString::kLengthOffset)); | 3655 __ ldr(scratch1, FieldMemOperand(string, SeqAsciiString::kLengthOffset)); |
3656 __ add(string_length, string_length, Operand(scratch1)); | 3656 __ add(string_length, string_length, Operand(scratch1), SetCC); |
3657 __ b(vs, &bailout); | 3657 __ b(vs, &bailout); |
3658 __ cmp(element, elements_end); | 3658 __ cmp(element, elements_end); |
3659 __ b(lt, &loop); | 3659 __ b(lt, &loop); |
3660 | 3660 |
3661 // If array_length is 1, return elements[0], a string. | 3661 // If array_length is 1, return elements[0], a string. |
3662 __ cmp(array_length, Operand(1)); | 3662 __ cmp(array_length, Operand(1)); |
3663 __ b(ne, ¬_size_one_array); | 3663 __ b(ne, ¬_size_one_array); |
3664 __ ldr(r0, FieldMemOperand(elements, FixedArray::kHeaderSize)); | 3664 __ ldr(r0, FieldMemOperand(elements, FixedArray::kHeaderSize)); |
3665 __ b(&done); | 3665 __ b(&done); |
3666 | 3666 |
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3683 // smi but the other values are, so the result is a smi | 3683 // smi but the other values are, so the result is a smi |
3684 __ ldr(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset)); | 3684 __ ldr(scratch1, FieldMemOperand(separator, SeqAsciiString::kLengthOffset)); |
3685 __ sub(string_length, string_length, Operand(scratch1)); | 3685 __ sub(string_length, string_length, Operand(scratch1)); |
3686 __ smull(scratch2, ip, array_length, scratch1); | 3686 __ smull(scratch2, ip, array_length, scratch1); |
3687 // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are | 3687 // Check for smi overflow. No overflow if higher 33 bits of 64-bit result are |
3688 // zero. | 3688 // zero. |
3689 __ cmp(ip, Operand(0)); | 3689 __ cmp(ip, Operand(0)); |
3690 __ b(ne, &bailout); | 3690 __ b(ne, &bailout); |
3691 __ tst(scratch2, Operand(0x80000000)); | 3691 __ tst(scratch2, Operand(0x80000000)); |
3692 __ b(ne, &bailout); | 3692 __ b(ne, &bailout); |
3693 __ add(string_length, string_length, Operand(scratch2)); | 3693 __ add(string_length, string_length, Operand(scratch2), SetCC); |
3694 __ b(vs, &bailout); | 3694 __ b(vs, &bailout); |
3695 __ SmiUntag(string_length); | 3695 __ SmiUntag(string_length); |
3696 | 3696 |
3697 // Get first element in the array to free up the elements register to be used | 3697 // Get first element in the array to free up the elements register to be used |
3698 // for the result. | 3698 // for the result. |
3699 __ add(element, | 3699 __ add(element, |
3700 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); | 3700 elements, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
3701 result = elements; // End of live range for elements. | 3701 result = elements; // End of live range for elements. |
3702 elements = no_reg; | 3702 elements = no_reg; |
3703 // Live values in registers: | 3703 // Live values in registers: |
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4519 *context_length = 0; | 4519 *context_length = 0; |
4520 return previous_; | 4520 return previous_; |
4521 } | 4521 } |
4522 | 4522 |
4523 | 4523 |
4524 #undef __ | 4524 #undef __ |
4525 | 4525 |
4526 } } // namespace v8::internal | 4526 } } // namespace v8::internal |
4527 | 4527 |
4528 #endif // V8_TARGET_ARCH_ARM | 4528 #endif // V8_TARGET_ARCH_ARM |
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