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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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| 710 __ cmp(int_scratch, Operand::Zero()); | 710 __ cmp(int_scratch, Operand::Zero()); |
| 711 __ mov(dst2, int_scratch); | 711 __ mov(dst2, int_scratch); |
| 712 __ mov(dst1, int_scratch); | 712 __ mov(dst1, int_scratch); |
| 713 __ b(eq, &done); | 713 __ b(eq, &done); |
| 714 | 714 |
| 715 // Preload the sign of the value. | 715 // Preload the sign of the value. |
| 716 __ and_(dst2, int_scratch, Operand(HeapNumber::kSignMask), SetCC); | 716 __ and_(dst2, int_scratch, Operand(HeapNumber::kSignMask), SetCC); |
| 717 // Get the absolute value of the object (as an unsigned integer). | 717 // Get the absolute value of the object (as an unsigned integer). |
| 718 __ rsb(int_scratch, int_scratch, Operand::Zero(), SetCC, mi); | 718 __ rsb(int_scratch, int_scratch, Operand::Zero(), SetCC, mi); |
| 719 | 719 |
| 720 // Get mantisssa[51:20]. | 720 // Get mantissa[51:20]. |
| 721 | 721 |
| 722 // Get the position of the first set bit. | 722 // Get the position of the first set bit. |
| 723 __ CountLeadingZeros(dst1, int_scratch, scratch2); | 723 __ CountLeadingZeros(dst1, int_scratch, scratch2); |
| 724 __ rsb(dst1, dst1, Operand(31)); | 724 __ rsb(dst1, dst1, Operand(31)); |
| 725 | 725 |
| 726 // Set the exponent. | 726 // Set the exponent. |
| 727 __ add(scratch2, dst1, Operand(HeapNumber::kExponentBias)); | 727 __ add(scratch2, dst1, Operand(HeapNumber::kExponentBias)); |
| 728 __ Bfi(dst2, scratch2, scratch2, | 728 __ Bfi(dst2, scratch2, scratch2, |
| 729 HeapNumber::kExponentShift, HeapNumber::kExponentBits); | 729 HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 730 | 730 |
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| 944 __ cmp(tmp, Operand(30)); | 944 __ cmp(tmp, Operand(30)); |
| 945 __ b(gt, not_int32); | 945 __ b(gt, not_int32); |
| 946 // - Bits [21:0] in the mantissa are not null. | 946 // - Bits [21:0] in the mantissa are not null. |
| 947 __ tst(src2, Operand(0x3fffff)); | 947 __ tst(src2, Operand(0x3fffff)); |
| 948 __ b(ne, not_int32); | 948 __ b(ne, not_int32); |
| 949 | 949 |
| 950 // Otherwise the exponent needs to be big enough to shift left all the | 950 // Otherwise the exponent needs to be big enough to shift left all the |
| 951 // non zero bits left. So we need the (30 - exponent) last bits of the | 951 // non zero bits left. So we need the (30 - exponent) last bits of the |
| 952 // 31 higher bits of the mantissa to be null. | 952 // 31 higher bits of the mantissa to be null. |
| 953 // Because bits [21:0] are null, we can check instead that the | 953 // Because bits [21:0] are null, we can check instead that the |
| 954 // (32 - exponent) last bits of the 32 higher bits of the mantisssa are null. | 954 // (32 - exponent) last bits of the 32 higher bits of the mantissa are null. |
| 955 | 955 |
| 956 // Get the 32 higher bits of the mantissa in dst. | 956 // Get the 32 higher bits of the mantissa in dst. |
| 957 __ Ubfx(dst, | 957 __ Ubfx(dst, |
| 958 src2, | 958 src2, |
| 959 HeapNumber::kMantissaBitsInTopWord, | 959 HeapNumber::kMantissaBitsInTopWord, |
| 960 32 - HeapNumber::kMantissaBitsInTopWord); | 960 32 - HeapNumber::kMantissaBitsInTopWord); |
| 961 __ orr(dst, | 961 __ orr(dst, |
| 962 dst, | 962 dst, |
| 963 Operand(src1, LSL, HeapNumber::kNonMantissaBitsInTopWord)); | 963 Operand(src1, LSL, HeapNumber::kNonMantissaBitsInTopWord)); |
| 964 | 964 |
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| 4503 | 4503 |
| 4504 __ bind(&arguments_test); | 4504 __ bind(&arguments_test); |
| 4505 __ cmp(r9, Operand(r2)); | 4505 __ cmp(r9, Operand(r2)); |
| 4506 __ b(lt, &arguments_loop); | 4506 __ b(lt, &arguments_loop); |
| 4507 | 4507 |
| 4508 // Return and remove the on-stack parameters. | 4508 // Return and remove the on-stack parameters. |
| 4509 __ add(sp, sp, Operand(3 * kPointerSize)); | 4509 __ add(sp, sp, Operand(3 * kPointerSize)); |
| 4510 __ Ret(); | 4510 __ Ret(); |
| 4511 | 4511 |
| 4512 // Do the runtime call to allocate the arguments object. | 4512 // Do the runtime call to allocate the arguments object. |
| 4513 // r2 = argument count (taggged) | 4513 // r2 = argument count (tagged) |
| 4514 __ bind(&runtime); | 4514 __ bind(&runtime); |
| 4515 __ str(r2, MemOperand(sp, 0 * kPointerSize)); // Patch argument count. | 4515 __ str(r2, MemOperand(sp, 0 * kPointerSize)); // Patch argument count. |
| 4516 __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); | 4516 __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 4517 } | 4517 } |
| 4518 | 4518 |
| 4519 | 4519 |
| 4520 void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { | 4520 void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { |
| 4521 // sp[0] : number of parameters | 4521 // sp[0] : number of parameters |
| 4522 // sp[4] : receiver displacement | 4522 // sp[4] : receiver displacement |
| 4523 // sp[8] : function | 4523 // sp[8] : function |
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| 7314 __ StoreNumberToDoubleElements(r0, r3, r1, r5, r6, r7, r9, r10, | 7314 __ StoreNumberToDoubleElements(r0, r3, r1, r5, r6, r7, r9, r10, |
| 7315 &slow_elements); | 7315 &slow_elements); |
| 7316 __ Ret(); | 7316 __ Ret(); |
| 7317 } | 7317 } |
| 7318 | 7318 |
| 7319 #undef __ | 7319 #undef __ |
| 7320 | 7320 |
| 7321 } } // namespace v8::internal | 7321 } } // namespace v8::internal |
| 7322 | 7322 |
| 7323 #endif // V8_TARGET_ARCH_ARM | 7323 #endif // V8_TARGET_ARCH_ARM |
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