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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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