regop.isa (6452:751b06abbaae) regop.isa (6453:1d4dbb357560)
1// Copyright (c) 2007-2008 The Hewlett-Packard Development Company
2// All rights reserved.
3//
4// Redistribution and use of this software in source and binary forms,
5// with or without modification, are permitted provided that the
6// following conditions are met:
7//
8// The software must be used only for Non-Commercial Use which means any

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772 DestReg = merge(DestReg, top | bottom, dataSize);
773 }
774 else
775 DestReg = merge(DestReg, DestReg, dataSize);
776 '''
777 flag_code = '''
778 // If the shift amount is zero, no flags should be modified.
779 if (shiftAmt) {
1// Copyright (c) 2007-2008 The Hewlett-Packard Development Company
2// All rights reserved.
3//
4// Redistribution and use of this software in source and binary forms,
5// with or without modification, are permitted provided that the
6// following conditions are met:
7//
8// The software must be used only for Non-Commercial Use which means any

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772 DestReg = merge(DestReg, top | bottom, dataSize);
773 }
774 else
775 DestReg = merge(DestReg, DestReg, dataSize);
776 '''
777 flag_code = '''
778 // If the shift amount is zero, no flags should be modified.
779 if (shiftAmt) {
780 int origCFBit = (ccFlagBits & CFBit) ? 1 : 0;
780 //Zero out any flags we might modify. This way we only have to
781 //worry about setting them.
782 ccFlagBits = ccFlagBits & ~(ext & (CFBit | ECFBit | OFBit));
783 //Figure out what the OF bit should be.
781 //Zero out any flags we might modify. This way we only have to
782 //worry about setting them.
783 ccFlagBits = ccFlagBits & ~(ext & (CFBit | ECFBit | OFBit));
784 //Figure out what the OF bit should be.
784 if ((ext & OFBit) && ((ccFlagBits & CFBit) ^
785 bits(SrcReg1, dataSize * 8 - 1)))
785 if ((ext & OFBit) && (origCFBit ^
786 bits(SrcReg1, dataSize * 8 - 1))) {
786 ccFlagBits = ccFlagBits | OFBit;
787 ccFlagBits = ccFlagBits | OFBit;
788 }
787 //If some combination of the CF bits need to be set, set them.
788 if ((ext & (CFBit | ECFBit)) && bits(SrcReg1, shiftAmt - 1))
789 ccFlagBits = ccFlagBits | (ext & (CFBit | ECFBit));
790 //Use the regular mechanisms to calculate the other flags.
791 ccFlagBits = genFlags(ccFlagBits, ext & ~(CFBit | ECFBit | OFBit),
792 DestReg, psrc1, op2);
793 }
794 '''

--- 517 unchanged lines hidden --- 		789 //If some combination of the CF bits need to be set, set them.
790 if ((ext & (CFBit | ECFBit)) && bits(SrcReg1, shiftAmt - 1))
791 ccFlagBits = ccFlagBits | (ext & (CFBit | ECFBit));
792 //Use the regular mechanisms to calculate the other flags.
793 ccFlagBits = genFlags(ccFlagBits, ext & ~(CFBit | ECFBit | OFBit),
794 DestReg, psrc1, op2);
795 }
796 '''

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