Added a few functions to stuff values into bitfields in an instruction.
--HG-- extra : convert_revision : 507d7e13fd6276acf36b75eba31dff5e8080113f
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@ -69,4 +69,28 @@ sext(uint64_t val)
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return sign_bit ? (val | ~mask(N)) : val;
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}
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/**
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* Return val with bits first to last set to bit_val
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*/
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template <class T, class B>
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inline
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T
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insertBits(T val, int first, int last, B bit_val)
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{
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T bmask = mask(first - last + 1) << last;
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return ((bit_val << last) & bmask) | (val & ~bmask);
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}
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/**
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* A convenience function to replace bits first to last of val with bit_val
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* in place.
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*/
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template <class T, class B>
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inline
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void
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replaceBits(T& val, int first, int last, B bit_val)
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{
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val = insertBits(val, first, last, bit_val);
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}
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#endif // __BASE_BITFIELD_HH__
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