openpower/sv/register_type_tags.mdwn

   1 [[!tag standards]]
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   3 # Register Type Tags
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   5 A concept present in processors such as Texas Instruments DSPs and in the Mill Architecture to an advanced level, register "tags" allow the meaning and behaviour of instructions to change, polymorphically.
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   7 This allows instructions originally designed to only be IEEE754 FP64 fir example to become IEEE754 FP128 or even complex mumbers.  With SVP64 supporting [[sv/remap]] it is not conceptually that much of a leap to support complex numbers, given that the hardware to do so is already in place.
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   9 Links:
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  11 * <http://lists.libre-soc.org/pipermail/libre-soc-dev/2021-June/003256.html>