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fpu-init
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2 Commits (a3857aac940437c18a46d518929ea7e78ac7e61e)

Author SHA1 Message Date
Paul Mackerras 0c714f1be6 execute: Move popcnt and prty instructions into the logical unit 
This implements logic in the logical entity to calculate the results
of the popcnt* and prty* instructions.  We now have one insn_type_t
value for the 3 popcnt variants and one for the two prty variants,
using the length field of the decode_rom_t to distinguish between
them.  The implementations in logical.vhdl using recursive
algorithms rather than the simple functions in ppc_fx_insns.vhdl.

This gives a saving of about 140 slice LUTs on the A7-100 and
improves timing slightly.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
 5 years ago
Anton Blanchard b8fb721b81 Consolidate logical instructions 
Consolidate and/andc/nand, or/orc/nor and xor/eqv, using a common
invert on the input and output. This saves us about 200 LUTs.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago