1This directory contains mpn functions optimized for MIPS3.  Example of
2processors that implement MIPS3 are R4000, R4400, R4600, R4700, and R8000.
3
4RELEVANT OPTIMIZATION ISSUES
5
61. On the R4000 and R4400, branches, both the plain and the "likely" ones,
7   take 3 cycles to execute.  (The fastest possible loop will take 4 cycles,
8   because of the delay insn.)
9
10   On the R4600, branches takes a single cycle
11
12   On the R8000, branches often take no noticable cycles, as they are
13   executed in a separate function unit..
14
152. The R4000 and R4400 have a load latency of 4 cycles.
16
173. On the R4000 and R4400, multiplies take a data-dependent number of
18   cycles, contrary to the SGI documentation.  There seem to be 3 or 4
19   possible latencies.
20
21STATUS
22
23Good...
24