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