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Diffstat (limited to 'mpi/mips3/README')
-rw-r--r-- | mpi/mips3/README | 23 |
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diff --git a/mpi/mips3/README b/mpi/mips3/README deleted file mode 100644 index e94b2c746..000000000 --- a/mpi/mips3/README +++ /dev/null @@ -1,23 +0,0 @@ -This directory contains mpn functions optimized for MIPS3. Example of -processors that implement MIPS3 are R4000, R4400, R4600, R4700, and R8000. - -RELEVANT OPTIMIZATION ISSUES - -1. On the R4000 and R4400, branches, both the plain and the "likely" ones, - take 3 cycles to execute. (The fastest possible loop will take 4 cycles, - because of the delay insn.) - - On the R4600, branches takes a single cycle - - On the R8000, branches often take no noticable cycles, as they are - executed in a separate function unit.. - -2. The R4000 and R4400 have a load latency of 4 cycles. - -3. On the R4000 and R4400, multiplies take a data-dependent number of - cycles, contrary to the SGI documentation. There seem to be 3 or 4 - possible latencies. - -STATUS - -Good... |