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author | René Schümann <white06tiger@gmail.com> | 2015-03-14 19:56:55 +0000 |
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committer | René Schümann <white06tiger@gmail.com> | 2015-03-14 19:56:55 +0000 |
commit | c60aed5432e9cda277b9351de51e82dfb8e02475 (patch) | |
tree | 97ccd1ea8e2544f6a9673ee7d04c18b714877a35 /plugins/MirOTR/Libgcrypt/mpi/mips3/README | |
parent | d2b26b1f86326362f56540b5185fa09ab5f2779c (diff) |
MirOTR: part one of many file/folder structure changes
git-svn-id: http://svn.miranda-ng.org/main/trunk@12402 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/MirOTR/Libgcrypt/mpi/mips3/README')
-rw-r--r-- | plugins/MirOTR/Libgcrypt/mpi/mips3/README | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/plugins/MirOTR/Libgcrypt/mpi/mips3/README b/plugins/MirOTR/Libgcrypt/mpi/mips3/README new file mode 100644 index 0000000000..e94b2c7460 --- /dev/null +++ b/plugins/MirOTR/Libgcrypt/mpi/mips3/README @@ -0,0 +1,23 @@ +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... |