Hi: The original version of patches were here: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00099.html
This is a update version. please review, thanks. This series patches reorganize the Loongson -march=xxx and Loongson extensions instructions set. For long time, the Loongson extensions instructions set puts under -march=loongson3a option. We can't disable one of them when we need. The patch (1) split Loongson MultiMedia extensions Instructions (MMI) from loongson3a, add -mloongson-mmi/-mno-loongson-mmi option for enable/disable them. The patch (2) split Loongson EXTensions (EXT) instructions from loongson3a, add -mloongson-ext/-mno-loongson-ext option for enable/disable them. The patch (3) add Loongson EXTensions R2 (EXT2) instructions support, add -mloongson-ext2/-mno-loongson-ext2 option for enable/disable them. The patch (4) add Loongson 3A1000 processor support. The gs464 is a codename of 3A1000 microarchitecture. Rename -march=loongson3a to -march=gs464, Keep -march=loongson3a as an alias of -march=gs464 for compatibility. The patch (5) add Loongson 3A2000/3A3000 processor support. Include Loongson MMI, EXT, EXT2 instructions set. The patch (6) add Loongson 2K1000 processor support. Include Loongson MMI, EXT, EXT2 and MSA instructions set. The binutils patch has been upstreamed. There are six patches in this set, as follows. 1) 0001-MIPS-Add-support-for-loongson-mmi-instructions.patch 2) 0002-MIPS-Add-support-for-Loongson-EXT-istructions.patch 3) 0003-MIPS-Add-support-for-Loongson-EXT2-istructions.patch 4) 0004-MIPS-Add-support-for-Loongson-3A1000-proccessor.patch 5) 0005-MIPS-Add-support-for-Loongson-3A2000-3A3000-proccess.patch 6) 0006-MIPS-Add-support-for-Loongson-2K1000-proccessor.patch All patchs test under mips64el-linux-gnu no new regressions. Ok for commit ? Thanks, Paul Hua
