This patch series adds support for emulation of CRC32 instructions for the Mips target in QEMU, skips NaN mode check for soft-float, adds a CLI flag for enabling an MSA feature, and enables the MSA for MIPS64R2-generic.
There aren't tests for these improvements. The patch 1/8 "Add CP0 MemoryMapID register implementation" from v2 has been dropped from v3 since it has been accepted and integrated into the master branch. The patch 3/8 "GTM19-448: Fix script to work without realpath" from v2 will be sent separately as it is a fix to a general bug and is intended for other maintainers. The patch 5/8 "Add micromips to P5600" from v2 has been dropped from v3 since the latest document for P5600 with eventually updated field CP0_Config3_ISA that would support microMIPS hasn't been found. The patch 6/8 "Revert use of clock_gettime for benchmarking" from v2 has been dropped from v3 because it seems that clock_gettime and CLOCK_MONOTONIC exist in MinGW headers and that QEMU builds with MinGW. The patch 7/8 "target/mips: Enable MSA ASE for mips32r6-generic" from v2 has been dropped from v3 since it has been accepted and integrated into the master branch. When it comes to the patch 8/8 "target/mips: Enable MSA ASE for mips64R2-generic" from v2, the cpu Loongson-3A4000 supports both mips64r2 and the MSA, so I'm not sure whether to drop this patch. Regarding the DSPRAM for I6500, I heard that the IP for the DSPRAM for mips64r6 hasn't been published, but in the document "MIPS64® I6500 Multiprocessing System Programmer’s Guide" the DSPRAM is elaborated, so I don't know whether to add support for the DSPRAM. Most of the following patches are cherry-picked from the branch mips_rel/4_1_0/master on the MIPS' repository: https://github.com/MIPS/gnutools-qemu/ Further details on individual changes are included in the respective patches. An instance of a pipeline of QEMU CI jobs run with input variable QEMU_CI=1 for this patch series is available here: https://gitlab.com/rakicaleksandar1999/qemu/-/pipelines/1533819034 and for the master branch is available here: https://gitlab.com/rakicaleksandar1999/qemu/-/pipelines/1533465414 We are open for a discussion.
