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| author | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-12-26 14:42:13 +0100 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2019-01-03 17:52:52 +0100 |
| commit | a21e052013bf0d9ff3736b694cf0210b4b173353 (patch) | |
| tree | 494f82a76a23c467cd5d3f8178642f90d352579e /disas | |
| parent | ce0f2617acf1586931bf4d6525311eae46017c37 (diff) | |
| download | qemu-a21e052013bf0d9ff3736b694cf0210b4b173353.zip qemu-a21e052013bf0d9ff3736b694cf0210b4b173353.tar.gz qemu-a21e052013bf0d9ff3736b694cf0210b4b173353.tar.bz2 | |
disas: nanoMIPS: Comment the decoder of 'gpr2.reg2' gpr encoding type
Comment the decoder of 'gpr2.reg2' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Diffstat (limited to 'disas')
| -rw-r--r-- | disas/nanomips.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp index 06d2400..fe0c4af 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -498,6 +498,28 @@ uint64 NMD::decode_gpr_gpr2_reg1(uint64 d) } +/* + * NMD::decode_gpr_gpr2_reg2() - decoder for 'gpr2.reg2' gpr encoding type + * + * Map a 2-bit code to the 5-bit register space according to this pattern: + * + * 3 2 1 0 + * | | | | + * | | | | + * | | | └-----------------┐ + * | | └-----------------┐ | + * | └-----------------┐ | | + * └-----------------┐ | | | + * | | | | + * | | | | + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 3 2 1 0 + * + * Used in handling following instructions: + * + * - MOVEP + * - MOVEP[REV] + */ uint64 NMD::decode_gpr_gpr2_reg2(uint64 d) { static uint64 register_list[] = { 5, 6, 7, 8 }; |