diff options
| author | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-12-26 14:38:15 +0100 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2019-01-03 17:52:52 +0100 |
| commit | 8e2919f66666496ae33af0caeca6f0a20faa5828 (patch) | |
| tree | 36a278ddbf887fb867d5ed3b331fa31f98b5ee08 /disas/nanomips.cpp | |
| parent | 4671783ac144c2ea75f983a743678322c5ba1227 (diff) | |
disas: nanoMIPS: Comment the decoder of 'gpr2.reg1' gpr encoding type
Comment the decoder of 'gpr2.reg1' 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/nanomips.cpp')
| -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 b0d0cf8901..c3b2bec943 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -468,6 +468,28 @@ uint64 NMD::decode_gpr_gpr4(uint64 d) } +/* + * NMD::decode_gpr_gpr2_reg1() - decoder for 'gpr2.reg1' 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_reg1(uint64 d) { static uint64 register_list[] = { 4, 5, 6, 7 }; |