diff mbox series

[PULL,v3,38/44] disas: nanoMIPS: Comment the decoder of 'gpr1' gpr encoding type

Message ID 1546535297-11040-39-git-send-email-aleksandar.markovic@rt-rk.com (mailing list archive)
State New, archived
Headers show
Series [PULL,v3,01/44] MAINTAINERS: target/mips: Add MIPS files under default-configs directory | expand

Commit Message

Aleksandar Markovic Jan. 3, 2019, 5:08 p.m. UTC 
From: Aleksandar Markovic <amarkovic@wavecomp.com>

Comment the decoder of 'gpr1' gpr encoding type in nanoMIPS
disassembler.

Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
---
 disas/nanomips.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
diff mbox series

Patch

diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp
index 6f15821..23556b4 100644
--- a/disas/nanomips.cpp
+++ b/disas/nanomips.cpp
@@ -389,6 +389,27 @@  uint64 NMD::decode_gpr_gpr3_src_store(uint64 d)
 }
 
 
+/*
+ * NMD::decode_gpr_gpr1() - decoder for 'gpr1' gpr encoding type
+ *
+ *   Map a 1-bit code to the 5-bit register space according to this pattern:
+ *
+ *                                  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 instruction:
+ *
+ *     - MOVE.BALC
+ */
 uint64 NMD::decode_gpr_gpr1(uint64 d)
 {
     static uint64 register_list[] = {  4,  5 };