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authorAleksandar Markovic <amarkovic@wavecomp.com>2018-12-26 18:41:23 +0100
committerAleksandar Markovic <amarkovic@wavecomp.com>2019-01-03 17:52:52 +0100
commitdffcf177dcfb789118f4eb519e088435d62ae42d (patch)
tree1a84fc996edbfb50a6976439531e8da6e0b3c02e /disas
parent68d80fd58f374ed077f343e1397239717fea262e (diff)
disas: nanoMIPS: Comment the decoder of 'gpr1' gpr encoding type
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>
Diffstat (limited to 'disas')
-rw-r--r--disas/nanomips.cpp21
1 files changed, 21 insertions, 0 deletions
diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp
index 6f15821403..23556b4fc6 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 };