From: Aleksandar Markovic <amarko...@wavecomp.com>
Comment the decoder of 'gpr2.reg2' gpr encoding type in nanoMIPS
disassembler.
Reviewed-by: Aleksandar Rikalo <arik...@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarko...@wavecomp.com>
---
disas/nanomips.cpp | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
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 };
--
2.7.4
