[Qemu-trivial] [PATCH] target-mips: Add comments on POOL32Axf encoding

[Wei-Ren Chen]

Hi all,

  Current QEMU MIPS POOL32AXF encoding comes from microMIPS32
and microMIPS32 DSP. Add comment here to help reading.

  Please review, thanks.

Regards,
chenwj

Signed-off-by: Chen Wei-Ren <address@hidden>
---
 target-mips/translate.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/target-mips/translate.c b/target-mips/translate.c
index 01b48fa..9d4b2c3 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -10359,6 +10359,19 @@ enum {
 
 /* POOL32AXF encoding of minor opcode field extension */
 
+/*
+ *  1. MIPS Architecture for Programmers Volume II-B:
+ *       The microMIPS32 Instruction Set (Revision 3.05)
+ *
+ *     Table 6.5 POOL32Axf Encoding of Minor Opcode Extension Field  
+ *
+ *  2. MIPS Architecture for Programmers VolumeIV-e:
+ *       The MIPS DSP Application-Specific Extension
+ *         to the microMIPS32 Architecture (Revision 2.34)
+ *
+ *     Table 5.5 POOL32Axf Encoding of Minor Opcode Extension Field
+ */
+
 enum {
     /* bits 11..6 */
     TEQ = 0x00,
@@ -10371,6 +10384,8 @@ enum {
     MFC0 = 0x03,
     MTC0 = 0x0b,
 
+    /* begin of microMIPS32 DSP */
+
     /* bits 13..12 for 0x01 */
     MFHI_ACC = 0x0,
     MFLO_ACC = 0x1,
@@ -10387,6 +10402,8 @@ enum {
     MULT_ACC = 0x0,
     MULTU_ACC = 0x1,
 
+    /* end of microMIPS32 DSP */
+
     /* bits 15..12 for 0x2c */
     SEB = 0x2,
     SEH = 0x3,
-- 
1.7.3.4