From d132c79f6b68622e8a115327d1f60176e1816c7c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E9=99=B3=E9=9F=8B=E4=BB=BB=20=28Wei-Ren=20Chen=29?= Date: Wed, 21 Nov 2012 13:50:45 +0800 Subject: target-mips: Add comments on POOL32Axf encoding Current QEMU MIPS POOL32AXF encoding comes from microMIPS32 and microMIPS32 DSP. Add comment here to help reading. Signed-off-by: Chen Wei-Ren Reviewed-by: Eric Johnson Signed-off-by: Aurelien Jarno --- target-mips/translate.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/target-mips/translate.c b/target-mips/translate.c index 8b438f8..7a85d21 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, -- cgit v1.1