> -----Original Message----- > From: 陳韋任 (Wei-Ren Chen) [mailto:che...@iis.sinica.edu.tw] > Sent: Tuesday, November 20, 2012 10:05 PM > To: qemu-devel@nongnu.org > Cc: Johnson, Eric; Aurelien Jarno; Jia Liu > Subject: [PATCH v3] target-mips: Clean up microMIPS32 major opcode > > I check MIPS microMIPS manual [1], and found the major opcode might > be wrong. I add a comment to explicitly indicate what manual I am refering > to, and according that manual I remove microMIPS32 major opcodes 0x1f. > As for others, like 0x16, 0x17, 0x36 and 0x37, they are for higher-order > MIPS ISA level or new revision of this microMIPS architecture. Quote > from Johnson, they are belong MIPS64 [2]. > > [1] http://www.mips.com/products/architectures/micromips/#specifications > > MIPS Architecture for Programmers Volume II-B: > The microMIPS32 Instruction Set (Revision 3.05) > > MD00582-2B-microMIPS-AFP-03.05.pdf > > [2] http://www.mips.com/products/architectures/mips64/ > > MIPS Architecture For Programmers > Volume II-A: The MIPS64 Instruction Set > > MD00087-2B-MIPS64BIS-AFP-03.51.pdf > > Signed-off-by: Chen Wei-Ren <che...@iis.sinica.edu.tw> > --- > > v3: Correct commit message formatting. > > v2: Remove POOL48A only. The other three opcode are belong MIPS64. > > target-mips/translate.c | 24 +++++++++++++++++------- > 1 file changed, 17 insertions(+), 7 deletions(-) > > diff --git a/target-mips/translate.c b/target-mips/translate.c > index 8b438f8..7fe8d83 100644 > --- a/target-mips/translate.c > +++ b/target-mips/translate.c > @@ -10239,9 +10239,19 @@ static int decode_mips16_opc (CPUMIPSState *env, > DisasContext *ctx, > return n_bytes; > } > > -/* microMIPS extension to MIPS32 */ > +/* microMIPS extension to MIPS32/MIPS64 */ > > -/* microMIPS32 major opcodes */ > +/* > + * microMIPS32/microMIPS64 major opcodes > + * > + * 1. MIPS Architecture for Programmers Volume II-B: > + * The microMIPS32 Instruction Set (Revision 3.05) > + * > + * Table 6.2 microMIPS32 Encoding of Major Opcode Field > + * > + * 2. MIPS Architecture For Programmers Volume II-A: > + * The MIPS64 Instruction Set (Revision 3.51) > + */ > > enum { > POOL32A = 0x00, > @@ -10268,9 +10278,10 @@ enum { > POOL16D = 0x13, > ORI32 = 0x14, > POOL32F = 0x15, > - POOL32S = 0x16, > - DADDIU32 = 0x17, > + POOL32S = 0x16, /* MIPS64 */ > + DADDIU32 = 0x17, /* MIPS64 */ > > + /* 0x1f is reserved */ > POOL32C = 0x18, > LWGP16 = 0x19, > LW16 = 0x1a, > @@ -10278,7 +10289,6 @@ enum { > XORI32 = 0x1c, > JALS32 = 0x1d, > ADDIUPC = 0x1e, > - POOL48A = 0x1f, > > /* 0x20 is reserved */ > RES_20 = 0x20, > @@ -10307,8 +10317,8 @@ enum { > B16 = 0x33, > ANDI32 = 0x34, > J32 = 0x35, > - SD32 = 0x36, > - LD32 = 0x37, > + SD32 = 0x36, /* MIPS64 */ > + LD32 = 0x37, /* MIPS64 */ > > /* 0x38 and 0x39 are reserved */ > RES_38 = 0x38, > -- > 1.7.12.3
Reviewed-by: Eric Johnson <er...@mips.com>
