> > From: Fredrik Noring <nor...@nocrew.org> > Subject: [PATCH v2 4/6] target/mips: Fix decoding mechanism of special R5900 > opcodes > > MOVN, MOVZ, MFHI, MFLO, MTHI, MTLO, MULT, MULTU, DIV, DIVU, DMULT, > DMULTU, DDIV, DDIVU and JR are decoded in decode_opc_special_tx79 > instead of the generic decode_opc_special_legacy. > > Signed-off-by: Fredrik Noring <nor...@nocrew.org> > --- > target/mips/translate.c | 54 ++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 50 insertions(+), 4 deletions(-) >
> +#if defined(TARGET_MIPS64) > + case OPC_DMULT: > + case OPC_DMULTU: > + case OPC_DDIV: > + case OPC_DDIVU: > + check_insn_opc_user_only(ctx, INSN_R5900); > + gen_muldiv(ctx, op1, 0, rs, rt); > + break; > +#endif Fredrik, do you know by any chance if a document exists that would justify inclusion of non-R5900 DMULT, DMULTU, DDIV, DDIVU in R5900 executables by gcc for R5900? Is it included by cross-gcc or by native gcc, or by both? I think gcc folks must have had a good reason for that, some kind of design - it can't be 'I really like/miss this instruction, let's include it...' Thanks, Aleksandar
