diff options
| -rw-r--r-- | target/mips/translate.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/target/mips/translate.c b/target/mips/translate.c index 32d1d2d..e205c3e 100644 --- a/target/mips/translate.c +++ b/target/mips/translate.c @@ -2087,8 +2087,48 @@ enum { * MTSAB rs, immediate Move Byte Count to Shift Amount Register * MTSAH rs, immediate Move Halfword Count to Shift Amount Register * PROT3W rd, rt Parallel Rotate 3 Words + * + * The TX79-specific Multimedia Instruction encodings + * ================================================== + * + * TX79 Multimedia Instruction encoding table keys: + * + * * This code is reserved for future use. An attempt to execute it + * causes a Reserved Instruction exception. + * % This code indicates an instruction class. The instruction word + * must be further decoded by examining additional tables that show + * the values for other instruction fields. + * # This code is reserved for the unsupported instructions DMULT, + * DMULTU, DDIV, DDIVU, LL, LLD, SC, SCD, LWC2 and SWC2. An attempt + * to execute it causes a Reserved Instruction exception. + * + * TX79 Multimedia Instructions encoded by opcode field (MMI, LQ, SQ): + * + * 31 26 0 + * +--------+----------------------------------------+ + * | opcode | | + * +--------+----------------------------------------+ + * + * opcode bits 28..26 + * bits | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 + * 31..29 | 000 | 001 | 010 | 011 | 100 | 101 | 110 | 111 + * -------+-------+-------+-------+-------+-------+-------+-------+------- + * 0 000 |SPECIAL| REGIMM| J | JAL | BEQ | BNE | BLEZ | BGTZ + * 1 001 | ADDI | ADDIU | SLTI | SLTIU | ANDI | ORI | XORI | LUI + * 2 010 | COP0 | COP1 | * | * | BEQL | BNEL | BLEZL | BGTZL + * 3 011 | DADDI | DADDIU| LDL | LDR | MMI% | * | LQ | SQ + * 4 100 | LB | LH | LWL | LW | LBU | LHU | LWR | LWU + * 5 101 | SB | SH | SWL | SW | SDL | SDR | SWR | CACHE + * 6 110 | # | LWC1 | # | PREF | # | LDC1 | # | LD + * 7 111 | # | SWC1 | # | * | # | SDC1 | # | SD */ +enum { + TX79_CLASS_MMI = 0x1C << 26, /* Same as OPC_SPECIAL2 */ + TX79_LQ = 0x1E << 26, /* Same as OPC_MSA */ + TX79_SQ = 0x1F << 26, /* Same as OPC_SPECIAL3 */ +}; + /* global register indices */ static TCGv cpu_gpr[32], cpu_PC; static TCGv cpu_HI[MIPS_DSP_ACC], cpu_LO[MIPS_DSP_ACC]; |