diff options
Diffstat (limited to 'gdb/pyr-opcode.h')
| -rwxr-xr-x | gdb/pyr-opcode.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/gdb/pyr-opcode.h b/gdb/pyr-opcode.h new file mode 100755 index 0000000..06632b8 --- /dev/null +++ b/gdb/pyr-opcode.h @@ -0,0 +1,287 @@ +/* pyramid.opcode.h -- gdb initial attempt. */ + +/* pyramid opcode table: wot to do with this + particular opcode */ + +struct pyr_datum +{ + char nargs; + char * args; /* how to compile said opcode */ + unsigned long mask; /* Bit vector: which operand modes are valid + for this opcode */ + unsigned char code; /* op-code (always 6(?) bits */ +}; + +typedef struct pyr_insn_format { + unsigned int mode :4; + unsigned int operator :8; + unsigned int index_scale :2; + unsigned int index_reg :6; + unsigned int operand_1 :6; + unsigned int operand_2:6; +} pyr_insn_format; + + +/* We store four bytes of opcode for all opcodes. + Pyramid is sufficiently RISCy that: + - insns are always an integral number of words; + - the length of any insn can be told from the first word of + the insn. (ie, if there are zero, one, or two words of + immediate operand/offset). + + + The args component is a string containing two characters for each + operand of the instruction. The first specifies the kind of operand; + the second, the place it is stored. */ + +/* Kinds of operands: + mask assembler syntax description + 0x0001: movw Rn,Rn register to register + 0x0002: movw K,Rn quick immediate to register + 0x0004: movw I,Rn long immediate to register + 0x0008: movw (Rn),Rn register indirect to register + movw (Rn)[x],Rn register indirect to register + 0x0010: movw I(Rn),Rn offset register indirect to register + movw I(Rn)[x],Rn offset register indirect, indexed, to register + + 0x0020: movw Rn,(Rn) register to register indirect + 0x0040: movw K,(Rn) quick immediate to register indirect + 0x0080: movw I,(Rn) long immediate to register indirect + 0x0100: movw (Rn),(Rn) register indirect to-register indirect + 0x0100: movw (Rn),(Rn) register indirect to-register indirect + 0x0200: movw I(Rn),(Rn) register indirect+offset to register indirect + 0x0200: movw I(Rn),(Rn) register indirect+offset to register indirect + + 0x0400: movw Rn,I(Rn) register to register indirect+offset + 0x0800: movw K,I(Rn) quick immediate to register indirect+offset + 0x1000: movw I,I(Rn) long immediate to register indirect+offset + 0x1000: movw (Rn),I(Rn) register indirect to-register indirect+offset + 0x1000: movw I(Rn),I(Rn) register indirect+offset to register indirect + +offset + 0x0000: (irregular) ??? + + + Each insn has a four-bit field encoding the type(s) of its operands. +*/ + +/* Some common combinations + */ + +/* the first 5,(0x1|0x2|0x4|0x8|0x10) ie (1|2|4|8|16), ie ( 32 -1)*/ +#define GEN_TO_REG (31) + +#define UNKNOWN ((unsigned long)-1) +#define ANY (GEN_TO_REG | (GEN_TO_REG << 5) | (GEN_TO_REG << 15)) + +#define CONVERT (1|8|0x10|0x20|0x200) + +#define K_TO_REG (2) +#define I_TO_REG (4) +#define NOTK_TO_REG (GEN_TO_REG & ~K_TO_REG) +#define NOTI_TO_REG (GEN_TO_REG & ~I_TO_REG) + +/* The assembler requires that this array be sorted as follows: + all instances of the same mnemonic must be consecutive. + All instances of the same mnemonic with the same number of operands + must be consecutive. + */ + +struct pyr_opcode /* pyr opcode text */ +{ + char * name; /* opcode name: lowercase string [key] */ + struct pyr_datum datum; /* rest of opcode table [datum] */ +}; + +#define pyr_how args +#define pyr_nargs nargs +#define pyr_mask mask +#define pyr_name name + +struct pyr_opcode pyr_opcodes[] = +{ + {"movb", { 2, "", UNKNOWN, 0x11}, }, + {"movh", { 2, "", UNKNOWN, 0x12} }, + {"movw", { 2, "", ANY, 0x10} }, + {"movl", { 2, "", ANY, 0x13} }, + {"mnegw", { 2, "", (0x1|0x8|0x10), 0x14} }, + {"mnegf", { 2, "", 0x1, 0x15} }, + {"mnegd", { 2, "", 0x1, 0x16} }, + {"mcomw", { 2, "", (0x1|0x8|0x10), 0x17} }, + {"mabsw", { 2, "", (0x1|0x8|0x10), 0x18} }, + {"mabsf", { 2, "", 0x1, 0x19} }, + {"mabsd", { 2, "", 0x1, 0x1a} }, + {"mtstw", { 2, "", (0x1|0x8|0x10), 0x1c} }, + {"mtstf", { 2, "", 0x1, 0x1d} }, + {"mtstd", { 2, "", 0x1, 0x1e} }, + {"mova", { 2, "", 0x8|0x10, 0x1f} }, + {"movzbw", { 2, "", (0x1|0x8|0x10), 0x20} }, + {"movzhw", { 2, "", (0x1|0x8|0x10), 0x21} }, + /* 2 insns out of order here */ + {"movbl", { 2, "", 1, 0x4f} }, + {"filbl", { 2, "", 1, 0x4e} }, + + {"cvtbw", { 2, "", CONVERT, 0x22} }, + {"cvthw", { 2, "", CONVERT, 0x23} }, + {"cvtwb", { 2, "", CONVERT, 0x24} }, + {"cvtwh", { 2, "", CONVERT, 0x25} }, + {"cvtwf", { 2, "", CONVERT, 0x26} }, + {"cvtwd", { 2, "", CONVERT, 0x27} }, + {"cvtfw", { 2, "", CONVERT, 0x28} }, + {"cvtfd", { 2, "", CONVERT, 0x29} }, + {"cvtdw", { 2, "", CONVERT, 0x2a} }, + {"cvtdf", { 2, "", CONVERT, 0x2b} }, + + {"addw", { 2, "", GEN_TO_REG, 0x40} }, + {"addwc", { 2, "", GEN_TO_REG, 0x41} }, + {"subw", { 2, "", GEN_TO_REG, 0x42} }, + {"subwb", { 2, "", GEN_TO_REG, 0x43} }, + {"rsubw", { 2, "", GEN_TO_REG, 0x44} }, + {"mulw", { 2, "", GEN_TO_REG, 0x45} }, + {"emul", { 2, "", GEN_TO_REG, 0x47} }, + {"umulw", { 2, "", GEN_TO_REG, 0x46} }, + {"divw", { 2, "", GEN_TO_REG, 0x48} }, + {"ediv", { 2, "", GEN_TO_REG, 0x4a} }, + {"rdivw", { 2, "", GEN_TO_REG, 0x4b} }, + {"udivw", { 2, "", GEN_TO_REG, 0x49} }, + {"modw", { 2, "", GEN_TO_REG, 0x4c} }, + {"umodw", { 2, "", GEN_TO_REG, 0x4d} }, + + + {"addf", { 2, "", 1, 0x50} }, + {"addd", { 2, "", 1, 0x51} }, + {"subf", { 2, "", 1, 0x52} }, + {"subd", { 2, "", 1, 0x53} }, + {"mulf", { 2, "", 1, 0x56} }, + {"muld", { 2, "", 1, 0x57} }, + {"divf", { 2, "", 1, 0x58} }, + {"divd", { 2, "", 1, 0x59} }, + + + {"cmpb", { 2, "", UNKNOWN, 0x61} }, + {"cmph", { 2, "", UNKNOWN, 0x62} }, + {"cmpw", { 2, "", UNKNOWN, 0x60} }, + {"ucmpb", { 2, "", UNKNOWN, 0x66} }, + /* WHY no "ucmph"??? */ + {"ucmpw", { 2, "", UNKNOWN, 0x65} }, + {"xchw", { 2, "", UNKNOWN, 0x0f} }, + + + {"andw", { 2, "", GEN_TO_REG, 0x30} }, + {"orw", { 2, "", GEN_TO_REG, 0x31} }, + {"xorw", { 2, "", GEN_TO_REG, 0x32} }, + {"bicw", { 2, "", GEN_TO_REG, 0x33} }, + {"lshlw", { 2, "", GEN_TO_REG, 0x38} }, + {"ashlw", { 2, "", GEN_TO_REG, 0x3a} }, + {"ashll", { 2, "", GEN_TO_REG, 0x3c} }, + {"ashrw", { 2, "", GEN_TO_REG, 0x3b} }, + {"ashrl", { 2, "", GEN_TO_REG, 0x3d} }, + {"rotlw", { 2, "", GEN_TO_REG, 0x3e} }, + {"rotrw", { 2, "", GEN_TO_REG, 0x3f} }, + + /* push and pop insns are "going away next release". */ + {"pushw", { 2, "", GEN_TO_REG, 0x0c} }, + {"popw", { 2, "", (0x1|0x8|0x10), 0x0d} }, + {"pusha", { 2, "", (0x8|0x10), 0x0e} }, + + {"bitsw", { 2, "", UNKNOWN, 0x35} }, + {"bitcw", { 2, "", UNKNOWN, 0x36} }, + /* some kind of ibra/dbra insns??*/ + {"icmpw", { 2, "", UNKNOWN, 0x67} }, + {"dcmpw", { 2, "", (1|4|0x20|0x80|0x400|0x1000), 0x69} },/*FIXME*/ + {"acmpw", { 2, "", 1, 0x6b} }, + + /* Call is written as a 1-op insn, but is always (dis)assembled as a 2-op + insn with a 2nd op of tr14. The assembler will have to grok this. */ + {"call", { 2, "", GEN_TO_REG, 0x04} }, + {"call", { 1, "", GEN_TO_REG, 0x04} }, + + {"callk", { 1, "", UNKNOWN, 0x06} },/* system call?*/ + /* Ret is usually written as a 0-op insn, but gets disassembled as a + 1-op insn. The operand is always tr15. */ + {"ret", { 0, "", UNKNOWN, 0x09} }, + {"ret", { 1, "", UNKNOWN, 0x09} }, + {"adsf", { 2, "", (1|2|4), 0x08} }, + {"retd", { 2, "", UNKNOWN, 0x0a} }, + {"btc", { 2, "", UNKNOWN, 0x01} }, + {"bfc", { 2, "", UNKNOWN, 0x02} }, + /* Careful: halt is 0x00000000. Jump must have some other (mode?)bit set?? */ + {"jump", { 1, "", UNKNOWN, 0x00} }, + {"btp", { 2, "", UNKNOWN, 0xf00} }, + /* read control-stack pointer is another 1-or-2 operand insn. */ + {"rcsp", { 2, "", UNKNOWN, 0x01f} }, + {"rcsp", { 1, "", UNKNOWN, 0x01f} } +}; + +/* end: pyramid.opcode.h */ +/* One day I will have to take the time to find out what operands + are valid for these insns, and guess at what they mean. + + I can't imagine what the "I???" insns (iglob, etc) do. + + the arithmetic-sounding insns ending in "p" sound awfully like BCD + arithmetic insns: + dshlp -> Decimal SHift Left Packed + dshrp -> Decimal SHift Right Packed + and cvtlp would be convert long to packed. + I have no idea how the operands are interpreted; but having them be + a long register with (address, length) of an in-memory packed BCD operand + would not be surprising. + They are unlikely to be a packed bcd string: 64 bits of long give + is only 15 digits+sign, which isn't enough for COBOL. + */ +#if 0 + {"wcsp", { 2, "", UNKNOWN, 0x00} }, /*write csp?*/ + /* The OSx Operating System Porting Guide claims SSL does things + with tr12 (a register reserved to it) to do with static block-structure + references. SSL=Set Static Link? It's "Going away next release". */ + {"ssl", { 2, "", UNKNOWN, 0x00} }, + {"ccmps", { 2, "", UNKNOWN, 0x00} }, + {"lcd", { 2, "", UNKNOWN, 0x00} }, + {"uemul", { 2, "", UNKNOWN, 0x00} }, /*unsigned emul*/ + {"srf", { 2, "", UNKNOWN, 0x00} }, /*Gidget time???*/ + {"mnegp", { 2, "", UNKNOWN, 0x00} }, /move-neg phys?*/ + {"ldp", { 2, "", UNKNOWN, 0x00} }, /*load phys?*/ + {"ldti", { 2, "", UNKNOWN, 0x00} }, + {"ldb", { 2, "", UNKNOWN, 0x00} }, + {"stp", { 2, "", UNKNOWN, 0x00} }, + {"stti", { 2, "", UNKNOWN, 0x00} }, + {"stb", { 2, "", UNKNOWN, 0x00} }, + {"stu", { 2, "", UNKNOWN, 0x00} }, + {"addp", { 2, "", UNKNOWN, 0x00} }, + {"subp", { 2, "", UNKNOWN, 0x00} }, + {"mulp", { 2, "", UNKNOWN, 0x00} }, + {"divp", { 2, "", UNKNOWN, 0x00} }, + {"dshlp", { 2, "", UNKNOWN, 0x00} }, /* dec shl packed? */ + {"dshrp", { 2, "", UNKNOWN, 0x00} }, /* dec shr packed? */ + {"movs", { 2, "", UNKNOWN, 0x00} }, /*move (string?)?*/ + {"cmpp", { 2, "", UNKNOWN, 0x00} }, /* cmp phys?*/ + {"cmps", { 2, "", UNKNOWN, 0x00} }, /* cmp (string?)?*/ + {"cvtlp", { 2, "", UNKNOWN, 0x00} }, /* cvt long to p??*/ + {"cvtpl", { 2, "", UNKNOWN, 0x00} }, /* cvt p to l??*/ + {"dintr", { 2, "", UNKNOWN, 0x00} }, /* ?? intr ?*/ + {"rphysw", { 2, "", UNKNOWN, 0x00} }, /* read phys word?*/ + {"wphysw", { 2, "", UNKNOWN, 0x00} }, /* write phys word?*/ + {"cmovs", { 2, "", UNKNOWN, 0x00} }, + {"rsubw", { 2, "", UNKNOWN, 0x00} }, + {"bicpsw", { 2, "", UNKNOWN, 0x00} }, /* clr bit in psw? */ + {"bispsw", { 2, "", UNKNOWN, 0x00} }, /* set bit in psw? */ + {"eio", { 2, "", UNKNOWN, 0x00} }, /* ?? ?io ? */ + {"callp", { 2, "", UNKNOWN, 0x00} }, /* call phys?*/ + {"callr", { 2, "", UNKNOWN, 0x00} }, + {"lpcxt", { 2, "", UNKNOWN, 0x00} }, /*load proc context*/ + {"rei", { 2, "", UNKNOWN, 0x00} }, /*ret from intrpt*/ + {"rport", { 2, "", UNKNOWN, 0x00} }, /*read-port?*/ + {"rtod", { 2, "", UNKNOWN, 0x00} }, /*read-time-of-day?*/ + {"ssi", { 2, "", UNKNOWN, 0x00} }, + {"vtpa", { 2, "", UNKNOWN, 0x00} }, /*virt-to-phys-addr?*/ + {"wicl", { 2, "", UNKNOWN, 0x00} }, /* write icl ? */ + {"wport", { 2, "", UNKNOWN, 0x00} }, /*write-port?*/ + {"wtod", { 2, "", UNKNOWN, 0x00} }, /*write-time-of-day?*/ + {"flic", { 2, "", UNKNOWN, 0x00} }, + {"iglob", { 2, "", UNKNOWN, 0x00} }, /* I global? */ + {"iphys", { 2, "", UNKNOWN, 0x00} }, /* I physical? */ + {"ipid", { 2, "", UNKNOWN, 0x00} }, /* I pid? */ + {"ivect", { 2, "", UNKNOWN, 0x00} }, /* I vector? */ + {"lamst", { 2, "", UNKNOWN, 0x00} }, + {"tio", { 2, "", UNKNOWN, 0x00} }, +#endif |