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[/] [eco32/] [trunk/] [sim/] [instr.h] - Blame information for rev 157

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Line No. Rev Author Line
1 8 hellwig
/*
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 * instr.h -- instruction encoding
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 */
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#ifndef _INSTR_H_
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#define _INSTR_H_
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#define FORMAT_N        0        /* no operands */
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#define FORMAT_RH       1       /* one register and a half operand */
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#define FORMAT_RHH      2       /* one register and a half operand */
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                                /* ATTENTION: high-order 16 bits encoded */
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#define FORMAT_RRH      3       /* two registers and a half operand */
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#define FORMAT_RRS      4       /* two registers and a signed half operand */
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#define FORMAT_RRR      5       /* three register operands */
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#define FORMAT_RRX      6       /* either FORMAT_RRR or FORMAT_RRH */
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#define FORMAT_RRY      7       /* either FORMAT_RRR or FORMAT_RRS */
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#define FORMAT_RRB      8       /* two registers and a 16 bit signed
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                                   offset operand */
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#define FORMAT_J        9       /* no registers and a 26 bit signed
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                                   offset operand */
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#define FORMAT_JR       10      /* one register operand */
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#define MASK(n)         ((((Word) 1) << n) - 1)
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#define SIGN(n)         (((Word) 1) << (n - 1))
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#define ZEXT16(x)       (((Word) (x)) & MASK(16))
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#define SEXT16(x)       (((Word) (x)) & SIGN(16) ? \
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                         (((Word) (x)) | ~MASK(16)) : \
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                         (((Word) (x)) & MASK(16)))
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#define SEXT26(x)       (((Word) (x)) & SIGN(26) ? \
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                         (((Word) (x)) | ~MASK(26)) : \
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                         (((Word) (x)) & MASK(26)))
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#define OP_ADD          0x00
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#define OP_ADDI         0x01
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#define OP_SUB          0x02
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#define OP_SUBI         0x03
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#define OP_MUL          0x04
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#define OP_MULI         0x05
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#define OP_MULU         0x06
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#define OP_MULUI        0x07
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#define OP_DIV          0x08
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#define OP_DIVI         0x09
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#define OP_DIVU         0x0A
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#define OP_DIVUI        0x0B
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#define OP_REM          0x0C
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#define OP_REMI         0x0D
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#define OP_REMU         0x0E
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#define OP_REMUI        0x0F
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#define OP_AND          0x10
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#define OP_ANDI         0x11
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#define OP_OR           0x12
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#define OP_ORI          0x13
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#define OP_XOR          0x14
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#define OP_XORI         0x15
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#define OP_XNOR         0x16
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#define OP_XNORI        0x17
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#define OP_SLL          0x18
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#define OP_SLLI         0x19
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#define OP_SLR          0x1A
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#define OP_SLRI         0x1B
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#define OP_SAR          0x1C
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#define OP_SARI         0x1D
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#define OP_LDHI         0x1F
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#define OP_BEQ          0x20
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#define OP_BNE          0x21
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#define OP_BLE          0x22
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#define OP_BLEU         0x23
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#define OP_BLT          0x24
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#define OP_BLTU         0x25
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#define OP_BGE          0x26
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#define OP_BGEU         0x27
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#define OP_BGT          0x28
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#define OP_BGTU         0x29
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#define OP_J            0x2A
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#define OP_JR           0x2B
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#define OP_JAL          0x2C
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#define OP_JALR         0x2D
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#define OP_TRAP         0x2E
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#define OP_RFX          0x2F
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#define OP_LDW          0x30
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#define OP_LDH          0x31
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#define OP_LDHU         0x32
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#define OP_LDB          0x33
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#define OP_LDBU         0x34
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#define OP_STW          0x35
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#define OP_STH          0x36
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#define OP_STB          0x37
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#define OP_MVFS         0x38
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#define OP_MVTS         0x39
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#define OP_TBS          0x3A
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#define OP_TBWR         0x3B
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#define OP_TBRI         0x3C
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#define OP_TBWI         0x3D
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typedef struct {
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  char *name;
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  int format;
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  Byte opcode;
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} Instr;
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extern Instr instrTbl[];
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extern Instr *instrCodeTbl[];
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void initInstrTable(void);
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Instr *lookupInstr(char *name);
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#endif /* _INSTR_H_ */

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