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decode: Store operand size logarithmic

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This commit is contained in:
Alexis Engelke
2022-11-25 13:17:40 +01:00
parent 1291603246
commit b817713ae8
2 changed files with 22 additions and 21 deletions
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6
fadec.h
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@@ -177,10 +177,10 @@ const char* fdi_name(FdInstrType ty);
/** Gets the specified segment override, or FD_REG_NONE for default segment. **/
#define FD_SEGMENT(instr) ((FdReg) (instr)->segment)
/** Gets the address size attribute of the instruction in bytes. **/
#define FD_ADDRSIZE(instr) ((instr)->addrsz)
#define FD_ADDRSIZE(instr) (1 << (instr)->addrsz)
/** Gets the operation width in bytes of the instruction if this is not encoded
* in the operands, for example for the string instruction (e.g. MOVS). **/
#define FD_OPSIZE(instr) ((instr)->operandsz)
#define FD_OPSIZE(instr) (1 << (instr)->operandsz)
/** Indicates whether the instruction was encoded with a REP prefix. Needed for:
* (1) Handling the instructions MOVS, STOS, LODS, INS and OUTS properly.
* (2) Handling the instructions SCAS and CMPS, for which this means REPZ. **/
@@ -201,7 +201,7 @@ const char* fdi_name(FdInstrType ty);
* actually needed operand size (that is, an instruction may/must only use
* a smaller part than specified here). The real operand size is always
* fully recoverable in combination with the instruction type. **/
#define FD_OP_SIZE(instr,idx) ((instr)->operands[idx].size)
#define FD_OP_SIZE(instr,idx) (1 << (instr)->operands[idx].size >> 1)
/** Gets the accessed register index of a register operand. Note that /only/ the
* index is returned, no further interpretation of the index (which depends on
* the instruction type) is done. The register type can be fetched using