Xlat instruction -878-

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14 Nov 2014 90, Week 8-C R. Eckert TABLE LOOKUP The 80x86 instruction set includes an instruction that allows us to perform table lookup. The instruction is XLAT, and it 29 Nov 2017 If you know C, then it works like this: const uint8_t table[256] = { some byte constants (table data) }; const uint8_t* ds_bx = table; uint8_t al XLAT/XLATB - Translate Usage: XLAT translation-table XLATB (masm 5.x) Modifies flags: None Replaces the byte in AL with byte from a user table addressed The XLAT and XLATB instructions get the base address of the table in memory from either the DS:EBX or the DS:BX registers (depending on the address-size The XLAT and XLATB instructions get the base address of the table in memory from either the DS:EBX or the DS:BX registers (depending on the address-size The syntax of the XLAT instruction is: XLAT. or. XLAT TranslationTableName. where TranslationTable is an unsigned byte array of maximum size 256. Reference Manual > Chapter 2 Instruction-Set Mapping > String Instructions > Look-Up Translation Table (xlat). IA-32 Assembly Language Reference Manual. What is XLAT ? XLAT is a Least Squares (LSQ) program for the precise refinement of cell constants. XLAT is supplemented by a utility program named XUTIL.Opcode, Instruction, Op/En, 64-Bit Mode, Compat/Leg Mode, Description. D7, XLAT m8, ZO, Valid, Valid, Set AL to memory byte DS:[(E)BX + unsigned AL].