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Assembler (assembly language)

Assembler (assembly language). MASM (Microsoft’s Assembler). What’s a compiler? What’s an assembler?. Representing numbers (ints). Fixed, finite number of bits. bits bytes C/C++ Intel Sun 8 1 char [s]byte byte 16 2 short [s]word half 32 4 int or long [s]dword word

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Assembler (assembly language)

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  1. Assembler (assembly language)

  2. MASM (Microsoft’s Assembler) • What’s a compiler? • What’s an assembler?

  3. Representing numbers (ints) • Fixed, finite number of bits. bits bytes C/C++ Intel Sun 8 1 char [s]byte byte 16 2 short [s]word half 32 4 int or long [s]dword word 64 8 long long [s]qword xword

  4. MASM (Microsoft’s Assembler) • Defining data in MASM: [label] <tab> type <tab> val1[,…,valn] <tab> [;comment] For unsigned int data, type may be byte, word, or dword. For signed int data, type may be sbyte, sword, sdword.

  5. MASM (Microsoft’s Assembler) [label] <tab> type <tab> val1[,…,valn] <tab> [;comment] .data ;begin data section count dword 0 ;counter - init to 0 tbl byte 1, 2, 4, 8, 16, 32, 64, 128 ;power-of-2 table . . . .code ;begin code section . . .

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