Transcription of Machine Code -and- How the Assembler Works
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Machine Code -and- How the Assembler Works
Machine code -and- How the Assembler WorksMar 8 13, 20131 / 32 OutlineWhat is Machine code ?RISC vs. CISCMIPS instruction formatsAssembling basic instructionsR-type instructionsI-type instructionsJ-type instructionsMacro instructions2 / 32 Assembly language vs. Machine codeAssemblertranslates assembly code to Machine codeloop: lw $t3, 0($t0) lw $t4, 4($t0) add $t2, $t3, $t4 sw $t2, 8($t0) addi $t0, $t0, 4 addi $t1, $t1, -1 bgtz $t1, loop0x8d0b00000x8d0c00040x016c50200xad0a 00080x210800040x2129ffff0x1d20fff9 AssemblerAssembly program (text file)source codeMachine code (binary)object code3 / 32 What is Machine code ? Machine code is theinterfacebetween software and hardwareThe processor is hardwired to implement Machine code the bits of a Machine instruction aredirect inputsto thecomponents of the processorThis is only true for RISC architectures!
What is machine code? Machine code is the interface between software and hardware The processor is “hardwired” to implement machine code the bits of a machine instruction are direct inputs to the components of the processor This is only true for RISC architectures! 4/32
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