From Code To Hardware 1
From Code To Hardware
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From Code to Hardware: Understanding the Mapping of Code to Hardware Components and ALUs, Slides of Assembly Language Programming
An in-depth look at the process of converting code into hardware, focusing on the role of multiplexors and alus. It explains how a 14-bit code representation is used to control multiplexors, which can select one of 32 input voltages and send it to an output. The document also covers the structure and functionality of various alus, from simple 1-bit alus that perform and, or, and addition operations, to more complex 32-bit alus. Students will gain a better understanding of the hardware components involved in the conversion process.
Typology: Slides
2011/2012
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From Code To Hardware
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From Code To Hardware
From Code To Hardware
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The Plan
•^ We start with code. •^ From that code we get a 32-bit equivalent binaryrepresentation. •^ The binary maps what the hardware looks like. •^ The hardware reads each of those fields. •^ The hardware performs an operation.
From Code To Hardware
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From that code we get a 14-bitEquivalent Binary Representation. 19 05D3^3023
movlw^ low^ u
20 05D4^1283
bcf^ 3,
21 05D5^1303
bcf^ 3,6^ ;carry
unused
22 05D6^ 00A^
movwf^ ?_printf
23 05D7^3000
movlw^ high^ u
24 05D8^ 00A^
movwf^ ?_printf+
25 05D9^ 25D^
call^ _printf
27 05DA^0183
clrf^33 0
3 11 0000 0011
(^0011) C 0 511100 00 00110011 docsity.com
From Code To Hardware
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What the hardware looks like.Multiplexors SelectorInput bits^0 Output 31
SelectorOutputs Input
The 5 selector wires can choose one ofthe 32 inputs voltages and send it tothe output.
The 5 selector wires choose which of the32 outputs will get the input voltage.
From Code To Hardware
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What the hardware looks like.ALUOn this and the next few pages,we look at increasinglycomplicated forms of ALU.These pictures are taken fromFigs 4.14, 4.17, 4.18, & 4.19 inthe text.
A 1-bit ALU that performs AND, OR,and ADDITION.
From Code To Hardware
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What the hardware looks like.ALU – Continued^ A 1-bit ALU that performs AND, OR, and ADDITION.
The possible inputs are a, b, and b
Causes set onLess operation.
From Code To Hardware
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What the hardware looks like.
ALU – Continued
4 m 32 B^32 S^ ALU 32 A ovfc
From Code To Hardware
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What the hardware looks like.Registers R0 R8 R
MUXToALU MUXFromALU
ALU MUXToALU
Op A^ B Out
Select^ 5 wires
6 wires
c ovf
From Code To Hardware
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The hardware reads each of those fields.Registers R0 R8 R
MUXToALU MUXFromALU
ALU MUXToALU
Out 000000 01001
01010 01000
00000
100000 0 9
10 8
(^0 32) A^ B