34 lines
1.2 KiB
Plaintext
34 lines
1.2 KiB
Plaintext
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## Math_Test
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A library of commonly used mathematical functions.
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**Note:** Jack compilers implement multiplication and division using OS method calls.
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### function void init() {
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Initializes the library.
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### function int abs(int x)
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Returns the absolute value of x.
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### function int multiply(int x, int y)
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Returns the product of x and y. When a Jack compiler detects the multiplication operator `"*"` in the program's code, it handles it by invoking this method. In other words, the Jack expressions x*y and multiply(x,y) return the same value.
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### function int divide(int x, int y)
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Returns the integer part of x/y. When a Jack compiler detects the multiplication operator `"/"` in the program's code, it handles it by invoking this method. In other words, the Jack expressions x/y and divide(x,y) return the same value.
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### function int sqrt(int x)
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Returns the integer part of the square root of x.
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### function int max(int a, int b)
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Returns the greater number.
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### function int min(int a, int b)
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Returns the smaller number.
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***
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## Project
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* Implement `Math.jack`
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* Test in simulation:
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```
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$ cd 00_Math_Test
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$ make
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$ cd ../00_HACK
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$ apio clean
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$ apio sim
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```
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* Compare the content of special function register DEBUG0--DEBUG4.
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