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Kartik K. Agaram 2021-10-26 22:04:26 -07:00
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mu.md
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@ -331,7 +331,7 @@ Negate:
negate var negate var
``` ```
### Floating-point arithmetic ### Fractional arithmetic
Operations on `float` variables include a few we've seen before and some new Operations on `float` variables include a few we've seen before and some new
ones. Notice here that we mostly use floating-point registers `xmm_`, but ones. Notice here that we mostly use floating-point registers `xmm_`, but

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tutorial/index.md
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@ -283,7 +283,7 @@ var x/edx: int <- copy 0
Run `translate` (or `translate_emulated`) as usual. Use your runbook from Task Run `translate` (or `translate_emulated`) as usual. Use your runbook from Task
6 to address the errors that arise. 6 to address the errors that arise.
## Task 8: floating point ## Task 8: fractional numbers
All our variables so far have had type `int` (integer), but there are limits All our variables so far have had type `int` (integer), but there are limits
to what you can do with just whole integers. For example, here's the formula to what you can do with just whole integers. For example, here's the formula
@ -297,7 +297,7 @@ distance * 1.609
Write a function to perform this conversion. Some starting points: Write a function to perform this conversion. Some starting points:
* Reread [the section on variables and registers](https://github.com/akkartik/mu/blob/main/mu.md#variables-registers-and-memory) * Reread [the section on variables and registers](https://github.com/akkartik/mu/blob/main/mu.md#variables-registers-and-memory)
with special attention to the `float` type. with special attention to the `float` type.
* Read [the section on floating-point arithmetic](https://github.com/akkartik/mu/blob/main/mu.md#floating-point-arithmetic). * Read [the section on fractional arithmetic](https://github.com/akkartik/mu/blob/main/mu.md#fractional-arithmetic).
* One wrinkle is that the x86 instruction set doesn't permit literal * One wrinkle is that the x86 instruction set doesn't permit literal
fractional arguments. So you'll need to _create_ 1.609 somehow. See the fractional arguments. So you'll need to _create_ 1.609 somehow. See the
section on moving values around under [operations on simple types](https://github.com/akkartik/mu/blob/main/mu.md#operations-on-simple-types). section on moving values around under [operations on simple types](https://github.com/akkartik/mu/blob/main/mu.md#operations-on-simple-types).