registers.py: Fix subtractions in generated C code #1099
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JanMatCodasip
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For an easier review, attached are the generated files before and after this change: |
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@en-sc Would you please have a moment for this review? Thank you. |
rtwfroody
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Feb 17, 2025
registers.py
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| negative_constant = arg.is_constant() and (arg < 0) | ||
| result += " - " if negative_constant else " + " | ||
| if negative_constant: | ||
| arg = -arg # flip to positive | ||
| result += stc(arg) |
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This seems simpler to read:
Suggested change
| negative_constant = arg.is_constant() and (arg < 0) | |
| result += " - " if negative_constant else " + " | |
| if negative_constant: | |
| arg = -arg # flip to positive | |
| result += stc(arg) | |
| if arg.is_constant() and (arg < 0): | |
| result += " - %s" % stc(-arg) | |
| else: | |
| result += " + %s" % stc(arg) |
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I agree, that is much cleaner. I have adopted the suggestion. Thanks.
The registers.py generator outputs expressions with subtractions
into the C code of debug_defines.{h,c} in this form:
```
((XLEN) + -6ULL)
```
Such code may look awkward to code readers and also triggers GCC's
-Wconversion warnings (when enabled).
Fix the generator to produce the expressions with subtraction
in a natural form:
```
((XLEN) - 6ULL)
```
JanMatCodasip
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The registers.py generator outputs expressions with subtractions into the C code of debug_defines.{h,c} in this form:
Such code may look awkward to code readers and also triggers GCC's
-Wconversionwarnings in the projects that will include these generated C files.Fix the generator to produce expressions with subtraction in a natural form: