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Add support for WREG OPASSIGN WREG #764

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merged 1 commit into from
Oct 28, 2024
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@Alan-Jowett Alan-Jowett commented Oct 28, 2024

This pull request includes a change to the parse_instruction function in the src/asm_parse.cpp file to correct the parsing of a specific instruction format.

Parsing correction:

  • src/asm_parse.cpp: Modified the regular expression in the parse_instruction function to correctly match the WREG OPASSIGN WREG pattern instead of the incorrect WREG OPASSIGN REG pattern.

Summary by CodeRabbit

  • New Features

    • Improved parsing for assembly instructions involving wide registers, ensuring accurate matches for assignments between wide registers.
  • Bug Fixes

    • Enhanced the regex pattern for better accuracy in instruction parsing without altering existing error handling.

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coderabbitai bot commented Oct 28, 2024

Walkthrough

The changes involve a modification to the regex pattern in the src/asm_parse.cpp file, specifically altering the second operand in the assignment matching logic from REG to WREG. This adjustment ensures that the parser recognizes assignments where both operands are wide registers. The overall structure and control flow of the parse_instruction function remain unchanged, with no new error cases introduced.

Changes

File Change Summary
src/asm_parse.cpp Modified regex pattern to match assignments involving wide registers by changing REG to WREG.

Possibly related PRs

Suggested reviewers

  • dthaler

Poem

In the land of code where rabbits play,
A regex change brightens the day.
Wide registers now dance in line,
Parsing instructions, oh so fine!
With each new match, our joy will grow,
Hopping through logic, in a seamless flow! 🐇✨


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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: ASSERTIVE

📥 Commits

Files that changed from the base of the PR and between 16e06cf and 81d3920.

📒 Files selected for processing (1)
  • src/asm_parse.cpp (1 hunks)
🔇 Additional comments (1)
src/asm_parse.cpp (1)

157-157: LGTM! Verify existing instruction patterns.

The change correctly enforces that both operands must be wide registers (w or r prefix), which aligns with the expected instruction format.

Let's verify existing instruction patterns in the codebase:

✅ Verification successful

Change is safe and consistent with existing patterns

Based on the verification results:

  1. The regex pattern change from WREG OPASSIGN REG to WREG OPASSIGN WREG is consistent with the codebase's usage.
  2. All test files in test-data/ show register assignments using the same register type (r-to-r or w-to-w), confirming this is the expected behavior.
  3. The pattern is used in src/asm_parse.cpp alongside other patterns that correctly handle register width requirements.
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Search for instruction patterns that might be affected by the WREG OPASSIGN REG to WREG OPASSIGN WREG change

# Test 1: Look for test files containing instruction patterns
echo "Searching for test files with instruction patterns:"
rg -l "WREG.*OPASSIGN.*REG" "test/"

# Test 2: Look for actual instruction examples in test files
echo -e "\nSearching for actual instruction examples:"
rg -A 2 "r\d+\s*=\s*[rw]\d+" "test/"

Length of output: 378


Script:

#!/bin/bash
# Let's try a different approach to find test files and instruction patterns

# First, find all test-related files in the repository
echo "Finding test files in the repository:"
fd -t f "test" .

# Look for any files containing instruction patterns or register assignments
echo -e "\nSearching for instruction patterns in all files:"
rg -l "r\d+\s*=\s*[rw]\d+" .

# Look for actual regex pattern usage
echo -e "\nSearching for WREG and REG pattern usage:"
rg "WREG|REG" .

# Look for actual instruction examples
echo -e "\nSearching for register assignment examples:"
rg -A 2 "[rw]\d+\s*=\s*[rw]\d+" .

Length of output: 10689

src/asm_parse.cpp Show resolved Hide resolved
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Coverage Status

coverage: 90.473%. remained the same
when pulling 81d3920 on Alan-Jowett:issue761
into 16e06cf on vbpf:main.

@elazarg elazarg merged commit defa790 into vbpf:main Oct 28, 2024
19 checks passed
@Alan-Jowett Alan-Jowett deleted the issue761 branch October 29, 2024 17:05
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3 participants