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Basic check on instruction relocation

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This commit is contained in:
disinvite 2024-04-14 13:32:37 -04:00
parent a9a137ff66
commit 719d1585fa
1 changed files with 15 additions and 3 deletions
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18
tools/isledecomp/isledecomp/compare/asm/fixes.py
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@ -124,6 +124,10 @@ def effective_match_possible(orig_asm: List[str], recomp_asm: List[str]) -> bool
return True
def find_regs_used(inst: str) -> List[str]:
return REG_FIND.findall(inst)
def find_regs_changed(a: str, b: str) -> List[Tuple[str, str]]:
"""For instructions a, b, return the pairs of registers that were used.
This is not a very precise way to compare the instructions, so it depends
@ -192,14 +196,22 @@ def relocate_instructions(
for j in inserts:
line = recomp_asm[j]
recomp_regs_used = set(find_regs_used(line))
for i in deletes:
# Check for exact match.
# TODO: This will grab the first instruction that matches.
# We should probably use the nearest index instead, if it matters
if orig_asm[i] == line:
relocated.add(j)
deletes.remove(i)
break
# To account for a move in either direction
reloc_start = min(i, j)
reloc_end = max(i, j)
if all(
recomp_regs_used.isdisjoint(set(find_regs_used(orig_asm[k])))
for k in range(reloc_start + 1, reloc_end)
):
relocated.add(j)
deletes.remove(i)
break
return relocated