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Make boolean variables be only bottom byte of %rax (%al)

This commit is contained in:
Bananymous 2024-04-29 22:23:57 +03:00
parent 8bd65f4c05
commit c37e48e8b2
1 changed files with 2 additions and 4 deletions
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6
04_semantics_and_running/main.py
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@ -780,11 +780,9 @@ def compile_ast(node: ASTnode, compile_data: CompileData) -> None:
elif node.value == '<':
compile_data.code.append(Instruction('cmpq', [register, '%rax']))
compile_data.code.append(Instruction('setl', ['%al']))
compile_data.code.append(Instruction('movzbq', ['%al', '%rax']))
elif node.value == '=':
compile_data.code.append(Instruction('cmpq', [register, '%rax']))
compile_data.code.append(Instruction('sete', ['%al']))
compile_data.code.append(Instruction('movzbq', ['%al', '%rax']))
else: assert False
# If both operands are dates, divide result by number of seconds in a day
@ -841,7 +839,7 @@ def compile_ast(node: ASTnode, compile_data: CompileData) -> None:
# compile condition
compile_ast(node.child_condition, compile_data)
compile_data.code.append(Instruction('testq', ['%rax', '%rax']))
compile_data.code.append(Instruction('testb', ['%al', '%al']))
compile_data.code.append(Instruction('jz', [label_loop]))
case 'do_unless' | 'unless_expression':
label_true = compile_data.get_label()
@ -849,7 +847,7 @@ def compile_ast(node: ASTnode, compile_data: CompileData) -> None:
# compile condition
compile_ast(node.child_condition, compile_data)
compile_data.code.append(Instruction('testq', ['%rax', '%rax']))
compile_data.code.append(Instruction('testb', ['%al', '%al']))
compile_data.code.append(Instruction('jnz', [label_true]))
# compile false statements