85248a4b18
This function returning a &'static str is more primitive that the Display implementation. It allows the opcode strings to be reused by the parser.
50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
"""
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Generate sources with instruction info.
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"""
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import srcgen
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def collect_instr_groups(targets):
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seen = set()
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groups = []
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for t in targets:
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for g in t.instruction_groups:
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if g not in seen:
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groups.append(g)
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seen.add(g)
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return groups
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def gen_opcodes(groups, out_dir):
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"""Generate opcode enumerations."""
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fmt = srcgen.Formatter()
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fmt.doc_comment('An instruction opcode.')
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fmt.doc_comment('')
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fmt.doc_comment('All instructions from all supported targets are present.')
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fmt.line('#[derive(Copy, Clone, PartialEq, Eq, Debug)]')
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instrs = []
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with fmt.indented('pub enum Opcode {', '}'):
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for g in groups:
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for i in g.instructions:
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instrs.append(i)
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# Build a doc comment.
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prefix = ', '.join(o.name for o in i.outs)
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if prefix:
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prefix = prefix + ' = '
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suffix = ', '.join(o.name for o in i.ins)
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fmt.doc_comment('`{}{} {}`.'.format(prefix, i.name, suffix))
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# Enum variant itself.
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fmt.line(i.camel_name + ',')
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# Generate a private opcode_name function.
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with fmt.indented('fn opcode_name(opc: Opcode) -> &\'static str {', '}'):
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with fmt.indented('match opc {', '}'):
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for i in instrs:
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fmt.format('Opcode::{} => "{}",', i.camel_name, i.name)
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fmt.update_file('opcodes.rs', out_dir)
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def generate(targets, out_dir):
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groups = collect_instr_groups(targets)
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gen_opcodes(groups, out_dir)
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