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Added support for until, the inverse of while.

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This commit is contained in:
Daniel Ellison 2016-10-26 09:24:01 -04:00
parent f9946ec029
commit 7ac53f5305
1 changed files with 3 additions and 2 deletions
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5
liblll/CodeFragment.cpp
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@ -472,14 +472,15 @@ void CodeFragment::constructOperation(sp::utree const& _t, CompilerState& _s)
m_asm << end.tag(); m_asm << end.tag();
m_asm.donePaths(); m_asm.donePaths();
} }
else if (us == "WHILE") else if (us == "WHILE" || us == "UNTIL")
{ {
requireSize(2); requireSize(2);
requireDeposit(0, 1); requireDeposit(0, 1);
auto begin = m_asm.append(); auto begin = m_asm.append();
m_asm.append(code[0].m_asm); m_asm.append(code[0].m_asm);
m_asm.append(Instruction::ISZERO); if (us == "WHILE")
m_asm.append(Instruction::ISZERO);
auto end = m_asm.appendJumpI(); auto end = m_asm.appendJumpI();
m_asm.append(code[1].m_asm, 0); m_asm.append(code[1].m_asm, 0);
m_asm.appendJump(begin); m_asm.appendJump(begin);