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Handle tail calls.

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This commit is contained in:
Skyth
2024-09-13 21:54:59 +03:00
parent 29d1c0822c
commit 8f88bac018
1 changed files with 31 additions and 8 deletions
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37
PowerRecomp/main.cpp
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@@ -83,6 +83,22 @@ int main()
else
{
std::println(f, "\t// {:x} {} {}", base - 4, insn.opcode->name, insn.op_str);
auto printConditionalBranch = [&](bool not_, const std::string_view& cond)
{
if (insn.operands[1] < fn.base || insn.operands[1] >= fn.base + fn.size)
{
std::println(f, "\tif ({}ctx.cr{}.{}) {{", not_ ? "!" : "", insn.operands[0], cond);
std::println(f, "\t\tctx.fn[0x{:X}](ctx, base);", insn.operands[1] / 4);
std::println(f, "\t\treturn;");
std::println(f, "\t}}");
}
else
{
std::println(f, "\tif ({}ctx.cr{}.{}) goto loc_{:X};", not_ ? "!" : "", insn.operands[0], cond, insn.operands[1]);
}
};
switch (insn.opcode->id)
{
case PPC_INST_ADD:
@@ -140,8 +156,15 @@ int main()
break;
case PPC_INST_B:
// TODO: tail calls
if (insn.operands[0] < fn.base || insn.operands[0] >= fn.base + fn.size)
{
std::println(f, "\tctx.fn[0x{:X}](ctx, base);", insn.operands[0] / 4);
std::println(f, "\treturn;");
}
else
{
std::println(f, "\tgoto loc_{:X};", insn.operands[0]);
}
break;
case PPC_INST_BCTR:
@@ -156,7 +179,7 @@ int main()
break;
case PPC_INST_BEQ:
std::println(f, "\tif (ctx.cr{}.eq) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(false, "eq");
break;
case PPC_INST_BEQLR:
@@ -164,7 +187,7 @@ int main()
break;
case PPC_INST_BGE:
std::println(f, "\tif (!ctx.cr{}.lt) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(true, "lt");
break;
case PPC_INST_BGELR:
@@ -172,7 +195,7 @@ int main()
break;
case PPC_INST_BGT:
std::println(f, "\tif (ctx.cr{}.gt) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(false, "gt");
break;
case PPC_INST_BGTLR:
@@ -185,7 +208,7 @@ int main()
break;
case PPC_INST_BLE:
std::println(f, "\tif (!ctx.cr{}.gt) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(true, "gt");
break;
case PPC_INST_BLELR:
@@ -200,7 +223,7 @@ int main()
break;
case PPC_INST_BLT:
std::println(f, "\tif (ctx.cr{}.lt) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(false, "lt");
break;
case PPC_INST_BLTLR:
@@ -208,7 +231,7 @@ int main()
break;
case PPC_INST_BNE:
std::println(f, "\tif (!ctx.cr{}.eq) goto loc_{:X};", insn.operands[0], insn.operands[1]);
printConditionalBranch(true, "eq");
break;
case PPC_INST_BNECTR: