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SPU LLVM: simplify jump table computation

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Remove one add operation and adjust constants instead.
This commit is contained in:
Nekotekina 2019-05-16 00:54:50 +03:00
parent b138d25b97
commit f95ec8a37c
1 changed files with 3 additions and 3 deletions
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6
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -7817,7 +7817,7 @@ public:
if (!op.d && !op.e && tfound != m_targets.end() && tfound->second.size() > 1) if (!op.d && !op.e && tfound != m_targets.end() && tfound->second.size() > 1)
{ {
// Shift aligned address for switch // Shift aligned address for switch
const auto addrfx = m_ir->CreateAdd(m_ir->CreateSub(addr.value, m_base_pc), m_ir->getInt32(m_base)); const auto addrfx = m_ir->CreateSub(addr.value, m_base_pc);
const auto sw_arg = m_ir->CreateLShr(addrfx, 2, "", true); const auto sw_arg = m_ir->CreateLShr(addrfx, 2, "", true);
// Initialize jump table targets // Initialize jump table targets
@ -7860,12 +7860,12 @@ public:
if (found != targets.end()) if (found != targets.end())
{ {
sw->addCase(m_ir->getInt32(pos / 4), found->second); sw->addCase(m_ir->getInt32(pos / 4 - m_base / 4), found->second);
continue; continue;
} }
} }
sw->addCase(m_ir->getInt32(pos / 4), sw->getDefaultDest()); sw->addCase(m_ir->getInt32(pos / 4 - m_base / 4), sw->getDefaultDest());
} }
// Exit function on unexpected target // Exit function on unexpected target