From d592ed6dafbb134553bf3a0b8ee70ff7f2049aba Mon Sep 17 00:00:00 2001
From: Mark Rowe <mark@vector35.com>
Date: Wed, 3 Jun 2026 21:25:55 -0700
Subject: Add bswap, popcnt, clz, ctz, cls, and rbit instructions

---
 lowlevelilinstruction.cpp | 54 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)

(limited to 'lowlevelilinstruction.cpp')

diff --git a/lowlevelilinstruction.cpp b/lowlevelilinstruction.cpp
index 228e8328..5a100080 100644
--- a/lowlevelilinstruction.cpp
+++ b/lowlevelilinstruction.cpp
@@ -332,6 +332,12 @@ static constexpr std::array s_instructionOperandUsage = {
 	OperandUsage{LLIL_REG_STACK_PHI, {DestSSARegisterStackLowLevelOperandUsage, SourceSSARegisterStacksLowLevelOperandUsage}},
 	OperandUsage{LLIL_FLAG_PHI, {DestSSAFlagLowLevelOperandUsage, SourceSSAFlagsLowLevelOperandUsage}},
 	OperandUsage{LLIL_MEM_PHI, {DestMemoryVersionLowLevelOperandUsage, SourceMemoryVersionsLowLevelOperandUsage}},
+	OperandUsage{LLIL_BSWAP, {SourceExprLowLevelOperandUsage}},
+	OperandUsage{LLIL_POPCNT, {SourceExprLowLevelOperandUsage}},
+	OperandUsage{LLIL_CLZ, {SourceExprLowLevelOperandUsage}},
+	OperandUsage{LLIL_CTZ, {SourceExprLowLevelOperandUsage}},
+	OperandUsage{LLIL_RBIT, {SourceExprLowLevelOperandUsage}},
+	OperandUsage{LLIL_CLS, {SourceExprLowLevelOperandUsage}},
 };
 
 
@@ -1984,6 +1990,12 @@ void LowLevelILInstruction::VisitExprs(bn::base::function_ref<bool(const LowLeve
 	case LLIL_PUSH:
 	case LLIL_NEG:
 	case LLIL_NOT:
+	case LLIL_BSWAP:
+	case LLIL_POPCNT:
+	case LLIL_CLZ:
+	case LLIL_CTZ:
+	case LLIL_RBIT:
+	case LLIL_CLS:
 	case LLIL_SX:
 	case LLIL_ZX:
 	case LLIL_LOW_PART:
@@ -2301,6 +2313,12 @@ ExprId LowLevelILInstruction::CopyTo(
 	case LLIL_PUSH:
 	case LLIL_NEG:
 	case LLIL_NOT:
+	case LLIL_BSWAP:
+	case LLIL_POPCNT:
+	case LLIL_CLZ:
+	case LLIL_CTZ:
+	case LLIL_RBIT:
+	case LLIL_CLS:
 	case LLIL_SX:
 	case LLIL_ZX:
 	case LLIL_LOW_PART:
@@ -3352,6 +3370,42 @@ ExprId LowLevelILFunction::Not(size_t size, ExprId a, uint32_t flags, const ILSo
 }
 
 
+ExprId LowLevelILFunction::ByteSwap(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_BSWAP, loc, size, flags, a);
+}
+
+
+ExprId LowLevelILFunction::PopulationCount(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_POPCNT, loc, size, flags, a);
+}
+
+
+ExprId LowLevelILFunction::CountLeadingZeros(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_CLZ, loc, size, flags, a);
+}
+
+
+ExprId LowLevelILFunction::CountTrailingZeros(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_CTZ, loc, size, flags, a);
+}
+
+
+ExprId LowLevelILFunction::ReverseBits(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_RBIT, loc, size, flags, a);
+}
+
+
+ExprId LowLevelILFunction::CountLeadingSigns(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
+{
+	return AddExprWithLocation(LLIL_CLS, loc, size, flags, a);
+}
+
+
 ExprId LowLevelILFunction::SignExtend(size_t size, ExprId a, uint32_t flags, const ILSourceLocation& loc)
 {
 	return AddExprWithLocation(LLIL_SX, loc, size, flags, a);
-- 
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