ladybird/Libraries/LibJS/Bytecode
Andreas Kling 5b8114a96b AsmInt: Use hardware overflow flag for int32 arithmetic
Replace the pattern of 64-bit arithmetic + sign-extend + compare
with dedicated 32-bit overflow instructions that use the hardware
overflow flag directly.

Before: add t3, t4 / unbox_int32 t5, t3 / branch_ne t3, t5, .overflow
After:  add32_overflow t3, t4, .overflow

On x86_64 this compiles to `add r32, r32; jo label` (the 32-bit
register write implicitly zeros the upper 32 bits). On aarch64,
`adds w, w, w; b.vs label` for add/sub, `smull + sxtw + cmp + b.ne`
for multiply, and `negs + b.vs` for negate.

Nine call sites updated: Add, Sub, Mul, Increment, Decrement,
PostfixIncrement, PostfixDecrement, UnaryMinus, and CallBuiltin(abs).
2026-03-07 22:18:22 +01:00
..
AsmInterpreter AsmInt: Use hardware overflow flag for int32 arithmetic 2026-03-07 22:18:22 +01:00
ASTCodegen.cpp LibJS: Consolidate Put bytecode instructions and reduce code bloat 2026-03-04 18:53:12 +01:00
BasicBlock.cpp LibJS: Stop worrying about Instruction destructors 2025-11-21 09:46:03 +01:00
BasicBlock.h LibJS: Collapse handler/finalizer into single exception handler target 2026-02-09 16:35:39 +01:00
BuiltinAbstractOperationsEnabled.h LibJS: Introduce NativeJavaScriptBackedFunction 2025-11-30 11:54:54 +01:00
Builtins.cpp
Builtins.h LibJS: Skip generic call when using regexp builtins in StringPrototype 2025-12-13 13:51:12 -06:00
Bytecode.def LibJS: Consolidate Put bytecode instructions and reduce code bloat 2026-03-04 18:53:12 +01:00
ClassBlueprint.h LibJS: Add ClassBlueprint data structures 2026-02-11 23:57:41 +01:00
Executable.cpp LibJS: Add dump_to_string() for AST nodes and bytecode executables 2026-02-24 09:39:42 +01:00
Executable.h LibJS: Add dump_to_string() for AST nodes and bytecode executables 2026-02-24 09:39:42 +01:00
FormatOperand.h LibJS: Flatten Operand to 32-bit index in bytecode instruction stream 2025-12-09 21:44:13 -06:00
Generator.cpp LibJS: Consolidate Put bytecode instructions and reduce code bloat 2026-03-04 18:53:12 +01:00
Generator.h LibJS: Consolidate TDZ check emission into Generator helper 2026-02-17 20:44:57 +01:00
IdentifierTable.cpp LibJS+LibWeb+WebContent: Port JS::PropertyKey to UTF-16 2025-08-05 07:07:15 -04:00
IdentifierTable.h LibJS: Give Interpreter a direct pointer to the identifier table 2025-10-07 23:50:51 +02:00
Instruction.cpp LibJS: Flatten Operand to 32-bit index in bytecode instruction stream 2025-12-09 21:44:13 -06:00
Instruction.h Meta: Reformat QtCreator file-listing script for readability 2026-02-23 13:10:03 +01:00
Interpreter.cpp LibJS: Add AsmInterpreter, a low-level assembly bytecode interpreter 2026-03-07 13:09:59 +01:00
Interpreter.h LibJS: Move Interpreter::get/set inline and expose internals 2026-03-07 13:09:59 +01:00
Label.cpp
Label.h LibJS: Revert Enable EXPLICIT_SYMBOL_EXPORT 2025-07-22 11:51:29 -04:00
Operand.h LibJS: Flatten Operand to 32-bit index in bytecode instruction stream 2025-12-09 21:44:13 -06:00
PropertyAccess.h LibJS: Consolidate Put bytecode instructions and reduce code bloat 2026-03-04 18:53:12 +01:00
PropertyKeyTable.cpp LibJS: Cache fully-formed PropertyKeys in Executable 2025-12-11 14:34:45 -06:00
PropertyKeyTable.h LibJS+LibWeb: Add missing GC marking visits 2026-01-07 12:48:58 +01:00
PutKind.h LibJS: Consolidate Put bytecode instructions and reduce code bloat 2026-03-04 18:53:12 +01:00
RegexTable.cpp LibJS: Don't rerun regexp optimizer every time a regexp literal is used 2025-12-12 11:43:35 -06:00
RegexTable.h LibJS: Don't rerun regexp optimizer every time a regexp literal is used 2025-12-12 11:43:35 -06:00
Register.h LibJS: Replace implicit environment stack with explicit registers 2026-02-09 16:35:39 +01:00
ScopedOperand.cpp LibJS: Flatten Operand to 32-bit index in bytecode instruction stream 2025-12-09 21:44:13 -06:00
ScopedOperand.h LibJS: Revert Enable EXPLICIT_SYMBOL_EXPORT 2025-07-22 11:51:29 -04:00
StringTable.cpp LibJS+LibWeb: Port interned bytecode strings to UTF-16 2025-08-14 10:27:08 +02:00
StringTable.h LibJS+LibWeb: Port interned bytecode strings to UTF-16 2025-08-14 10:27:08 +02:00