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Diffstat (limited to 'js/src/vm/Opcodes.h')
| -rw-r--r-- | js/src/vm/Opcodes.h | 2314 |
1 files changed, 2314 insertions, 0 deletions
diff --git a/js/src/vm/Opcodes.h b/js/src/vm/Opcodes.h new file mode 100644 index 0000000000..18ae6f0736 --- /dev/null +++ b/js/src/vm/Opcodes.h @@ -0,0 +1,2314 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=8 sw=4 et tw=0 ft=c: + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef vm_Opcodes_h +#define vm_Opcodes_h + +#include "mozilla/Attributes.h" + +#include <stddef.h> + +/* + * JavaScript operation bytecodes. Add a new bytecode by claiming one of the + * JSOP_UNUSED* here or by extracting the first unused opcode from + * FOR_EACH_TRAILING_UNUSED_OPCODE and updating js::detail::LastDefinedOpcode + * below. + * + * Includers must define a macro with the following form: + * + * #define MACRO(op,val,name,image,length,nuses,ndefs,format) ... + * + * Then simply use FOR_EACH_OPCODE(MACRO) to invoke MACRO for every opcode. + * Selected arguments can be expanded in initializers. + * + * Field Description + * op Bytecode name, which is the JSOp enumerator name + * value Bytecode value, which is the JSOp enumerator value + * name C string containing name for disassembler + * image C string containing "image" for pretty-printer, null if ugly + * length Number of bytes including any immediate operands + * nuses Number of stack slots consumed by bytecode, -1 if variadic + * ndefs Number of stack slots produced by bytecode, -1 if variadic + * format Bytecode plus immediate operand encoding format + * + * This file is best viewed with 128 columns: +12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678 + */ + +/* + * SpiderMonkey bytecode categorization (as used in generated documentation): + * + * [Index] + * [Statements] + * Jumps + * Switch Statement + * For-In Statement + * With Statement + * Exception Handling + * Function + * Generator + * Debugger + * [Variables and Scopes] + * Variables + * Free Variables + * Local Variables + * Aliased Variables + * Intrinsics + * Block-local Scope + * This + * Super + * Arguments + * Var Scope + * [Operators] + * Comparison Operators + * Arithmetic Operators + * Bitwise Logical Operators + * Bitwise Shift Operators + * Logical Operators + * Special Operators + * Stack Operations + * Debugger + * [Literals] + * Constants + * Object + * Array + * RegExp + * Class + * [Other] + */ + +#define FOR_EACH_OPCODE(macro) \ + /* legend: op val name image len use def format */ \ + /* + * No operation is performed. + * Category: Other + * Operands: + * Stack: => + */ \ + macro(JSOP_NOP, 0, "nop", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* Long-standing JavaScript bytecodes. */ \ + /* + * Pushes 'undefined' onto the stack. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => undefined + */ \ + macro(JSOP_UNDEFINED, 1, js_undefined_str, "", 1, 0, 1, JOF_BYTE) \ + /* + * Pushes stack frame's 'rval' onto the stack. + * Category: Statements + * Type: Function + * Operands: + * Stack: => rval + */ \ + macro(JSOP_GETRVAL, 2, "getrval", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pops the top of stack value, converts it to an object, and adds a + * 'WithEnvironmentObject' wrapping that object to the scope chain. + * + * There is a matching JSOP_LEAVEWITH instruction later. All name + * lookups between the two that may need to consult the With object + * are deoptimized. + * Category: Statements + * Type: With Statement + * Operands: uint32_t staticWithIndex + * Stack: val => + */ \ + macro(JSOP_ENTERWITH, 3, "enterwith", NULL, 5, 1, 0, JOF_SCOPE) \ + /* + * Pops the scope chain object pushed by JSOP_ENTERWITH. + * Category: Statements + * Type: With Statement + * Operands: + * Stack: => + */ \ + macro(JSOP_LEAVEWITH, 4, "leavewith", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * Pops the top of stack value as 'rval', stops interpretation of current + * script and returns 'rval'. + * Category: Statements + * Type: Function + * Operands: + * Stack: rval => + */ \ + macro(JSOP_RETURN, 5, "return", NULL, 1, 1, 0, JOF_BYTE) \ + /* + * Jumps to a 32-bit offset from the current bytecode. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: => + */ \ + macro(JSOP_GOTO, 6, "goto", NULL, 5, 0, 0, JOF_JUMP) \ + /* + * Pops the top of stack value, converts it into a boolean, if the result is + * 'false', jumps to a 32-bit offset from the current bytecode. + * + * The idea is that a sequence like + * JSOP_ZERO; JSOP_ZERO; JSOP_EQ; JSOP_IFEQ; JSOP_RETURN; + * reads like a nice linear sequence that will execute the return. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: cond => + */ \ + macro(JSOP_IFEQ, 7, "ifeq", NULL, 5, 1, 0, JOF_JUMP|JOF_DETECTING) \ + /* + * Pops the top of stack value, converts it into a boolean, if the result is + * 'true', jumps to a 32-bit offset from the current bytecode. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: cond => + */ \ + macro(JSOP_IFNE, 8, "ifne", NULL, 5, 1, 0, JOF_JUMP) \ + \ + /* + * Pushes the 'arguments' object for the current function activation. + * + * If 'JSScript' is not marked 'needsArgsObj', then a + * JS_OPTIMIZED_ARGUMENTS magic value is pushed. Otherwise, a proper + * arguments object is constructed and pushed. + * + * This opcode requires that the function does not have rest parameter. + * Category: Variables and Scopes + * Type: Arguments + * Operands: + * Stack: => arguments + */ \ + macro(JSOP_ARGUMENTS, 9, "arguments", NULL, 1, 0, 1, JOF_BYTE) \ + \ + /* + * Swaps the top two values on the stack. This is useful for things like + * post-increment/decrement. + * Category: Operators + * Type: Stack Operations + * Operands: + * Stack: v1, v2 => v2, v1 + */ \ + macro(JSOP_SWAP, 10, "swap", NULL, 1, 2, 2, JOF_BYTE) \ + /* + * Pops the top 'n' values from the stack. + * Category: Operators + * Type: Stack Operations + * Operands: uint16_t n + * Stack: v[n-1], ..., v[1], v[0] => + * nuses: n + */ \ + macro(JSOP_POPN, 11, "popn", NULL, 3, -1, 0, JOF_UINT16) \ + \ + /* More long-standing bytecodes. */ \ + /* + * Pushes a copy of the top value on the stack. + * Category: Operators + * Type: Stack Operations + * Operands: + * Stack: v => v, v + */ \ + macro(JSOP_DUP, 12, "dup", NULL, 1, 1, 2, JOF_BYTE) \ + /* + * Duplicates the top two values on the stack. + * Category: Operators + * Type: Stack Operations + * Operands: + * Stack: v1, v2 => v1, v2, v1, v2 + */ \ + macro(JSOP_DUP2, 13, "dup2", NULL, 1, 2, 4, JOF_BYTE) \ + \ + /* + * Checks that the top value on the stack is an object, and throws a + * TypeError if not. The operand 'kind' is used only to generate an + * appropriate error message. + * Category: Statements + * Type: Generator + * Operands: uint8_t kind + * Stack: result => result + */ \ + macro(JSOP_CHECKISOBJ,14, "checkisobj", NULL, 2, 1, 1, JOF_UINT8) \ + \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * the result of the operation applied to the two operands, converting + * both to 32-bit signed integers if necessary. + * Category: Operators + * Type: Bitwise Logical Operators + * Operands: + * Stack: lval, rval => (lval OP rval) + */ \ + macro(JSOP_BITOR, 15, "bitor", "|", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_BITXOR, 16, "bitxor", "^", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_BITAND, 17, "bitand", "&", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the top two values from the stack and pushes the result of + * comparing them. + * Category: Operators + * Type: Comparison Operators + * Operands: + * Stack: lval, rval => (lval OP rval) + */ \ + macro(JSOP_EQ, 18, "eq", "==", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH|JOF_DETECTING) \ + macro(JSOP_NE, 19, "ne", "!=", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH|JOF_DETECTING) \ + macro(JSOP_LT, 20, "lt", "<", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_LE, 21, "le", "<=", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_GT, 22, "gt", ">", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_GE, 23, "ge", ">=", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * the result of the operation applied to the operands. + * Category: Operators + * Type: Bitwise Shift Operators + * Operands: + * Stack: lval, rval => (lval OP rval) + */ \ + macro(JSOP_LSH, 24, "lsh", "<<", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_RSH, 25, "rsh", ">>", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * 'lval >>> rval'. + * Category: Operators + * Type: Bitwise Shift Operators + * Operands: + * Stack: lval, rval => (lval >>> rval) + */ \ + macro(JSOP_URSH, 26, "ursh", ">>>", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * the result of 'lval + rval'. + * Category: Operators + * Type: Arithmetic Operators + * Operands: + * Stack: lval, rval => (lval + rval) + */ \ + macro(JSOP_ADD, 27, "add", "+", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * the result of applying the arithmetic operation to them. + * Category: Operators + * Type: Arithmetic Operators + * Operands: + * Stack: lval, rval => (lval OP rval) + */ \ + macro(JSOP_SUB, 28, "sub", "-", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_MUL, 29, "mul", "*", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_DIV, 30, "div", "/", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_MOD, 31, "mod", "%", 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC|JOF_ARITH) \ + /* + * Pops the value 'val' from the stack, then pushes '!val'. + * Category: Operators + * Type: Logical Operators + * Operands: + * Stack: val => (!val) + */ \ + macro(JSOP_NOT, 32, "not", "!", 1, 1, 1, JOF_BYTE|JOF_ARITH|JOF_DETECTING) \ + /* + * Pops the value 'val' from the stack, then pushes '~val'. + * Category: Operators + * Type: Bitwise Logical Operators + * Operands: + * Stack: val => (~val) + */ \ + macro(JSOP_BITNOT, 33, "bitnot", "~", 1, 1, 1, JOF_BYTE|JOF_ARITH) \ + /* + * Pops the value 'val' from the stack, then pushes '-val'. + * Category: Operators + * Type: Arithmetic Operators + * Operands: + * Stack: val => (-val) + */ \ + macro(JSOP_NEG, 34, "neg", "- ", 1, 1, 1, JOF_BYTE|JOF_ARITH) \ + /* + * Pops the value 'val' from the stack, then pushes '+val'. + * ('+val' is the value converted to a number.) + * Category: Operators + * Type: Arithmetic Operators + * Operands: + * Stack: val => (+val) + */ \ + macro(JSOP_POS, 35, "pos", "+ ", 1, 1, 1, JOF_BYTE|JOF_ARITH) \ + /* + * Looks up name on the scope chain and deletes it, pushes 'true' onto the + * stack if succeeded (if the property was present and deleted or if the + * property wasn't present in the first place), 'false' if not. + * + * Strict mode code should never contain this opcode. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => succeeded + */ \ + macro(JSOP_DELNAME, 36, "delname", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_CHECKSLOPPY) \ + /* + * Pops the top of stack value, deletes property from it, pushes 'true' onto + * the stack if succeeded, 'false' if not. + * Category: Operators + * Type: Special Operators + * Operands: uint32_t nameIndex + * Stack: obj => succeeded + */ \ + macro(JSOP_DELPROP, 37, "delprop", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_CHECKSLOPPY) \ + /* + * Pops the top two values on the stack as 'propval' and 'obj', + * deletes 'propval' property from 'obj', pushes 'true' onto the stack if + * succeeded, 'false' if not. + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: obj, propval => succeeded + */ \ + macro(JSOP_DELELEM, 38, "delelem", NULL, 1, 2, 1, JOF_BYTE |JOF_ELEM|JOF_CHECKSLOPPY) \ + /* + * Pops the value 'val' from the stack, then pushes 'typeof val'. + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: val => (typeof val) + */ \ + macro(JSOP_TYPEOF, 39, js_typeof_str,NULL, 1, 1, 1, JOF_BYTE|JOF_DETECTING) \ + /* + * Pops the top value on the stack and pushes 'undefined'. + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: val => undefined + */ \ + macro(JSOP_VOID, 40, js_void_str, NULL, 1, 1, 1, JOF_BYTE) \ + \ + /* + * spreadcall variant of JSOP_CALL. + * + * Invokes 'callee' with 'this' and 'args', pushes the return value onto + * the stack. + * + * 'args' is an Array object which contains actual arguments. + * Category: Statements + * Type: Function + * Operands: + * Stack: callee, this, args => rval + */ \ + macro(JSOP_SPREADCALL,41, "spreadcall", NULL, 1, 3, 1, JOF_BYTE|JOF_INVOKE|JOF_TYPESET) \ + /* + * spreadcall variant of JSOP_NEW + * + * Invokes 'callee' as a constructor with 'this' and 'args', pushes the + * return value onto the stack. + * Category: Statements + * Type: Function + * Operands: + * Stack: callee, this, args, newTarget => rval + */ \ + macro(JSOP_SPREADNEW, 42, "spreadnew", NULL, 1, 4, 1, JOF_BYTE|JOF_INVOKE|JOF_TYPESET) \ + /* + * spreadcall variant of JSOP_EVAL + * + * Invokes 'eval' with 'args' and pushes the return value onto the stack. + * + * If 'eval' in global scope is not original one, invokes the function + * with 'this' and 'args', and pushes return value onto the stack. + * Category: Statements + * Type: Function + * Operands: + * Stack: callee, this, args => rval + */ \ + macro(JSOP_SPREADEVAL,43, "spreadeval", NULL, 1, 3, 1, JOF_BYTE|JOF_INVOKE|JOF_TYPESET|JOF_CHECKSLOPPY) \ + \ + /* + * Duplicates the Nth value from the top onto the stack. + * Category: Operators + * Type: Stack Operations + * Operands: uint24_t n + * Stack: v[n], v[n-1], ..., v[1], v[0] => + * v[n], v[n-1], ..., v[1], v[0], v[n] + */ \ + macro(JSOP_DUPAT, 44, "dupat", NULL, 4, 0, 1, JOF_UINT24) \ + \ + /* + * Push a well-known symbol onto the operand stack. + * Category: Literals + * Type: Constants + * Operands: uint8_t n, the JS::SymbolCode of the symbol to use + * Stack: => symbol + */ \ + macro(JSOP_SYMBOL, 45, "symbol", NULL, 2, 0, 1, JOF_UINT8) \ + \ + /* + * Pops the top of stack value and attempts to delete the given property + * from it. Pushes 'true' onto success, else throws a TypeError per strict + * mode property-deletion requirements. + * Category: Operators + * Type: Special Operators + * Operands: uint32_t nameIndex + * Stack: obj => succeeded + */ \ + macro(JSOP_STRICTDELPROP, 46, "strict-delprop", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_CHECKSTRICT) \ + /* + * Pops the top two values on the stack as 'propval' and 'obj', + * and attempts to delete 'propval' property from 'obj'. Pushes 'true' onto + * the stack on success, else throws a TypeError per strict mode property + * deletion requirements. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, propval => succeeded + */ \ + macro(JSOP_STRICTDELELEM, 47, "strict-delelem", NULL, 1, 2, 1, JOF_BYTE|JOF_ELEM|JOF_CHECKSTRICT) \ + /* + * Pops the top two values on the stack as 'val' and 'obj', and performs + * 'obj.prop = val', pushing 'val' back onto the stack. Throws a TypeError + * if the set-operation failed (per strict mode semantics). + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => val + */ \ + macro(JSOP_STRICTSETPROP, 48, "strict-setprop", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING|JOF_CHECKSTRICT) \ + /* + * Pops a scope and value from the stack, assigns value to the given name, + * and pushes the value back on the stack. If the set failed, then throw + * a TypeError, per usual strict mode semantics. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: scope, val => val + */ \ + macro(JSOP_STRICTSETNAME, 49, "strict-setname", NULL, 5, 2, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING|JOF_CHECKSTRICT) \ + /* + * spreadcall variant of JSOP_EVAL + * + * Invokes 'eval' with 'args' and pushes the return value onto the stack. + * + * If 'eval' in global scope is not original one, invokes the function + * with 'this' and 'args', and pushes return value onto the stack. + * Category: Statements + * Type: Function + * Operands: + * Stack: callee, this, args => rval + */ \ + macro(JSOP_STRICTSPREADEVAL, 50, "strict-spreadeval", NULL, 1, 3, 1, JOF_BYTE|JOF_INVOKE|JOF_TYPESET|JOF_CHECKSTRICT) \ + /* + * Writes the [[Prototype]] objects for both a class and its .prototype to + * the stack, given the result of a heritage expression. + * Category: Literals + * Type: Object + * Operands: + * Stack: heritage => funcProto, objProto + */ \ + macro(JSOP_CLASSHERITAGE, 51, "classheritage", NULL, 1, 1, 2, JOF_BYTE) \ + /* + * Pushes a clone of a function with a given [[Prototype]] onto the stack. + * Category: Statements + * Type: Function + * Operands: uint32_t funcIndex + * Stack: proto => obj + */ \ + macro(JSOP_FUNWITHPROTO, 52, "funwithproto", NULL, 5, 1, 1, JOF_OBJECT) \ + \ + /* + * Pops the top of stack value, pushes property of it onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj => obj[name] + */ \ + macro(JSOP_GETPROP, 53, "getprop", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_TYPESET) \ + /* + * Pops the top two values on the stack as 'val' and 'obj' and performs + * 'obj.prop = val', pushing 'val' back onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => val + */ \ + macro(JSOP_SETPROP, 54, "setprop", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING|JOF_CHECKSLOPPY) \ + /* + * Pops the top two values on the stack as 'propval' and 'obj', pushes + * 'propval' property of 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, propval => obj[propval] + */ \ + macro(JSOP_GETELEM, 55, "getelem", NULL, 1, 2, 1, JOF_BYTE |JOF_ELEM|JOF_TYPESET|JOF_LEFTASSOC) \ + /* + * Pops the top three values on the stack as 'val', 'propval' and 'obj', + * sets 'propval' property of 'obj' as 'val', pushes 'obj' onto the + * stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, propval, val => val + */ \ + macro(JSOP_SETELEM, 56, "setelem", NULL, 1, 3, 1, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING|JOF_CHECKSLOPPY) \ + /* + * Pops the top three values on the stack as 'val', 'propval' and 'obj', + * sets 'propval' property of 'obj' as 'val', pushes 'obj' onto the + * stack. Throws a TypeError if the set fails, per strict mode + * semantics. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, propval, val => val + */ \ + macro(JSOP_STRICTSETELEM, 57, "strict-setelem", NULL, 1, 3, 1, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING|JOF_CHECKSTRICT) \ + /* + * Invokes 'callee' with 'this' and 'args', pushes return value onto the + * stack. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1] => rval + * nuses: (argc+2) + */ \ + macro(JSOP_CALL, 58, "call", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + /* + * Looks up name on the scope chain and pushes its value onto the stack. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => val + */ \ + macro(JSOP_GETNAME, 59, "getname", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_TYPESET) \ + /* + * Pushes numeric constant onto the stack. + * Category: Literals + * Type: Constants + * Operands: uint32_t constIndex + * Stack: => val + */ \ + macro(JSOP_DOUBLE, 60, "double", NULL, 5, 0, 1, JOF_DOUBLE) \ + /* + * Pushes string constant onto the stack. + * Category: Literals + * Type: Constants + * Operands: uint32_t atomIndex + * Stack: => string + */ \ + macro(JSOP_STRING, 61, "string", NULL, 5, 0, 1, JOF_ATOM) \ + /* + * Pushes '0' onto the stack. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => 0 + */ \ + macro(JSOP_ZERO, 62, "zero", "0", 1, 0, 1, JOF_BYTE) \ + /* + * Pushes '1' onto the stack. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => 1 + */ \ + macro(JSOP_ONE, 63, "one", "1", 1, 0, 1, JOF_BYTE) \ + /* + * Pushes 'null' onto the stack. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => null + */ \ + macro(JSOP_NULL, 64, js_null_str, js_null_str, 1, 0, 1, JOF_BYTE) \ + /* + * Pushes 'JS_IS_CONSTRUCTING' + * Category: Literals + * Type: Constants + * Operands: + * Stack: => JS_IS_CONSTRUCTING + */ \ + macro(JSOP_IS_CONSTRUCTING, 65, "is-constructing", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pushes boolean value onto the stack. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => true/false + */ \ + macro(JSOP_FALSE, 66, js_false_str, js_false_str, 1, 0, 1, JOF_BYTE) \ + macro(JSOP_TRUE, 67, js_true_str, js_true_str, 1, 0, 1, JOF_BYTE) \ + /* + * Converts the top of stack value into a boolean, if the result is 'true', + * jumps to a 32-bit offset from the current bytecode. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: cond => cond + */ \ + macro(JSOP_OR, 68, "or", NULL, 5, 1, 1, JOF_JUMP|JOF_DETECTING|JOF_LEFTASSOC) \ + /* + * Converts the top of stack value into a boolean, if the result is 'false', + * jumps to a 32-bit offset from the current bytecode. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: cond => cond + */ \ + macro(JSOP_AND, 69, "and", NULL, 5, 1, 1, JOF_JUMP|JOF_DETECTING|JOF_LEFTASSOC) \ + \ + /* + * Pops the top of stack value as 'i', if 'low <= i <= high', + * jumps to a 32-bit offset: 'offset[i - low]' from the current bytecode, + * jumps to a 32-bit offset: 'len' from the current bytecode if not. + * + * This opcode has variable length. + * Category: Statements + * Type: Switch Statement + * Operands: int32_t len, int32_t low, int32_t high, + * int32_t offset[0], ..., int32_t offset[high-low] + * Stack: i => + * len: len + */ \ + macro(JSOP_TABLESWITCH, 70, "tableswitch", NULL, -1, 1, 0, JOF_TABLESWITCH|JOF_DETECTING) \ + \ + /* + * Prologue emitted in scripts expected to run once, which deoptimizes code + * if it executes multiple times. + * Category: Statements + * Type: Function + * Operands: + * Stack: => + */ \ + macro(JSOP_RUNONCE, 71, "runonce", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* New, infallible/transitive identity ops. */ \ + /* + * Pops the top two values from the stack, then pushes the result of + * applying the operator to the two values. + * Category: Operators + * Type: Comparison Operators + * Operands: + * Stack: lval, rval => (lval OP rval) + */ \ + macro(JSOP_STRICTEQ, 72, "stricteq", "===", 1, 2, 1, JOF_BYTE|JOF_DETECTING|JOF_LEFTASSOC|JOF_ARITH) \ + macro(JSOP_STRICTNE, 73, "strictne", "!==", 1, 2, 1, JOF_BYTE|JOF_DETECTING|JOF_LEFTASSOC|JOF_ARITH) \ + \ + /* + * Sometimes we know when emitting that an operation will always throw. + * + * Throws the indicated JSMSG. + * + * Category: Statements + * Type: Exception Handling + * Operands: uint16_t msgNumber + * Stack: => + */ \ + macro(JSOP_THROWMSG, 74, "throwmsg", NULL, 3, 0, 0, JOF_UINT16) \ + \ + /* + * Sets up a for-in or for-each-in loop using the JSITER_* flag bits in + * this op's uint8_t immediate operand. It pops the top of stack value as + * 'val' and pushes 'iter' which is an iterator for 'val'. + * Category: Statements + * Type: For-In Statement + * Operands: uint8_t flags + * Stack: val => iter + */ \ + macro(JSOP_ITER, 75, "iter", NULL, 2, 1, 1, JOF_UINT8) \ + /* + * Pushes the next iterated value onto the stack. If no value is available, + * MagicValue(JS_NO_ITER_VALUE) is pushed. + * + * Category: Statements + * Type: For-In Statement + * Operands: + * Stack: iter => iter, val + */ \ + macro(JSOP_MOREITER, 76, "moreiter", NULL, 1, 1, 2, JOF_BYTE) \ + /* + * Pushes a boolean indicating whether the value on top of the stack is + * MagicValue(JS_NO_ITER_VALUE). + * + * Category: Statements + * Type: For-In Statement + * Operands: + * Stack: val => val, res + */ \ + macro(JSOP_ISNOITER, 77, "isnoiter", NULL, 1, 1, 2, JOF_BYTE) \ + /* + * Exits a for-in loop by popping the iterator object from the stack and + * closing it. + * Category: Statements + * Type: For-In Statement + * Operands: + * Stack: iter => + */ \ + macro(JSOP_ENDITER, 78, "enditer", NULL, 1, 1, 0, JOF_BYTE) \ + \ + /* + * Invokes 'callee' with 'this' and 'args', pushes return value onto the + * stack. + * + * This is for 'f.apply'. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1] => rval + * nuses: (argc+2) + */ \ + macro(JSOP_FUNAPPLY, 79, "funapply", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + \ + /* + * Pushes deep-cloned object literal or singleton onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t objectIndex + * Stack: => obj + */ \ + macro(JSOP_OBJECT, 80, "object", NULL, 5, 0, 1, JOF_OBJECT) \ + \ + /* + * Pops the top value off the stack. + * Category: Operators + * Type: Stack Operations + * Operands: + * Stack: v => + */ \ + macro(JSOP_POP, 81, "pop", NULL, 1, 1, 0, JOF_BYTE) \ + \ + /* + * Invokes 'callee' as a constructor with 'this' and 'args', pushes return + * value onto the stack. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1], newTarget => rval + * nuses: (argc+3) + */ \ + macro(JSOP_NEW, 82, "new", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + /* + * Pushes newly created object onto the stack with provided [[Prototype]]. + * + * Category: Literals + * Type: Object + * Operands: + * Stack: proto => obj + */ \ + macro(JSOP_OBJWITHPROTO, 83, "objwithproto", NULL, 1, 1, 1, JOF_BYTE) \ + \ + /* + * Fast get op for function arguments and local variables. + * + * Pushes 'arguments[argno]' onto the stack. + * Category: Variables and Scopes + * Type: Arguments + * Operands: uint16_t argno + * Stack: => arguments[argno] + */ \ + macro(JSOP_GETARG, 84, "getarg", NULL, 3, 0, 1, JOF_QARG |JOF_NAME) \ + /* + * Fast set op for function arguments and local variables. + * + * Sets 'arguments[argno]' as the top of stack value. + * Category: Variables and Scopes + * Type: Arguments + * Operands: uint16_t argno + * Stack: v => v + */ \ + macro(JSOP_SETARG, 85, "setarg", NULL, 3, 1, 1, JOF_QARG |JOF_NAME|JOF_SET) \ + /* + * Pushes the value of local variable onto the stack. + * Category: Variables and Scopes + * Type: Local Variables + * Operands: uint32_t localno + * Stack: => val + */ \ + macro(JSOP_GETLOCAL, 86,"getlocal", NULL, 4, 0, 1, JOF_LOCAL|JOF_NAME) \ + /* + * Stores the top stack value to the given local. + * Category: Variables and Scopes + * Type: Local Variables + * Operands: uint32_t localno + * Stack: v => v + */ \ + macro(JSOP_SETLOCAL, 87,"setlocal", NULL, 4, 1, 1, JOF_LOCAL|JOF_NAME|JOF_SET|JOF_DETECTING) \ + \ + /* + * Pushes unsigned 16-bit int immediate integer operand onto the stack. + * Category: Literals + * Type: Constants + * Operands: uint16_t val + * Stack: => val + */ \ + macro(JSOP_UINT16, 88, "uint16", NULL, 3, 0, 1, JOF_UINT16) \ + \ + /* Object and array literal support. */ \ + /* + * Pushes newly created object onto the stack. + * + * This opcode takes the kind of initializer (JSProto_Array or + * JSProto_Object). + * + * This opcode has three extra bytes so it can be exchanged with + * JSOP_NEWOBJECT during emit. + * Category: Literals + * Type: Object + * Operands: uint8_t kind (, uint24_t extra) + * Stack: => obj + */ \ + macro(JSOP_NEWINIT, 89, "newinit", NULL, 5, 0, 1, JOF_UINT8) \ + /* + * Pushes newly created array onto the stack. + * + * This opcode takes the final length, which is preallocated. + * Category: Literals + * Type: Array + * Operands: uint32_t length + * Stack: => obj + */ \ + macro(JSOP_NEWARRAY, 90, "newarray", NULL, 5, 0, 1, JOF_UINT32) \ + /* + * Pushes newly created object onto the stack. + * + * This opcode takes an object with the final shape, which can be set at + * the start and slots then filled in directly. + * Category: Literals + * Type: Object + * Operands: uint32_t baseobjIndex + * Stack: => obj + */ \ + macro(JSOP_NEWOBJECT, 91, "newobject", NULL, 5, 0, 1, JOF_OBJECT) \ + \ + /* + * Initialize the home object for functions with super bindings. + * + * This opcode takes the function and the object to be the home object, does + * the set, and leaves both on the stack. + * Category: Literals + * Type: Object + * Operands: uint8_t n + * Stack: homeObject, [...n], fun => homeObject, [...n], fun + */\ + macro(JSOP_INITHOMEOBJECT, 92, "inithomeobject", NULL, 2, 2, 2, JOF_UINT8) \ + \ + /* + * Initialize a named property in an object literal, like '{a: x}'. + * + * Pops the top two values on the stack as 'val' and 'obj', defines + * 'nameIndex' property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITPROP, 93, "initprop", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + \ + /* + * Initialize a numeric property in an object literal, like '{1: x}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITELEM, 94, "initelem", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + \ + /* + * Pops the top three values on the stack as 'val', 'index' and 'obj', sets + * 'index' property of 'obj' as 'val', pushes 'obj' and 'index + 1' onto + * the stack. + * + * This opcode is used in Array literals with spread and spreadcall + * arguments. + * Category: Literals + * Type: Array + * Operands: + * Stack: obj, index, val => obj, (index + 1) + */ \ + macro(JSOP_INITELEM_INC,95, "initelem_inc", NULL, 1, 3, 2, JOF_BYTE|JOF_ELEM|JOF_SET) \ + \ + /* + * Initialize an array element. + * + * Pops the top two values on the stack as 'val' and 'obj', sets 'index' + * property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Array + * Operands: uint32_t index + * Stack: obj, val => obj + */ \ + macro(JSOP_INITELEM_ARRAY,96, "initelem_array", NULL, 5, 2, 1, JOF_UINT32|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + \ + /* + * Initialize a getter in an object literal. + * + * Pops the top two values on the stack as 'val' and 'obj', defines getter + * of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITPROP_GETTER, 97, "initprop_getter", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a setter in an object literal. + * + * Pops the top two values on the stack as 'val' and 'obj', defines setter + * of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITPROP_SETTER, 98, "initprop_setter", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a numeric getter in an object literal like + * '{get 2() {}}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' getter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITELEM_GETTER, 99, "initelem_getter", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a numeric setter in an object literal like + * '{set 2(v) {}}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' setter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITELEM_SETTER, 100, "initelem_setter", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + /* + * Pushes the call site object specified by objectIndex onto the stack. Defines the raw + * property specified by objectIndex + 1 on the call site object and freezes both the call site + * object as well as its raw property. + * Category: Literals + * Type: Object + * Operands: uint32_t objectIndex + * Stack: => obj + */ \ + macro(JSOP_CALLSITEOBJ, 101, "callsiteobj", NULL, 5, 0, 1, JOF_OBJECT) \ + \ + /* + * Pushes a newly created array onto the stack, whose elements are the same + * as that of a template object's copy on write elements. + * + * Category: Literals + * Type: Array + * Operands: uint32_t objectIndex + * Stack: => obj + */ \ + macro(JSOP_NEWARRAY_COPYONWRITE, 102, "newarray_copyonwrite", NULL, 5, 0, 1, JOF_OBJECT) \ + \ + /* + * Pushes the prototype of the home object for current callee onto the + * stack. + * Category: Variables and Scopes + * Type: Super + * Operands: + * Stack: => homeObjectProto + */\ + macro(JSOP_SUPERBASE, 103, "superbase", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pops the top two values, and pushes the property of one, using the other + * as the receiver. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: receiver obj => obj[name] + */ \ + macro(JSOP_GETPROP_SUPER, 104, "getprop-super", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP) \ + /* + * Pops the top three values on the stack as 'val' and 'obj', and 'receiver', + * and performs 'obj.prop = val', pushing 'val' back onto the stack. + * Throws a TypeError if the set-operation failed (per strict mode semantics). + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: receiver, obj, val => val + */ \ + macro(JSOP_STRICTSETPROP_SUPER, 105, "strictsetprop-super", NULL, 5, 3, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING|JOF_CHECKSTRICT) \ + \ + /* + * This opcode precedes every labeled statement. It's a no-op. + * + * 'offset' is the offset to the next instruction after this statement, + * the one 'break LABEL;' would jump to. IonMonkey uses this. + * Category: Statements + * Type: Jumps + * Operands: int32_t offset + * Stack: => + */ \ + macro(JSOP_LABEL, 106,"label", NULL, 5, 0, 0, JOF_JUMP) \ + \ + /* + * Pops the top three values on the stack as 'val', 'obj' and 'receiver', + * and performs 'obj.prop = val', pushing 'val' back onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: receiver, obj, val => val + */ \ + macro(JSOP_SETPROP_SUPER, 107, "setprop-super", NULL, 5, 3, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING|JOF_CHECKSLOPPY) \ + \ + /* + * Invokes 'callee' with 'this' and 'args', pushes return value onto the + * stack. + * + * If 'callee' is determined to be the canonical 'Function.prototype.call' + * function, then this operation is optimized to directly call 'callee' + * with 'args[0]' as 'this', and the remaining arguments as formal args + * to 'callee'. + * + * Like JSOP_FUNAPPLY but for 'f.call' instead of 'f.apply'. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1] => rval + * nuses: (argc+2) + */ \ + macro(JSOP_FUNCALL, 108,"funcall", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + \ + /* + * Another no-op. + * + * This opcode is the target of the backwards jump for some loop. + * Category: Statements + * Type: Jumps + * Operands: + * Stack: => + */ \ + macro(JSOP_LOOPHEAD, 109,"loophead", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* ECMA-compliant assignment ops. */ \ + /* + * Looks up name on the scope chain and pushes the scope which contains + * the name onto the stack. If not found, pushes global scope onto the + * stack. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => scope + */ \ + macro(JSOP_BINDNAME, 110,"bindname", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_SET) \ + /* + * Pops a scope and value from the stack, assigns value to the given name, + * and pushes the value back on the stack + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: scope, val => val + */ \ + macro(JSOP_SETNAME, 111,"setname", NULL, 5, 2, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING|JOF_CHECKSLOPPY) \ + \ + /* Exception handling ops. */ \ + /* + * Pops the top of stack value as 'v', sets pending exception as 'v', then + * raises error. + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: v => + */ \ + macro(JSOP_THROW, 112,js_throw_str, NULL, 1, 1, 0, JOF_BYTE) \ + \ + /* + * Pops the top two values 'id' and 'obj' from the stack, then pushes + * 'id in obj'. This will throw a 'TypeError' if 'obj' is not an object. + * + * Note that 'obj' is the top value. + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: id, obj => (id in obj) + */ \ + macro(JSOP_IN, 113,js_in_str, js_in_str, 1, 2, 1, JOF_BYTE|JOF_LEFTASSOC) \ + /* + * Pops the top two values 'obj' and 'ctor' from the stack, then pushes + * 'obj instanceof ctor'. This will throw a 'TypeError' if 'obj' is not an + * object. + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: obj, ctor => (obj instanceof ctor) + */ \ + macro(JSOP_INSTANCEOF,114,js_instanceof_str,js_instanceof_str,1,2,1,JOF_BYTE|JOF_LEFTASSOC) \ + \ + /* + * Invokes debugger. + * Category: Statements + * Type: Debugger + * Operands: + * Stack: => + */ \ + macro(JSOP_DEBUGGER, 115,"debugger", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Pushes 'false' and next bytecode's PC onto the stack, and jumps to + * a 32-bit offset from the current bytecode. + * + * This opcode is used for entering 'finally' block. + * Category: Statements + * Type: Exception Handling + * Operands: int32_t offset + * Stack: => false, (next bytecode's PC) + */ \ + macro(JSOP_GOSUB, 116,"gosub", NULL, 5, 0, 0, JOF_JUMP) \ + /* + * Pops the top two values on the stack as 'rval' and 'lval', converts + * 'lval' into a boolean, raises error if the result is 'true', + * jumps to a 32-bit absolute PC: 'rval' if 'false'. + * + * This opcode is used for returning from 'finally' block. + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: lval, rval => + */ \ + macro(JSOP_RETSUB, 117,"retsub", NULL, 1, 2, 0, JOF_BYTE) \ + \ + /* More exception handling ops. */ \ + /* + * Pushes the current pending exception onto the stack and clears the + * pending exception. This is only emitted at the beginning of code for a + * catch-block, so it is known that an exception is pending. It is used to + * implement catch-blocks and 'yield*'. + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: => exception + */ \ + macro(JSOP_EXCEPTION, 118,"exception", NULL, 1, 0, 1, JOF_BYTE) \ + \ + /* + * Embedded lineno to speedup 'pc->line' mapping. + * Category: Other + * Operands: uint32_t lineno + * Stack: => + */ \ + macro(JSOP_LINENO, 119,"lineno", NULL, 5, 0, 0, JOF_UINT32) \ + \ + /* + * This no-op appears after the bytecode for EXPR in 'switch (EXPR) {...}' + * if the switch cannot be optimized using JSOP_TABLESWITCH. + * For a non-optimized switch statement like this: + * + * switch (EXPR) { + * case V0: + * C0; + * ... + * default: + * D; + * } + * + * the bytecode looks like this: + * + * (EXPR) + * condswitch + * (V0) + * case ->C0 + * ... + * default ->D + * (C0) + * ... + * (D) + * + * Note that code for all case-labels is emitted first, then code for + * the body of each case clause. + * Category: Statements + * Type: Switch Statement + * Operands: + * Stack: => + */ \ + macro(JSOP_CONDSWITCH,120,"condswitch", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * Pops the top two values on the stack as 'rval' and 'lval', compare them + * with '===', if the result is 'true', jumps to a 32-bit offset from the + * current bytecode, re-pushes 'lval' onto the stack if 'false'. + * Category: Statements + * Type: Switch Statement + * Operands: int32_t offset + * Stack: lval, rval => lval(if lval !== rval) + */ \ + macro(JSOP_CASE, 121,"case", NULL, 5, 2, 1, JOF_JUMP) \ + /* + * This appears after all cases in a JSOP_CONDSWITCH, whether there is a + * 'default:' label in the switch statement or not. Pop the switch operand + * from the stack and jump to a 32-bit offset from the current bytecode. + * offset from the current bytecode. + * Category: Statements + * Type: Switch Statement + * Operands: int32_t offset + * Stack: lval => + */ \ + macro(JSOP_DEFAULT, 122,"default", NULL, 5, 1, 0, JOF_JUMP) \ + \ + /* ECMA-compliant call to eval op. */ \ + /* + * Invokes 'eval' with 'args' and pushes return value onto the stack. + * + * If 'eval' in global scope is not original one, invokes the function + * with 'this' and 'args', and pushes return value onto the stack. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1] => rval + * nuses: (argc+2) + */ \ + macro(JSOP_EVAL, 123,"eval", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET|JOF_CHECKSLOPPY) \ + \ + /* ECMA-compliant call to eval op. */ \ + /* + * Invokes 'eval' with 'args' and pushes return value onto the stack. + * + * If 'eval' in global scope is not original one, invokes the function + * with 'this' and 'args', and pushes return value onto the stack. + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1] => rval + * nuses: (argc+2) + */ \ + macro(JSOP_STRICTEVAL, 124, "strict-eval", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET|JOF_CHECKSTRICT) \ + /* + * LIKE JSOP_GETELEM but takes receiver on stack, and the propval is + * evaluated before the obj. + * Category: Literals + * Type: Object + * Operands: + * Stack: receiver, obj, propval => obj[propval] + */ \ + macro(JSOP_GETELEM_SUPER, 125, "getelem-super", NULL, 1, 3, 1, JOF_BYTE |JOF_ELEM|JOF_LEFTASSOC) \ + /* + * Pushes newly created array for a spread call onto the stack. This has + * the same semantics as JSOP_NEWARRAY, but is distinguished to avoid + * using unboxed arrays in spread calls, which would make compiling spread + * calls in baseline more complex. + * Category: Literals + * Type: Array + * Operands: uint32_t length + * Stack: => obj + */ \ + macro(JSOP_SPREADCALLARRAY, 126, "spreadcallarray", NULL, 5, 0, 1, JOF_UINT32) \ + \ + /* + * Defines the given function on the current scope. + * + * This is used for global scripts and also in some cases for function + * scripts where use of dynamic scoping inhibits optimization. + * Category: Variables and Scopes + * Type: Variables + * Operands: + * Stack: fun => + */ \ + macro(JSOP_DEFFUN, 127,"deffun", NULL, 1, 1, 0, JOF_BYTE) \ + /* Defines the new constant binding on global lexical scope. + * + * Throws if a binding with the same name already exists on the scope, or + * if a var binding with the same name exists on the global. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => + */ \ + macro(JSOP_DEFCONST, 128,"defconst", NULL, 5, 0, 0, JOF_ATOM) \ + /* + * Defines the new binding on the frame's current variables-object (the + * scope object on the scope chain designated to receive new variables). + * + * Throws if the current variables-object is the global object and a + * binding with the same name exists on the global lexical scope. + * + * This is used for global scripts and also in some cases for function + * scripts where use of dynamic scoping inhibits optimization. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => + */ \ + macro(JSOP_DEFVAR, 129,"defvar", NULL, 5, 0, 0, JOF_ATOM) \ + \ + /* + * Pushes a closure for a named or anonymous function expression onto the + * stack. + * Category: Statements + * Type: Function + * Operands: uint32_t funcIndex + * Stack: => obj + */ \ + macro(JSOP_LAMBDA, 130, "lambda", NULL, 5, 0, 1, JOF_OBJECT) \ + /* + * Pops the top of stack value as 'new.target', pushes an arrow function with + * lexical 'new.target' onto the stack. + * Category: Statements + * Type: Function + * Operands: uint32_t funcIndex + * Stack: new.target => obj + */ \ + macro(JSOP_LAMBDA_ARROW, 131, "lambda_arrow", NULL, 5, 1, 1, JOF_OBJECT) \ + \ + /* + * Pushes current callee onto the stack. + * + * Used for named function expression self-naming, if lightweight. + * Category: Variables and Scopes + * Type: Arguments + * Operands: + * Stack: => callee + */ \ + macro(JSOP_CALLEE, 132, "callee", NULL, 1, 0, 1, JOF_BYTE) \ + \ + /* + * Picks the nth element from the stack and moves it to the top of the + * stack. + * Category: Operators + * Type: Stack Operations + * Operands: uint8_t n + * Stack: v[n], v[n-1], ..., v[1], v[0] => v[n-1], ..., v[1], v[0], v[n] + */ \ + macro(JSOP_PICK, 133, "pick", NULL, 2, 0, 0, JOF_UINT8) \ + \ + /* + * This no-op appears at the top of the bytecode for a 'TryStatement'. + * + * Location information for catch/finally blocks is stored in a + * side table, 'script->trynotes()'. + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: => + */ \ + macro(JSOP_TRY, 134,"try", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * This opcode has a def count of 2, but these values are already on the + * stack (they're pushed by JSOP_GOSUB). + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: => false, (next bytecode's PC) + */ \ + macro(JSOP_FINALLY, 135,"finally", NULL, 1, 0, 2, JOF_BYTE) \ + \ + /* + * Pushes aliased variable onto the stack. + * + * An "aliased variable" is a var, let, or formal arg that is aliased. + * Sources of aliasing include: nested functions accessing the vars of an + * enclosing function, function statements that are conditionally executed, + * 'eval', 'with', and 'arguments'. All of these cases require creating a + * CallObject to own the aliased variable. + * + * An ALIASEDVAR opcode contains the following immediates: + * uint8 hops: the number of scope objects to skip to find the ScopeObject + * containing the variable being accessed + * uint24 slot: the slot containing the variable in the ScopeObject (this + * 'slot' does not include RESERVED_SLOTS). + * Category: Variables and Scopes + * Type: Aliased Variables + * Operands: uint8_t hops, uint24_t slot + * Stack: => aliasedVar + */ \ + macro(JSOP_GETALIASEDVAR, 136,"getaliasedvar",NULL, 5, 0, 1, JOF_ENVCOORD|JOF_NAME|JOF_TYPESET) \ + /* + * Sets aliased variable as the top of stack value. + * Category: Variables and Scopes + * Type: Aliased Variables + * Operands: uint8_t hops, uint24_t slot + * Stack: v => v + */ \ + macro(JSOP_SETALIASEDVAR, 137,"setaliasedvar",NULL, 5, 1, 1, JOF_ENVCOORD|JOF_NAME|JOF_SET|JOF_DETECTING) \ + \ + /* + * Checks if the value of the local variable is the + * JS_UNINITIALIZED_LEXICAL magic, throwing an error if so. + * Category: Variables and Scopes + * Type: Local Variables + * Operands: uint32_t localno + * Stack: => + */ \ + macro(JSOP_CHECKLEXICAL, 138, "checklexical", NULL, 4, 0, 0, JOF_LOCAL|JOF_NAME) \ + /* + * Initializes an uninitialized local lexical binding with the top of stack + * value. + * Category: Variables and Scopes + * Type: Local Variables + * Operands: uint32_t localno + * Stack: v => v + */ \ + macro(JSOP_INITLEXICAL, 139, "initlexical", NULL, 4, 1, 1, JOF_LOCAL|JOF_NAME|JOF_SET|JOF_DETECTING) \ + /* + * Checks if the value of the aliased variable is the + * JS_UNINITIALIZED_LEXICAL magic, throwing an error if so. + * Category: Variables and Scopes + * Type: Aliased Variables + * Operands: uint8_t hops, uint24_t slot + * Stack: => + */ \ + macro(JSOP_CHECKALIASEDLEXICAL, 140, "checkaliasedlexical", NULL, 5, 0, 0, JOF_ENVCOORD|JOF_NAME) \ + /* + * Initializes an uninitialized aliased lexical binding with the top of + * stack value. + * Category: Variables and Scopes + * Type: Aliased Variables + * Operands: uint8_t hops, uint24_t slot + * Stack: v => v + */ \ + macro(JSOP_INITALIASEDLEXICAL, 141, "initaliasedlexical", NULL, 5, 1, 1, JOF_ENVCOORD|JOF_NAME|JOF_SET|JOF_DETECTING) \ + /* + * Pushes a JS_UNINITIALIZED_LEXICAL value onto the stack, representing an + * uninitialized lexical binding. + * + * This opcode is used with the JSOP_INITLET opcode. + * Category: Literals + * Type: Constants + * Operands: + * Stack: => uninitialized + */ \ + macro(JSOP_UNINITIALIZED, 142, "uninitialized", NULL, 1, 0, 1, JOF_BYTE) \ + /* Pushes the value of the intrinsic onto the stack. + * + * Intrinsic names are emitted instead of JSOP_*NAME ops when the + * 'CompileOptions' flag 'selfHostingMode' is set. + * + * They are used in self-hosted code to access other self-hosted values and + * intrinsic functions the runtime doesn't give client JS code access to. + * Category: Variables and Scopes + * Type: Intrinsics + * Operands: uint32_t nameIndex + * Stack: => intrinsic[name] + */ \ + macro(JSOP_GETINTRINSIC, 143, "getintrinsic", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_TYPESET) \ + /* + * Stores the top stack value in the specified intrinsic. + * Category: Variables and Scopes + * Type: Intrinsics + * Operands: uint32_t nameIndex + * Stack: val => val + */ \ + macro(JSOP_SETINTRINSIC, 144, "setintrinsic", NULL, 5, 1, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING) \ + /* + * Like JSOP_CALL, but used as part of for-of and destructuring bytecode + * to provide better error messages. + * Category: Statements + * Type: Function + * Operands: uint16_t argc (must be 0) + * Stack: callee, this => rval + * nuses: 2 + */ \ + macro(JSOP_CALLITER, 145, "calliter", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + /* + * Initialize a non-configurable, non-writable, non-enumerable data-property on an object. + * + * Pops the top two values on the stack as 'val' and 'obj', defines + * 'nameIndex' property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITLOCKEDPROP, 146, "initlockedprop", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable data-property on an object. + * + * Pops the top two values on the stack as 'val' and 'obj', defines + * 'nameIndex' property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITHIDDENPROP, 147,"inithiddenprop", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Push "new.target" + * + * Category: Variables and Scopes + * Type: Arguments + * Operands: + * Stack: => new.target + */ \ + macro(JSOP_NEWTARGET, 148, "newtarget", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pops the top of stack value as 'unwrapped', converts it to async + * function 'wrapped', and pushes 'wrapped' back on the stack. + * Category: Statements + * Type: Function + * Operands: + * Stack: unwrapped => wrapped + */ \ + macro(JSOP_TOASYNC, 149, "toasync", NULL, 1, 1, 1, JOF_BYTE) \ + /* + * Pops the top two values 'lval' and 'rval' from the stack, then pushes + * the result of 'Math.pow(lval, rval)'. + * Category: Operators + * Type: Arithmetic Operators + * Operands: + * Stack: lval, rval => (lval ** rval) + */ \ + macro(JSOP_POW, 150, "pow", "**", 1, 2, 1, JOF_BYTE|JOF_ARITH) \ + \ + /* + * Pops the top of stack value as 'v', sets pending exception as 'v', + * to trigger rethrow. + * + * This opcode is used in conditional catch clauses. + * Category: Statements + * Type: Exception Handling + * Operands: + * Stack: v => + */ \ + macro(JSOP_THROWING, 151,"throwing", NULL, 1, 1, 0, JOF_BYTE) \ + \ + /* + * Pops the top of stack value as 'rval', sets the return value in stack + * frame as 'rval'. + * Category: Statements + * Type: Function + * Operands: + * Stack: rval => + */ \ + macro(JSOP_SETRVAL, 152,"setrval", NULL, 1, 1, 0, JOF_BYTE) \ + /* + * Stops interpretation and returns value set by JSOP_SETRVAL. When not set, + * returns 'undefined'. + * + * Also emitted at end of script so interpreter don't need to check if + * opcode is still in script range. + * Category: Statements + * Type: Function + * Operands: + * Stack: => + */ \ + macro(JSOP_RETRVAL, 153,"retrval", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Looks up name on global scope and pushes its value onto the stack, + * unless the script has a non-syntactic global scope, in which case it + * acts just like JSOP_NAME. + * + * Free variable references that must either be found on the global or a + * ReferenceError. + * Category: Variables and Scopes + * Type: Free Variables + * Operands: uint32_t nameIndex + * Stack: => val + */ \ + macro(JSOP_GETGNAME, 154,"getgname", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_TYPESET|JOF_GNAME) \ + /* + * Pops the top two values on the stack as 'val' and 'scope', sets property + * of 'scope' as 'val' and pushes 'val' back on the stack. + * + * 'scope' should be the global scope unless the script has a non-syntactic + * global scope, in which case acts like JSOP_SETNAME. + * Category: Variables and Scopes + * Type: Free Variables + * Operands: uint32_t nameIndex + * Stack: scope, val => val + */ \ + macro(JSOP_SETGNAME, 155,"setgname", NULL, 5, 2, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING|JOF_GNAME|JOF_CHECKSLOPPY) \ + \ + /* + * Pops the top two values on the stack as 'val' and 'scope', sets property + * of 'scope' as 'val' and pushes 'val' back on the stack. Throws a + * TypeError if the set fails, per strict mode semantics. + * + * 'scope' should be the global scope unless the script has a non-syntactic + * global scope, in which case acts like JSOP_STRICTSETNAME. + * Category: Variables and Scopes + * Type: Free Variables + * Operands: uint32_t nameIndex + * Stack: scope, val => val + */ \ + macro(JSOP_STRICTSETGNAME, 156, "strict-setgname", NULL, 5, 2, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_DETECTING|JOF_GNAME|JOF_CHECKSTRICT) \ + /* + * Pushes the implicit 'this' value for calls to the associated name onto + * the stack; only used when we know this implicit this will be our first + * non-syntactic scope. + * + * Category: Variables and Scopes + * Type: This + * Operands: uint32_t nameIndex + * Stack: => this + */ \ + macro(JSOP_GIMPLICITTHIS, 157, "gimplicitthis", "", 5, 0, 1, JOF_ATOM) \ + /* + * LIKE JSOP_SETELEM, but takes receiver on the stack, and the propval is + * evaluated before the base. + * Category: Literals + * Type: Object + * Operands: + * Stack: propval, receiver, obj, val => val + */ \ + macro(JSOP_SETELEM_SUPER, 158, "setelem-super", NULL, 1, 4, 1, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING|JOF_CHECKSLOPPY) \ + /* + * LIKE JSOP_STRICTSETELEM, but takes receiver on the stack, and the + * propval is evaluated before the base. + * Category: Literals + * Type: Object + * Operands: + * Stack: propval, receiver, obj, val => val + */ \ + macro(JSOP_STRICTSETELEM_SUPER, 159, "strict-setelem-super", NULL, 1, 4, 1, JOF_BYTE |JOF_ELEM|JOF_SET|JOF_DETECTING|JOF_CHECKSTRICT) \ + \ + /* + * Pushes a regular expression literal onto the stack. + * It requires special "clone on exec" handling. + * Category: Literals + * Type: RegExp + * Operands: uint32_t regexpIndex + * Stack: => regexp + */ \ + macro(JSOP_REGEXP, 160,"regexp", NULL, 5, 0, 1, JOF_REGEXP) \ + \ + /* + * Initializes an uninitialized global lexical binding with the top of + * stack value. + * Category: Variables and Scopes + * Type: Free Variables + * Operands: uint32_t nameIndex + * Stack: val => val + */ \ + macro(JSOP_INITGLEXICAL, 161,"initglexical", NULL, 5, 1, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_GNAME) \ + \ + /* Defines the new mutable binding on global lexical scope. + * + * Throws if a binding with the same name already exists on the scope, or + * if a var binding with the same name exists on the global. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => + */ \ + macro(JSOP_DEFLET, 162,"deflet", NULL, 5, 0, 0, JOF_ATOM) \ + /* + * Throw if the value on the stack is not coerscible to an object (is |null| or |undefined|). + * Category: Literals + * Type: Object + * Operands: + * Stack: val => val + */ \ + macro(JSOP_CHECKOBJCOERCIBLE, 163, "checkobjcoercible", NULL, 1, 1, 1, JOF_BYTE) \ + /* + * Find the function to invoke with |super()| on the scope chain. + * + * Category: Variables and Scopes + * Type: Super + * Operands: + * Stack: => superFun + */ \ + macro(JSOP_SUPERFUN, 164,"superfun", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Behaves exactly like JSOP_NEW, but allows JITs to distinguish the two cases. + * + * Category: Statements + * Type: Function + * Operands: uint16_t argc + * Stack: callee, this, args[0], ..., args[argc-1], newTarget => rval + * nuses: (argc+3) + */ \ + macro(JSOP_SUPERCALL, 165,"supercall", NULL, 3, -1, 1, JOF_UINT16|JOF_INVOKE|JOF_TYPESET) \ + /* + * spreadcall variant of JSOP_SUPERCALL. + * + * Behaves exactly like JSOP_SPREADNEW. + * + * Category: Statements + * Type: Function + * Operands: + * Stack: callee, this, args, newTarget => rval + */ \ + macro(JSOP_SPREADSUPERCALL, 166, "spreadsupercall", NULL, 1, 4, 1, JOF_BYTE|JOF_INVOKE|JOF_TYPESET) \ + /* + * Push a default constructor for a base class literal. + * + * Category: Literals + * Type: Class + * Operands: atom className + * Stack: => constructor + */ \ + macro(JSOP_CLASSCONSTRUCTOR, 167,"classconstructor", NULL, 5, 0, 1, JOF_ATOM) \ + /* + * Push a default constructor for a derived class literal. + * + * Category: Literals + * Type: Class + * Operands: atom className + * Stack: => constructor + */ \ + macro(JSOP_DERIVEDCONSTRUCTOR, 168,"derivedconstructor", NULL, 5, 1, 1, JOF_ATOM) \ + /* + * Throws a runtime TypeError for invalid assignment to 'const'. The + * localno is used for better error messages. + * + * Category: Variables and Scopes + * Type: Local Variables + * Operands: uint32_t localno + * Stack: => + */ \ + macro(JSOP_THROWSETCONST, 169, "throwsetconst", NULL, 4, 1, 1, JOF_LOCAL|JOF_NAME|JOF_SET|JOF_DETECTING) \ + /* + * Throws a runtime TypeError for invalid assignment to 'const'. The + * scope coordinate is used for better error messages. + * + * Category: Variables and Scopes + * Type: Aliased Variables + * Operands: uint8_t hops, uint24_t slot + * Stack: => + */ \ + macro(JSOP_THROWSETALIASEDCONST, 170, "throwsetaliasedconst", NULL, 5, 1, 1, JOF_ENVCOORD|JOF_NAME|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable getter in an object literal. + * + * Pops the top two values on the stack as 'val' and 'obj', defines + * getter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITHIDDENPROP_GETTER, 171, "inithiddenprop_getter", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable setter in an object literal. + * + * Pops the top two values on the stack as 'val' and 'obj', defines + * setter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj, val => obj + */ \ + macro(JSOP_INITHIDDENPROP_SETTER, 172, "inithiddenprop_setter", NULL, 5, 2, 1, JOF_ATOM|JOF_PROP|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable numeric getter in an object literal like + * '{get 2() {}}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' getter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITHIDDENELEM_GETTER, 173, "inithiddenelem_getter", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable numeric setter in an object literal like + * '{set 2(v) {}}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' setter of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITHIDDENELEM_SETTER, 174, "inithiddenelem_setter", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + /* + * Initialize a non-enumerable numeric property in an object literal, like '{1: x}'. + * + * Pops the top three values on the stack as 'val', 'id' and 'obj', defines + * 'id' property of 'obj' as 'val', pushes 'obj' onto the stack. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, id, val => obj + */ \ + macro(JSOP_INITHIDDENELEM, 175, "inithiddenelem", NULL, 1, 3, 1, JOF_BYTE|JOF_ELEM|JOF_SET|JOF_DETECTING) \ + /* + * Gets the value of a module import by name and pushes it onto the stack. + * Category: Variables and Scopes + * Type: Variables + * Operands: uint32_t nameIndex + * Stack: => val + */ \ + macro(JSOP_GETIMPORT, 176,"getimport", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_TYPESET) \ + /* + * Examines the top stack value, asserting that it's either a self-hosted + * function or a self-hosted intrinsic. This opcode does nothing in a + * non-debug build. + * Category: Other + * Operands: + * Stack: checkVal => checkVal + */ \ + macro(JSOP_DEBUGCHECKSELFHOSTED, 177,"debug-checkselfhosted", NULL, 1, 1, 1, JOF_BYTE) \ + /* + * Pops the top stack value, pushes the value and a boolean value that + * indicates whether the spread operation for the value can be optimized + * in spread call. + * Category: Statements + * Type: Function + * Operands: + * Stack: arr => arr optimized + */ \ + macro(JSOP_OPTIMIZE_SPREADCALL,178,"optimize-spreadcall", NULL, 1, 1, 2, JOF_BYTE) \ + /* + * Throws a runtime TypeError for invalid assignment to the callee in a + * named lambda, which is always a 'const' binding. This is a different + * bytecode than JSOP_SETCONST because the named lambda callee, if not + * closed over, does not have a frame slot to look up the name with for + * the error message. + * + * Category: Variables and Scopes + * Type: Local Variables + * Operands: + * Stack: => + */ \ + macro(JSOP_THROWSETCALLEE, 179, "throwsetcallee", NULL, 1, 1, 1, JOF_SET|JOF_BYTE) \ + /* + * Pushes a var environment onto the env chain. + * Category: Variables and Scopes + * Type: Var Scope + * Operands: uint32_t scopeIndex + * Stack: => + */ \ + macro(JSOP_PUSHVARENV, 180, "pushvarenv", NULL, 5, 0, 0, JOF_SCOPE) \ + /* + * Pops a var environment from the env chain. + * Category: Variables and Scopes + * Type: Var Scope + * Operands: + * Stack: => + */ \ + macro(JSOP_POPVARENV, 181, "popvarenv", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED182, 182,"unused182", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED183, 183,"unused183", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Pops the top of stack value, pushes property of it onto the stack. + * + * Like JSOP_GETPROP but for call context. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj => obj[name] + */ \ + macro(JSOP_CALLPROP, 184,"callprop", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_TYPESET) \ + /* + * Determines the 'this' value for current function frame and pushes it onto + * the stack. Emitted in the prologue of functions with a this-binding. + * Category: Variables and Scopes + * Type: This + * Operands: + * Stack: => this + */ \ + macro(JSOP_FUNCTIONTHIS, 185,"functionthis",NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pushes 'this' value for current stack frame onto the stack. Emitted when + * 'this' refers to the global 'this'. + * Category: Variables and Scopes + * Type: This + * Operands: + * Stack: => this + */ \ + macro(JSOP_GLOBALTHIS, 186,"globalthis", NULL, 1, 0, 1, JOF_BYTE) \ + macro(JSOP_UNUSED187, 187,"unused187", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Pushes unsigned 24-bit int immediate integer operand onto the stack. + * Category: Literals + * Type: Constants + * Operands: uint24_t val + * Stack: => val + */ \ + macro(JSOP_UINT24, 188,"uint24", NULL, 4, 0, 1, JOF_UINT24) \ + /* + * Throw if the value on top of the stack is the TDZ MagicValue. Used in + * derived class constructors. + * Category: Variables and Scopes + * Type: This + * Operands: + * Stack: this => this + */ \ + macro(JSOP_CHECKTHIS, 189,"checkthis", NULL, 1, 1, 1, JOF_BYTE) \ + /* + * Check if a derived class constructor has a valid return value and 'this' + * value before it returns. If the return value is not an object, stores + * the 'this' value to the return value slot. + * Category: Variables and Scopes + * Type: This + * Operands: + * Stack: this => + */ \ + macro(JSOP_CHECKRETURN, 190,"checkreturn", NULL, 1, 1, 0, JOF_BYTE) \ + /* + * Throw an exception if the value on top of the stack is not the TDZ + * MagicValue. Used in derived class constructors. + * Category: Variables and Scopes + * Type: This + * Operands: + * Stack: this => this + */ \ + macro(JSOP_CHECKTHISREINIT,191,"checkthisreinit",NULL,1, 1, 1, JOF_BYTE) \ + macro(JSOP_UNUSED192, 192,"unused192", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Pops the top two values on the stack as 'propval' and 'obj', pushes + * 'propval' property of 'obj' onto the stack. + * + * Like JSOP_GETELEM but for call context. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, propval => obj[propval] + */ \ + macro(JSOP_CALLELEM, 193, "callelem", NULL, 1, 2, 1, JOF_BYTE |JOF_ELEM|JOF_TYPESET|JOF_LEFTASSOC) \ + \ + /* + * '__proto__: v' inside an object initializer. + * + * Pops the top two values on the stack as 'newProto' and 'obj', sets + * prototype of 'obj' as 'newProto', pushes 'true' onto the stack if + * succeeded, 'false' if not. + * Category: Literals + * Type: Object + * Operands: + * Stack: obj, newProto => succeeded + */ \ + macro(JSOP_MUTATEPROTO, 194, "mutateproto",NULL, 1, 2, 1, JOF_BYTE) \ + \ + /* + * Pops the top of stack value, gets an extant property value of it, + * throwing ReferenceError if the identified property does not exist. + * Category: Literals + * Type: Object + * Operands: uint32_t nameIndex + * Stack: obj => obj[name] + */ \ + macro(JSOP_GETXPROP, 195,"getxprop", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_TYPESET) \ + \ + /* + * Pops the top stack value as 'val' and pushes 'typeof val'. Note that + * this opcode isn't used when, in the original source code, 'val' is a + * name -- see 'JSOP_TYPEOF' for that. + * (This is because 'typeof undefinedName === "undefined"'.) + * Category: Operators + * Type: Special Operators + * Operands: + * Stack: val => (typeof val) + */ \ + macro(JSOP_TYPEOFEXPR, 196,"typeofexpr", NULL, 1, 1, 1, JOF_BYTE|JOF_DETECTING) \ + \ + /* Lexical environment support. */ \ + /* + * Replaces the current block on the env chain with a fresh block + * that copies all the bindings in the bock. This operation implements the + * behavior of inducing a fresh lexical environment for every iteration of a + * for(let ...; ...; ...) loop, if any declarations induced by such a loop + * are captured within the loop. + * Category: Variables and Scopes + * Type: Block-local Scope + * Operands: + * Stack: => + */ \ + macro(JSOP_FRESHENLEXICALENV,197,"freshenlexicalenv", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * Recreates the current block on the env chain with a fresh block + * with uninitialized bindings. This operation implements the behavior of + * inducing a fresh lexical environment for every iteration of a for-in/of loop + * whose loop-head has a (captured) lexical declaration. + * Category: Variables and Scopes + * Type: Block-local Scope + * Operands: + * Stack: => + */ \ + macro(JSOP_RECREATELEXICALENV,198,"recreatelexicalenv",NULL,1,0,0,JOF_BYTE) \ + /* + * Pushes lexical environment onto the env chain. + * Category: Variables and Scopes + * Type: Block-local Scope + * Operands: uint32_t scopeIndex + * Stack: => + */ \ + macro(JSOP_PUSHLEXICALENV,199,"pushlexicalenv", NULL, 5, 0, 0, JOF_SCOPE) \ + /* + * Pops lexical environment from the env chain. + * Category: Variables and Scopes + * Type: Block-local Scope + * Operands: + * Stack: => + */ \ + macro(JSOP_POPLEXICALENV, 200,"poplexicalenv", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * The opcode to assist the debugger. + * Category: Statements + * Type: Debugger + * Operands: + * Stack: => + */ \ + macro(JSOP_DEBUGLEAVELEXICALENV, 201,"debugleavelexicalenv", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Pops the generator from the top of the stack, suspends it and stops + * interpretation. + * Category: Statements + * Type: Generator + * Operands: uint24_t yieldIndex + * Stack: generator => + */ \ + macro(JSOP_INITIALYIELD, 202,"initialyield", NULL, 4, 1, 1, JOF_UINT24) \ + /* + * Pops the generator and the return value 'rval1', stops interpretation and + * returns 'rval1'. Pushes sent value from 'send()' onto the stack. + * Category: Statements + * Type: Generator + * Operands: uint24_t yieldIndex + * Stack: rval1, gen => rval2 + */ \ + macro(JSOP_YIELD, 203,"yield", NULL, 4, 2, 1, JOF_UINT24) \ + /* + * Pops the generator and suspends and closes it. Yields the value in the + * frame's return value slot. + * Category: Statements + * Type: Generator + * Operands: + * Stack: gen => + */ \ + macro(JSOP_FINALYIELDRVAL,204,"finalyieldrval",NULL, 1, 1, 0, JOF_BYTE) \ + /* + * Pops the generator and argument from the stack, pushes a new generator + * frame and resumes execution of it. Pushes the return value after the + * generator yields. + * Category: Statements + * Type: Generator + * Operands: resume kind (GeneratorObject::ResumeKind) + * Stack: gen, val => rval + */ \ + macro(JSOP_RESUME, 205,"resume", NULL, 3, 2, 1, JOF_UINT8|JOF_INVOKE) \ + /* + * Pops the top two values on the stack as 'obj' and 'v', pushes 'v' to + * 'obj'. + * + * This opcode is used for Array Comprehension. + * Category: Literals + * Type: Array + * Operands: + * Stack: v, obj => + */ \ + macro(JSOP_ARRAYPUSH, 206,"arraypush", NULL, 1, 2, 0, JOF_BYTE) \ + \ + /* + * No-op bytecode only emitted in some self-hosted functions. Not handled by + * the JITs so the script always runs in the interpreter. + * + * Category: Other + * Operands: + * Stack: => + */ \ + macro(JSOP_FORCEINTERPRETER, 207, "forceinterpreter", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Bytecode emitted after 'yield' expressions to help the Debugger + * fix up the frame in the JITs. No-op in the interpreter. + * + * Category: Operators + * Type: Debugger + * Operands: + * Stack: => + */ \ + macro(JSOP_DEBUGAFTERYIELD, 208, "debugafteryield", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED209, 209, "unused209", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED210, 210, "unused210", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED211, 211, "unused211", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * Initializes generator frame, creates a generator and pushes it on the + * stack. + * Category: Statements + * Type: Generator + * Operands: + * Stack: => generator + */ \ + macro(JSOP_GENERATOR, 212,"generator", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pushes the nearest 'var' environment. + * + * Category: Variables and Scopes + * Type: Free Variables + * Operands: + * Stack: => scope + */ \ + macro(JSOP_BINDVAR, 213, "bindvar", NULL, 1, 0, 1, JOF_BYTE) \ + /* + * Pushes the global scope onto the stack if the script doesn't have a + * non-syntactic global scope. Otherwise will act like JSOP_BINDNAME. + * + * 'nameIndex' is only used when acting like JSOP_BINDNAME. + * Category: Variables and Scopes + * Type: Free Variables + * Operands: uint32_t nameIndex + * Stack: => global + */ \ + macro(JSOP_BINDGNAME, 214, "bindgname", NULL, 5, 0, 1, JOF_ATOM|JOF_NAME|JOF_SET|JOF_GNAME) \ + \ + /* + * Pushes 8-bit int immediate integer operand onto the stack. + * Category: Literals + * Type: Constants + * Operands: int8_t val + * Stack: => val + */ \ + macro(JSOP_INT8, 215, "int8", NULL, 2, 0, 1, JOF_INT8) \ + /* + * Pushes 32-bit int immediate integer operand onto the stack. + * Category: Literals + * Type: Constants + * Operands: int32_t val + * Stack: => val + */ \ + macro(JSOP_INT32, 216, "int32", NULL, 5, 0, 1, JOF_INT32) \ + \ + /* + * Pops the top of stack value, pushes the 'length' property of it onto the + * stack. + * Category: Literals + * Type: Array + * Operands: uint32_t nameIndex + * Stack: obj => obj['length'] + */ \ + macro(JSOP_LENGTH, 217, "length", NULL, 5, 1, 1, JOF_ATOM|JOF_PROP|JOF_TYPESET) \ + \ + /* + * Pushes a JS_ELEMENTS_HOLE value onto the stack, representing an omitted + * property in an array literal (e.g. property 0 in the array '[, 1]'). + * + * This opcode is used with the JSOP_NEWARRAY opcode. + * Category: Literals + * Type: Array + * Operands: + * Stack: => hole + */ \ + macro(JSOP_HOLE, 218, "hole", NULL, 1, 0, 1, JOF_BYTE) \ + \ + macro(JSOP_UNUSED219, 219,"unused219", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED220, 220,"unused220", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED221, 221,"unused221", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED222, 222,"unused222", NULL, 1, 0, 0, JOF_BYTE) \ + macro(JSOP_UNUSED223, 223,"unused223", NULL, 1, 0, 0, JOF_BYTE) \ + \ + /* + * Creates rest parameter array for current function call, and pushes it + * onto the stack. + * Category: Variables and Scopes + * Type: Arguments + * Operands: + * Stack: => rest + */ \ + macro(JSOP_REST, 224, "rest", NULL, 1, 0, 1, JOF_BYTE|JOF_TYPESET) \ + \ + /* + * Replace the top-of-stack value propertyNameValue with + * ToPropertyKey(propertyNameValue). + * Category: Literals + * Type: Object + * Operands: + * Stack: propertyNameValue => propertyKey + */ \ + macro(JSOP_TOID, 225, "toid", NULL, 1, 1, 1, JOF_BYTE) \ + \ + /* + * Pushes the implicit 'this' value for calls to the associated name onto + * the stack. + * Category: Variables and Scopes + * Type: This + * Operands: uint32_t nameIndex + * Stack: => this + */ \ + macro(JSOP_IMPLICITTHIS, 226, "implicitthis", "", 5, 0, 1, JOF_ATOM) \ + \ + /* + * This opcode is the target of the entry jump for some loop. The uint8 + * argument is a bitfield. The lower 7 bits of the argument indicate the + * loop depth. This value starts at 1 and is just a hint: deeply nested + * loops all have the same value. The upper bit is set if Ion should be + * able to OSR at this point, which is true unless there is non-loop state + * on the stack. + * Category: Statements + * Type: Jumps + * Operands: uint8_t BITFIELD + * Stack: => + */ \ + macro(JSOP_LOOPENTRY, 227, "loopentry", NULL, 2, 0, 0, JOF_UINT8) \ + /* + * Converts the value on the top of the stack to a String + * Category: Other + * Operands: + * Stack: val => ToString(val) + */ \ + macro(JSOP_TOSTRING, 228, "tostring", NULL, 1, 1, 1, JOF_BYTE) \ + /* + * No-op used by the decompiler to produce nicer error messages about + * destructuring code. + * Category: Other + * Operands: + * Stack: => + */ \ + macro(JSOP_NOP_DESTRUCTURING, 229, "nop-destructuring", NULL, 1, 0, 0, JOF_BYTE) \ + /* + * This opcode is a no-op and it indicates the location of a jump + * instruction target. Some other opcodes act as jump targets, such as + * LOOPENTRY, as well as all which are matched by BytecodeIsJumpTarget + * function. + * Category: Other + * Operands: + * Stack: => + */ \ + macro(JSOP_JUMPTARGET, 230, "jumptarget", NULL, 1, 0, 0, JOF_BYTE) + +/* + * In certain circumstances it may be useful to "pad out" the opcode space to + * a power of two. Use this macro to do so. + */ +#define FOR_EACH_TRAILING_UNUSED_OPCODE(macro) \ + macro(231) \ + macro(232) \ + macro(233) \ + macro(234) \ + macro(235) \ + macro(236) \ + macro(237) \ + macro(238) \ + macro(239) \ + macro(240) \ + macro(241) \ + macro(242) \ + macro(243) \ + macro(244) \ + macro(245) \ + macro(246) \ + macro(247) \ + macro(248) \ + macro(249) \ + macro(250) \ + macro(251) \ + macro(252) \ + macro(253) \ + macro(254) \ + macro(255) + +namespace js { + +// Sanity check that opcode values and trailing unused opcodes completely cover +// the [0, 256) range. Avert your eyes! You don't want to know how the +// sausage gets made. + +#define VALUE_AND_VALUE_PLUS_ONE(op, val, ...) \ + val) && (val + 1 == +#define TRAILING_VALUE_AND_VALUE_PLUS_ONE(val) \ + val) && (val + 1 == +static_assert((0 == + FOR_EACH_OPCODE(VALUE_AND_VALUE_PLUS_ONE) + FOR_EACH_TRAILING_UNUSED_OPCODE(TRAILING_VALUE_AND_VALUE_PLUS_ONE) + 256), + "opcode values and trailing unused opcode values monotonically " + "increase from zero to 255"); +#undef TRAILING_VALUE_AND_VALUE_PLUS_ONE +#undef VALUE_AND_VALUE_PLUS_ONE + +// Define JSOP_*_LENGTH constants for all ops. +#define DEFINE_LENGTH_CONSTANT(op, val, name, image, len, ...) \ + constexpr size_t op##_LENGTH = len; +FOR_EACH_OPCODE(DEFINE_LENGTH_CONSTANT) +#undef DEFINE_LENGTH_CONSTANT + +} // namespace js + +#endif // vm_Opcodes_h |