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opcodesswitch.h
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7233 lines (6340 loc) · 332 KB
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/*
* This file is part of AtomVM.
*
* Copyright 2017 Davide Bettio <davide@uninstall.it>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later
*/
#include "module.h"
#include <assert.h>
#include <string.h>
//#define ENABLE_STACK_TRACE
#include "bif.h"
#include "bitstring.h"
#include "debug.h"
#include "defaultatoms.h"
#include "dist_nifs.h"
#include "exportedfunction.h"
#include "nifs.h"
#include "opcodes.h"
#include "scheduler.h"
#include "utils.h"
#ifdef IMPL_EXECUTE_LOOP
#include "bitstring.h"
#include "mailbox.h"
#include "stacktrace.h"
#endif
//#define ENABLE_TRACE
#include "trace.h"
// These constants can be used to reduce the size of the VM for a specific
// range of compiler versions
#define MINIMUM_OTP_COMPILER_VERSION 21
#define MAXIMUM_OTP_COMPILER_VERSION 26
#ifdef __cplusplus
extern "C" {
#endif
#define COMPACT_LITERAL 0
#define COMPACT_INTEGER 1
#define COMPACT_ATOM 2
#define COMPACT_XREG 3
#define COMPACT_YREG 4
#define COMPACT_LABEL 5
#define COMPACT_EXTENDED 7
#define COMPACT_LARGE_LITERAL 8
#define COMPACT_LARGE_INTEGER 9
#define COMPACT_LARGE_ATOM 10
#define COMPACT_LARGE_XREG 11
#define COMPACT_LARGE_YREG 12
// OTP-20+ format
#define COMPACT_EXTENDED_LIST 0x17
#define COMPACT_EXTENDED_FP_REGISTER 0x27
#define COMPACT_EXTENDED_ALLOCATION_LIST 0x37
#define COMPACT_EXTENDED_LITERAL 0x47
// https://github.com/erlang/otp/blob/master/lib/compiler/src/beam_asm.erl#L433
#define COMPACT_EXTENDED_TYPED_REGISTER 0x57
#define COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_WORDS 0
#define COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FLOATS 1
#define COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FUNS 2
#define COMPACT_LARGE_IMM_MASK 0x18
#define COMPACT_11BITS_VALUE 0x8
#define COMPACT_NBITS_VALUE 0x18
#ifdef IMPL_EXECUTE_LOOP
#define SET_ERROR(error_type_atom) \
x_regs[0] = ERROR_ATOM; \
x_regs[1] = error_type_atom; \
x_regs[2] = stacktrace_create_raw(ctx, mod, pc - code, ERROR_ATOM);
// Override nifs.h RAISE_ERROR macro
#ifdef RAISE_ERROR
#undef RAISE_ERROR
#endif
#define RAISE_ERROR(error_type_atom) \
SET_ERROR(error_type_atom) \
goto handle_error;
#define VM_ABORT() \
goto do_abort;
#endif
#ifdef IMPL_CODE_LOADER
#ifdef ENABLE_TRACE
typedef struct
{
int reg_type;
int index;
} dreg_t;
typedef dreg_t dreg_gc_safe_t;
#define DEST_REGISTER(reg) dreg_t reg
#define GC_SAFE_DEST_REGISTER(reg) dreg_gc_safe_t reg
#define T_DEST_REG(dreg) \
reg_type_c((dreg).reg_type), (int) ((dreg).index)
#define T_DEST_REG_GC_SAFE(dreg) T_DEST_REG(dreg)
#else
#define DEST_REGISTER(...)
#define GC_SAFE_DEST_REGISTER(...)
#endif
// This macro does not decode all cases but cases we actually observe in opcodes
// below. More specific decoding is performed when we know the type of the
// argument
#define DECODE_COMPACT_TERM(dest_term, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
switch (first_byte & 0xF) { \
case COMPACT_LARGE_LITERAL: \
case COMPACT_LITERAL: \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
dest_term = term_from_int4(first_byte >> 4); \
break; \
\
case 1: \
dest_term = term_from_int(((first_byte & 0xE0) << 3) | *(decode_pc)++); \
break; \
\
case 3: { \
uint8_t sz = (first_byte >> 5) + 2; \
avm_int_t val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
dest_term = term_from_int(val); \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
break; \
\
case COMPACT_INTEGER: \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
break; \
\
default: \
fprintf(stderr, "Operand not a small integer: %x, or unsupported encoding\n", (first_byte)); \
AVM_ABORT(); \
break; \
} \
break; \
\
case COMPACT_ATOM: \
case COMPACT_XREG: \
case COMPACT_YREG: \
break; \
\
case COMPACT_EXTENDED: \
switch (first_byte) { \
case COMPACT_EXTENDED_LITERAL: { \
uint8_t first_extended_byte = *(decode_pc)++; \
switch (((first_extended_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
break; \
\
case 1: \
(decode_pc)++; \
break; \
\
case 3: { \
uint8_t sz = (first_extended_byte >> 5) + 2; \
decode_pc += sz; \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
break; \
} \
case COMPACT_EXTENDED_TYPED_REGISTER: { \
uint8_t reg_byte = *(decode_pc)++; \
switch (reg_byte & 0x0F) { \
case COMPACT_XREG: \
case COMPACT_YREG: \
break; \
case COMPACT_LARGE_XREG: \
case COMPACT_LARGE_YREG: \
(decode_pc)++; \
break; \
default: \
fprintf(stderr, "Unexpected reg byte %x @ %" PRIuPTR "\n", \
(int) reg_byte, (uintptr_t) ((decode_pc) - 1)); \
AVM_ABORT(); \
} \
int type_index; \
DECODE_LITERAL(type_index, decode_pc) \
break; \
} \
default: \
fprintf(stderr, "Unexpected extended %x @ %" PRIuPTR "\n", (int) first_byte, (uintptr_t) ((decode_pc) - 1)); \
AVM_ABORT(); \
break; \
} \
break; \
\
case COMPACT_LARGE_INTEGER: \
case COMPACT_LARGE_ATOM: \
switch (first_byte & COMPACT_LARGE_IMM_MASK) { \
case COMPACT_11BITS_VALUE: \
(decode_pc)++; \
break; \
case COMPACT_NBITS_VALUE:{ \
int sz = (first_byte >> 5) + 2; \
if (UNLIKELY(sz > 8)) { \
/* TODO: when first_byte >> 5 is 7, a different encoding is used */ \
fprintf(stderr, "Unexpected nbits vaue @ %" PRIuPTR "\n", (uintptr_t) ((decode_pc) - 1)); \
AVM_ABORT(); \
break; \
} \
(decode_pc) += sz; \
break; \
} \
default: \
assert((first_byte & 0x30) != COMPACT_LARGE_INTEGER); \
break; \
} \
break; \
\
case COMPACT_LARGE_XREG: \
case COMPACT_LARGE_YREG: \
(decode_pc)++; \
break; \
\
default: \
fprintf(stderr, "unknown compact term type: %i\n", ((first_byte) & 0xF)); \
AVM_ABORT(); \
break; \
} \
}
#define DECODE_EXTENDED_LIST_TAG(decode_pc) \
{ \
if ((*(decode_pc)++) != COMPACT_EXTENDED_LIST) { \
fprintf(stderr, "Unexpected operand, expected a list, got %x\n", (decode_pc)[-1]);\
AVM_ABORT(); \
} \
}
#define DECODE_NIL(decode_pc) \
{ \
if ((*(decode_pc)++) != COMPACT_ATOM) { \
fprintf(stderr, "Unexpected operand, expected nil, got %x\n", (decode_pc)[-1]); \
AVM_ABORT(); \
} \
}
#ifdef ENABLE_TRACE
#define DECODE_DEST_REGISTER(dreg, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
uint8_t reg_type = first_byte & 0xF; \
(dreg).reg_type = reg_type; \
switch (reg_type) { \
case COMPACT_XREG: \
case COMPACT_YREG: \
(dreg).index = first_byte >> 4; \
break; \
case COMPACT_LARGE_XREG: \
case COMPACT_LARGE_YREG: \
(dreg).index = (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
break; \
default: \
AVM_ABORT(); \
} \
}
#define DECODE_DEST_REGISTER_GC_SAFE(dreg, decode_pc) \
DECODE_DEST_REGISTER(dreg, decode_pc)
#else
#define DECODE_DEST_REGISTER(dreg, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
uint8_t reg_type = first_byte & 0xF; \
switch (reg_type) { \
case COMPACT_XREG: \
case COMPACT_YREG: \
break; \
case COMPACT_LARGE_XREG: \
case COMPACT_LARGE_YREG: \
(decode_pc)++; \
break; \
default: \
AVM_ABORT(); \
} \
}
#define DECODE_DEST_REGISTER_GC_SAFE(dreg, decode_pc) \
DECODE_DEST_REGISTER(dreg, decode_pc)
#endif
#define DECODE_FP_REGISTER(freg, decode_pc) \
{ \
if ((*(decode_pc)++) != COMPACT_EXTENDED_FP_REGISTER) { \
fprintf(stderr, "Unexpected operand, expected an fp register, got %x\n", (decode_pc)[-1]); \
AVM_ABORT(); \
} \
DECODE_LITERAL(freg, decode_pc); \
if (freg > MAX_REG) { \
fprintf(stderr, "FP register index %d > MAX_REG = %d\n", freg, MAX_REG); \
AVM_ABORT(); \
} \
}
#define DECODE_VALUE32(val, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
val = first_byte >> 4; \
break; \
\
case 1: \
val = ((first_byte & 0xE0) << 3) | *(decode_pc)++; \
break; \
\
case 3: { \
uint8_t sz = (first_byte >> 5) + 2; \
if (sz > 4) { \
fprintf(stderr, "Unexpected operand, expected a literal of at most 4 bytes\n"); \
AVM_ABORT(); \
} \
val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
}
#define DECODE_VALUE64(val, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
val = first_byte >> 4; \
break; \
\
case 1: \
val = ((first_byte & 0xE0) << 3) | *(decode_pc)++; \
break; \
\
case 3: { \
uint8_t sz = (first_byte >> 5) + 2; \
if (sz > 8) { \
fprintf(stderr, "Unexpected operand, expected a literal of at most 8 bytes\n"); \
AVM_ABORT(); \
} \
val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
break; \
} \
} \
}
#define DECODE_ATOM(atom, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_ATOM)) { \
fprintf(stderr, "Unexpected operand, expected an atom (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
uint32_t atom_ix; \
DECODE_VALUE32(atom_ix, decode_pc); \
atom = module_get_atom_term_by_id(mod, atom_ix); \
}
#define DECODE_LABEL(label, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_LABEL)) { \
fprintf(stderr, "Unexpected operand, expected a label (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
DECODE_VALUE32(label, decode_pc); \
}
#define DECODE_ATOM_OR_LABEL(atom, label, decode_pc) \
{ \
if ((*(decode_pc) & 0x7) != COMPACT_ATOM) { \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_LABEL)) { \
fprintf(stderr, "Unexpected operand, expected an atom or label (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
atom = term_invalid_term(); \
DECODE_VALUE32(label, decode_pc); \
} else { \
uint32_t atom_ix; \
DECODE_VALUE32(atom_ix, decode_pc); \
atom = module_get_atom_term_by_id(mod, atom_ix); \
} \
}
#define DECODE_LITERAL(literal, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_LITERAL)) { \
fprintf(stderr, "Unexpected operand, expected a literal (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
DECODE_VALUE32(literal, decode_pc); \
}
#define DECODE_INTEGER(integer, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_INTEGER)) { \
fprintf(stderr, "Unexpected operand, expected an integer (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
DECODE_VALUE64(integer, decode_pc); \
}
#define DECODE_XREG(reg, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_XREG)) { \
fprintf(stderr, "Unexpected operand, expected an xreg (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
DECODE_VALUE32(reg, decode_pc); \
if (reg > MAX_REG) { \
fprintf(stderr, "Register index %d > MAX_REG = %d\n", reg, MAX_REG); \
AVM_ABORT(); \
} \
}
#define DECODE_YREG(reg, decode_pc) \
{ \
if (UNLIKELY((*(decode_pc) & 0x7) != COMPACT_YREG)) { \
fprintf(stderr, "Unexpected operand, expected a yreg (%x)\n", *(decode_pc)); \
AVM_ABORT(); \
} \
DECODE_VALUE32(reg, decode_pc); \
}
#define DECODE_ALLOCATOR_LIST(need, decode_pc) \
if (IS_EXTENDED_ALLOCATOR(decode_pc)) { \
need = 0; \
(decode_pc)++; /* skip list tag */ \
uint32_t list_size; \
DECODE_LITERAL(list_size, (decode_pc)); \
uint32_t allocator_tag; \
uint32_t allocator_size; \
for (uint32_t j = 0; j < list_size; j++) { \
DECODE_LITERAL(allocator_tag, (decode_pc)); \
DECODE_LITERAL(allocator_size, (decode_pc)); \
if (allocator_tag == COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FLOATS) { \
allocator_size *= FLOAT_SIZE; \
} else if (allocator_tag == COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FUNS) { \
allocator_size *= BOXED_FUN_SIZE; \
} \
need += allocator_size; \
} \
} else { \
DECODE_LITERAL(need, decode_pc); \
}
#endif
#ifdef IMPL_EXECUTE_LOOP
// If GC can be performed between decoding of register and accessing it,
// GC_SAFE variant must be used
typedef term * dreg_t;
typedef struct
{
term *base;
int index;
} dreg_gc_safe_t;
#define X_REG_FLAG 1
static inline term *with_x_reg_flag(term *xptr)
{
return (term *) (((uintptr_t) xptr) | X_REG_FLAG);
}
static inline bool has_x_reg_flag(term *xptr)
{
return ((uintptr_t) xptr) & X_REG_FLAG;
}
static inline term *to_x_reg_ptr(term *xptr)
{
return (term *) (((uintptr_t) xptr) & ~((uintptr_t) X_REG_FLAG));
}
static dreg_t extended_register_ptr(Context *ctx, unsigned int index)
{
struct ListHead *item;
LIST_FOR_EACH (item, &ctx->extended_x_regs) {
struct ExtendedRegister *ext_reg = GET_LIST_ENTRY(item, struct ExtendedRegister, head);
if (ext_reg->index == index) {
return &ext_reg->value;
}
}
struct ExtendedRegister *new_ext_reg = malloc(sizeof(struct ExtendedRegister));
new_ext_reg->index = index;
new_ext_reg->value = term_nil();
list_append(&ctx->extended_x_regs, &new_ext_reg->head);
return &new_ext_reg->value;
}
static void destroy_extended_registers(Context *ctx, unsigned int live)
{
struct ListHead *item;
struct ListHead *tmp;
MUTABLE_LIST_FOR_EACH (item, tmp, &ctx->extended_x_regs) {
struct ExtendedRegister *ext_reg = GET_LIST_ENTRY(item, struct ExtendedRegister, head);
if (ext_reg->index >= live) {
list_remove(item);
free(ext_reg);
}
}
}
#define READ_ANY_XREG(out_term, reg_index) \
{ \
if (LIKELY(reg_index < MAX_REG)) { \
out_term = x_regs[reg_index]; \
} else { \
dreg_t reg = extended_register_ptr(ctx, reg_index); \
out_term = *reg; \
} \
}
#define TRIM_LIVE_REGS(live_regs_no) \
if (UNLIKELY(!list_is_empty(&ctx->extended_x_regs))) { \
destroy_extended_registers(ctx, live_regs_no); \
} \
if (UNLIKELY(live_regs_no > MAX_REG)) { \
live_regs_no = MAX_REG; \
}
#define DEST_REGISTER(reg) dreg_t reg
#define GC_SAFE_DEST_REGISTER(reg) dreg_gc_safe_t reg
// TODO: fix register type heuristics, there is a chance that 'y' might be an "extended" x reg
#define T_DEST_REG(dreg) \
((dreg) >= x_regs && (dreg) < x_regs + MAX_REG) ? 'x' : 'y', \
(int) (((dreg) >= x_regs && (dreg) < x_regs + MAX_REG) ? ((dreg) - x_regs) : ((dreg) - ctx->e))
// TODO: fix register type heuristics, there is a chance that 'y' might be an "extended" x reg
#define T_DEST_REG_GC_SAFE(dreg_gc_safe) \
(has_x_reg_flag((dreg).base) ? 'x' : 'y'), ((dreg).index)
#define DECODE_COMPACT_TERM(dest_term, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
switch (first_byte & 0xF) { \
case COMPACT_LARGE_LITERAL: \
case COMPACT_LITERAL: \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
dest_term = term_from_int4(first_byte >> 4); \
break; \
\
case 1: \
dest_term = term_from_int(((first_byte & 0xE0) << 3) | *(decode_pc)++); \
break; \
\
case 3: { \
uint8_t sz = (first_byte >> 5) + 2; \
avm_int_t val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
dest_term = term_from_int(val); \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
break; \
\
case COMPACT_INTEGER: \
dest_term = term_from_int4(first_byte >> 4); \
break; \
\
case COMPACT_ATOM: \
if (first_byte == COMPACT_ATOM) { \
dest_term = term_nil(); \
} else { \
dest_term = module_get_atom_term_by_id(mod, first_byte >> 4); \
} \
break; \
\
case COMPACT_XREG: \
dest_term = x_regs[first_byte >> 4]; \
break; \
\
case COMPACT_YREG: \
dest_term = ctx->e[first_byte >> 4]; \
break; \
\
case COMPACT_EXTENDED: \
switch (first_byte) { \
case COMPACT_EXTENDED_LITERAL: { \
uint8_t first_extended_byte = *(decode_pc)++; \
switch (((first_extended_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
dest_term = module_load_literal(mod, first_extended_byte >> 4, ctx); \
break; \
case 1: { \
uint8_t byte_1 = *(decode_pc)++; \
uint16_t index = (((uint16_t) first_extended_byte & 0xE0) << 3) | byte_1; \
dest_term = module_load_literal(mod, index, ctx); \
break; \
} \
case 3: { \
uint8_t sz = (first_extended_byte >> 5) + 2; \
avm_int_t val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
dest_term = module_load_literal(mod, val, ctx); \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
if (UNLIKELY(term_is_invalid_term(dest_term))) { \
RAISE_ERROR(OUT_OF_MEMORY_ATOM); \
} \
\
break; \
} \
case COMPACT_EXTENDED_TYPED_REGISTER: { \
uint8_t reg_byte = *(decode_pc)++; \
switch (reg_byte & 0x0F) { \
case COMPACT_XREG: \
dest_term = x_regs[reg_byte >> 4]; \
break; \
case COMPACT_YREG: \
dest_term = ctx->e[reg_byte >> 4]; \
break; \
case COMPACT_LARGE_XREG: \
if (LIKELY((reg_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
unsigned int reg_index = (((reg_byte & 0xE0) << 3) | *(decode_pc)++); \
dreg_t ext_reg = extended_register_ptr(ctx, reg_index); \
if (IS_NULL_PTR(ext_reg)) { \
RAISE_ERROR(OUT_OF_MEMORY_ATOM); \
} \
dest_term = *ext_reg; \
} else { \
VM_ABORT(); \
} \
break; \
case COMPACT_LARGE_YREG: \
if (LIKELY((reg_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
dest_term = ctx->e[((reg_byte & 0xE0) << 3) | *(decode_pc)++]; \
} else { \
VM_ABORT(); \
} \
break; \
default: \
VM_ABORT(); \
} \
int type_index; \
DECODE_LITERAL(type_index, decode_pc) \
break; \
} \
default: \
VM_ABORT(); \
break; \
} \
break; \
\
case COMPACT_LARGE_ATOM: \
switch (first_byte & COMPACT_LARGE_IMM_MASK) { \
case COMPACT_11BITS_VALUE: \
dest_term = module_get_atom_term_by_id(mod, ((first_byte & 0xE0) << 3) | *(decode_pc)++); \
break; \
\
default: \
VM_ABORT(); \
break; \
} \
break; \
\
case COMPACT_LARGE_INTEGER: \
switch (first_byte & COMPACT_LARGE_IMM_MASK) { \
case COMPACT_11BITS_VALUE: \
dest_term = term_from_int11(((first_byte & 0xE0) << 3) | *(decode_pc)++); \
break; \
\
case COMPACT_NBITS_VALUE: { \
size_t num_bytes = (first_byte >> 5) + 2; \
dest_term = large_integer_to_term(ctx, num_bytes, decode_pc); \
if (UNLIKELY(term_is_invalid_term(dest_term))) { \
HANDLE_ERROR(); \
} \
(decode_pc) += num_bytes; \
break; \
} \
default: \
VM_ABORT(); \
break; \
} \
break; \
\
case COMPACT_LARGE_XREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
unsigned int reg_index = (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
dreg_t ext_reg = extended_register_ptr(ctx, reg_index); \
if (IS_NULL_PTR(ext_reg)) { \
RAISE_ERROR(OUT_OF_MEMORY_ATOM); \
} \
dest_term = *ext_reg; \
} else { \
VM_ABORT(); \
} \
break; \
\
case COMPACT_LARGE_YREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
dest_term = ctx->e[((first_byte & 0xE0) << 3) | *(decode_pc)++]; \
} else { \
VM_ABORT(); \
} \
break; \
\
default: \
VM_ABORT(); \
} \
}
#define READ_DEST_REGISTER(dreg) *(dreg)
#define READ_DEST_REGISTER_GC_SAFE(dreg_gc_safe) \
(has_x_reg_flag((dreg_gc_safe).base) ? \
*to_x_reg_ptr((dreg_gc_safe).base) : \
ctx->e[(dreg_gc_safe).index])
#define WRITE_REGISTER(dreg, value) \
{ \
*dreg = value; \
}
#define WRITE_REGISTER_GC_SAFE(dreg_gc_safe, value) \
{ \
if (has_x_reg_flag((dreg_gc_safe).base)) { \
*(to_x_reg_ptr((dreg_gc_safe).base)) = value; \
} else { \
ctx->e[(dreg_gc_safe).index] = value; \
} \
}
#define DECODE_EXTENDED_LIST_TAG(decode_pc) \
{ \
decode_pc++; \
}
#define DECODE_NIL(decode_pc) \
{ \
decode_pc++; \
}
#define DECODE_DEST_REGISTER(dreg, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
uint8_t reg_type = first_byte & 0xF; \
uint8_t reg_index = (first_byte >> 4); \
switch (reg_type) { \
case COMPACT_XREG: \
(dreg) = x_regs + reg_index; \
break; \
case COMPACT_YREG: \
(dreg) = ctx->e + reg_index; \
break; \
case COMPACT_LARGE_XREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
unsigned int reg_index = (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
dreg_t ext_reg = extended_register_ptr(ctx, reg_index); \
if (IS_NULL_PTR(ext_reg)) { \
RAISE_ERROR(OUT_OF_MEMORY_ATOM); \
} \
dreg = ext_reg; \
} else { \
VM_ABORT(); \
} \
break; \
case COMPACT_LARGE_YREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
(dreg) = ctx->e + (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
} else { \
VM_ABORT(); \
} \
break; \
default: \
VM_ABORT(); \
} \
}
// NOTE: (dreg_gc_safe).index is initialized for x registers even if not used to avoid compiler
// warnings about unitialized variables (-maybe-uninitialized)
#define DECODE_DEST_REGISTER_GC_SAFE(dreg_gc_safe, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
uint8_t reg_type = first_byte & 0xF; \
uint8_t reg_index = (first_byte >> 4); \
switch (reg_type) { \
case COMPACT_XREG: \
(dreg_gc_safe).base = with_x_reg_flag(&x_regs[reg_index]); \
(dreg_gc_safe).index = reg_index; \
break; \
case COMPACT_YREG: \
(dreg_gc_safe).base = ctx->e; \
(dreg_gc_safe).index = reg_index; \
break; \
case COMPACT_LARGE_XREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
unsigned int reg_index = (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
dreg_t reg_base = extended_register_ptr(ctx, reg_index); \
if (IS_NULL_PTR(reg_base)) { \
RAISE_ERROR(OUT_OF_MEMORY_ATOM); \
} \
(dreg_gc_safe).base = with_x_reg_flag(reg_base); \
(dreg_gc_safe).index = reg_index; \
} else { \
VM_ABORT(); \
} \
break; \
case COMPACT_LARGE_YREG: \
if (LIKELY((first_byte & COMPACT_LARGE_IMM_MASK) == COMPACT_11BITS_VALUE)) { \
(dreg_gc_safe).base = ctx->e; \
(dreg_gc_safe).index = (((first_byte & 0xE0) << 3) | *(decode_pc)++); \
} else { \
VM_ABORT(); \
} \
break; \
default: \
VM_ABORT(); \
} \
}
// MAX_REG is enforced at decode time
#if MAX_REG <= 16
#define DECODE_FP_REGISTER(freg, decode_pc) \
{ \
(decode_pc)++; \
uint8_t first_byte = *(decode_pc)++; \
freg = first_byte >> 4; \
}
#else
#define DECODE_FP_REGISTER(freg, decode_pc) \
{ \
(decode_pc)++; \
DECODE_LITERAL(freg, decode_pc); \
}
#endif
#define DECODE_VALUE(val, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
switch (((first_byte) >> 3) & 0x3) { \
case 0: \
case 2: \
val = first_byte >> 4; \
break; \
\
case 1: \
val = ((first_byte & 0xE0) << 3) | *(decode_pc)++; \
break; \
\
case 3: { \
uint8_t sz = (first_byte >> 5) + 2; \
val = 0; \
for (uint8_t vi = 0; vi < sz; vi++) { \
val <<= 8; \
val |= *(decode_pc)++; \
} \
break; \
} \
default: UNREACHABLE(); /* help gcc 8.4 */ \
} \
}
#define DECODE_ATOM(atom, decode_pc) \
{ \
uint32_t atom_ix; \
DECODE_VALUE(atom_ix, decode_pc); \
atom = module_get_atom_term_by_id(mod, atom_ix); \
}
#define DECODE_LABEL(label, decode_pc) \
DECODE_VALUE(label, decode_pc)
#define DECODE_ATOM_OR_LABEL(atom, label, decode_pc) \
{ \
if ((*(decode_pc) & 0x7) != COMPACT_ATOM) { \
atom = term_invalid_term(); \
DECODE_VALUE(label, decode_pc); \
} else { \
uint32_t atom_ix; \
DECODE_VALUE(atom_ix, decode_pc); \
atom = module_get_atom_term_by_id(mod, atom_ix); \
} \
}
#define DECODE_LITERAL(val, decode_pc) \
DECODE_VALUE(val, decode_pc)
#define DECODE_INTEGER(integer, decode_pc) \
DECODE_VALUE(integer, decode_pc)
// MAX_REG is enforced at decode time
#if MAX_REG <= 16
#define DECODE_XREG(reg, decode_pc) \
{ \
uint8_t first_byte = *(decode_pc)++; \
reg = first_byte >> 4; \
}
#else
#define DECODE_XREG(reg, decode_pc) \
DECODE_VALUE(reg, decode_pc)
#endif
#define DECODE_YREG(reg, decode_pc) \
DECODE_VALUE(reg, decode_pc)
#define DECODE_ALLOCATOR_LIST(need, decode_pc) \
if (IS_EXTENDED_ALLOCATOR(decode_pc)) { \
need = 0; \
(decode_pc)++; /* skip list tag */ \
uint32_t list_size; \
DECODE_LITERAL(list_size, decode_pc); \
uint32_t allocator_tag; \
uint32_t allocator_size; \
for (uint32_t j = 0; j < list_size; j++) { \
DECODE_LITERAL(allocator_tag, decode_pc); \
DECODE_LITERAL(allocator_size, decode_pc); \
if (allocator_tag == COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FLOATS) { \
allocator_size *= FLOAT_SIZE; \
} else if (allocator_tag == COMPACT_EXTENDED_ALLOCATOR_LIST_TAG_FUNS) { \
allocator_size *= BOXED_FUN_SIZE; \
} \
need += allocator_size; \
} \
} else { \
DECODE_LITERAL(need, decode_pc); \
}
#endif
#define IS_EXTENDED_ALLOCATOR(decode_pc) \
(*decode_pc) == COMPACT_EXTENDED_ALLOCATION_LIST
#define IS_EXTENDED_FP_REGISTER(decode_pc) \
(*decode_pc) == COMPACT_EXTENDED_FP_REGISTER
#define JUMP_TO_LABEL(module, label) \
if (module != mod) { \
prev_mod = mod; \
mod = module; \
code = mod->code->code; \
} \