diff options
| -rw-r--r-- | py/emitnative.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/py/emitnative.c b/py/emitnative.c index 2a657b696..8cb5de1b4 100644 --- a/py/emitnative.c +++ b/py/emitnative.c @@ -211,6 +211,7 @@ struct _emit_t { int pass; bool do_viper_types; + bool prelude_offset_uses_u16_encoding; mp_uint_t local_vtype_alloc; vtype_kind_t *local_vtype; @@ -339,6 +340,18 @@ STATIC void emit_native_mov_reg_qstr_obj(emit_t *emit, int reg_dest, qstr qst) { emit_native_mov_state_reg((emit), (local_num), (reg_temp)); \ } while (false) +#define emit_native_mov_state_imm_fix_u16_via(emit, local_num, imm, reg_temp) \ + do { \ + ASM_MOV_REG_IMM_FIX_U16((emit)->as, (reg_temp), (imm)); \ + emit_native_mov_state_reg((emit), (local_num), (reg_temp)); \ + } while (false) + +#define emit_native_mov_state_imm_fix_word_via(emit, local_num, imm, reg_temp) \ + do { \ + ASM_MOV_REG_IMM_FIX_WORD((emit)->as, (reg_temp), (imm)); \ + emit_native_mov_state_reg((emit), (local_num), (reg_temp)); \ + } while (false) + STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) { DEBUG_printf("start_pass(pass=%u, scope=%p)\n", pass, scope); @@ -549,16 +562,27 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop ASM_MOV_LOCAL_REG(emit->as, LOCAL_IDX_FUN_OBJ(emit), REG_PARENT_ARG_1); // Set code_state.ip (offset from start of this function to prelude info) + int code_state_ip_local = emit->code_state_start + OFFSETOF_CODE_STATE_IP; #if N_PRELUDE_AS_BYTES_OBJ // Prelude is a bytes object in const_table; store ip = prelude->data - fun_bc->bytecode ASM_LOAD_REG_REG_OFFSET(emit->as, REG_LOCAL_3, REG_LOCAL_3, emit->scope->num_pos_args + emit->scope->num_kwonly_args + 1); ASM_LOAD_REG_REG_OFFSET(emit->as, REG_LOCAL_3, REG_LOCAL_3, offsetof(mp_obj_str_t, data) / sizeof(uintptr_t)); ASM_LOAD_REG_REG_OFFSET(emit->as, REG_PARENT_ARG_1, REG_PARENT_ARG_1, OFFSETOF_OBJ_FUN_BC_BYTECODE); ASM_SUB_REG_REG(emit->as, REG_LOCAL_3, REG_PARENT_ARG_1); - emit_native_mov_state_reg(emit, emit->code_state_start + OFFSETOF_CODE_STATE_IP, REG_LOCAL_3); + emit_native_mov_state_reg(emit, code_state_ip_local, REG_LOCAL_3); #else - // TODO this encoding may change size in the final pass, need to make it fixed - emit_native_mov_state_imm_via(emit, emit->code_state_start + OFFSETOF_CODE_STATE_IP, emit->prelude_offset, REG_PARENT_ARG_1); + if (emit->pass == MP_PASS_CODE_SIZE) { + // Commit to the encoding size based on the value of prelude_offset in this pass. + // By using 32768 as the cut-off it is highly unlikely that prelude_offset will + // grow beyond 65535 by the end of thiss pass, and so require the larger encoding. + emit->prelude_offset_uses_u16_encoding = emit->prelude_offset < 32768; + } + if (emit->prelude_offset_uses_u16_encoding) { + assert(emit->prelude_offset <= 65535); + emit_native_mov_state_imm_fix_u16_via(emit, code_state_ip_local, emit->prelude_offset, REG_PARENT_ARG_1); + } else { + emit_native_mov_state_imm_fix_word_via(emit, code_state_ip_local, emit->prelude_offset, REG_PARENT_ARG_1); + } #endif // Set code_state.n_state (only works on little endian targets due to n_state being uint16_t) |