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qb_op.c
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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Chung Leong <cleong@cal.berkeley.edu> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "qb.h"
extern const qb_op_info global_op_info[];
extern const char *global_operand_codes[];
uint32_t qb_get_op_flags(qb_opcode opcode) {
const qb_op_info *op = &global_op_info[opcode];
return op->flags;
}
uint32_t qb_get_operand_count(qb_opcode opcode) {
const qb_op_info *op = &global_op_info[opcode];
const char *codes = op->instruction_format;
return (uint32_t) strlen(codes);
}
uint32_t qb_get_instruction_length(qb_opcode opcode) {
const qb_op_info *op = &global_op_info[opcode];
uint32_t length = op->instruction_length;
return length;
}
qb_address_mode qb_get_operand_address_mode(uint32_t opcode, uint32_t operand_index) {
const qb_op_info *op = &global_op_info[opcode];
const char *codes = op->instruction_format;
char code = codes[operand_index];
switch(code) {
case 'S':
case 's':
return QB_ADDRESS_MODE_SCA;
case 'E':
case 'e':
return QB_ADDRESS_MODE_ELE;
case 'A':
case 'a':
case 'X':
case 'x':
return QB_ADDRESS_MODE_ARR;
case 'c':
return QB_ADDRESS_MODE_SCA;
}
return -1;
}
int32_t qb_is_operand_write_target(qb_opcode opcode, uint32_t operand_index) {
const qb_op_info *op = &global_op_info[opcode];
const char *codes = op->instruction_format;
char code = codes[operand_index];
switch(code) {
case 'S':
case 'E':
case 'A':
case 'X':
return TRUE;
}
return FALSE;
}
int32_t qb_is_operand_complex(qb_opcode opcode, uint32_t operand_index) {
const qb_op_info *op = &global_op_info[opcode];
const char *codes = op->instruction_format;
char code = codes[operand_index];
switch(code) {
case 'X':
case 'x':
return TRUE;
}
return FALSE;
}
const char *qb_get_op_format(uint32_t opcode) {
const qb_op_info *op = &global_op_info[opcode];
return op->instruction_format;
}
static qb_opcode switch_opcodes[8][8] =
{
{ QB_SWITCH8_I64_I64, QB_SWITCH8_I64_I64, QB_SWITCH8_I32_I32, QB_SWITCH8_I32_I32, QB_SWITCH8_I16_I16, QB_SWITCH8_I16_I16, QB_SWITCH8_I08_I08, QB_SWITCH8_I08_I08 },
{ QB_SWITCH16_I64_I64, QB_SWITCH16_I64_I64, QB_SWITCH16_I32_I32, QB_SWITCH16_I32_I32, QB_SWITCH16_I16_I16, QB_SWITCH16_I16_I16, QB_SWITCH16_I08_I08, QB_SWITCH16_I08_I08 },
{ QB_SWITCH32_I64_I64, QB_SWITCH32_I64_I64, QB_SWITCH32_I32_I32, QB_SWITCH32_I32_I32, QB_SWITCH32_I16_I16, QB_SWITCH32_I16_I16, QB_SWITCH32_I08_I08, QB_SWITCH32_I08_I08 },
{ QB_SWITCH64_I64_I64, QB_SWITCH64_I64_I64, QB_SWITCH64_I32_I32, QB_SWITCH64_I32_I32, QB_SWITCH64_I16_I16, QB_SWITCH64_I16_I16, QB_SWITCH64_I08_I08, QB_SWITCH64_I08_I08 },
{ QB_SWITCH128_I64_I64, QB_SWITCH128_I64_I64, QB_SWITCH128_I32_I32, QB_SWITCH128_I32_I32, QB_SWITCH128_I16_I16, QB_SWITCH128_I16_I16, QB_SWITCH128_I08_I08, QB_SWITCH128_I08_I08 },
{ QB_SWITCH256_I64_I64, QB_SWITCH256_I64_I64, QB_SWITCH256_I32_I32, QB_SWITCH256_I32_I32, QB_SWITCH256_I16_I16, QB_SWITCH256_I16_I16, QB_SWITCH256_I08_I08, QB_SWITCH256_I08_I08 },
{ QB_SWITCH512_I64_I64, QB_SWITCH512_I64_I64, QB_SWITCH512_I32_I32, QB_SWITCH512_I32_I32, QB_SWITCH512_I16_I16, QB_SWITCH512_I16_I16, QB_SWITCH512_I08_I08, QB_SWITCH512_I08_I08 },
{ QB_SWITCH1024_I64_I64, QB_SWITCH1024_I64_I64, QB_SWITCH1024_I32_I32, QB_SWITCH1024_I32_I32, QB_SWITCH1024_I16_I16, QB_SWITCH1024_I16_I16, QB_SWITCH1024_I08_I08, QB_SWITCH1024_I08_I08 },
};
static uint32_t switch_table_sizes[8] = { 8, 16, 32, 64, 128, 256, 512, 1024 };
static uint32_t qb_get_switch_table_index(uint32_t case_count) {
uint32_t i;
for(i = 0; i < sizeof(switch_table_sizes) / sizeof(switch_table_sizes[0]); i++) {
uint32_t size = switch_table_sizes[i];
if(case_count < size) {
return i;
}
}
return (uint32_t) -1;
}
uint32_t qb_get_switch_table_size(uint32_t case_count) {
uint32_t index = qb_get_switch_table_index(case_count);
return switch_table_sizes[index] + 1;
}
qb_opcode qb_get_switch_opcode(uint32_t case_count, qb_primitive_type type) {
uint32_t index = qb_get_switch_table_index(case_count);
qb_opcode *opcodes = switch_opcodes[index];
return opcodes[type];
}
uint32_t qb_get_switch_table_size_from_opcode(qb_opcode opcode) {
uint32_t i, j;
for(i = 0; sizeof(switch_table_sizes) / sizeof(switch_table_sizes[0]); i++) {
qb_opcode *opcodes = switch_opcodes[i];
for(j = 0; j < 8; j++) {
if(opcodes[j] == opcode) {
return switch_table_sizes[i] + 1;
}
}
}
return 0;
}