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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2009, 2011 Stefan Weil
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*
* This code implements a TCG which does not generate machine code for some
* real target machine but which generates virtual machine code for an
* interpreter. Interpreted pseudo code is slow, but it works on any host.
*
* Some remarks might help in understanding the code:
*
* "target" or "TCG target" is the machine which runs the generated code.
* This is different to the usual meaning in QEMU where "target" is the
* emulated machine. So normally QEMU host is identical to TCG target.
* Here the TCG target is a virtual machine, but this virtual machine must
* use the same word size like the real machine.
* Therefore, we need both 32 and 64 bit virtual machines (interpreter).
*/
#ifndef TCG_TARGET_H
#define TCG_TARGET_H
#define TCG_TARGET_INTERPRETER 1
#define TCG_TARGET_INSN_UNIT_SIZE 1
#define TCG_TARGET_TLB_DISPLACEMENT_BITS 32
#if UINTPTR_MAX == UINT32_MAX
# define TCG_TARGET_REG_BITS 32
#elif UINTPTR_MAX == UINT64_MAX
# define TCG_TARGET_REG_BITS 64
#else
# error Unknown pointer size for tci target
#endif
#ifdef CONFIG_DEBUG_TCG
/* Enable debug output. */
#define CONFIG_DEBUG_TCG_INTERPRETER
#endif
/* Optional instructions. */
#define TCG_TARGET_HAS_bswap16_i32 1
#define TCG_TARGET_HAS_bswap32_i32 1
#define TCG_TARGET_HAS_div_i32 1
#define TCG_TARGET_HAS_rem_i32 1
#define TCG_TARGET_HAS_ext8s_i32 1
#define TCG_TARGET_HAS_ext16s_i32 1
#define TCG_TARGET_HAS_ext8u_i32 1
#define TCG_TARGET_HAS_ext16u_i32 1
#define TCG_TARGET_HAS_andc_i32 0
#define TCG_TARGET_HAS_deposit_i32 1
#define TCG_TARGET_HAS_extract_i32 0
#define TCG_TARGET_HAS_sextract_i32 0
#define TCG_TARGET_HAS_extract2_i32 0
#define TCG_TARGET_HAS_eqv_i32 0
#define TCG_TARGET_HAS_nand_i32 0
#define TCG_TARGET_HAS_nor_i32 0
#define TCG_TARGET_HAS_clz_i32 0
#define TCG_TARGET_HAS_ctz_i32 0
#define TCG_TARGET_HAS_ctpop_i32 0
#define TCG_TARGET_HAS_neg_i32 1
#define TCG_TARGET_HAS_not_i32 1
#define TCG_TARGET_HAS_orc_i32 0
#define TCG_TARGET_HAS_rot_i32 1
#define TCG_TARGET_HAS_movcond_i32 0
#define TCG_TARGET_HAS_muls2_i32 0
#define TCG_TARGET_HAS_muluh_i32 0
#define TCG_TARGET_HAS_mulsh_i32 0
#define TCG_TARGET_HAS_goto_ptr 0
#define TCG_TARGET_HAS_direct_jump 1
#define TCG_TARGET_HAS_qemu_st8_i32 0
#if TCG_TARGET_REG_BITS == 64
#define TCG_TARGET_HAS_extrl_i64_i32 0
#define TCG_TARGET_HAS_extrh_i64_i32 0
#define TCG_TARGET_HAS_bswap16_i64 1
#define TCG_TARGET_HAS_bswap32_i64 1
#define TCG_TARGET_HAS_bswap64_i64 1
#define TCG_TARGET_HAS_deposit_i64 1
#define TCG_TARGET_HAS_extract_i64 0
#define TCG_TARGET_HAS_sextract_i64 0
#define TCG_TARGET_HAS_extract2_i64 0
#define TCG_TARGET_HAS_div_i64 0
#define TCG_TARGET_HAS_rem_i64 0
#define TCG_TARGET_HAS_ext8s_i64 1
#define TCG_TARGET_HAS_ext16s_i64 1
#define TCG_TARGET_HAS_ext32s_i64 1
#define TCG_TARGET_HAS_ext8u_i64 1
#define TCG_TARGET_HAS_ext16u_i64 1
#define TCG_TARGET_HAS_ext32u_i64 1
#define TCG_TARGET_HAS_andc_i64 0
#define TCG_TARGET_HAS_eqv_i64 0
#define TCG_TARGET_HAS_nand_i64 0
#define TCG_TARGET_HAS_nor_i64 0
#define TCG_TARGET_HAS_clz_i64 0
#define TCG_TARGET_HAS_ctz_i64 0
#define TCG_TARGET_HAS_ctpop_i64 0
#define TCG_TARGET_HAS_neg_i64 1
#define TCG_TARGET_HAS_not_i64 1
#define TCG_TARGET_HAS_orc_i64 0
#define TCG_TARGET_HAS_rot_i64 1
#define TCG_TARGET_HAS_movcond_i64 0
#define TCG_TARGET_HAS_muls2_i64 0
#define TCG_TARGET_HAS_add2_i32 0
#define TCG_TARGET_HAS_sub2_i32 0
#define TCG_TARGET_HAS_mulu2_i32 0
#define TCG_TARGET_HAS_add2_i64 0
#define TCG_TARGET_HAS_sub2_i64 0
#define TCG_TARGET_HAS_mulu2_i64 0
#define TCG_TARGET_HAS_muluh_i64 0
#define TCG_TARGET_HAS_mulsh_i64 0
#else
#define TCG_TARGET_HAS_mulu2_i32 1
#endif /* TCG_TARGET_REG_BITS == 64 */
/* Number of registers available.
For 32 bit hosts, we need more than 8 registers (call arguments). */
/* #define TCG_TARGET_NB_REGS 8 */
#define TCG_TARGET_NB_REGS 16
/* #define TCG_TARGET_NB_REGS 32 */
/* List of registers which are used by TCG. */
typedef enum {
TCG_REG_R0 = 0,
TCG_REG_R1,
TCG_REG_R2,
TCG_REG_R3,
TCG_REG_R4,
TCG_REG_R5,
TCG_REG_R6,
TCG_REG_R7,
#if TCG_TARGET_NB_REGS >= 16
TCG_REG_R8,
TCG_REG_R9,
TCG_REG_R10,
TCG_REG_R11,
TCG_REG_R12,
TCG_REG_R13,
TCG_REG_R14,
TCG_REG_R15,
#if TCG_TARGET_NB_REGS >= 32
TCG_REG_R16,
TCG_REG_R17,
TCG_REG_R18,
TCG_REG_R19,
TCG_REG_R20,
TCG_REG_R21,
TCG_REG_R22,
TCG_REG_R23,
TCG_REG_R24,
TCG_REG_R25,
TCG_REG_R26,
TCG_REG_R27,
TCG_REG_R28,
TCG_REG_R29,
TCG_REG_R30,
TCG_REG_R31,
#endif
#endif
/* Special value UINT8_MAX is used by TCI to encode constant values. */
TCG_CONST = UINT8_MAX
} TCGReg;
#define TCG_AREG0 (TCG_TARGET_NB_REGS - 2)
/* Used for function call generation. */
#define TCG_REG_CALL_STACK (TCG_TARGET_NB_REGS - 1)
#define TCG_TARGET_CALL_STACK_OFFSET 0
#define TCG_TARGET_STACK_ALIGN 16
void tci_disas(uint8_t opc);
#define HAVE_TCG_QEMU_TB_EXEC
/* We could notice __i386__ or __s390x__ and reduce the barriers depending
on the host. But if you want performance, you use the normal backend.
We prefer consistency across hosts on this. */
#define TCG_TARGET_DEFAULT_MO (0)
#define TCG_TARGET_HAS_MEMORY_BSWAP 1
static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_rx,
uintptr_t jmp_rw, uintptr_t addr)
{
/* patch the branch destination */
qatomic_set((int32_t *)jmp_rw, addr - (jmp_rx + 4));
/* no need to flush icache explicitly */
}
#endif /* TCG_TARGET_H */
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