/* * 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_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 #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_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 static inline void flush_icache_range(uintptr_t start, uintptr_t stop) { } /* 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) static inline void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } #ifdef CONFIG_SOFTMMU #define TCG_TARGET_NEED_LDST_LABELS #endif #endif /* TCG_TARGET_H */