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Diffstat (limited to 'tcg/tci/tcg-target.h')
| -rw-r--r-- | tcg/tci/tcg-target.h | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/tcg/tci/tcg-target.h b/tcg/tci/tcg-target.h new file mode 100644 index 0000000000..81ded86959 --- /dev/null +++ b/tcg/tci/tcg-target.h @@ -0,0 +1,160 @@ +/* + * 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). + */ + +#if !defined(TCG_TARGET_H) +#define TCG_TARGET_H + +#include "config-host.h" + +#define TCG_TARGET_INTERPRETER 1 + +#ifdef CONFIG_DEBUG_TCG +/* Enable debug output. */ +#define CONFIG_DEBUG_TCG_INTERPRETER +#endif + +#if 0 /* TCI tries to emulate a little endian host. */ +#if defined(HOST_WORDS_BIGENDIAN) +# define TCG_TARGET_WORDS_BIGENDIAN +#endif +#endif + +/* Optional instructions. */ + +#define TCG_TARGET_HAS_bswap16_i32 1 +#define TCG_TARGET_HAS_bswap32_i32 1 +/* Not more than one of the next two defines must be 1. */ +#define TCG_TARGET_HAS_div_i32 1 +#define TCG_TARGET_HAS_div2_i32 0 +#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 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_neg_i32 1 +#define TCG_TARGET_HAS_not_i32 1 +#define TCG_TARGET_HAS_orc_i32 0 +#define TCG_TARGET_HAS_rot_i32 1 + +#if TCG_TARGET_REG_BITS == 64 +#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 0 +/* Not more than one of the next two defines must be 1. */ +#define TCG_TARGET_HAS_div_i64 0 +#define TCG_TARGET_HAS_div2_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_neg_i64 1 +#define TCG_TARGET_HAS_not_i64 1 +#define TCG_TARGET_HAS_orc_i64 0 +#define TCG_TARGET_HAS_rot_i64 1 +#endif /* TCG_TARGET_REG_BITS == 64 */ + +/* Offset to user memory in user mode. */ +#define TCG_TARGET_HAS_GUEST_BASE + +/* 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, + TCG_AREG0 = 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 +} TCGRegister; + +void tci_disas(uint8_t opc); + +unsigned long tcg_qemu_tb_exec(CPUState *env, uint8_t *tb_ptr); +#define tcg_qemu_tb_exec tcg_qemu_tb_exec + +#endif /* TCG_TARGET_H */ |