mirror of https://github.com/proxmox/mirror_qemu
1036 lines
33 KiB
C
1036 lines
33 KiB
C
/*
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* Tiny Code Generator for QEMU
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*
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* Copyright (c) 2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef TCG_H
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#define TCG_H
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#include "qemu-common.h"
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#include "qemu/bitops.h"
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#include "tcg-target.h"
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#define CPU_TEMP_BUF_NLONGS 128
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/* Default target word size to pointer size. */
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#ifndef TCG_TARGET_REG_BITS
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# if UINTPTR_MAX == UINT32_MAX
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# define TCG_TARGET_REG_BITS 32
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# elif UINTPTR_MAX == UINT64_MAX
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# define TCG_TARGET_REG_BITS 64
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# else
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# error Unknown pointer size for tcg target
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# endif
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#endif
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#if TCG_TARGET_REG_BITS == 32
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typedef int32_t tcg_target_long;
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typedef uint32_t tcg_target_ulong;
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#define TCG_PRIlx PRIx32
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#define TCG_PRIld PRId32
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#elif TCG_TARGET_REG_BITS == 64
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typedef int64_t tcg_target_long;
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typedef uint64_t tcg_target_ulong;
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#define TCG_PRIlx PRIx64
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#define TCG_PRIld PRId64
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#else
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#error unsupported
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#endif
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#if TCG_TARGET_NB_REGS <= 32
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typedef uint32_t TCGRegSet;
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#elif TCG_TARGET_NB_REGS <= 64
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typedef uint64_t TCGRegSet;
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#else
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#error unsupported
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#endif
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#if TCG_TARGET_REG_BITS == 32
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/* Turn some undef macros into false macros. */
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#define TCG_TARGET_HAS_extrl_i64_i32 0
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#define TCG_TARGET_HAS_extrh_i64_i32 0
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#define TCG_TARGET_HAS_div_i64 0
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#define TCG_TARGET_HAS_rem_i64 0
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#define TCG_TARGET_HAS_div2_i64 0
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#define TCG_TARGET_HAS_rot_i64 0
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#define TCG_TARGET_HAS_ext8s_i64 0
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#define TCG_TARGET_HAS_ext16s_i64 0
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#define TCG_TARGET_HAS_ext32s_i64 0
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#define TCG_TARGET_HAS_ext8u_i64 0
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#define TCG_TARGET_HAS_ext16u_i64 0
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#define TCG_TARGET_HAS_ext32u_i64 0
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#define TCG_TARGET_HAS_bswap16_i64 0
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#define TCG_TARGET_HAS_bswap32_i64 0
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#define TCG_TARGET_HAS_bswap64_i64 0
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#define TCG_TARGET_HAS_neg_i64 0
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#define TCG_TARGET_HAS_not_i64 0
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#define TCG_TARGET_HAS_andc_i64 0
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#define TCG_TARGET_HAS_orc_i64 0
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#define TCG_TARGET_HAS_eqv_i64 0
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#define TCG_TARGET_HAS_nand_i64 0
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#define TCG_TARGET_HAS_nor_i64 0
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#define TCG_TARGET_HAS_deposit_i64 0
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#define TCG_TARGET_HAS_movcond_i64 0
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#define TCG_TARGET_HAS_add2_i64 0
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#define TCG_TARGET_HAS_sub2_i64 0
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#define TCG_TARGET_HAS_mulu2_i64 0
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#define TCG_TARGET_HAS_muls2_i64 0
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#define TCG_TARGET_HAS_muluh_i64 0
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#define TCG_TARGET_HAS_mulsh_i64 0
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/* Turn some undef macros into true macros. */
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#define TCG_TARGET_HAS_add2_i32 1
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#define TCG_TARGET_HAS_sub2_i32 1
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#endif
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#ifndef TCG_TARGET_deposit_i32_valid
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#define TCG_TARGET_deposit_i32_valid(ofs, len) 1
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#endif
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#ifndef TCG_TARGET_deposit_i64_valid
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#define TCG_TARGET_deposit_i64_valid(ofs, len) 1
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#endif
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/* Only one of DIV or DIV2 should be defined. */
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#if defined(TCG_TARGET_HAS_div_i32)
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#define TCG_TARGET_HAS_div2_i32 0
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#elif defined(TCG_TARGET_HAS_div2_i32)
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#define TCG_TARGET_HAS_div_i32 0
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#define TCG_TARGET_HAS_rem_i32 0
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#endif
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#if defined(TCG_TARGET_HAS_div_i64)
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#define TCG_TARGET_HAS_div2_i64 0
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#elif defined(TCG_TARGET_HAS_div2_i64)
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#define TCG_TARGET_HAS_div_i64 0
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#define TCG_TARGET_HAS_rem_i64 0
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#endif
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/* For 32-bit targets, some sort of unsigned widening multiply is required. */
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#if TCG_TARGET_REG_BITS == 32 \
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&& !(defined(TCG_TARGET_HAS_mulu2_i32) \
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|| defined(TCG_TARGET_HAS_muluh_i32))
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# error "Missing unsigned widening multiply"
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#endif
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typedef enum TCGOpcode {
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#define DEF(name, oargs, iargs, cargs, flags) INDEX_op_ ## name,
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#include "tcg-opc.h"
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#undef DEF
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NB_OPS,
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} TCGOpcode;
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#define tcg_regset_clear(d) (d) = 0
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#define tcg_regset_set(d, s) (d) = (s)
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#define tcg_regset_set32(d, reg, val32) (d) |= (val32) << (reg)
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#define tcg_regset_set_reg(d, r) (d) |= 1L << (r)
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#define tcg_regset_reset_reg(d, r) (d) &= ~(1L << (r))
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#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
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#define tcg_regset_or(d, a, b) (d) = (a) | (b)
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#define tcg_regset_and(d, a, b) (d) = (a) & (b)
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#define tcg_regset_andnot(d, a, b) (d) = (a) & ~(b)
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#define tcg_regset_not(d, a) (d) = ~(a)
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#ifndef TCG_TARGET_INSN_UNIT_SIZE
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# error "Missing TCG_TARGET_INSN_UNIT_SIZE"
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#elif TCG_TARGET_INSN_UNIT_SIZE == 1
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typedef uint8_t tcg_insn_unit;
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#elif TCG_TARGET_INSN_UNIT_SIZE == 2
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typedef uint16_t tcg_insn_unit;
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#elif TCG_TARGET_INSN_UNIT_SIZE == 4
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typedef uint32_t tcg_insn_unit;
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#elif TCG_TARGET_INSN_UNIT_SIZE == 8
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typedef uint64_t tcg_insn_unit;
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#else
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/* The port better have done this. */
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#endif
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typedef struct TCGRelocation {
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struct TCGRelocation *next;
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int type;
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tcg_insn_unit *ptr;
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intptr_t addend;
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} TCGRelocation;
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typedef struct TCGLabel {
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unsigned has_value : 1;
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unsigned id : 31;
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union {
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uintptr_t value;
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tcg_insn_unit *value_ptr;
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TCGRelocation *first_reloc;
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} u;
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} TCGLabel;
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typedef struct TCGPool {
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struct TCGPool *next;
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int size;
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uint8_t data[0] __attribute__ ((aligned));
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} TCGPool;
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#define TCG_POOL_CHUNK_SIZE 32768
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#define TCG_MAX_TEMPS 512
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/* when the size of the arguments of a called function is smaller than
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this value, they are statically allocated in the TB stack frame */
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#define TCG_STATIC_CALL_ARGS_SIZE 128
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typedef enum TCGType {
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TCG_TYPE_I32,
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TCG_TYPE_I64,
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TCG_TYPE_COUNT, /* number of different types */
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/* An alias for the size of the host register. */
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#if TCG_TARGET_REG_BITS == 32
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TCG_TYPE_REG = TCG_TYPE_I32,
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#else
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TCG_TYPE_REG = TCG_TYPE_I64,
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#endif
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/* An alias for the size of the native pointer. */
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#if UINTPTR_MAX == UINT32_MAX
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TCG_TYPE_PTR = TCG_TYPE_I32,
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#else
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TCG_TYPE_PTR = TCG_TYPE_I64,
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#endif
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/* An alias for the size of the target "long", aka register. */
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#if TARGET_LONG_BITS == 64
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TCG_TYPE_TL = TCG_TYPE_I64,
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#else
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TCG_TYPE_TL = TCG_TYPE_I32,
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#endif
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} TCGType;
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/* Constants for qemu_ld and qemu_st for the Memory Operation field. */
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typedef enum TCGMemOp {
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MO_8 = 0,
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MO_16 = 1,
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MO_32 = 2,
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MO_64 = 3,
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MO_SIZE = 3, /* Mask for the above. */
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MO_SIGN = 4, /* Sign-extended, otherwise zero-extended. */
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MO_BSWAP = 8, /* Host reverse endian. */
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#ifdef HOST_WORDS_BIGENDIAN
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MO_LE = MO_BSWAP,
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MO_BE = 0,
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#else
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MO_LE = 0,
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MO_BE = MO_BSWAP,
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#endif
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#ifdef TARGET_WORDS_BIGENDIAN
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MO_TE = MO_BE,
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#else
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MO_TE = MO_LE,
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#endif
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/* MO_UNALN accesses are never checked for alignment.
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MO_ALIGN accesses will result in a call to the CPU's
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do_unaligned_access hook if the guest address is not aligned.
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The default depends on whether the target CPU defines ALIGNED_ONLY. */
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MO_AMASK = 16,
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#ifdef ALIGNED_ONLY
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MO_ALIGN = 0,
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MO_UNALN = MO_AMASK,
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#else
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MO_ALIGN = MO_AMASK,
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MO_UNALN = 0,
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#endif
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/* Combinations of the above, for ease of use. */
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MO_UB = MO_8,
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MO_UW = MO_16,
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MO_UL = MO_32,
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MO_SB = MO_SIGN | MO_8,
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MO_SW = MO_SIGN | MO_16,
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MO_SL = MO_SIGN | MO_32,
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MO_Q = MO_64,
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MO_LEUW = MO_LE | MO_UW,
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MO_LEUL = MO_LE | MO_UL,
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MO_LESW = MO_LE | MO_SW,
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MO_LESL = MO_LE | MO_SL,
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MO_LEQ = MO_LE | MO_Q,
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MO_BEUW = MO_BE | MO_UW,
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MO_BEUL = MO_BE | MO_UL,
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MO_BESW = MO_BE | MO_SW,
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MO_BESL = MO_BE | MO_SL,
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MO_BEQ = MO_BE | MO_Q,
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MO_TEUW = MO_TE | MO_UW,
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MO_TEUL = MO_TE | MO_UL,
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MO_TESW = MO_TE | MO_SW,
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MO_TESL = MO_TE | MO_SL,
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MO_TEQ = MO_TE | MO_Q,
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MO_SSIZE = MO_SIZE | MO_SIGN,
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} TCGMemOp;
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typedef tcg_target_ulong TCGArg;
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/* Define a type and accessor macros for variables. Using pointer types
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is nice because it gives some level of type safely. Converting to and
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from intptr_t rather than int reduces the number of sign-extension
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instructions that get implied on 64-bit hosts. Users of tcg_gen_* don't
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need to know about any of this, and should treat TCGv as an opaque type.
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In addition we do typechecking for different types of variables. TCGv_i32
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and TCGv_i64 are 32/64-bit variables respectively. TCGv and TCGv_ptr
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are aliases for target_ulong and host pointer sized values respectively. */
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typedef struct TCGv_i32_d *TCGv_i32;
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typedef struct TCGv_i64_d *TCGv_i64;
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typedef struct TCGv_ptr_d *TCGv_ptr;
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static inline TCGv_i32 QEMU_ARTIFICIAL MAKE_TCGV_I32(intptr_t i)
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{
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return (TCGv_i32)i;
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}
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static inline TCGv_i64 QEMU_ARTIFICIAL MAKE_TCGV_I64(intptr_t i)
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{
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return (TCGv_i64)i;
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}
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static inline TCGv_ptr QEMU_ARTIFICIAL MAKE_TCGV_PTR(intptr_t i)
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{
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return (TCGv_ptr)i;
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}
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static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I32(TCGv_i32 t)
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{
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return (intptr_t)t;
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}
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static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_I64(TCGv_i64 t)
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{
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return (intptr_t)t;
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}
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static inline intptr_t QEMU_ARTIFICIAL GET_TCGV_PTR(TCGv_ptr t)
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{
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return (intptr_t)t;
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}
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#if TCG_TARGET_REG_BITS == 32
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#define TCGV_LOW(t) MAKE_TCGV_I32(GET_TCGV_I64(t))
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#define TCGV_HIGH(t) MAKE_TCGV_I32(GET_TCGV_I64(t) + 1)
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#endif
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#define TCGV_EQUAL_I32(a, b) (GET_TCGV_I32(a) == GET_TCGV_I32(b))
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#define TCGV_EQUAL_I64(a, b) (GET_TCGV_I64(a) == GET_TCGV_I64(b))
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#define TCGV_EQUAL_PTR(a, b) (GET_TCGV_PTR(a) == GET_TCGV_PTR(b))
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/* Dummy definition to avoid compiler warnings. */
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#define TCGV_UNUSED_I32(x) x = MAKE_TCGV_I32(-1)
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#define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1)
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#define TCGV_UNUSED_PTR(x) x = MAKE_TCGV_PTR(-1)
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#define TCGV_IS_UNUSED_I32(x) (GET_TCGV_I32(x) == -1)
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#define TCGV_IS_UNUSED_I64(x) (GET_TCGV_I64(x) == -1)
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#define TCGV_IS_UNUSED_PTR(x) (GET_TCGV_PTR(x) == -1)
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/* call flags */
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/* Helper does not read globals (either directly or through an exception). It
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implies TCG_CALL_NO_WRITE_GLOBALS. */
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#define TCG_CALL_NO_READ_GLOBALS 0x0010
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/* Helper does not write globals */
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#define TCG_CALL_NO_WRITE_GLOBALS 0x0020
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/* Helper can be safely suppressed if the return value is not used. */
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#define TCG_CALL_NO_SIDE_EFFECTS 0x0040
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/* convenience version of most used call flags */
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#define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS
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#define TCG_CALL_NO_WG TCG_CALL_NO_WRITE_GLOBALS
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#define TCG_CALL_NO_SE TCG_CALL_NO_SIDE_EFFECTS
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#define TCG_CALL_NO_RWG_SE (TCG_CALL_NO_RWG | TCG_CALL_NO_SE)
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#define TCG_CALL_NO_WG_SE (TCG_CALL_NO_WG | TCG_CALL_NO_SE)
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/* used to align parameters */
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#define TCG_CALL_DUMMY_TCGV MAKE_TCGV_I32(-1)
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#define TCG_CALL_DUMMY_ARG ((TCGArg)(-1))
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/* Conditions. Note that these are laid out for easy manipulation by
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the functions below:
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bit 0 is used for inverting;
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bit 1 is signed,
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bit 2 is unsigned,
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bit 3 is used with bit 0 for swapping signed/unsigned. */
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typedef enum {
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/* non-signed */
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TCG_COND_NEVER = 0 | 0 | 0 | 0,
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TCG_COND_ALWAYS = 0 | 0 | 0 | 1,
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TCG_COND_EQ = 8 | 0 | 0 | 0,
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TCG_COND_NE = 8 | 0 | 0 | 1,
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/* signed */
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TCG_COND_LT = 0 | 0 | 2 | 0,
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TCG_COND_GE = 0 | 0 | 2 | 1,
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TCG_COND_LE = 8 | 0 | 2 | 0,
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TCG_COND_GT = 8 | 0 | 2 | 1,
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/* unsigned */
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TCG_COND_LTU = 0 | 4 | 0 | 0,
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TCG_COND_GEU = 0 | 4 | 0 | 1,
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TCG_COND_LEU = 8 | 4 | 0 | 0,
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TCG_COND_GTU = 8 | 4 | 0 | 1,
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} TCGCond;
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/* Invert the sense of the comparison. */
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static inline TCGCond tcg_invert_cond(TCGCond c)
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{
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return (TCGCond)(c ^ 1);
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}
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/* Swap the operands in a comparison. */
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static inline TCGCond tcg_swap_cond(TCGCond c)
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{
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return c & 6 ? (TCGCond)(c ^ 9) : c;
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}
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/* Create an "unsigned" version of a "signed" comparison. */
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static inline TCGCond tcg_unsigned_cond(TCGCond c)
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{
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return c & 2 ? (TCGCond)(c ^ 6) : c;
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}
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/* Must a comparison be considered unsigned? */
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static inline bool is_unsigned_cond(TCGCond c)
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{
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return (c & 4) != 0;
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}
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/* Create a "high" version of a double-word comparison.
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This removes equality from a LTE or GTE comparison. */
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static inline TCGCond tcg_high_cond(TCGCond c)
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{
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switch (c) {
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case TCG_COND_GE:
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case TCG_COND_LE:
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case TCG_COND_GEU:
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case TCG_COND_LEU:
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return (TCGCond)(c ^ 8);
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default:
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return c;
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}
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}
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typedef enum TCGTempVal {
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TEMP_VAL_DEAD,
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TEMP_VAL_REG,
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TEMP_VAL_MEM,
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TEMP_VAL_CONST,
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} TCGTempVal;
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typedef struct TCGTemp {
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unsigned int reg:8;
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unsigned int mem_reg:8;
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TCGTempVal val_type:8;
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TCGType base_type:8;
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TCGType type:8;
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unsigned int fixed_reg:1;
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unsigned int mem_coherent:1;
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unsigned int mem_allocated:1;
|
|
unsigned int temp_local:1; /* If true, the temp is saved across
|
|
basic blocks. Otherwise, it is not
|
|
preserved across basic blocks. */
|
|
unsigned int temp_allocated:1; /* never used for code gen */
|
|
|
|
tcg_target_long val;
|
|
intptr_t mem_offset;
|
|
const char *name;
|
|
} TCGTemp;
|
|
|
|
typedef struct TCGContext TCGContext;
|
|
|
|
typedef struct TCGTempSet {
|
|
unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
|
|
} TCGTempSet;
|
|
|
|
typedef struct TCGOp {
|
|
TCGOpcode opc : 8;
|
|
|
|
/* The number of out and in parameter for a call. */
|
|
unsigned callo : 2;
|
|
unsigned calli : 6;
|
|
|
|
/* Index of the arguments for this op, or -1 for zero-operand ops. */
|
|
signed args : 16;
|
|
|
|
/* Index of the prex/next op, or -1 for the end of the list. */
|
|
signed prev : 16;
|
|
signed next : 16;
|
|
} TCGOp;
|
|
|
|
QEMU_BUILD_BUG_ON(NB_OPS > 0xff);
|
|
QEMU_BUILD_BUG_ON(OPC_BUF_SIZE >= 0x7fff);
|
|
QEMU_BUILD_BUG_ON(OPPARAM_BUF_SIZE >= 0x7fff);
|
|
|
|
struct TCGContext {
|
|
uint8_t *pool_cur, *pool_end;
|
|
TCGPool *pool_first, *pool_current, *pool_first_large;
|
|
int nb_labels;
|
|
int nb_globals;
|
|
int nb_temps;
|
|
|
|
/* goto_tb support */
|
|
tcg_insn_unit *code_buf;
|
|
uintptr_t *tb_next;
|
|
uint16_t *tb_next_offset;
|
|
uint16_t *tb_jmp_offset; /* != NULL if USE_DIRECT_JUMP */
|
|
|
|
/* liveness analysis */
|
|
uint16_t *op_dead_args; /* for each operation, each bit tells if the
|
|
corresponding argument is dead */
|
|
uint8_t *op_sync_args; /* for each operation, each bit tells if the
|
|
corresponding output argument needs to be
|
|
sync to memory. */
|
|
|
|
TCGRegSet reserved_regs;
|
|
intptr_t current_frame_offset;
|
|
intptr_t frame_start;
|
|
intptr_t frame_end;
|
|
int frame_reg;
|
|
|
|
tcg_insn_unit *code_ptr;
|
|
|
|
GHashTable *helpers;
|
|
|
|
#ifdef CONFIG_PROFILER
|
|
/* profiling info */
|
|
int64_t tb_count1;
|
|
int64_t tb_count;
|
|
int64_t op_count; /* total insn count */
|
|
int op_count_max; /* max insn per TB */
|
|
int64_t temp_count;
|
|
int temp_count_max;
|
|
int64_t del_op_count;
|
|
int64_t code_in_len;
|
|
int64_t code_out_len;
|
|
int64_t interm_time;
|
|
int64_t code_time;
|
|
int64_t la_time;
|
|
int64_t opt_time;
|
|
int64_t restore_count;
|
|
int64_t restore_time;
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_TCG
|
|
int temps_in_use;
|
|
int goto_tb_issue_mask;
|
|
#endif
|
|
|
|
int gen_first_op_idx;
|
|
int gen_last_op_idx;
|
|
int gen_next_op_idx;
|
|
int gen_next_parm_idx;
|
|
|
|
/* Code generation. Note that we specifically do not use tcg_insn_unit
|
|
here, because there's too much arithmetic throughout that relies
|
|
on addition and subtraction working on bytes. Rely on the GCC
|
|
extension that allows arithmetic on void*. */
|
|
int code_gen_max_blocks;
|
|
void *code_gen_prologue;
|
|
void *code_gen_buffer;
|
|
size_t code_gen_buffer_size;
|
|
/* threshold to flush the translated code buffer */
|
|
size_t code_gen_buffer_max_size;
|
|
void *code_gen_ptr;
|
|
|
|
TBContext tb_ctx;
|
|
|
|
/* The TCGBackendData structure is private to tcg-target.c. */
|
|
struct TCGBackendData *be;
|
|
|
|
TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
|
|
TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
|
|
|
|
/* tells in which temporary a given register is. It does not take
|
|
into account fixed registers */
|
|
int reg_to_temp[TCG_TARGET_NB_REGS];
|
|
|
|
TCGOp gen_op_buf[OPC_BUF_SIZE];
|
|
TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
|
|
|
|
target_ulong gen_opc_pc[OPC_BUF_SIZE];
|
|
uint16_t gen_opc_icount[OPC_BUF_SIZE];
|
|
uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
|
|
};
|
|
|
|
extern TCGContext tcg_ctx;
|
|
|
|
/* The number of opcodes emitted so far. */
|
|
static inline int tcg_op_buf_count(void)
|
|
{
|
|
return tcg_ctx.gen_next_op_idx;
|
|
}
|
|
|
|
/* Test for whether to terminate the TB for using too many opcodes. */
|
|
static inline bool tcg_op_buf_full(void)
|
|
{
|
|
return tcg_op_buf_count() >= OPC_MAX_SIZE;
|
|
}
|
|
|
|
/* pool based memory allocation */
|
|
|
|
void *tcg_malloc_internal(TCGContext *s, int size);
|
|
void tcg_pool_reset(TCGContext *s);
|
|
void tcg_pool_delete(TCGContext *s);
|
|
|
|
static inline void *tcg_malloc(int size)
|
|
{
|
|
TCGContext *s = &tcg_ctx;
|
|
uint8_t *ptr, *ptr_end;
|
|
size = (size + sizeof(long) - 1) & ~(sizeof(long) - 1);
|
|
ptr = s->pool_cur;
|
|
ptr_end = ptr + size;
|
|
if (unlikely(ptr_end > s->pool_end)) {
|
|
return tcg_malloc_internal(&tcg_ctx, size);
|
|
} else {
|
|
s->pool_cur = ptr_end;
|
|
return ptr;
|
|
}
|
|
}
|
|
|
|
void tcg_context_init(TCGContext *s);
|
|
void tcg_prologue_init(TCGContext *s);
|
|
void tcg_func_start(TCGContext *s);
|
|
|
|
int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf);
|
|
int tcg_gen_code_search_pc(TCGContext *s, tcg_insn_unit *gen_code_buf,
|
|
long offset);
|
|
|
|
void tcg_set_frame(TCGContext *s, int reg, intptr_t start, intptr_t size);
|
|
|
|
TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name);
|
|
TCGv_i32 tcg_global_mem_new_i32(int reg, intptr_t offset, const char *name);
|
|
TCGv_i32 tcg_temp_new_internal_i32(int temp_local);
|
|
static inline TCGv_i32 tcg_temp_new_i32(void)
|
|
{
|
|
return tcg_temp_new_internal_i32(0);
|
|
}
|
|
static inline TCGv_i32 tcg_temp_local_new_i32(void)
|
|
{
|
|
return tcg_temp_new_internal_i32(1);
|
|
}
|
|
void tcg_temp_free_i32(TCGv_i32 arg);
|
|
char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg);
|
|
|
|
TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name);
|
|
TCGv_i64 tcg_global_mem_new_i64(int reg, intptr_t offset, const char *name);
|
|
TCGv_i64 tcg_temp_new_internal_i64(int temp_local);
|
|
static inline TCGv_i64 tcg_temp_new_i64(void)
|
|
{
|
|
return tcg_temp_new_internal_i64(0);
|
|
}
|
|
static inline TCGv_i64 tcg_temp_local_new_i64(void)
|
|
{
|
|
return tcg_temp_new_internal_i64(1);
|
|
}
|
|
void tcg_temp_free_i64(TCGv_i64 arg);
|
|
char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg);
|
|
|
|
#if defined(CONFIG_DEBUG_TCG)
|
|
/* If you call tcg_clear_temp_count() at the start of a section of
|
|
* code which is not supposed to leak any TCG temporaries, then
|
|
* calling tcg_check_temp_count() at the end of the section will
|
|
* return 1 if the section did in fact leak a temporary.
|
|
*/
|
|
void tcg_clear_temp_count(void);
|
|
int tcg_check_temp_count(void);
|
|
#else
|
|
#define tcg_clear_temp_count() do { } while (0)
|
|
#define tcg_check_temp_count() 0
|
|
#endif
|
|
|
|
void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf);
|
|
void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf);
|
|
|
|
#define TCG_CT_ALIAS 0x80
|
|
#define TCG_CT_IALIAS 0x40
|
|
#define TCG_CT_REG 0x01
|
|
#define TCG_CT_CONST 0x02 /* any constant of register size */
|
|
|
|
typedef struct TCGArgConstraint {
|
|
uint16_t ct;
|
|
uint8_t alias_index;
|
|
union {
|
|
TCGRegSet regs;
|
|
} u;
|
|
} TCGArgConstraint;
|
|
|
|
#define TCG_MAX_OP_ARGS 16
|
|
|
|
/* Bits for TCGOpDef->flags, 8 bits available. */
|
|
enum {
|
|
/* Instruction defines the end of a basic block. */
|
|
TCG_OPF_BB_END = 0x01,
|
|
/* Instruction clobbers call registers and potentially update globals. */
|
|
TCG_OPF_CALL_CLOBBER = 0x02,
|
|
/* Instruction has side effects: it cannot be removed if its outputs
|
|
are not used, and might trigger exceptions. */
|
|
TCG_OPF_SIDE_EFFECTS = 0x04,
|
|
/* Instruction operands are 64-bits (otherwise 32-bits). */
|
|
TCG_OPF_64BIT = 0x08,
|
|
/* Instruction is optional and not implemented by the host, or insn
|
|
is generic and should not be implemened by the host. */
|
|
TCG_OPF_NOT_PRESENT = 0x10,
|
|
};
|
|
|
|
typedef struct TCGOpDef {
|
|
const char *name;
|
|
uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
|
|
uint8_t flags;
|
|
TCGArgConstraint *args_ct;
|
|
int *sorted_args;
|
|
#if defined(CONFIG_DEBUG_TCG)
|
|
int used;
|
|
#endif
|
|
} TCGOpDef;
|
|
|
|
extern TCGOpDef tcg_op_defs[];
|
|
extern const size_t tcg_op_defs_max;
|
|
|
|
typedef struct TCGTargetOpDef {
|
|
TCGOpcode op;
|
|
const char *args_ct_str[TCG_MAX_OP_ARGS];
|
|
} TCGTargetOpDef;
|
|
|
|
#define tcg_abort() \
|
|
do {\
|
|
fprintf(stderr, "%s:%d: tcg fatal error\n", __FILE__, __LINE__);\
|
|
abort();\
|
|
} while (0)
|
|
|
|
#ifdef CONFIG_DEBUG_TCG
|
|
# define tcg_debug_assert(X) do { assert(X); } while (0)
|
|
#elif QEMU_GNUC_PREREQ(4, 5)
|
|
# define tcg_debug_assert(X) \
|
|
do { if (!(X)) { __builtin_unreachable(); } } while (0)
|
|
#else
|
|
# define tcg_debug_assert(X) do { (void)(X); } while (0)
|
|
#endif
|
|
|
|
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs);
|
|
|
|
#if UINTPTR_MAX == UINT32_MAX
|
|
#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I32(n))
|
|
#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I32(GET_TCGV_PTR(n))
|
|
|
|
#define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i32((intptr_t)(V)))
|
|
#define tcg_global_reg_new_ptr(R, N) \
|
|
TCGV_NAT_TO_PTR(tcg_global_reg_new_i32((R), (N)))
|
|
#define tcg_global_mem_new_ptr(R, O, N) \
|
|
TCGV_NAT_TO_PTR(tcg_global_mem_new_i32((R), (O), (N)))
|
|
#define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i32())
|
|
#define tcg_temp_free_ptr(T) tcg_temp_free_i32(TCGV_PTR_TO_NAT(T))
|
|
#else
|
|
#define TCGV_NAT_TO_PTR(n) MAKE_TCGV_PTR(GET_TCGV_I64(n))
|
|
#define TCGV_PTR_TO_NAT(n) MAKE_TCGV_I64(GET_TCGV_PTR(n))
|
|
|
|
#define tcg_const_ptr(V) TCGV_NAT_TO_PTR(tcg_const_i64((intptr_t)(V)))
|
|
#define tcg_global_reg_new_ptr(R, N) \
|
|
TCGV_NAT_TO_PTR(tcg_global_reg_new_i64((R), (N)))
|
|
#define tcg_global_mem_new_ptr(R, O, N) \
|
|
TCGV_NAT_TO_PTR(tcg_global_mem_new_i64((R), (O), (N)))
|
|
#define tcg_temp_new_ptr() TCGV_NAT_TO_PTR(tcg_temp_new_i64())
|
|
#define tcg_temp_free_ptr(T) tcg_temp_free_i64(TCGV_PTR_TO_NAT(T))
|
|
#endif
|
|
|
|
void tcg_gen_callN(TCGContext *s, void *func,
|
|
TCGArg ret, int nargs, TCGArg *args);
|
|
|
|
void tcg_op_remove(TCGContext *s, TCGOp *op);
|
|
void tcg_optimize(TCGContext *s);
|
|
|
|
/* only used for debugging purposes */
|
|
void tcg_dump_ops(TCGContext *s);
|
|
|
|
void dump_ops(const uint16_t *opc_buf, const TCGArg *opparam_buf);
|
|
TCGv_i32 tcg_const_i32(int32_t val);
|
|
TCGv_i64 tcg_const_i64(int64_t val);
|
|
TCGv_i32 tcg_const_local_i32(int32_t val);
|
|
TCGv_i64 tcg_const_local_i64(int64_t val);
|
|
|
|
TCGLabel *gen_new_label(void);
|
|
|
|
/**
|
|
* label_arg
|
|
* @l: label
|
|
*
|
|
* Encode a label for storage in the TCG opcode stream.
|
|
*/
|
|
|
|
static inline TCGArg label_arg(TCGLabel *l)
|
|
{
|
|
return (uintptr_t)l;
|
|
}
|
|
|
|
/**
|
|
* arg_label
|
|
* @i: value
|
|
*
|
|
* The opposite of label_arg. Retrieve a label from the
|
|
* encoding of the TCG opcode stream.
|
|
*/
|
|
|
|
static inline TCGLabel *arg_label(TCGArg i)
|
|
{
|
|
return (TCGLabel *)(uintptr_t)i;
|
|
}
|
|
|
|
/**
|
|
* tcg_ptr_byte_diff
|
|
* @a, @b: addresses to be differenced
|
|
*
|
|
* There are many places within the TCG backends where we need a byte
|
|
* difference between two pointers. While this can be accomplished
|
|
* with local casting, it's easy to get wrong -- especially if one is
|
|
* concerned with the signedness of the result.
|
|
*
|
|
* This version relies on GCC's void pointer arithmetic to get the
|
|
* correct result.
|
|
*/
|
|
|
|
static inline ptrdiff_t tcg_ptr_byte_diff(void *a, void *b)
|
|
{
|
|
return a - b;
|
|
}
|
|
|
|
/**
|
|
* tcg_pcrel_diff
|
|
* @s: the tcg context
|
|
* @target: address of the target
|
|
*
|
|
* Produce a pc-relative difference, from the current code_ptr
|
|
* to the destination address.
|
|
*/
|
|
|
|
static inline ptrdiff_t tcg_pcrel_diff(TCGContext *s, void *target)
|
|
{
|
|
return tcg_ptr_byte_diff(target, s->code_ptr);
|
|
}
|
|
|
|
/**
|
|
* tcg_current_code_size
|
|
* @s: the tcg context
|
|
*
|
|
* Compute the current code size within the translation block.
|
|
* This is used to fill in qemu's data structures for goto_tb.
|
|
*/
|
|
|
|
static inline size_t tcg_current_code_size(TCGContext *s)
|
|
{
|
|
return tcg_ptr_byte_diff(s->code_ptr, s->code_buf);
|
|
}
|
|
|
|
/* Combine the TCGMemOp and mmu_idx parameters into a single value. */
|
|
typedef uint32_t TCGMemOpIdx;
|
|
|
|
/**
|
|
* make_memop_idx
|
|
* @op: memory operation
|
|
* @idx: mmu index
|
|
*
|
|
* Encode these values into a single parameter.
|
|
*/
|
|
static inline TCGMemOpIdx make_memop_idx(TCGMemOp op, unsigned idx)
|
|
{
|
|
tcg_debug_assert(idx <= 15);
|
|
return (op << 4) | idx;
|
|
}
|
|
|
|
/**
|
|
* get_memop
|
|
* @oi: combined op/idx parameter
|
|
*
|
|
* Extract the memory operation from the combined value.
|
|
*/
|
|
static inline TCGMemOp get_memop(TCGMemOpIdx oi)
|
|
{
|
|
return oi >> 4;
|
|
}
|
|
|
|
/**
|
|
* get_mmuidx
|
|
* @oi: combined op/idx parameter
|
|
*
|
|
* Extract the mmu index from the combined value.
|
|
*/
|
|
static inline unsigned get_mmuidx(TCGMemOpIdx oi)
|
|
{
|
|
return oi & 15;
|
|
}
|
|
|
|
/**
|
|
* tcg_qemu_tb_exec:
|
|
* @env: CPUArchState * for the CPU
|
|
* @tb_ptr: address of generated code for the TB to execute
|
|
*
|
|
* Start executing code from a given translation block.
|
|
* Where translation blocks have been linked, execution
|
|
* may proceed from the given TB into successive ones.
|
|
* Control eventually returns only when some action is needed
|
|
* from the top-level loop: either control must pass to a TB
|
|
* which has not yet been directly linked, or an asynchronous
|
|
* event such as an interrupt needs handling.
|
|
*
|
|
* The return value is a pointer to the next TB to execute
|
|
* (if known; otherwise zero). This pointer is assumed to be
|
|
* 4-aligned, and the bottom two bits are used to return further
|
|
* information:
|
|
* 0, 1: the link between this TB and the next is via the specified
|
|
* TB index (0 or 1). That is, we left the TB via (the equivalent
|
|
* of) "goto_tb <index>". The main loop uses this to determine
|
|
* how to link the TB just executed to the next.
|
|
* 2: we are using instruction counting code generation, and we
|
|
* did not start executing this TB because the instruction counter
|
|
* would hit zero midway through it. In this case the next-TB pointer
|
|
* returned is the TB we were about to execute, and the caller must
|
|
* arrange to execute the remaining count of instructions.
|
|
* 3: we stopped because the CPU's exit_request flag was set
|
|
* (usually meaning that there is an interrupt that needs to be
|
|
* handled). The next-TB pointer returned is the TB we were
|
|
* about to execute when we noticed the pending exit request.
|
|
*
|
|
* If the bottom two bits indicate an exit-via-index then the CPU
|
|
* state is correctly synchronised and ready for execution of the next
|
|
* TB (and in particular the guest PC is the address to execute next).
|
|
* Otherwise, we gave up on execution of this TB before it started, and
|
|
* the caller must fix up the CPU state by calling the CPU's
|
|
* synchronize_from_tb() method with the next-TB pointer we return (falling
|
|
* back to calling the CPU's set_pc method with tb->pb if no
|
|
* synchronize_from_tb() method exists).
|
|
*
|
|
* Note that TCG targets may use a different definition of tcg_qemu_tb_exec
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* to this default (which just calls the prologue.code emitted by
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* tcg_target_qemu_prologue()).
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*/
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#define TB_EXIT_MASK 3
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#define TB_EXIT_IDX0 0
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#define TB_EXIT_IDX1 1
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#define TB_EXIT_ICOUNT_EXPIRED 2
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#define TB_EXIT_REQUESTED 3
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#ifdef HAVE_TCG_QEMU_TB_EXEC
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uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr);
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#else
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# define tcg_qemu_tb_exec(env, tb_ptr) \
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((uintptr_t (*)(void *, void *))tcg_ctx.code_gen_prologue)(env, tb_ptr)
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#endif
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void tcg_register_jit(void *buf, size_t buf_size);
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/*
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* Memory helpers that will be used by TCG generated code.
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*/
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#ifdef CONFIG_SOFTMMU
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/* Value zero-extended to tcg register size. */
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tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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|
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/* Value sign-extended to tcg register size. */
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tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
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|
TCGMemOpIdx oi, uintptr_t retaddr);
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|
|
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void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
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TCGMemOpIdx oi, uintptr_t retaddr);
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void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
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TCGMemOpIdx oi, uintptr_t retaddr);
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void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
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TCGMemOpIdx oi, uintptr_t retaddr);
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void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
|
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TCGMemOpIdx oi, uintptr_t retaddr);
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|
void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
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TCGMemOpIdx oi, uintptr_t retaddr);
|
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void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
|
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TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
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TCGMemOpIdx oi, uintptr_t retaddr);
|
|
|
|
uint8_t helper_ret_ldb_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint16_t helper_le_ldw_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint32_t helper_le_ldl_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint64_t helper_le_ldq_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint16_t helper_be_ldw_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint32_t helper_be_ldl_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint64_t helper_be_ldq_cmmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
|
|
/* Temporary aliases until backends are converted. */
|
|
#ifdef TARGET_WORDS_BIGENDIAN
|
|
# define helper_ret_ldsw_mmu helper_be_ldsw_mmu
|
|
# define helper_ret_lduw_mmu helper_be_lduw_mmu
|
|
# define helper_ret_ldsl_mmu helper_be_ldsl_mmu
|
|
# define helper_ret_ldul_mmu helper_be_ldul_mmu
|
|
# define helper_ret_ldl_mmu helper_be_ldul_mmu
|
|
# define helper_ret_ldq_mmu helper_be_ldq_mmu
|
|
# define helper_ret_stw_mmu helper_be_stw_mmu
|
|
# define helper_ret_stl_mmu helper_be_stl_mmu
|
|
# define helper_ret_stq_mmu helper_be_stq_mmu
|
|
# define helper_ret_ldw_cmmu helper_be_ldw_cmmu
|
|
# define helper_ret_ldl_cmmu helper_be_ldl_cmmu
|
|
# define helper_ret_ldq_cmmu helper_be_ldq_cmmu
|
|
#else
|
|
# define helper_ret_ldsw_mmu helper_le_ldsw_mmu
|
|
# define helper_ret_lduw_mmu helper_le_lduw_mmu
|
|
# define helper_ret_ldsl_mmu helper_le_ldsl_mmu
|
|
# define helper_ret_ldul_mmu helper_le_ldul_mmu
|
|
# define helper_ret_ldl_mmu helper_le_ldul_mmu
|
|
# define helper_ret_ldq_mmu helper_le_ldq_mmu
|
|
# define helper_ret_stw_mmu helper_le_stw_mmu
|
|
# define helper_ret_stl_mmu helper_le_stl_mmu
|
|
# define helper_ret_stq_mmu helper_le_stq_mmu
|
|
# define helper_ret_ldw_cmmu helper_le_ldw_cmmu
|
|
# define helper_ret_ldl_cmmu helper_le_ldl_cmmu
|
|
# define helper_ret_ldq_cmmu helper_le_ldq_cmmu
|
|
#endif
|
|
|
|
#endif /* CONFIG_SOFTMMU */
|
|
|
|
#endif /* TCG_H */
|