47d590df34
Shortly, the full code_gen_buffer will only be visible
to region.c, so move in_code_gen_buffer out-of-line.
Move the debugging versions of tcg_splitwx_to_{rx,rw}
to region.c as well, so that the compiler gets to see
the implementation of in_code_gen_buffer.
This leaves exactly one use of in_code_gen_buffer outside
of region.c, in cpu_restore_state. Which, being on the
exception path, is not performance critical.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
1510 lines
47 KiB
C
1510 lines
47 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 "cpu.h"
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#include "exec/memop.h"
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#include "qemu/bitops.h"
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#include "qemu/plugin.h"
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#include "qemu/queue.h"
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#include "tcg/tcg-mo.h"
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#include "tcg-target.h"
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#include "qemu/int128.h"
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/* XXX: make safe guess about sizes */
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#define MAX_OP_PER_INSTR 266
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#if HOST_LONG_BITS == 32
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#define MAX_OPC_PARAM_PER_ARG 2
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#else
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#define MAX_OPC_PARAM_PER_ARG 1
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#endif
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#define MAX_OPC_PARAM_IARGS 6
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#define MAX_OPC_PARAM_OARGS 1
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#define MAX_OPC_PARAM_ARGS (MAX_OPC_PARAM_IARGS + MAX_OPC_PARAM_OARGS)
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/* A Call op needs up to 4 + 2N parameters on 32-bit archs,
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* and up to 4 + N parameters on 64-bit archs
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* (N = number of input arguments + output arguments). */
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#define MAX_OPC_PARAM (4 + (MAX_OPC_PARAM_PER_ARG * MAX_OPC_PARAM_ARGS))
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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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/* Oversized TCG guests make things like MTTCG hard
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* as we can't use atomics for cputlb updates.
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*/
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#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
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#define TCG_OVERSIZED_GUEST 1
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#else
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#define TCG_OVERSIZED_GUEST 0
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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_clz_i64 0
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#define TCG_TARGET_HAS_ctz_i64 0
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#define TCG_TARGET_HAS_ctpop_i64 0
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#define TCG_TARGET_HAS_deposit_i64 0
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#define TCG_TARGET_HAS_extract_i64 0
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#define TCG_TARGET_HAS_sextract_i64 0
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#define TCG_TARGET_HAS_extract2_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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#ifndef TCG_TARGET_extract_i32_valid
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#define TCG_TARGET_extract_i32_valid(ofs, len) 1
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#endif
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#ifndef TCG_TARGET_extract_i64_valid
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#define TCG_TARGET_extract_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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#if !defined(TCG_TARGET_HAS_v64) \
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&& !defined(TCG_TARGET_HAS_v128) \
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&& !defined(TCG_TARGET_HAS_v256)
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#define TCG_TARGET_MAYBE_vec 0
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#define TCG_TARGET_HAS_abs_vec 0
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#define TCG_TARGET_HAS_neg_vec 0
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#define TCG_TARGET_HAS_not_vec 0
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#define TCG_TARGET_HAS_andc_vec 0
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#define TCG_TARGET_HAS_orc_vec 0
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#define TCG_TARGET_HAS_roti_vec 0
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#define TCG_TARGET_HAS_rots_vec 0
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#define TCG_TARGET_HAS_rotv_vec 0
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#define TCG_TARGET_HAS_shi_vec 0
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#define TCG_TARGET_HAS_shs_vec 0
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#define TCG_TARGET_HAS_shv_vec 0
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#define TCG_TARGET_HAS_mul_vec 0
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#define TCG_TARGET_HAS_sat_vec 0
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#define TCG_TARGET_HAS_minmax_vec 0
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#define TCG_TARGET_HAS_bitsel_vec 0
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#define TCG_TARGET_HAS_cmpsel_vec 0
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#else
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#define TCG_TARGET_MAYBE_vec 1
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#endif
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#ifndef TCG_TARGET_HAS_v64
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#define TCG_TARGET_HAS_v64 0
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#endif
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#ifndef TCG_TARGET_HAS_v128
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#define TCG_TARGET_HAS_v128 0
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#endif
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#ifndef TCG_TARGET_HAS_v256
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#define TCG_TARGET_HAS_v256 0
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#endif
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#ifndef TARGET_INSN_START_EXTRA_WORDS
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# define TARGET_INSN_START_WORDS 1
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#else
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# define TARGET_INSN_START_WORDS (1 + TARGET_INSN_START_EXTRA_WORDS)
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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/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_set_reg(d, r) ((d) |= (TCGRegSet)1 << (r))
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#define tcg_regset_reset_reg(d, r) ((d) &= ~((TCGRegSet)1 << (r)))
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#define tcg_regset_test_reg(d, r) (((d) >> (r)) & 1)
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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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#if defined CONFIG_DEBUG_TCG || defined QEMU_STATIC_ANALYSIS
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# define tcg_debug_assert(X) do { assert(X); } while (0)
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#else
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# define tcg_debug_assert(X) \
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do { if (!(X)) { __builtin_unreachable(); } } while (0)
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#endif
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typedef struct TCGRelocation TCGRelocation;
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struct TCGRelocation {
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QSIMPLEQ_ENTRY(TCGRelocation) next;
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tcg_insn_unit *ptr;
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intptr_t addend;
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int type;
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};
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typedef struct TCGLabel TCGLabel;
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struct TCGLabel {
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unsigned present : 1;
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unsigned has_value : 1;
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unsigned id : 14;
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unsigned refs : 16;
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union {
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uintptr_t value;
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const tcg_insn_unit *value_ptr;
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} u;
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QSIMPLEQ_HEAD(, TCGRelocation) relocs;
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QSIMPLEQ_ENTRY(TCGLabel) next;
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};
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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[] __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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#define TCG_MAX_INSNS 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_V64,
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TCG_TYPE_V128,
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TCG_TYPE_V256,
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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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/**
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* get_alignment_bits
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* @memop: MemOp value
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*
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* Extract the alignment size from the memop.
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*/
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static inline unsigned get_alignment_bits(MemOp memop)
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{
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unsigned a = memop & MO_AMASK;
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if (a == MO_UNALN) {
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/* No alignment required. */
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a = 0;
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} else if (a == MO_ALIGN) {
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/* A natural alignment requirement. */
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a = memop & MO_SIZE;
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} else {
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/* A specific alignment requirement. */
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a = a >> MO_ASHIFT;
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}
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#if defined(CONFIG_SOFTMMU)
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/* The requested alignment cannot overlap the TLB flags. */
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tcg_debug_assert((TLB_FLAGS_MASK & ((1 << a) - 1)) == 0);
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#endif
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return a;
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}
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typedef tcg_target_ulong TCGArg;
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/* Define type and accessor macros for TCG variables.
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TCG variables are the inputs and outputs of TCG ops, as described
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in tcg/README. Target CPU front-end code uses these types to deal
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with TCG variables as it emits TCG code via the tcg_gen_* functions.
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They come in several flavours:
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* TCGv_i32 : 32 bit integer type
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* TCGv_i64 : 64 bit integer type
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* TCGv_ptr : a host pointer type
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* TCGv_vec : a host vector type; the exact size is not exposed
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to the CPU front-end code.
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* TCGv : an integer type the same size as target_ulong
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(an alias for either TCGv_i32 or TCGv_i64)
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The compiler's type checking will complain if you mix them
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up and pass the wrong sized TCGv to a function.
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Users of tcg_gen_* don't need to know about any of the internal
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details of these, and should treat them as opaque types.
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You won't be able to look inside them in a debugger either.
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Internal implementation details follow:
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Note that there is no definition of the structs TCGv_i32_d etc anywhere.
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This is deliberate, because the values we store in variables of type
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TCGv_i32 are not really pointers-to-structures. They're just small
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integers, but keeping them in pointer types like this means that the
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compiler will complain if you accidentally pass a TCGv_i32 to a
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function which takes a TCGv_i64, and so on. Only the internals of
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TCG need to care about the actual contents of the types. */
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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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typedef struct TCGv_vec_d *TCGv_vec;
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typedef TCGv_ptr TCGv_env;
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#if TARGET_LONG_BITS == 32
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#define TCGv TCGv_i32
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#elif TARGET_LONG_BITS == 64
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#define TCGv TCGv_i64
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#else
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#error Unhandled TARGET_LONG_BITS value
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#endif
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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 0x0001
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/* Helper does not write globals */
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#define TCG_CALL_NO_WRITE_GLOBALS 0x0002
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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 0x0004
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/* Helper is QEMU_NORETURN. */
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#define TCG_CALL_NO_RETURN 0x0008
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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. See the comment before tcgv_i32_temp. */
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#define TCG_CALL_DUMMY_ARG ((TCGArg)0)
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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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{
|
|
return c & 6 ? (TCGCond)(c ^ 9) : c;
|
|
}
|
|
|
|
/* Create an "unsigned" version of a "signed" comparison. */
|
|
static inline TCGCond tcg_unsigned_cond(TCGCond c)
|
|
{
|
|
return c & 2 ? (TCGCond)(c ^ 6) : c;
|
|
}
|
|
|
|
/* Create a "signed" version of an "unsigned" comparison. */
|
|
static inline TCGCond tcg_signed_cond(TCGCond c)
|
|
{
|
|
return c & 4 ? (TCGCond)(c ^ 6) : c;
|
|
}
|
|
|
|
/* Must a comparison be considered unsigned? */
|
|
static inline bool is_unsigned_cond(TCGCond c)
|
|
{
|
|
return (c & 4) != 0;
|
|
}
|
|
|
|
/* Create a "high" version of a double-word comparison.
|
|
This removes equality from a LTE or GTE comparison. */
|
|
static inline TCGCond tcg_high_cond(TCGCond c)
|
|
{
|
|
switch (c) {
|
|
case TCG_COND_GE:
|
|
case TCG_COND_LE:
|
|
case TCG_COND_GEU:
|
|
case TCG_COND_LEU:
|
|
return (TCGCond)(c ^ 8);
|
|
default:
|
|
return c;
|
|
}
|
|
}
|
|
|
|
typedef enum TCGTempVal {
|
|
TEMP_VAL_DEAD,
|
|
TEMP_VAL_REG,
|
|
TEMP_VAL_MEM,
|
|
TEMP_VAL_CONST,
|
|
} TCGTempVal;
|
|
|
|
typedef enum TCGTempKind {
|
|
/* Temp is dead at the end of all basic blocks. */
|
|
TEMP_NORMAL,
|
|
/* Temp is saved across basic blocks but dead at the end of TBs. */
|
|
TEMP_LOCAL,
|
|
/* Temp is saved across both basic blocks and translation blocks. */
|
|
TEMP_GLOBAL,
|
|
/* Temp is in a fixed register. */
|
|
TEMP_FIXED,
|
|
/* Temp is a fixed constant. */
|
|
TEMP_CONST,
|
|
} TCGTempKind;
|
|
|
|
typedef struct TCGTemp {
|
|
TCGReg reg:8;
|
|
TCGTempVal val_type:8;
|
|
TCGType base_type:8;
|
|
TCGType type:8;
|
|
TCGTempKind kind:3;
|
|
unsigned int indirect_reg:1;
|
|
unsigned int indirect_base:1;
|
|
unsigned int mem_coherent:1;
|
|
unsigned int mem_allocated:1;
|
|
unsigned int temp_allocated:1;
|
|
|
|
int64_t val;
|
|
struct TCGTemp *mem_base;
|
|
intptr_t mem_offset;
|
|
const char *name;
|
|
|
|
/* Pass-specific information that can be stored for a temporary.
|
|
One word worth of integer data, and one pointer to data
|
|
allocated separately. */
|
|
uintptr_t state;
|
|
void *state_ptr;
|
|
} TCGTemp;
|
|
|
|
typedef struct TCGContext TCGContext;
|
|
|
|
typedef struct TCGTempSet {
|
|
unsigned long l[BITS_TO_LONGS(TCG_MAX_TEMPS)];
|
|
} TCGTempSet;
|
|
|
|
/* While we limit helpers to 6 arguments, for 32-bit hosts, with padding,
|
|
this imples a max of 6*2 (64-bit in) + 2 (64-bit out) = 14 operands.
|
|
There are never more than 2 outputs, which means that we can store all
|
|
dead + sync data within 16 bits. */
|
|
#define DEAD_ARG 4
|
|
#define SYNC_ARG 1
|
|
typedef uint16_t TCGLifeData;
|
|
|
|
/* The layout here is designed to avoid a bitfield crossing of
|
|
a 32-bit boundary, which would cause GCC to add extra padding. */
|
|
typedef struct TCGOp {
|
|
TCGOpcode opc : 8; /* 8 */
|
|
|
|
/* Parameters for this opcode. See below. */
|
|
unsigned param1 : 4; /* 12 */
|
|
unsigned param2 : 4; /* 16 */
|
|
|
|
/* Lifetime data of the operands. */
|
|
unsigned life : 16; /* 32 */
|
|
|
|
/* Next and previous opcodes. */
|
|
QTAILQ_ENTRY(TCGOp) link;
|
|
#ifdef CONFIG_PLUGIN
|
|
QSIMPLEQ_ENTRY(TCGOp) plugin_link;
|
|
#endif
|
|
|
|
/* Arguments for the opcode. */
|
|
TCGArg args[MAX_OPC_PARAM];
|
|
|
|
/* Register preferences for the output(s). */
|
|
TCGRegSet output_pref[2];
|
|
} TCGOp;
|
|
|
|
#define TCGOP_CALLI(X) (X)->param1
|
|
#define TCGOP_CALLO(X) (X)->param2
|
|
|
|
#define TCGOP_VECL(X) (X)->param1
|
|
#define TCGOP_VECE(X) (X)->param2
|
|
|
|
/* Make sure operands fit in the bitfields above. */
|
|
QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8));
|
|
|
|
typedef struct TCGProfile {
|
|
int64_t cpu_exec_time;
|
|
int64_t tb_count1;
|
|
int64_t tb_count;
|
|
int64_t op_count; /* total insn count */
|
|
int op_count_max; /* max insn per TB */
|
|
int temp_count_max;
|
|
int64_t temp_count;
|
|
int64_t del_op_count;
|
|
int64_t code_in_len;
|
|
int64_t code_out_len;
|
|
int64_t search_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;
|
|
int64_t table_op_count[NB_OPS];
|
|
} TCGProfile;
|
|
|
|
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;
|
|
int nb_indirects;
|
|
int nb_ops;
|
|
|
|
/* goto_tb support */
|
|
tcg_insn_unit *code_buf;
|
|
uint16_t *tb_jmp_reset_offset; /* tb->jmp_reset_offset */
|
|
uintptr_t *tb_jmp_insn_offset; /* tb->jmp_target_arg if direct_jump */
|
|
uintptr_t *tb_jmp_target_addr; /* tb->jmp_target_arg if !direct_jump */
|
|
|
|
TCGRegSet reserved_regs;
|
|
uint32_t tb_cflags; /* cflags of the current TB */
|
|
intptr_t current_frame_offset;
|
|
intptr_t frame_start;
|
|
intptr_t frame_end;
|
|
TCGTemp *frame_temp;
|
|
|
|
tcg_insn_unit *code_ptr;
|
|
|
|
#ifdef CONFIG_PROFILER
|
|
TCGProfile prof;
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_TCG
|
|
int temps_in_use;
|
|
int goto_tb_issue_mask;
|
|
const TCGOpcode *vecop_list;
|
|
#endif
|
|
|
|
/* 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*. */
|
|
void *code_gen_buffer;
|
|
size_t code_gen_buffer_size;
|
|
void *code_gen_ptr;
|
|
void *data_gen_ptr;
|
|
|
|
/* Threshold to flush the translated code buffer. */
|
|
void *code_gen_highwater;
|
|
|
|
size_t tb_phys_invalidate_count;
|
|
|
|
/* Track which vCPU triggers events */
|
|
CPUState *cpu; /* *_trans */
|
|
|
|
/* These structures are private to tcg-target.c.inc. */
|
|
#ifdef TCG_TARGET_NEED_LDST_LABELS
|
|
QSIMPLEQ_HEAD(, TCGLabelQemuLdst) ldst_labels;
|
|
#endif
|
|
#ifdef TCG_TARGET_NEED_POOL_LABELS
|
|
struct TCGLabelPoolData *pool_labels;
|
|
#endif
|
|
|
|
TCGLabel *exitreq_label;
|
|
|
|
#ifdef CONFIG_PLUGIN
|
|
/*
|
|
* We keep one plugin_tb struct per TCGContext. Note that on every TB
|
|
* translation we clear but do not free its contents; this way we
|
|
* avoid a lot of malloc/free churn, since after a few TB's it's
|
|
* unlikely that we'll need to allocate either more instructions or more
|
|
* space for instructions (for variable-instruction-length ISAs).
|
|
*/
|
|
struct qemu_plugin_tb *plugin_tb;
|
|
|
|
/* descriptor of the instruction being translated */
|
|
struct qemu_plugin_insn *plugin_insn;
|
|
|
|
/* list to quickly access the injected ops */
|
|
QSIMPLEQ_HEAD(, TCGOp) plugin_ops;
|
|
#endif
|
|
|
|
GHashTable *const_table[TCG_TYPE_COUNT];
|
|
TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
|
|
TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
|
|
|
|
QTAILQ_HEAD(, TCGOp) ops, free_ops;
|
|
QSIMPLEQ_HEAD(, TCGLabel) labels;
|
|
|
|
/* Tells which temporary holds a given register.
|
|
It does not take into account fixed registers */
|
|
TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
|
|
|
|
uint16_t gen_insn_end_off[TCG_MAX_INSNS];
|
|
target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
|
|
|
|
/* Exit to translator on overflow. */
|
|
sigjmp_buf jmp_trans;
|
|
};
|
|
|
|
static inline bool temp_readonly(TCGTemp *ts)
|
|
{
|
|
return ts->kind >= TEMP_FIXED;
|
|
}
|
|
|
|
extern TCGContext tcg_init_ctx;
|
|
extern __thread TCGContext *tcg_ctx;
|
|
extern const void *tcg_code_gen_epilogue;
|
|
extern uintptr_t tcg_splitwx_diff;
|
|
extern TCGv_env cpu_env;
|
|
|
|
bool in_code_gen_buffer(const void *p);
|
|
|
|
#ifdef CONFIG_DEBUG_TCG
|
|
const void *tcg_splitwx_to_rx(void *rw);
|
|
void *tcg_splitwx_to_rw(const void *rx);
|
|
#else
|
|
static inline const void *tcg_splitwx_to_rx(void *rw)
|
|
{
|
|
return rw ? rw + tcg_splitwx_diff : NULL;
|
|
}
|
|
|
|
static inline void *tcg_splitwx_to_rw(const void *rx)
|
|
{
|
|
return rx ? (void *)rx - tcg_splitwx_diff : NULL;
|
|
}
|
|
#endif
|
|
|
|
static inline size_t temp_idx(TCGTemp *ts)
|
|
{
|
|
ptrdiff_t n = ts - tcg_ctx->temps;
|
|
tcg_debug_assert(n >= 0 && n < tcg_ctx->nb_temps);
|
|
return n;
|
|
}
|
|
|
|
static inline TCGArg temp_arg(TCGTemp *ts)
|
|
{
|
|
return (uintptr_t)ts;
|
|
}
|
|
|
|
static inline TCGTemp *arg_temp(TCGArg a)
|
|
{
|
|
return (TCGTemp *)(uintptr_t)a;
|
|
}
|
|
|
|
/* Using the offset of a temporary, relative to TCGContext, rather than
|
|
its index means that we don't use 0. That leaves offset 0 free for
|
|
a NULL representation without having to leave index 0 unused. */
|
|
static inline TCGTemp *tcgv_i32_temp(TCGv_i32 v)
|
|
{
|
|
uintptr_t o = (uintptr_t)v;
|
|
TCGTemp *t = (void *)tcg_ctx + o;
|
|
tcg_debug_assert(offsetof(TCGContext, temps[temp_idx(t)]) == o);
|
|
return t;
|
|
}
|
|
|
|
static inline TCGTemp *tcgv_i64_temp(TCGv_i64 v)
|
|
{
|
|
return tcgv_i32_temp((TCGv_i32)v);
|
|
}
|
|
|
|
static inline TCGTemp *tcgv_ptr_temp(TCGv_ptr v)
|
|
{
|
|
return tcgv_i32_temp((TCGv_i32)v);
|
|
}
|
|
|
|
static inline TCGTemp *tcgv_vec_temp(TCGv_vec v)
|
|
{
|
|
return tcgv_i32_temp((TCGv_i32)v);
|
|
}
|
|
|
|
static inline TCGArg tcgv_i32_arg(TCGv_i32 v)
|
|
{
|
|
return temp_arg(tcgv_i32_temp(v));
|
|
}
|
|
|
|
static inline TCGArg tcgv_i64_arg(TCGv_i64 v)
|
|
{
|
|
return temp_arg(tcgv_i64_temp(v));
|
|
}
|
|
|
|
static inline TCGArg tcgv_ptr_arg(TCGv_ptr v)
|
|
{
|
|
return temp_arg(tcgv_ptr_temp(v));
|
|
}
|
|
|
|
static inline TCGArg tcgv_vec_arg(TCGv_vec v)
|
|
{
|
|
return temp_arg(tcgv_vec_temp(v));
|
|
}
|
|
|
|
static inline TCGv_i32 temp_tcgv_i32(TCGTemp *t)
|
|
{
|
|
(void)temp_idx(t); /* trigger embedded assert */
|
|
return (TCGv_i32)((void *)t - (void *)tcg_ctx);
|
|
}
|
|
|
|
static inline TCGv_i64 temp_tcgv_i64(TCGTemp *t)
|
|
{
|
|
return (TCGv_i64)temp_tcgv_i32(t);
|
|
}
|
|
|
|
static inline TCGv_ptr temp_tcgv_ptr(TCGTemp *t)
|
|
{
|
|
return (TCGv_ptr)temp_tcgv_i32(t);
|
|
}
|
|
|
|
static inline TCGv_vec temp_tcgv_vec(TCGTemp *t)
|
|
{
|
|
return (TCGv_vec)temp_tcgv_i32(t);
|
|
}
|
|
|
|
#if TCG_TARGET_REG_BITS == 32
|
|
static inline TCGv_i32 TCGV_LOW(TCGv_i64 t)
|
|
{
|
|
return temp_tcgv_i32(tcgv_i64_temp(t));
|
|
}
|
|
|
|
static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t)
|
|
{
|
|
return temp_tcgv_i32(tcgv_i64_temp(t) + 1);
|
|
}
|
|
#endif
|
|
|
|
static inline TCGArg tcg_get_insn_param(TCGOp *op, int arg)
|
|
{
|
|
return op->args[arg];
|
|
}
|
|
|
|
static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v)
|
|
{
|
|
op->args[arg] = v;
|
|
}
|
|
|
|
static inline target_ulong tcg_get_insn_start_param(TCGOp *op, int arg)
|
|
{
|
|
#if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
|
|
return tcg_get_insn_param(op, arg);
|
|
#else
|
|
return tcg_get_insn_param(op, arg * 2) |
|
|
((uint64_t)tcg_get_insn_param(op, arg * 2 + 1) << 32);
|
|
#endif
|
|
}
|
|
|
|
static inline void tcg_set_insn_start_param(TCGOp *op, int arg, target_ulong v)
|
|
{
|
|
#if TARGET_LONG_BITS <= TCG_TARGET_REG_BITS
|
|
tcg_set_insn_param(op, arg, v);
|
|
#else
|
|
tcg_set_insn_param(op, arg * 2, v);
|
|
tcg_set_insn_param(op, arg * 2 + 1, v >> 32);
|
|
#endif
|
|
}
|
|
|
|
/* The last op that was emitted. */
|
|
static inline TCGOp *tcg_last_op(void)
|
|
{
|
|
return QTAILQ_LAST(&tcg_ctx->ops);
|
|
}
|
|
|
|
/* Test for whether to terminate the TB for using too many opcodes. */
|
|
static inline bool tcg_op_buf_full(void)
|
|
{
|
|
/* This is not a hard limit, it merely stops translation when
|
|
* we have produced "enough" opcodes. We want to limit TB size
|
|
* such that a RISC host can reasonably use a 16-bit signed
|
|
* branch within the TB. We also need to be mindful of the
|
|
* 16-bit unsigned offsets, TranslationBlock.jmp_reset_offset[]
|
|
* and TCGContext.gen_insn_end_off[].
|
|
*/
|
|
return tcg_ctx->nb_ops >= 4000;
|
|
}
|
|
|
|
/* pool based memory allocation */
|
|
|
|
/* user-mode: mmap_lock must be held for tcg_malloc_internal. */
|
|
void *tcg_malloc_internal(TCGContext *s, int size);
|
|
void tcg_pool_reset(TCGContext *s);
|
|
TranslationBlock *tcg_tb_alloc(TCGContext *s);
|
|
|
|
void tb_destroy(TranslationBlock *tb);
|
|
void tcg_region_reset_all(void);
|
|
|
|
size_t tcg_code_size(void);
|
|
size_t tcg_code_capacity(void);
|
|
|
|
void tcg_tb_insert(TranslationBlock *tb);
|
|
void tcg_tb_remove(TranslationBlock *tb);
|
|
size_t tcg_tb_phys_invalidate_count(void);
|
|
TranslationBlock *tcg_tb_lookup(uintptr_t tc_ptr);
|
|
void tcg_tb_foreach(GTraverseFunc func, gpointer user_data);
|
|
size_t tcg_nb_tbs(void);
|
|
|
|
/* user-mode: Called with mmap_lock held. */
|
|
static inline void *tcg_malloc(int size)
|
|
{
|
|
TCGContext *s = tcg_ctx;
|
|
uint8_t *ptr, *ptr_end;
|
|
|
|
/* ??? This is a weak placeholder for minimum malloc alignment. */
|
|
size = QEMU_ALIGN_UP(size, 8);
|
|
|
|
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_init(size_t tb_size, int splitwx, unsigned max_cpus);
|
|
void tcg_register_thread(void);
|
|
void tcg_prologue_init(TCGContext *s);
|
|
void tcg_func_start(TCGContext *s);
|
|
|
|
int tcg_gen_code(TCGContext *s, TranslationBlock *tb);
|
|
|
|
void tcg_set_frame(TCGContext *s, TCGReg reg, intptr_t start, intptr_t size);
|
|
|
|
TCGTemp *tcg_global_mem_new_internal(TCGType, TCGv_ptr,
|
|
intptr_t, const char *);
|
|
TCGTemp *tcg_temp_new_internal(TCGType, bool);
|
|
void tcg_temp_free_internal(TCGTemp *);
|
|
TCGv_vec tcg_temp_new_vec(TCGType type);
|
|
TCGv_vec tcg_temp_new_vec_matching(TCGv_vec match);
|
|
|
|
static inline void tcg_temp_free_i32(TCGv_i32 arg)
|
|
{
|
|
tcg_temp_free_internal(tcgv_i32_temp(arg));
|
|
}
|
|
|
|
static inline void tcg_temp_free_i64(TCGv_i64 arg)
|
|
{
|
|
tcg_temp_free_internal(tcgv_i64_temp(arg));
|
|
}
|
|
|
|
static inline void tcg_temp_free_ptr(TCGv_ptr arg)
|
|
{
|
|
tcg_temp_free_internal(tcgv_ptr_temp(arg));
|
|
}
|
|
|
|
static inline void tcg_temp_free_vec(TCGv_vec arg)
|
|
{
|
|
tcg_temp_free_internal(tcgv_vec_temp(arg));
|
|
}
|
|
|
|
static inline TCGv_i32 tcg_global_mem_new_i32(TCGv_ptr reg, intptr_t offset,
|
|
const char *name)
|
|
{
|
|
TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
|
|
return temp_tcgv_i32(t);
|
|
}
|
|
|
|
static inline TCGv_i32 tcg_temp_new_i32(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, false);
|
|
return temp_tcgv_i32(t);
|
|
}
|
|
|
|
static inline TCGv_i32 tcg_temp_local_new_i32(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I32, true);
|
|
return temp_tcgv_i32(t);
|
|
}
|
|
|
|
static inline TCGv_i64 tcg_global_mem_new_i64(TCGv_ptr reg, intptr_t offset,
|
|
const char *name)
|
|
{
|
|
TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
|
|
return temp_tcgv_i64(t);
|
|
}
|
|
|
|
static inline TCGv_i64 tcg_temp_new_i64(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, false);
|
|
return temp_tcgv_i64(t);
|
|
}
|
|
|
|
static inline TCGv_i64 tcg_temp_local_new_i64(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_I64, true);
|
|
return temp_tcgv_i64(t);
|
|
}
|
|
|
|
static inline TCGv_ptr tcg_global_mem_new_ptr(TCGv_ptr reg, intptr_t offset,
|
|
const char *name)
|
|
{
|
|
TCGTemp *t = tcg_global_mem_new_internal(TCG_TYPE_PTR, reg, offset, name);
|
|
return temp_tcgv_ptr(t);
|
|
}
|
|
|
|
static inline TCGv_ptr tcg_temp_new_ptr(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, false);
|
|
return temp_tcgv_ptr(t);
|
|
}
|
|
|
|
static inline TCGv_ptr tcg_temp_local_new_ptr(void)
|
|
{
|
|
TCGTemp *t = tcg_temp_new_internal(TCG_TYPE_PTR, true);
|
|
return temp_tcgv_ptr(t);
|
|
}
|
|
|
|
#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
|
|
|
|
int64_t tcg_cpu_exec_time(void);
|
|
void tcg_dump_info(void);
|
|
void tcg_dump_op_count(void);
|
|
|
|
#define TCG_CT_CONST 1 /* any constant of register size */
|
|
|
|
typedef struct TCGArgConstraint {
|
|
unsigned ct : 16;
|
|
unsigned alias_index : 4;
|
|
unsigned sort_index : 4;
|
|
bool oalias : 1;
|
|
bool ialias : 1;
|
|
bool newreg : 1;
|
|
TCGRegSet regs;
|
|
} TCGArgConstraint;
|
|
|
|
#define TCG_MAX_OP_ARGS 16
|
|
|
|
/* Bits for TCGOpDef->flags, 8 bits available, all used. */
|
|
enum {
|
|
/* Instruction exits the translation block. */
|
|
TCG_OPF_BB_EXIT = 0x01,
|
|
/* Instruction defines the end of a basic block. */
|
|
TCG_OPF_BB_END = 0x02,
|
|
/* Instruction clobbers call registers and potentially update globals. */
|
|
TCG_OPF_CALL_CLOBBER = 0x04,
|
|
/* Instruction has side effects: it cannot be removed if its outputs
|
|
are not used, and might trigger exceptions. */
|
|
TCG_OPF_SIDE_EFFECTS = 0x08,
|
|
/* Instruction operands are 64-bits (otherwise 32-bits). */
|
|
TCG_OPF_64BIT = 0x10,
|
|
/* 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 = 0x20,
|
|
/* Instruction operands are vectors. */
|
|
TCG_OPF_VECTOR = 0x40,
|
|
/* Instruction is a conditional branch. */
|
|
TCG_OPF_COND_BRANCH = 0x80
|
|
};
|
|
|
|
typedef struct TCGOpDef {
|
|
const char *name;
|
|
uint8_t nb_oargs, nb_iargs, nb_cargs, nb_args;
|
|
uint8_t flags;
|
|
TCGArgConstraint *args_ct;
|
|
} 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)
|
|
|
|
bool tcg_op_supported(TCGOpcode op);
|
|
|
|
void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args);
|
|
|
|
TCGOp *tcg_emit_op(TCGOpcode opc);
|
|
void tcg_op_remove(TCGContext *s, TCGOp *op);
|
|
TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc);
|
|
TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc);
|
|
|
|
void tcg_optimize(TCGContext *s);
|
|
|
|
/* Allocate a new temporary and initialize it with a constant. */
|
|
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);
|
|
TCGv_vec tcg_const_zeros_vec(TCGType);
|
|
TCGv_vec tcg_const_ones_vec(TCGType);
|
|
TCGv_vec tcg_const_zeros_vec_matching(TCGv_vec);
|
|
TCGv_vec tcg_const_ones_vec_matching(TCGv_vec);
|
|
|
|
/*
|
|
* Locate or create a read-only temporary that is a constant.
|
|
* This kind of temporary need not and should not be freed.
|
|
*/
|
|
TCGTemp *tcg_constant_internal(TCGType type, int64_t val);
|
|
|
|
static inline TCGv_i32 tcg_constant_i32(int32_t val)
|
|
{
|
|
return temp_tcgv_i32(tcg_constant_internal(TCG_TYPE_I32, val));
|
|
}
|
|
|
|
static inline TCGv_i64 tcg_constant_i64(int64_t val)
|
|
{
|
|
return temp_tcgv_i64(tcg_constant_internal(TCG_TYPE_I64, val));
|
|
}
|
|
|
|
TCGv_vec tcg_constant_vec(TCGType type, unsigned vece, int64_t val);
|
|
TCGv_vec tcg_constant_vec_matching(TCGv_vec match, unsigned vece, int64_t val);
|
|
|
|
#if UINTPTR_MAX == UINT32_MAX
|
|
# define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i32((intptr_t)(x)))
|
|
# define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i32((intptr_t)(x)))
|
|
#else
|
|
# define tcg_const_ptr(x) ((TCGv_ptr)tcg_const_i64((intptr_t)(x)))
|
|
# define tcg_const_local_ptr(x) ((TCGv_ptr)tcg_const_local_i64((intptr_t)(x)))
|
|
#endif
|
|
|
|
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(const void *a, const 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, const void *target)
|
|
{
|
|
return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_ptr));
|
|
}
|
|
|
|
/**
|
|
* tcg_tbrel_diff
|
|
* @s: the tcg context
|
|
* @target: address of the target
|
|
*
|
|
* Produce a difference, from the beginning of the current TB code
|
|
* to the destination address.
|
|
*/
|
|
static inline ptrdiff_t tcg_tbrel_diff(TCGContext *s, const void *target)
|
|
{
|
|
return tcg_ptr_byte_diff(target, tcg_splitwx_to_rx(s->code_buf));
|
|
}
|
|
|
|
/**
|
|
* 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 MemOp 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(MemOp 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 MemOp 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: pointer to 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.
|
|
*
|
|
* Return: The return value is the value passed to the corresponding
|
|
* tcg_gen_exit_tb() at translation time of the last TB attempted to execute.
|
|
* The value is either zero or a 4-byte aligned pointer to that TB combined
|
|
* with additional information in its two least significant bits. The
|
|
* additional information is encoded as follows:
|
|
* 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 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 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 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
|
|
* to this default (which just calls the prologue.code emitted by
|
|
* tcg_target_qemu_prologue()).
|
|
*/
|
|
#define TB_EXIT_MASK 3
|
|
#define TB_EXIT_IDX0 0
|
|
#define TB_EXIT_IDX1 1
|
|
#define TB_EXIT_IDXMAX 1
|
|
#define TB_EXIT_REQUESTED 3
|
|
|
|
#ifdef CONFIG_TCG_INTERPRETER
|
|
uintptr_t tcg_qemu_tb_exec(CPUArchState *env, const void *tb_ptr);
|
|
#else
|
|
typedef uintptr_t tcg_prologue_fn(CPUArchState *env, const void *tb_ptr);
|
|
extern tcg_prologue_fn *tcg_qemu_tb_exec;
|
|
#endif
|
|
|
|
void tcg_register_jit(const void *buf, size_t buf_size);
|
|
|
|
#if TCG_TARGET_MAYBE_vec
|
|
/* Return zero if the tuple (opc, type, vece) is unsupportable;
|
|
return > 0 if it is directly supportable;
|
|
return < 0 if we must call tcg_expand_vec_op. */
|
|
int tcg_can_emit_vec_op(TCGOpcode, TCGType, unsigned);
|
|
#else
|
|
static inline int tcg_can_emit_vec_op(TCGOpcode o, TCGType t, unsigned ve)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* Expand the tuple (opc, type, vece) on the given arguments. */
|
|
void tcg_expand_vec_op(TCGOpcode, TCGType, unsigned, TCGArg, ...);
|
|
|
|
/* Replicate a constant C accoring to the log2 of the element size. */
|
|
uint64_t dup_const(unsigned vece, uint64_t c);
|
|
|
|
#define dup_const(VECE, C) \
|
|
(__builtin_constant_p(VECE) \
|
|
? ( (VECE) == MO_8 ? 0x0101010101010101ull * (uint8_t)(C) \
|
|
: (VECE) == MO_16 ? 0x0001000100010001ull * (uint16_t)(C) \
|
|
: (VECE) == MO_32 ? 0x0000000100000001ull * (uint32_t)(C) \
|
|
: (VECE) == MO_64 ? (uint64_t)(C) \
|
|
: (qemu_build_not_reached_always(), 0)) \
|
|
: dup_const(VECE, C))
|
|
|
|
|
|
/*
|
|
* Memory helpers that will be used by TCG generated code.
|
|
*/
|
|
#ifdef CONFIG_SOFTMMU
|
|
/* Value zero-extended to tcg register size. */
|
|
tcg_target_ulong helper_ret_ldub_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_le_lduw_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_le_ldul_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint64_t helper_le_ldq_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_be_lduw_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_be_ldul_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
uint64_t helper_be_ldq_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
|
|
/* Value sign-extended to tcg register size. */
|
|
tcg_target_ulong helper_ret_ldsb_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_le_ldsw_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_le_ldsl_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_be_ldsw_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
|
|
void helper_ret_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_le_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_le_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_le_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_be_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_be_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
|
|
TCGMemOpIdx oi, uintptr_t retaddr);
|
|
void helper_be_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
|
|
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
|
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# define helper_ret_stl_mmu helper_be_stl_mmu
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# define helper_ret_stq_mmu helper_be_stq_mmu
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#else
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# define helper_ret_ldsw_mmu helper_le_ldsw_mmu
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# define helper_ret_lduw_mmu helper_le_lduw_mmu
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# define helper_ret_ldsl_mmu helper_le_ldsl_mmu
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# define helper_ret_ldul_mmu helper_le_ldul_mmu
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# define helper_ret_ldl_mmu helper_le_ldul_mmu
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# define helper_ret_ldq_mmu helper_le_ldq_mmu
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# define helper_ret_stw_mmu helper_le_stw_mmu
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# define helper_ret_stl_mmu helper_le_stl_mmu
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# define helper_ret_stq_mmu helper_le_stq_mmu
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#endif
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uint32_t helper_atomic_cmpxchgb_mmu(CPUArchState *env, target_ulong addr,
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uint32_t cmpv, uint32_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint32_t helper_atomic_cmpxchgw_le_mmu(CPUArchState *env, target_ulong addr,
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uint32_t cmpv, uint32_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint32_t helper_atomic_cmpxchgl_le_mmu(CPUArchState *env, target_ulong addr,
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uint32_t cmpv, uint32_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint64_t helper_atomic_cmpxchgq_le_mmu(CPUArchState *env, target_ulong addr,
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uint64_t cmpv, uint64_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint32_t helper_atomic_cmpxchgw_be_mmu(CPUArchState *env, target_ulong addr,
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uint32_t cmpv, uint32_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint32_t helper_atomic_cmpxchgl_be_mmu(CPUArchState *env, target_ulong addr,
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uint32_t cmpv, uint32_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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uint64_t helper_atomic_cmpxchgq_be_mmu(CPUArchState *env, target_ulong addr,
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uint64_t cmpv, uint64_t newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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#define GEN_ATOMIC_HELPER(NAME, TYPE, SUFFIX) \
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TYPE helper_atomic_ ## NAME ## SUFFIX ## _mmu \
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(CPUArchState *env, target_ulong addr, TYPE val, \
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TCGMemOpIdx oi, uintptr_t retaddr);
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#ifdef CONFIG_ATOMIC64
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#define GEN_ATOMIC_HELPER_ALL(NAME) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, b) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, l_be) \
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GEN_ATOMIC_HELPER(NAME, uint64_t, q_le) \
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GEN_ATOMIC_HELPER(NAME, uint64_t, q_be)
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#else
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#define GEN_ATOMIC_HELPER_ALL(NAME) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, b) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, w_le) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, w_be) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, l_le) \
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GEN_ATOMIC_HELPER(NAME, uint32_t, l_be)
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#endif
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GEN_ATOMIC_HELPER_ALL(fetch_add)
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GEN_ATOMIC_HELPER_ALL(fetch_sub)
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GEN_ATOMIC_HELPER_ALL(fetch_and)
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GEN_ATOMIC_HELPER_ALL(fetch_or)
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GEN_ATOMIC_HELPER_ALL(fetch_xor)
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GEN_ATOMIC_HELPER_ALL(fetch_smin)
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GEN_ATOMIC_HELPER_ALL(fetch_umin)
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GEN_ATOMIC_HELPER_ALL(fetch_smax)
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GEN_ATOMIC_HELPER_ALL(fetch_umax)
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GEN_ATOMIC_HELPER_ALL(add_fetch)
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GEN_ATOMIC_HELPER_ALL(sub_fetch)
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GEN_ATOMIC_HELPER_ALL(and_fetch)
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GEN_ATOMIC_HELPER_ALL(or_fetch)
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GEN_ATOMIC_HELPER_ALL(xor_fetch)
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GEN_ATOMIC_HELPER_ALL(smin_fetch)
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GEN_ATOMIC_HELPER_ALL(umin_fetch)
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GEN_ATOMIC_HELPER_ALL(smax_fetch)
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GEN_ATOMIC_HELPER_ALL(umax_fetch)
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GEN_ATOMIC_HELPER_ALL(xchg)
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#undef GEN_ATOMIC_HELPER_ALL
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#undef GEN_ATOMIC_HELPER
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#endif /* CONFIG_SOFTMMU */
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/*
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* These aren't really a "proper" helpers because TCG cannot manage Int128.
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* However, use the same format as the others, for use by the backends.
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*
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* The cmpxchg functions are only defined if HAVE_CMPXCHG128;
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* the ld/st functions are only defined if HAVE_ATOMIC128,
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* as defined by <qemu/atomic128.h>.
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*/
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Int128 helper_atomic_cmpxchgo_le_mmu(CPUArchState *env, target_ulong addr,
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Int128 cmpv, Int128 newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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Int128 helper_atomic_cmpxchgo_be_mmu(CPUArchState *env, target_ulong addr,
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Int128 cmpv, Int128 newv,
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TCGMemOpIdx oi, uintptr_t retaddr);
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Int128 helper_atomic_ldo_le_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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Int128 helper_atomic_ldo_be_mmu(CPUArchState *env, target_ulong addr,
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TCGMemOpIdx oi, uintptr_t retaddr);
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void helper_atomic_sto_le_mmu(CPUArchState *env, target_ulong addr, Int128 val,
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TCGMemOpIdx oi, uintptr_t retaddr);
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void helper_atomic_sto_be_mmu(CPUArchState *env, target_ulong addr, Int128 val,
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TCGMemOpIdx oi, uintptr_t retaddr);
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#ifdef CONFIG_DEBUG_TCG
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void tcg_assert_listed_vecop(TCGOpcode);
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#else
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static inline void tcg_assert_listed_vecop(TCGOpcode op) { }
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#endif
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static inline const TCGOpcode *tcg_swap_vecop_list(const TCGOpcode *n)
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{
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#ifdef CONFIG_DEBUG_TCG
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const TCGOpcode *o = tcg_ctx->vecop_list;
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tcg_ctx->vecop_list = n;
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return o;
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#else
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return NULL;
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#endif
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}
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bool tcg_can_emit_vecop_list(const TCGOpcode *, TCGType, unsigned);
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#endif /* TCG_H */
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