/*
 * Internal declarations for Tiny Code Generator for QEMU
 *
 * Copyright (c) 2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef TCG_INTERNAL_H
#define TCG_INTERNAL_H

#include "tcg/helper-info.h"

#define TCG_HIGHWATER 1024

extern TCGContext tcg_init_ctx;
extern TCGContext **tcg_ctxs;
extern unsigned int tcg_cur_ctxs;
extern unsigned int tcg_max_ctxs;

void tcg_region_init(size_t tb_size, int splitwx, unsigned max_cpus);
bool tcg_region_alloc(TCGContext *s);
void tcg_region_initial_alloc(TCGContext *s);
void tcg_region_prologue_set(TCGContext *s);

static inline void *tcg_call_func(TCGOp *op)
{
    return (void *)(uintptr_t)op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op)];
}

static inline const TCGHelperInfo *tcg_call_info(TCGOp *op)
{
    return (void *)(uintptr_t)op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op) + 1];
}

static inline unsigned tcg_call_flags(TCGOp *op)
{
    return tcg_call_info(op)->flags;
}

#if TCG_TARGET_REG_BITS == 32
static inline TCGv_i32 TCGV_LOW(TCGv_i64 t)
{
    return temp_tcgv_i32(tcgv_i64_temp(t) + HOST_BIG_ENDIAN);
}
static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t)
{
    return temp_tcgv_i32(tcgv_i64_temp(t) + !HOST_BIG_ENDIAN);
}
#else
extern TCGv_i32 TCGV_LOW(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
extern TCGv_i32 TCGV_HIGH(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
#endif

static inline TCGv_i64 TCGV128_LOW(TCGv_i128 t)
{
    /* For 32-bit, offset by 2, which may then have TCGV_{LOW,HIGH} applied. */
    int o = HOST_BIG_ENDIAN ? 64 / TCG_TARGET_REG_BITS : 0;
    return temp_tcgv_i64(tcgv_i128_temp(t) + o);
}

static inline TCGv_i64 TCGV128_HIGH(TCGv_i128 t)
{
    int o = HOST_BIG_ENDIAN ? 0 : 64 / TCG_TARGET_REG_BITS;
    return temp_tcgv_i64(tcgv_i128_temp(t) + o);
}

bool tcg_target_has_memory_bswap(MemOp memop);

#endif /* TCG_INTERNAL_H */