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/*
* TCG Helper Infomation Structure
*
* Copyright (c) 2023 Linaro Ltd
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef TCG_HELPER_INFO_H
#define TCG_HELPER_INFO_H
#ifdef CONFIG_TCG_INTERPRETER
#include <ffi.h>
#endif
/*
* Describe the calling convention of a given argument type.
*/
typedef enum {
TCG_CALL_RET_NORMAL, /* by registers */
TCG_CALL_RET_BY_REF, /* for i128, by reference */
TCG_CALL_RET_BY_VEC, /* for i128, by vector register */
} TCGCallReturnKind;
typedef enum {
TCG_CALL_ARG_NORMAL, /* by registers (continuing onto stack) */
TCG_CALL_ARG_EVEN, /* like normal, but skipping odd slots */
TCG_CALL_ARG_EXTEND, /* for i32, as a sign/zero-extended i64 */
TCG_CALL_ARG_EXTEND_U, /* ... as a zero-extended i64 */
TCG_CALL_ARG_EXTEND_S, /* ... as a sign-extended i64 */
TCG_CALL_ARG_BY_REF, /* for i128, by reference, first */
TCG_CALL_ARG_BY_REF_N, /* ... by reference, subsequent */
} TCGCallArgumentKind;
typedef struct TCGCallArgumentLoc {
TCGCallArgumentKind kind : 8;
unsigned arg_slot : 8;
unsigned ref_slot : 8;
unsigned arg_idx : 4;
unsigned tmp_subindex : 2;
} TCGCallArgumentLoc;
struct TCGHelperInfo {
void *func;
const char *name;
/* Used with g_once_init_enter. */
#ifdef CONFIG_TCG_INTERPRETER
ffi_cif *cif;
#else
uintptr_t init;
#endif
unsigned typemask : 32;
unsigned flags : 8;
unsigned nr_in : 8;
unsigned nr_out : 8;
TCGCallReturnKind out_kind : 8;
/* Maximum physical arguments are constrained by TCG_TYPE_I128. */
TCGCallArgumentLoc in[MAX_CALL_IARGS * (128 / TCG_TARGET_REG_BITS)];
};
#endif /* TCG_HELPER_INFO_H */
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