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68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* TCG Helper Information Structure
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*
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* Copyright (c) 2023 Linaro Ltd
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef TCG_HELPER_INFO_H
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#define TCG_HELPER_INFO_H
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#ifdef CONFIG_TCG_INTERPRETER
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#include <ffi.h>
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#endif
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#include "tcg-target-reg-bits.h"
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#define MAX_CALL_IARGS 7
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/*
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* Describe the calling convention of a given argument type.
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*/
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typedef enum {
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TCG_CALL_RET_NORMAL, /* by registers */
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TCG_CALL_RET_BY_REF, /* for i128, by reference */
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TCG_CALL_RET_BY_VEC, /* for i128, by vector register */
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} TCGCallReturnKind;
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typedef enum {
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TCG_CALL_ARG_NORMAL, /* by registers (continuing onto stack) */
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TCG_CALL_ARG_EVEN, /* like normal, but skipping odd slots */
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TCG_CALL_ARG_EXTEND, /* for i32, as a sign/zero-extended i64 */
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TCG_CALL_ARG_EXTEND_U, /* ... as a zero-extended i64 */
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TCG_CALL_ARG_EXTEND_S, /* ... as a sign-extended i64 */
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TCG_CALL_ARG_BY_REF, /* for i128, by reference, first */
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TCG_CALL_ARG_BY_REF_N, /* ... by reference, subsequent */
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} TCGCallArgumentKind;
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typedef struct TCGCallArgumentLoc {
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TCGCallArgumentKind kind : 8;
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unsigned arg_slot : 8;
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unsigned ref_slot : 8;
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unsigned arg_idx : 4;
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unsigned tmp_subindex : 2;
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} TCGCallArgumentLoc;
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struct TCGHelperInfo {
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void *func;
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const char *name;
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/* Used with g_once_init_enter. */
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#ifdef CONFIG_TCG_INTERPRETER
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ffi_cif *cif;
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#else
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uintptr_t init;
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#endif
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unsigned typemask : 32;
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unsigned flags : 8;
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unsigned nr_in : 8;
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unsigned nr_out : 8;
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TCGCallReturnKind out_kind : 8;
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/* Maximum physical arguments are constrained by TCG_TYPE_I128. */
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TCGCallArgumentLoc in[MAX_CALL_IARGS * (128 / TCG_TARGET_REG_BITS)];
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};
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#endif /* TCG_HELPER_INFO_H */
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