1 /* 2 * TCG Helper Information Structure 3 * 4 * Copyright (c) 2023 Linaro Ltd 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #ifndef TCG_HELPER_INFO_H 10 #define TCG_HELPER_INFO_H 11 12 #ifdef CONFIG_TCG_INTERPRETER 13 #include <ffi.h> 14 #endif 15 16 /* 17 * Describe the calling convention of a given argument type. 18 */ 19 typedef enum { 20 TCG_CALL_RET_NORMAL, /* by registers */ 21 TCG_CALL_RET_BY_REF, /* for i128, by reference */ 22 TCG_CALL_RET_BY_VEC, /* for i128, by vector register */ 23 } TCGCallReturnKind; 24 25 typedef enum { 26 TCG_CALL_ARG_NORMAL, /* by registers (continuing onto stack) */ 27 TCG_CALL_ARG_EVEN, /* like normal, but skipping odd slots */ 28 TCG_CALL_ARG_EXTEND, /* for i32, as a sign/zero-extended i64 */ 29 TCG_CALL_ARG_EXTEND_U, /* ... as a zero-extended i64 */ 30 TCG_CALL_ARG_EXTEND_S, /* ... as a sign-extended i64 */ 31 TCG_CALL_ARG_BY_REF, /* for i128, by reference, first */ 32 TCG_CALL_ARG_BY_REF_N, /* ... by reference, subsequent */ 33 } TCGCallArgumentKind; 34 35 typedef struct TCGCallArgumentLoc { 36 TCGCallArgumentKind kind : 8; 37 unsigned arg_slot : 8; 38 unsigned ref_slot : 8; 39 unsigned arg_idx : 4; 40 unsigned tmp_subindex : 2; 41 } TCGCallArgumentLoc; 42 43 struct TCGHelperInfo { 44 void *func; 45 const char *name; 46 47 /* Used with g_once_init_enter. */ 48 #ifdef CONFIG_TCG_INTERPRETER 49 ffi_cif *cif; 50 #else 51 uintptr_t init; 52 #endif 53 54 unsigned typemask : 32; 55 unsigned flags : 8; 56 unsigned nr_in : 8; 57 unsigned nr_out : 8; 58 TCGCallReturnKind out_kind : 8; 59 60 /* Maximum physical arguments are constrained by TCG_TYPE_I128. */ 61 TCGCallArgumentLoc in[MAX_CALL_IARGS * (128 / TCG_TARGET_REG_BITS)]; 62 }; 63 64 #endif /* TCG_HELPER_INFO_H */ 65