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307 lines
12 KiB
307 lines
12 KiB
/* This file is a part of MIR project.
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Copyright (C) 2018-2020 Vladimir Makarov <vmakarov.gcc@gmail.com>.
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ppc64 call ABI target specific code.
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*/
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typedef int target_arg_info_t;
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static void target_init_arg_vars (c2m_ctx_t c2m_ctx, target_arg_info_t *arg_info) {}
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#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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static MIR_type_t fp_homogeneous_type (c2m_ctx_t c2m_ctx, struct type *param_type, int *num) {
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return MIR_T_UNDEF;
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}
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#else
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static MIR_type_t fp_homogeneous_type_1 (c2m_ctx_t c2m_ctx, MIR_type_t curr_type, struct type *type,
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int *num) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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int n;
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MIR_type_t t;
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if (type->mode == TM_STRUCT || type->mode == TM_UNION || type->mode == TM_ARR) {
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switch (type->mode) {
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case TM_ARR: { /* Arrays are handled as small records. */
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struct arr_type *arr_type = type->u.arr_type;
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struct expr *cexpr = arr_type->size->attr;
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if ((t = fp_homogeneous_type_1 (c2m_ctx, curr_type, type->u.arr_type->el_type, &n))
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== MIR_T_UNDEF)
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return MIR_T_UNDEF;
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*num = arr_type->size->code == N_IGNORE || !cexpr->const_p ? 1 : cexpr->u.i_val;
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return t;
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}
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case TM_STRUCT:
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case TM_UNION:
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t = curr_type;
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*num = 0;
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for (node_t el = NL_HEAD (NL_EL (type->u.tag_type->u.ops, 1)->u.ops); el != NULL;
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el = NL_NEXT (el))
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if (el->code == N_MEMBER) {
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decl_t decl = el->attr;
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if ((t = fp_homogeneous_type_1 (c2m_ctx, t, decl->decl_spec.type, &n)) == MIR_T_UNDEF)
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return MIR_T_UNDEF;
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if (type->mode == TM_STRUCT)
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*num += n;
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else if (*num < n)
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*num = n;
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}
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return t;
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default: assert (FALSE);
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}
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}
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assert (scalar_type_p (type));
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if ((t = get_mir_type (c2m_ctx, type)) != MIR_T_F && t != MIR_T_D) return MIR_T_UNDEF;
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if (curr_type != t && curr_type != MIR_T_UNDEF) return MIR_T_UNDEF;
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*num = 1;
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return t;
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}
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static MIR_type_t fp_homogeneous_type (c2m_ctx_t c2m_ctx, struct type *param_type, int *num) {
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if (param_type->mode != TM_STRUCT && param_type->mode != TM_UNION) return MIR_T_UNDEF;
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return fp_homogeneous_type_1 (c2m_ctx, MIR_T_UNDEF, param_type, num);
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}
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#endif
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static int reg_aggregate_p (c2m_ctx_t c2m_ctx, struct type *ret_type) {
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#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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return FALSE;
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#else
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return type_size (c2m_ctx, ret_type) <= 2 * 8;
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#endif
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}
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static int target_return_by_addr_p (c2m_ctx_t c2m_ctx, struct type *ret_type) {
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MIR_type_t type;
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int n;
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if (ret_type->mode != TM_STRUCT && ret_type->mode != TM_UNION) return FALSE;
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if (((type = fp_homogeneous_type (c2m_ctx, ret_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8)
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return FALSE;
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return !reg_aggregate_p (c2m_ctx, ret_type);
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}
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static void target_add_res_proto (c2m_ctx_t c2m_ctx, struct type *ret_type,
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target_arg_info_t *arg_info, VARR (MIR_type_t) * res_types,
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VARR (MIR_var_t) * arg_vars) {
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MIR_var_t var;
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MIR_type_t type;
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int i, n, size;
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if (void_type_p (ret_type)) return;
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if (((type = fp_homogeneous_type (c2m_ctx, ret_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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for (i = 0; i < n; i++) VARR_PUSH (MIR_type_t, res_types, type);
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} else if (ret_type->mode != TM_STRUCT && ret_type->mode != TM_UNION) {
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VARR_PUSH (MIR_type_t, res_types, get_mir_type (c2m_ctx, ret_type));
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} else if (reg_aggregate_p (c2m_ctx, ret_type)) {
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size = type_size (c2m_ctx, ret_type);
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for (; size > 0; size -= 8) VARR_PUSH (MIR_type_t, res_types, MIR_T_I64);
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} else {
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var.name = RET_ADDR_NAME;
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var.type = MIR_T_RBLK;
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var.size = type_size (c2m_ctx, ret_type);
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VARR_PUSH (MIR_var_t, arg_vars, var);
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}
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}
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static int target_add_call_res_op (c2m_ctx_t c2m_ctx, struct type *ret_type,
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target_arg_info_t *arg_info, size_t call_arg_area_offset) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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MIR_context_t ctx = c2m_ctx->ctx;
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MIR_type_t type;
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op_t temp;
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int i, n, size;
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if (void_type_p (ret_type)) return -1;
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if (((type = fp_homogeneous_type (c2m_ctx, ret_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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for (i = 0; i < n; i++) {
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temp = get_new_temp (c2m_ctx, type);
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VARR_PUSH (MIR_op_t, call_ops, temp.mir_op);
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}
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return n;
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} else if (ret_type->mode != TM_STRUCT && ret_type->mode != TM_UNION) {
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type = get_mir_type (c2m_ctx, ret_type);
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type = promote_mir_int_type (type);
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temp = get_new_temp (c2m_ctx, type);
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VARR_PUSH (MIR_op_t, call_ops, temp.mir_op);
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return 1;
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} else if (reg_aggregate_p (c2m_ctx, ret_type)) {
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size = type_size (c2m_ctx, ret_type);
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if (size == 0) return -1;
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for (int s = size; s > 0; s -= 8) {
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temp = get_new_temp (c2m_ctx, MIR_T_I64);
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VARR_PUSH (MIR_op_t, call_ops, temp.mir_op);
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}
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return (size + 7) / 8;
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} else {
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temp = get_new_temp (c2m_ctx, MIR_T_I64);
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emit3 (c2m_ctx, MIR_ADD, temp.mir_op,
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MIR_new_reg_op (ctx, MIR_reg (ctx, FP_NAME, curr_func->u.func)),
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MIR_new_int_op (ctx, call_arg_area_offset));
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temp.mir_op
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= MIR_new_mem_op (ctx, MIR_T_RBLK, type_size (c2m_ctx, ret_type), temp.mir_op.u.reg, 0, 1);
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VARR_PUSH (MIR_op_t, call_ops, temp.mir_op);
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return 0;
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}
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}
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static op_t target_gen_post_call_res_code (c2m_ctx_t c2m_ctx, struct type *ret_type, op_t res,
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MIR_insn_t call, size_t call_ops_start) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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MIR_context_t ctx = c2m_ctx->ctx;
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MIR_type_t type;
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MIR_insn_t insn;
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int i, n;
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if (void_type_p (ret_type)) return res;
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if (((type = fp_homogeneous_type (c2m_ctx, ret_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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assert (res.mir_op.mode == MIR_OP_MEM);
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for (i = 0; i < n; i++) {
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insn = MIR_new_insn (ctx, tp_mov (type),
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MIR_new_mem_op (ctx, type,
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res.mir_op.u.mem.disp + (type == MIR_T_F ? 4 : 8) * i,
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res.mir_op.u.mem.base, res.mir_op.u.mem.index,
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res.mir_op.u.mem.scale),
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VARR_GET (MIR_op_t, call_ops, i + call_ops_start + 2));
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MIR_append_insn (ctx, curr_func, insn);
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}
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} else if ((ret_type->mode == TM_STRUCT || ret_type->mode == TM_UNION)
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&& reg_aggregate_p (c2m_ctx, ret_type)) {
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assert (res.mir_op.mode == MIR_OP_MEM); /* addr */
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gen_multiple_load_store (c2m_ctx, ret_type, &VARR_ADDR (MIR_op_t, call_ops)[call_ops_start + 2],
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res.mir_op, FALSE);
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}
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return res;
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}
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static void target_add_ret_ops (c2m_ctx_t c2m_ctx, struct type *ret_type, op_t res) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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MIR_context_t ctx = c2m_ctx->ctx;
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MIR_type_t type;
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MIR_insn_t insn;
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MIR_reg_t ret_addr_reg;
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op_t temp, var;
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int i, n, size;
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if (void_type_p (ret_type)) return;
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if (((type = fp_homogeneous_type (c2m_ctx, ret_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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assert (res.mir_op.mode == MIR_OP_MEM);
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for (int i = 0; i < n; i++) {
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temp = get_new_temp (c2m_ctx, type);
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insn = MIR_new_insn (ctx, tp_mov (type), temp.mir_op,
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MIR_new_mem_op (ctx, type,
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res.mir_op.u.mem.disp + (type == MIR_T_F ? 4 : 8) * i,
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res.mir_op.u.mem.base, res.mir_op.u.mem.index,
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res.mir_op.u.mem.scale));
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MIR_append_insn (ctx, curr_func, insn);
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VARR_PUSH (MIR_op_t, ret_ops, temp.mir_op);
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}
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} else if (ret_type->mode != TM_STRUCT && ret_type->mode != TM_UNION) {
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VARR_PUSH (MIR_op_t, ret_ops, res.mir_op);
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} else if (reg_aggregate_p (c2m_ctx, ret_type)) {
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size = type_size (c2m_ctx, ret_type);
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assert (res.mir_op.mode == MIR_OP_MEM && VARR_LENGTH (MIR_op_t, ret_ops) == 0);
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for (int i = 0; size > 0; size -= 8, i++)
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VARR_PUSH (MIR_op_t, ret_ops, get_new_temp (c2m_ctx, MIR_T_I64).mir_op);
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gen_multiple_load_store (c2m_ctx, ret_type, &VARR_ADDR (MIR_op_t, ret_ops)[0], res.mir_op,
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TRUE);
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} else {
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ret_addr_reg = MIR_reg (ctx, RET_ADDR_NAME, curr_func->u.func);
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var = new_op (NULL, MIR_new_mem_op (ctx, MIR_T_I8, 0, ret_addr_reg, 0, 1));
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size = type_size (c2m_ctx, ret_type);
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block_move (c2m_ctx, var, res, size);
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}
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}
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static void target_add_arg_proto (c2m_ctx_t c2m_ctx, const char *name, struct type *arg_type,
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target_arg_info_t *arg_info, VARR (MIR_var_t) * arg_vars) {
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MIR_var_t var;
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MIR_type_t type;
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int n;
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if (((type = fp_homogeneous_type (c2m_ctx, arg_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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for (int i = 0; i < n; i++) {
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var.name = gen_get_indexed_name (c2m_ctx, name, i);
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var.type = type;
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VARR_PUSH (MIR_var_t, arg_vars, var);
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}
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return;
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}
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type = (arg_type->mode == TM_STRUCT || arg_type->mode == TM_UNION
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? MIR_T_BLK
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: get_mir_type (c2m_ctx, arg_type));
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var.name = name;
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var.type = type;
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if (type == MIR_T_BLK) var.size = type_size (c2m_ctx, arg_type);
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VARR_PUSH (MIR_var_t, arg_vars, var);
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}
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static void target_add_call_arg_op (c2m_ctx_t c2m_ctx, struct type *arg_type,
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target_arg_info_t *arg_info, op_t arg) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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MIR_context_t ctx = c2m_ctx->ctx;
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MIR_var_t var;
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MIR_type_t type;
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op_t temp;
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int n;
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if (((type = fp_homogeneous_type (c2m_ctx, arg_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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assert (arg.mir_op.mode == MIR_OP_MEM);
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arg = mem_to_address (c2m_ctx, arg, TRUE);
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for (int i = 0; i < n; i++) {
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temp = get_new_temp (c2m_ctx, type);
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MIR_append_insn (ctx, curr_func,
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MIR_new_insn (ctx, tp_mov (type), temp.mir_op,
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MIR_new_mem_op (ctx, type, (type == MIR_T_F ? 4 : 8) * i,
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arg.mir_op.u.reg, 0, 1)));
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VARR_PUSH (MIR_op_t, call_ops, temp.mir_op);
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}
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return;
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}
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if (arg_type->mode != TM_STRUCT && arg_type->mode != TM_UNION) {
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VARR_PUSH (MIR_op_t, call_ops, arg.mir_op);
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} else {
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assert (arg.mir_op.mode == MIR_OP_MEM);
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arg = mem_to_address (c2m_ctx, arg, TRUE);
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VARR_PUSH (MIR_op_t, call_ops,
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MIR_new_mem_op (ctx, MIR_T_BLK, type_size (c2m_ctx, arg_type), arg.mir_op.u.reg, 0,
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1));
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}
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}
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static int target_gen_gather_arg (c2m_ctx_t c2m_ctx, const char *name, struct type *arg_type,
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decl_t param_decl, target_arg_info_t *arg_info) {
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gen_ctx_t gen_ctx = c2m_ctx->gen_ctx;
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MIR_context_t ctx = c2m_ctx->ctx;
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MIR_var_t var;
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MIR_type_t type;
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reg_var_t reg_var;
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int i, n;
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if (((type = fp_homogeneous_type (c2m_ctx, arg_type, &n)) == MIR_T_F || type == MIR_T_D)
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&& n <= 8) {
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for (i = 0; i < n; i++) {
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assert (!param_decl->reg_p);
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reg_var = get_reg_var (c2m_ctx, type, gen_get_indexed_name (c2m_ctx, name, i));
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MIR_append_insn (ctx, curr_func,
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MIR_new_insn (ctx, tp_mov (type),
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MIR_new_mem_op (ctx, type,
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param_decl->offset
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+ (type == MIR_T_F ? 4 : 8) * i,
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MIR_reg (ctx, FP_NAME, curr_func->u.func), 0,
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1),
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MIR_new_reg_op (ctx, reg_var.reg)));
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}
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return TRUE;
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}
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return FALSE;
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}
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