iree/vm/value.h

// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef IREE_VM_VALUE_H_
#define IREE_VM_VALUE_H_

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus

// Defines the type of a primitive value.
typedef enum {
  // Not a value type.
  IREE_VM_VALUE_TYPE_NONE = 0,
  // int8_t.
  IREE_VM_VALUE_TYPE_I8 = 1,
  // int16_t.
  IREE_VM_VALUE_TYPE_I16 = 2,
  // int32_t.
  IREE_VM_VALUE_TYPE_I32 = 3,
  // int64_t.
  IREE_VM_VALUE_TYPE_I64 = 4,

  IREE_VM_VALUE_TYPE_MAX = IREE_VM_VALUE_TYPE_I64,
  IREE_VM_VALUE_TYPE_COUNT = IREE_VM_VALUE_TYPE_MAX + 1,
} iree_vm_value_type_t;

// Maximum size, in bytes, of any value type we can represent.
#define IREE_VM_VALUE_STORAGE_SIZE 8

// A variant value type.
typedef struct iree_vm_value {
  iree_vm_value_type_t type;
  union {
    int8_t i8;
    int16_t i16;
    int32_t i32;
    int64_t i64;

    uint8_t value_storage[IREE_VM_VALUE_STORAGE_SIZE];  // max size of all value
                                                        // types
  };
} iree_vm_value_t;

static inline iree_vm_value_t iree_vm_value_make_i32(int32_t value) {
  iree_vm_value_t result;
  result.type = IREE_VM_VALUE_TYPE_I32;
  result.i32 = value;
  return result;
}

static inline iree_vm_value_t iree_vm_value_make_i64(int64_t value) {
  iree_vm_value_t result;
  result.type = IREE_VM_VALUE_TYPE_I64;
  result.i64 = value;
  return result;
}

#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus

#endif  // IREE_VM_VALUE_H_