#if defined(__ia64__) || (defined(__x86_64__) && !defined(__ILP32__)) ||\
defined(__aarch64__) || defined(__PPC64__) ||\
- defined(__s390x__)
+ defined(__s390x__) ||\
+ (defined(__riscv) && (defined(__LP64__) || defined(_LP64)))
#define ACPI_MACHINE_WIDTH 64
#define COMPILER_DEPENDENT_INT64 long
#define COMPILER_DEPENDENT_UINT64 unsigned long