text: /* Copyright (c) 2016-2018 Ristretto Developers, Cryptography Research, Inc.
   * Released under the MIT License.  See LICENSE.txt for license information.
   */
  
  #ifndef __ARCH_NEON_ARCH_INTRINSICS_H__
  #define __ARCH_NEON_ARCH_INTRINSICS_H__
  
  #define ARCH_WORD_BITS 32
  
  static __inline__ __attribute((always_inline, unused))
  uint32_t word_is_zero(uint32_t a) {
  	uint32_t ret;
  	__asm__("subs %0, %1, #1;\n\tsbc %0, %0, %0" : "=r"(ret) : "r"(a) : "cc");
  	return ret;
  }
  
  static __inline__ __attribute((always_inline, unused))
  uint64_t widemul(uint32_t a, uint32_t b) {
  	/* Could be UMULL, but it's hard to express to CC that the registers must be different */
  	return ((uint64_t) a) * b;
  }
  
  #endif /* __ARCH_NEON_ARCH_INTRINSICS_H__ */
  
  