1  #include <sparc-ifunc.h>
       2  
       3  #define __sha256_process_block __sha256_process_block_generic
       4  extern void __sha256_process_block_generic (const void *buffer, size_t len,
       5  					    struct sha256_ctx *ctx);
       6  
       7  #include <crypt/sha256-block.c>
       8  
       9  #undef __sha256_process_block
      10  
      11  extern void __sha256_process_block_crop (const void *buffer, size_t len,
      12  					 struct sha256_ctx *ctx);
      13  
      14  static bool cpu_supports_sha256(int hwcap)
      15  {
      16    unsigned long cfr;
      17  
      18    if (!(hwcap & HWCAP_SPARC_CRYPTO))
      19      return false;
      20  
      21    __asm__ ("rd %%asr26, %0" : "=r" (cfr));
      22    if (cfr & (1 << 6))
      23      return true;
      24  
      25    return false;
      26  }
      27  
      28  extern void __sha256_process_block (const void *buffer, size_t len,
      29  				    struct sha256_ctx *ctx);
      30  sparc_libc_ifunc (__sha256_process_block,
      31  		  cpu_supports_sha256(hwcap) ? __sha256_process_block_crop
      32  		    : __sha256_process_block_generic);