lib/libcrypto/ppccap.c

   1 /* $OpenBSD: ppccap.c,v 1.6 2014/07/17 23:48:24 deraadt Exp $ */
   2
   3 #include <sys/types.h>
   4 #include <sys/sysctl.h>
   5 #include <machine/cpu.h>
   6 #include <unistd.h>
   7
   8 #include <crypto.h>
   9 #include <openssl/bn.h>
  10
  11 #ifdef unused
  12 #define PPC_FPU64       (1<<0)
  13 #define PPC_ALTIVEC     (1<<1)
  14
  15 static int OPENSSL_ppccap_P = 0;
  16 #endif
  17
  18 #ifdef OPENSSL_BN_ASM_MONT
  19 extern int bn_mul_mont_int(BN_ULONG *, const BN_ULONG *, const BN_ULONG *,
  20             const BN_ULONG *, const BN_ULONG *, int);
  21 int
  22 bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
  23     const BN_ULONG *np, const BN_ULONG *n0, int num)
  24 {
  25         return bn_mul_mont_int(rp, ap, bp, np, n0, num);
  26 }
  27 #endif
  28
  29 #ifdef unused
  30 void OPENSSL_cpuid_setup(void) __attribute__((constructor));
  31
  32 void
  33 OPENSSL_cpuid_setup(void)
  34 {
  35         static const int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
  36         static int trigger = 0;
  37         int altivec = 0;
  38         size_t size;
  39
  40         if (trigger)
  41                 return;
  42         trigger = 1;
  43
  44         size = sizeof altivec;
  45         if (sysctl(mib, 2, &altivec, &size, NULL, 0) != -1) {
  46                 if (altivec != 0)
  47                         OPENSSL_ppccap_P |= PPC_ALTIVEC;
  48         }
  49 }
  50 #endif