diff options
Diffstat (limited to 'crypto/ppccap.c')
-rw-r--r-- | crypto/ppccap.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/crypto/ppccap.c b/crypto/ppccap.c new file mode 100644 index 0000000000..6fac797ff5 --- /dev/null +++ b/crypto/ppccap.c @@ -0,0 +1,88 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <setjmp.h> +#include <signal.h> +#include <openssl/bn.h> + +#define PPC_FPU64 (1<<0) + +static int OPENSSL_ppccap_P = 0; + +static sigset_t all_masked; + +int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np, const BN_ULONG *n0, int num) + { + int bn_mul_mont_fpu64(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np, const BN_ULONG *n0, int num); + int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_ULONG *np, const BN_ULONG *n0, int num); + + if (sizeof(size_t)==4) + { +#if (defined(__APPLE__) && defined(__MACH__)) + if ((OPENSSL_ppccap_P&PPC_FPU64)) + return bn_mul_mont_fpu64(rp,ap,bp,np,n0,num); +#else + /* boundary of 32 was experimentally determined on + Linux 2.6.22, might have to be adjusted on AIX... */ + if ((num>=32) && (OPENSSL_ppccap_P&PPC_FPU64)) + { + sigset_t oset; + int ret; + + sigprocmask(SIG_SETMASK,&all_masked,&oset); + ret=bn_mul_mont_fpu64(rp,ap,bp,np,n0,num); + sigprocmask(SIG_SETMASK,&oset,NULL); + + return ret; + } +#endif + } + else if ((OPENSSL_ppccap_P&PPC_FPU64)) + /* this is a "must" on Power 6, but run-time detection + * is not implemented yet... */ + return bn_mul_mont_fpu64(rp,ap,bp,np,n0,num); + + return bn_mul_mont_int(rp,ap,bp,np,n0,num); + } + +static sigjmp_buf ill_jmp; +static void ill_handler (int sig) { siglongjmp(ill_jmp,sig); } + +void OPENSSL_cpuid_setup(void) + { + char *e; + + sigfillset(&all_masked); + sigdelset(&all_masked,SIGSEGV); + sigdelset(&all_masked,SIGILL); + + if ((e=getenv("OPENSSL_ppccap"))) + { + OPENSSL_ppccap_P=strtoul(e,NULL,0); + return; + } + + if (sizeof(size_t)==4) + { + struct sigaction ill_oact,ill_act; + sigset_t oset; + + memset(&ill_act,0,sizeof(ill_act)); + ill_act.sa_handler = ill_handler; + sigfillset(&ill_act.sa_mask); + sigdelset(&ill_act.sa_mask,SIGILL); + sigprocmask(SIG_SETMASK,&ill_act.sa_mask,&oset); + sigaction (SIGILL,&ill_act,&ill_oact); + if (sigsetjmp(ill_jmp,0) == 0) + { + OPENSSL_ppc64_probe(); + OPENSSL_ppccap_P |= PPC_FPU64; + } + else + { + OPENSSL_ppccap_P &= ~PPC_FPU64; + } + sigaction (SIGILL,&ill_oact,NULL); + sigprocmask(SIG_SETMASK,&oset,NULL); + } + } |