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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <unistd.h>
#include <crypto.h>
#include <openssl/bn.h>
#define PPC_FPU64 (1<<0)
#define PPC_ALTIVEC (1<<1)
static int OPENSSL_ppccap_P = 0;
static sigset_t all_masked;
#ifdef OPENSSL_BN_ASM_MONT
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 (num >= 8 && (num&3) == 0 && (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 && (num&3) == 0 && (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 POWER6, 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);
}
#endif
static sigjmp_buf ill_jmp;
static void ill_handler (int sig)
{
siglongjmp(ill_jmp, sig);
}
void OPENSSL_ppc64_probe(void);
void OPENSSL_altivec_probe(void);
void
OPENSSL_cpuid_setup(void)
{
char *e;
struct sigaction ill_oact, ill_act;
sigset_t oset;
static int trigger = 0;
if (trigger)
return;
trigger = 1;
sigfillset(&all_masked);
sigdelset(&all_masked, SIGILL);
sigdelset(&all_masked, SIGTRAP);
#ifdef SIGEMT
sigdelset(&all_masked, SIGEMT);
#endif
sigdelset(&all_masked, SIGFPE);
sigdelset(&all_masked, SIGBUS);
sigdelset(&all_masked, SIGSEGV);
if ((e = getenv("OPENSSL_ppccap"))) {
OPENSSL_ppccap_P = strtoul(e, NULL, 0);
return;
}
OPENSSL_ppccap_P = 0;
#if defined(_AIX)
if (sizeof(size_t) == 4
# if defined(_SC_AIX_KERNEL_BITMODE)
&& sysconf(_SC_AIX_KERNEL_BITMODE) != 64
# endif
)
return;
#endif
memset(&ill_act, 0, sizeof(ill_act));
ill_act.sa_handler = ill_handler;
ill_act.sa_mask = all_masked;
sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
sigaction(SIGILL, &ill_act, &ill_oact);
if (sizeof(size_t) == 4) {
if (sigsetjmp(ill_jmp, 1) == 0) {
OPENSSL_ppc64_probe();
OPENSSL_ppccap_P |= PPC_FPU64;
}
} else {
/*
* Wanted code detecting POWER6 CPU and setting PPC_FPU64
*/
}
if (sigsetjmp(ill_jmp, 1) == 0) {
OPENSSL_altivec_probe();
OPENSSL_ppccap_P |= PPC_ALTIVEC;
}
sigaction (SIGILL, &ill_oact, NULL);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
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