99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* $OpenBSD: sparcv9cap.c,v 1.7 2014/06/20 21:00:46 deraadt Exp $ */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <setjmp.h>
|
|
#include <signal.h>
|
|
#include <sys/time.h>
|
|
#include <openssl/bn.h>
|
|
|
|
#define SPARCV9_PREFER_FPU (1<<1)
|
|
#define SPARCV9_VIS1 (1<<2)
|
|
#define SPARCV9_VIS2 (1<<3) /* reserved */
|
|
#define SPARCV9_FMADD (1<<4) /* reserved for SPARC64 V */
|
|
|
|
static int OPENSSL_sparcv9cap_P = 0;
|
|
|
|
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_fpu(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 (num >= 8 && !(num & 1) &&
|
|
(OPENSSL_sparcv9cap_P & (SPARCV9_PREFER_FPU|SPARCV9_VIS1)) ==
|
|
(SPARCV9_PREFER_FPU|SPARCV9_VIS1))
|
|
return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
|
|
else
|
|
return bn_mul_mont_int(rp, ap, bp, np, n0, num);
|
|
}
|
|
|
|
void _sparcv9_vis1_probe(void);
|
|
unsigned long _sparcv9_vis1_instrument(void);
|
|
void _sparcv9_vis2_probe(void);
|
|
void _sparcv9_fmadd_probe(void);
|
|
|
|
static sigjmp_buf common_jmp;
|
|
static void
|
|
common_handler(int sig)
|
|
{
|
|
siglongjmp(common_jmp, sig);
|
|
}
|
|
|
|
void
|
|
OPENSSL_cpuid_setup(void)
|
|
{
|
|
char *e;
|
|
struct sigaction common_act, ill_oact, bus_oact;
|
|
sigset_t all_masked, oset;
|
|
static int trigger = 0;
|
|
|
|
if (trigger)
|
|
return;
|
|
trigger = 1;
|
|
|
|
/* Initial value, fits UltraSPARC-I&II... */
|
|
OPENSSL_sparcv9cap_P = SPARCV9_PREFER_FPU;
|
|
|
|
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);
|
|
sigprocmask(SIG_SETMASK, &all_masked, &oset);
|
|
|
|
memset(&common_act, 0, sizeof(common_act));
|
|
common_act.sa_handler = common_handler;
|
|
common_act.sa_mask = all_masked;
|
|
|
|
sigaction(SIGILL, &common_act, &ill_oact);
|
|
sigaction(SIGBUS,&common_act,&bus_oact);/* T1 fails 16-bit ldda [on Linux] */
|
|
|
|
if (sigsetjmp(common_jmp, 1) == 0) {
|
|
_sparcv9_vis1_probe();
|
|
OPENSSL_sparcv9cap_P |= SPARCV9_VIS1;
|
|
/* detect UltraSPARC-Tx, see sparccpud.S for details... */
|
|
if (_sparcv9_vis1_instrument() >= 12)
|
|
OPENSSL_sparcv9cap_P &= ~(SPARCV9_VIS1|SPARCV9_PREFER_FPU);
|
|
else {
|
|
_sparcv9_vis2_probe();
|
|
OPENSSL_sparcv9cap_P |= SPARCV9_VIS2;
|
|
}
|
|
}
|
|
|
|
if (sigsetjmp(common_jmp, 1) == 0) {
|
|
_sparcv9_fmadd_probe();
|
|
OPENSSL_sparcv9cap_P |= SPARCV9_FMADD;
|
|
}
|
|
|
|
sigaction(SIGBUS, &bus_oact, NULL);
|
|
sigaction(SIGILL, &ill_oact, NULL);
|
|
|
|
sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
}
|