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/* $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);
}
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