[thirdparty/openssl.git] / crypto / sparcv9cap.c

/*
 * Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <signal.h>
#include <sys/time.h>
#include <unistd.h>
#include <openssl/bn.h>
#include "internal/cryptlib.h"
#include "bn/bn_local.h"    /* for definition of bn_mul_mont */

#include "sparc_arch.h"

#if defined(__GNUC__) && defined(__linux)
__attribute__ ((visibility("hidden")))
#endif
unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 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_vis3(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 & 1) && num >= 6) {
        if ((num & 15) == 0 && num <= 64 &&
            (OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) ==
            (CFR_MONTMUL | CFR_MONTSQR)) {
            typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap,
                                          const BN_ULONG *bp,
                                          const BN_ULONG *np,
                                          const BN_ULONG *n0);
            int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap,
                                 const BN_ULONG *bp, const BN_ULONG *np,
                                 const BN_ULONG *n0);
            int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap,
                                  const BN_ULONG *bp, const BN_ULONG *np,
                                  const BN_ULONG *n0);
            int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap,
                                  const BN_ULONG *bp, const BN_ULONG *np,
                                  const BN_ULONG *n0);
            int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap,
                                  const BN_ULONG *bp, const BN_ULONG *np,
                                  const BN_ULONG *n0);
            static const bn_mul_mont_f funcs[4] = {
                bn_mul_mont_t4_8, bn_mul_mont_t4_16,
                bn_mul_mont_t4_24, bn_mul_mont_t4_32
            };
            bn_mul_mont_f worker = funcs[num / 16 - 1];

            if ((*worker) (rp, ap, bp, np, n0))
                return 1;
            /* retry once and fall back */
            if ((*worker) (rp, ap, bp, np, n0))
                return 1;
            return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
        }
        if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3))
            return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
        else if (num >= 8 &&
                 /*
                  * bn_mul_mont_fpu doesn't use FMADD, we just use the
                  * flag to detect when FPU path is preferable in cases
                  * when current heuristics is unreliable. [it works
                  * out because FMADD-capable processors where FPU
                  * code path is undesirable are also VIS3-capable and
                  * VIS3 code path takes precedence.]
                  */
                 ( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) ||
                   (OPENSSL_sparcv9cap_P[0] &
                    (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) ==
                   (SPARCV9_PREFER_FPU | SPARCV9_VIS1) ))
            return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
    }
    return bn_mul_mont_int(rp, ap, bp, np, n0, num);
}

unsigned long _sparcv9_rdtick(void);
void _sparcv9_vis1_probe(void);
unsigned long _sparcv9_vis1_instrument(void);
void _sparcv9_vis2_probe(void);
void _sparcv9_fmadd_probe(void);
unsigned long _sparcv9_rdcfr(void);
void _sparcv9_vis3_probe(void);
void _sparcv9_fjaesx_probe(void);
unsigned long _sparcv9_random(void);
size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);
size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);

uint32_t OPENSSL_rdtsc(void)
{
    if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)
#if defined(__sun) && defined(__SVR4)
        return gethrtime();
#else
        return 0;
#endif
    else
        return _sparcv9_rdtick();
}

size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
{
    if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
        SPARCV9_BLK)
        return _sparcv9_vis1_instrument_bus(out, cnt);
    else
        return 0;
}

size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
{
    if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
        SPARCV9_BLK)
        return _sparcv9_vis1_instrument_bus2(out, cnt, max);
    else
        return 0;
}

static sigjmp_buf common_jmp;
static void common_handler(int sig)
{
    siglongjmp(common_jmp, sig);
}

#if defined(__sun) && defined(__SVR4)
# if defined(__GNUC__) && __GNUC__>=2
extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
# elif defined(__SUNPRO_C)
#pragma weak getisax
extern unsigned int getisax(unsigned int vec[], unsigned int sz);
# else
static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
# endif
#endif

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;

    if ((e = getenv("OPENSSL_sparcv9cap"))) {
        OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);
        if ((e = strchr(e, ':')))
            OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);
        return;
    }

#if defined(__sun) && defined(__SVR4)
    if (getisax != NULL) {
        unsigned int vec[2] = { 0, 0 };

        if (getisax (vec,2)) {
            if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;
            if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
            if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;
            if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
            if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
            if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE;
            if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX;
            if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA;
            if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
            if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4;

            /* reconstruct %cfr copy */
            OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
            OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
            if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C;
            if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL;
            if (vec[1]&0x00000040)
                OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR;

            /* Some heuristics */
            /* all known VIS2-capable CPUs have unprivileged tick counter */
            if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
                OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;

            OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU;

            /* detect UltraSPARC-Tx, see sparccpud.S for details... */
            if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
                _sparcv9_vis1_instrument() >= 12)
                OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
        }

        if (sizeof(size_t) == 8)
            OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;

        return;
    }
#endif

    /* Initial value, fits UltraSPARC-I&II... */
    OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED;

    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_rdtick();
        OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
    }

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_vis1_probe();
        OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK;
        /* detect UltraSPARC-Tx, see sparccpud.S for details... */
        if (_sparcv9_vis1_instrument() >= 12)
            OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
        else {
            _sparcv9_vis2_probe();
            OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
        }
    }

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_fmadd_probe();
        OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
    }

    /*
     * VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
     * because VIS3 defines even integer instructions.
     */
    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_vis3_probe();
        OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
    }

    if (sigsetjmp(common_jmp, 1) == 0) {
        _sparcv9_fjaesx_probe();
        OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
    }

    /*
     * In wait for better solution _sparcv9_rdcfr is masked by
     * VIS3 flag, because it goes to uninterruptible endless
     * loop on UltraSPARC II running Solaris. Things might be
     * different on Linux...
     */
    if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&
        sigsetjmp(common_jmp, 1) == 0) {
        OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
    }

    sigaction(SIGBUS, &bus_oact, NULL);
    sigaction(SIGILL, &ill_oact, NULL);

    sigprocmask(SIG_SETMASK, &oset, NULL);

    if (sizeof(size_t) == 8)
        OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
# ifdef __linux
    else {
        int ret = syscall(340);

        if (ret >= 0 && ret & 1)
            OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
    }
# endif
}
Commit	Line	Data
b1322259	1	/*
33388b44	2	* Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved.
b1322259	3	*
0e9725bc	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
c06b0f3d AP	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <string.h>
c32fcca6 AP	13	#include <setjmp.h>
c32fcca6 AP	14	#include <signal.h>
c06b0f3d	15	#include <sys/time.h>
68c06bf6	16	#include <unistd.h>
c06b0f3d	17	#include <openssl/bn.h>
d807db26	18	#include "internal/cryptlib.h"
64fac96d	19	#include "bn/bn_local.h" /* for definition of bn_mul_mont */
c06b0f3d	20
1fda639a	21	#include "sparc_arch.h"
c32fcca6	22
1fda639a	23	#if defined(__GNUC__) && defined(__linux)
0f113f3e	24	__attribute__ ((visibility("hidden")))
1fda639a	25	#endif
0f113f3e MC	26	unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };
	27
	28	int bn_mul_mont(BN_ULONG rp, const BN_ULONG ap, const BN_ULONG *bp,
	29	const BN_ULONG np, const BN_ULONG n0, int num)
	30	{
	31	int bn_mul_mont_vis3(BN_ULONG rp, const BN_ULONG ap, const BN_ULONG *bp,
	32	const BN_ULONG np, const BN_ULONG n0, int num);
	33	int bn_mul_mont_fpu(BN_ULONG rp, const BN_ULONG ap, const BN_ULONG *bp,
	34	const BN_ULONG np, const BN_ULONG n0, int num);
	35	int bn_mul_mont_int(BN_ULONG rp, const BN_ULONG ap, const BN_ULONG *bp,
	36	const BN_ULONG np, const BN_ULONG n0, int num);
	37
	38	if (!(num & 1) && num >= 6) {
	39	if ((num & 15) == 0 && num <= 64 &&
	40	(OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL \| CFR_MONTSQR)) ==
	41	(CFR_MONTMUL \| CFR_MONTSQR)) {
	42	typedef int (bn_mul_mont_f) (BN_ULONG rp, const BN_ULONG *ap,
	43	const BN_ULONG *bp,
	44	const BN_ULONG *np,
	45	const BN_ULONG *n0);
	46	int bn_mul_mont_t4_8(BN_ULONG rp, const BN_ULONG ap,
	47	const BN_ULONG bp, const BN_ULONG np,
	48	const BN_ULONG *n0);
	49	int bn_mul_mont_t4_16(BN_ULONG rp, const BN_ULONG ap,
	50	const BN_ULONG bp, const BN_ULONG np,
	51	const BN_ULONG *n0);
	52	int bn_mul_mont_t4_24(BN_ULONG rp, const BN_ULONG ap,
	53	const BN_ULONG bp, const BN_ULONG np,
	54	const BN_ULONG *n0);
	55	int bn_mul_mont_t4_32(BN_ULONG rp, const BN_ULONG ap,
	56	const BN_ULONG bp, const BN_ULONG np,
	57	const BN_ULONG *n0);
	58	static const bn_mul_mont_f funcs[4] = {
	59	bn_mul_mont_t4_8, bn_mul_mont_t4_16,
	60	bn_mul_mont_t4_24, bn_mul_mont_t4_32
	61	};
	62	bn_mul_mont_f worker = funcs[num / 16 - 1];
	63
	64	if ((*worker) (rp, ap, bp, np, n0))
	65	return 1;
	66	/* retry once and fall back */
	67	if ((*worker) (rp, ap, bp, np, n0))
	68	return 1;
	69	return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
	70	}
	71	if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3))
	72	return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
	73	else if (num >= 8 &&
33ea23dc AP	74	/*
	75	* bn_mul_mont_fpu doesn't use FMADD, we just use the
	76	* flag to detect when FPU path is preferable in cases
	77	* when current heuristics is unreliable. [it works
	78	* out because FMADD-capable processors where FPU
	79	* code path is undesirable are also VIS3-capable and
	80	* VIS3 code path takes precedence.]
	81	*/
	82	( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) \|\|
	83	(OPENSSL_sparcv9cap_P[0] &
	84	(SPARCV9_PREFER_FPU \| SPARCV9_VIS1)) ==
	85	(SPARCV9_PREFER_FPU \| SPARCV9_VIS1) ))
0f113f3e MC	86	return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
	87	}
	88	return bn_mul_mont_int(rp, ap, bp, np, n0, num);
	89	}
	90
	91	unsigned long _sparcv9_rdtick(void);
	92	void _sparcv9_vis1_probe(void);
	93	unsigned long _sparcv9_vis1_instrument(void);
	94	void _sparcv9_vis2_probe(void);
	95	void _sparcv9_fmadd_probe(void);
	96	unsigned long _sparcv9_rdcfr(void);
	97	void _sparcv9_vis3_probe(void);
d40a13af	98	void _sparcv9_fjaesx_probe(void);
0f113f3e MC	99	unsigned long _sparcv9_random(void);
	100	size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);
	101	size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);
c32fcca6	102
d807db26	103	uint32_t OPENSSL_rdtsc(void)
0f113f3e MC	104	{
0f113f3e MC	105	if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)
c06b0f3d	106	#if defined(__sun) && defined(__SVR4)
0f113f3e	107	return gethrtime();
c06b0f3d	108	#else
0f113f3e	109	return 0;
c06b0f3d	110	#endif
0f113f3e MC	111	else
	112	return _sparcv9_rdtick();
	113	}
	114
	115	size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
	116	{
	117	if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED \| SPARCV9_BLK)) ==
	118	SPARCV9_BLK)
	119	return _sparcv9_vis1_instrument_bus(out, cnt);
	120	else
	121	return 0;
	122	}
	123
	124	size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
	125	{
	126	if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED \| SPARCV9_BLK)) ==
	127	SPARCV9_BLK)
	128	return _sparcv9_vis1_instrument_bus2(out, cnt, max);
	129	else
	130	return 0;
	131	}
5fabb88a	132
c32fcca6	133	static sigjmp_buf common_jmp;
0f113f3e MC	134	static void common_handler(int sig)
	135	{
	136	siglongjmp(common_jmp, sig);
	137	}
c32fcca6	138
2238e0e4 AP	139	#if defined(__sun) && defined(__SVR4)
	140	# if defined(__GNUC__) && __GNUC__>=2
	141	extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
	142	# elif defined(__SUNPRO_C)
	143	#pragma weak getisax
	144	extern unsigned int getisax(unsigned int vec[], unsigned int sz);
	145	# else
	146	static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
	147	# endif
	148	#endif
	149
5d7324e4	150	void OPENSSL_cpuid_setup(void)
0f113f3e MC	151	{
	152	char *e;
	153	struct sigaction common_act, ill_oact, bus_oact;
	154	sigset_t all_masked, oset;
	155	static int trigger = 0;
	156
	157	if (trigger)
	158	return;
	159	trigger = 1;
	160
	161	if ((e = getenv("OPENSSL_sparcv9cap"))) {
	162	OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);
	163	if ((e = strchr(e, ':')))
	164	OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);
	165	return;
	166	}
	167
2238e0e4 AP	168	#if defined(__sun) && defined(__SVR4)
2238e0e4 AP	169	if (getisax != NULL) {
a5a95f8d	170	unsigned int vec[2] = { 0, 0 };
2238e0e4	171
a5a95f8d	172	if (getisax (vec,2)) {
299ccadc AP	173	if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS1;
	174	if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS2;
	175	if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_BLK;
	176	if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FMADD;
	177	if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS3;
	178	if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJHPCACE;
	179	if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJDESX;
	180	if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_IMA;
4400f6c6	181	if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJAESX;
299ccadc	182	if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS4;
2238e0e4 AP	183
	184	/* reconstruct %cfr copy */
	185	OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
	186	OPENSSL_sparcv9cap_P[1] \|= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
	187	if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] \|= CFR_CRC32C;
299ccadc AP	188	if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] \|= CFR_XMPMUL;
	189	if (vec[1]&0x00000040)
	190	OPENSSL_sparcv9cap_P[1] \|= CFR_XMONTMUL\|CFR_XMONTSQR;
2238e0e4 AP	191
	192	/* Some heuristics */
	193	/* all known VIS2-capable CPUs have unprivileged tick counter */
	194	if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
	195	OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
	196
	197	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_PREFER_FPU;
	198
	199	/* detect UltraSPARC-Tx, see sparccpud.S for details... */
	200	if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
	201	_sparcv9_vis1_instrument() >= 12)
	202	OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 \| SPARCV9_PREFER_FPU);
	203	}
	204
	205	if (sizeof(size_t) == 8)
	206	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	207
	208	return;
	209	}
	210	#endif
	211
0f113f3e MC	212	/* Initial value, fits UltraSPARC-I&II... */
	213	OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU \| SPARCV9_TICK_PRIVILEGED;
	214
	215	sigfillset(&all_masked);
	216	sigdelset(&all_masked, SIGILL);
	217	sigdelset(&all_masked, SIGTRAP);
	218	# ifdef SIGEMT
	219	sigdelset(&all_masked, SIGEMT);
	220	# endif
	221	sigdelset(&all_masked, SIGFPE);
	222	sigdelset(&all_masked, SIGBUS);
	223	sigdelset(&all_masked, SIGSEGV);
	224	sigprocmask(SIG_SETMASK, &all_masked, &oset);
	225
	226	memset(&common_act, 0, sizeof(common_act));
	227	common_act.sa_handler = common_handler;
	228	common_act.sa_mask = all_masked;
	229
	230	sigaction(SIGILL, &common_act, &ill_oact);
	231	sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on
	232	* Linux] */
	233
	234	if (sigsetjmp(common_jmp, 1) == 0) {
	235	_sparcv9_rdtick();
	236	OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
	237	}
	238
	239	if (sigsetjmp(common_jmp, 1) == 0) {
	240	_sparcv9_vis1_probe();
	241	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS1 \| SPARCV9_BLK;
	242	/* detect UltraSPARC-Tx, see sparccpud.S for details... */
	243	if (_sparcv9_vis1_instrument() >= 12)
	244	OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 \| SPARCV9_PREFER_FPU);
	245	else {
	246	_sparcv9_vis2_probe();
	247	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS2;
	248	}
	249	}
	250
	251	if (sigsetjmp(common_jmp, 1) == 0) {
	252	_sparcv9_fmadd_probe();
	253	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FMADD;
	254	}
	255
	256	/*
	257	* VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
	258	* because VIS3 defines even integer instructions.
	259	*/
	260	if (sigsetjmp(common_jmp, 1) == 0) {
	261	_sparcv9_vis3_probe();
	262	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS3;
	263	}
0f113f3e	264
4400f6c6 AP	265	if (sigsetjmp(common_jmp, 1) == 0) {
	266	_sparcv9_fjaesx_probe();
	267	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJAESX;
	268	}
	269
0f113f3e MC	270	/*
0f113f3e MC	271	* In wait for better solution _sparcv9_rdcfr is masked by
7fa8bcfe	272	* VIS3 flag, because it goes to uninterruptible endless
0f113f3e MC	273	* loop on UltraSPARC II running Solaris. Things might be
	274	* different on Linux...
	275	*/
	276	if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&
	277	sigsetjmp(common_jmp, 1) == 0) {
	278	OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
	279	}
	280
	281	sigaction(SIGBUS, &bus_oact, NULL);
	282	sigaction(SIGILL, &ill_oact, NULL);
	283
	284	sigprocmask(SIG_SETMASK, &oset, NULL);
	285
	286	if (sizeof(size_t) == 8)
	287	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	288	# ifdef __linux
	289	else {
	290	int ret = syscall(340);
	291
	292	if (ret >= 0 && ret & 1)
	293	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	294	}
	295	# endif
	296	}