1 files changed, 115 insertions, 0 deletions
diff --git a/crypto/ppccap.c b/crypto/ppccap.c
new file mode 100644
index 0000000..ab89cca
--- /dev/null
+++ b/crypto/ppccap.c
@@ -0,0 +1,115 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+#include <signal.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_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;
+
+	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);
+	}