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1 files changed, 115 insertions, 0 deletions

diff --git a/src/lib/libcrypto/ppccap.c b/src/lib/libcrypto/ppccap.c
new file mode 100644
index 0000000000..ab89ccaa12
--- /dev/null
+++ b/src/lib/libcrypto/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);
+        }