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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/bugs/sgiccbug.c
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Diffstat (limited to 'openssl/bugs/sgiccbug.c')
-rw-r--r--openssl/bugs/sgiccbug.c57
1 files changed, 57 insertions, 0 deletions
diff --git a/openssl/bugs/sgiccbug.c b/openssl/bugs/sgiccbug.c
new file mode 100644
index 000000000..178239d49
--- /dev/null
+++ b/openssl/bugs/sgiccbug.c
@@ -0,0 +1,57 @@
+/* NOCW */
+/* sgibug.c */
+/* bug found by Eric Young (eay@mincom.oz.au) May 95 */
+
+#include <stdio.h>
+
+/* This compiler bug it present on IRIX 5.3, 5.1 and 4.0.5 (these are
+ * the only versions of IRIX I have access to.
+ * defining FIXBUG removes the bug.
+ * (bug is still present in IRIX 6.3 according to
+ * Gage <agage@forgetmenot.Mines.EDU>
+ */
+
+/* Compare the output from
+ * cc sgiccbug.c; ./a.out
+ * and
+ * cc -O sgiccbug.c; ./a.out
+ */
+
+static unsigned long a[4]={0x01234567,0x89ABCDEF,0xFEDCBA98,0x76543210};
+static unsigned long b[4]={0x89ABCDEF,0xFEDCBA98,0x76543210,0x01234567};
+static unsigned long c[4]={0x77777778,0x8ACF1357,0x88888888,0x7530ECA9};
+
+main()
+ {
+ unsigned long r[4];
+ sub(r,a,b);
+ fprintf(stderr,"input a= %08X %08X %08X %08X\n",a[3],a[2],a[1],a[0]);
+ fprintf(stderr,"input b= %08X %08X %08X %08X\n",b[3],b[2],b[1],b[0]);
+ fprintf(stderr,"output = %08X %08X %08X %08X\n",r[3],r[2],r[1],r[0]);
+ fprintf(stderr,"correct= %08X %08X %08X %08X\n",c[3],c[2],c[1],c[0]);
+ }
+
+int sub(r,a,b)
+unsigned long *r,*a,*b;
+ {
+ register unsigned long t1,t2,*ap,*bp,*rp;
+ int i,carry;
+#ifdef FIXBUG
+ unsigned long dummy;
+#endif
+
+ ap=a;
+ bp=b;
+ rp=r;
+ carry=0;
+ for (i=0; i<4; i++)
+ {
+ t1= *(ap++);
+ t2= *(bp++);
+ t1=(t1-t2);
+#ifdef FIXBUG
+ dummy=t1;
+#endif
+ *(rp++)=t1&0xffffffff;
+ }
+ }