From: Hiten Pandya <hmp@dragonflybsd.org>
Date: Wed, 3 Aug 2005 13:37:27 +0000 (+0000)
Subject: Add test for comparing following types of conditionals:
X-Git-Tag: v2.0.1~6382
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/a99bca8e35d2d1f023b91e85c040c032f5876917

Add test for comparing following types of conditionals:

 - comparing a function pointer to NULL from a struct pointer
 - comparing a function pointer to NULL from a struct
 - bit-testing
---

diff --git a/test/sysperf/Makefile b/test/sysperf/Makefile
index 38b89b532e..b65b9702ba 100644
--- a/test/sysperf/Makefile
+++ b/test/sysperf/Makefile
@@ -1,10 +1,10 @@
 #
-# $DragonFly: src/test/sysperf/Makefile,v 1.12 2005/08/03 13:29:45 hmp Exp $
+# $DragonFly: src/test/sysperf/Makefile,v 1.13 2005/08/03 13:37:27 hmp Exp $
 #
 
 TARGETS=/tmp/sc1 /tmp/sc2 /tmp/sc3 /tmp/sc4 /tmp/sc5 \
 	/tmp/loop1 /tmp/loop2 /tmp/loop3 \
-	/tmp/call1 /tmp/call2 /tmp/call3 \
+	/tmp/call1 /tmp/call2 /tmp/call3 /tmp/cmp \
 	/tmp/mt2 \
 	/tmp/fork1 /tmp/pipe1 /tmp/pipe2 \
 	/tmp/sw1 /tmp/sw2 /tmp/sw3 \
@@ -64,6 +64,9 @@ all:	$(TARGETS)
 /tmp/call3: call3.c blib.c
 	$(CC) $(CFLAGS) call3.c blib.c -o /tmp/call3
 
+/tmp/cmp: cmp.c blib.c
+	    $(CC) $(CFLAGS) cmp.c blib.c -o /tmp/cmp
+
 /tmp/mbw1: mbwtest.c
 	$(CC) -O mbwtest.c -o /tmp/mbw1
 
diff --git a/test/sysperf/cmp.c b/test/sysperf/cmp.c
new file mode 100644
index 0000000000..21df2f7889
--- /dev/null
+++ b/test/sysperf/cmp.c
@@ -0,0 +1,55 @@
+/*
+ * cmp.c
+ *
+ * Test for comparing pointers vs bit-testing.
+ *
+ * $DragonFly: src/test/sysperf/cmp.c,v 1.1 2005/08/03 13:37:27 hmp Exp $
+ */
+
+#include "blib.h"
+
+#define LOOP 1000000000
+
+static void nop(void) { }
+
+struct f {
+	void (*nop_ptr)(void);
+	int mask;
+} foo;
+#define	SOME_MASK 	0x00800
+
+struct f *fp = &foo;
+
+int
+main(int ac, char **av)
+{
+    int i;
+	struct f *fp = &foo;
+	foo.nop_ptr = nop;
+	foo.mask = SOME_MASK;
+
+    printf("compare nop() function pointer against NULL (struct not pointer)\n");
+    start_timing();
+    for (i = 0; i < LOOP; ++i)
+		if (foo.nop_ptr == NULL)
+			;
+    stop_timing(LOOP, "loop1/cmp-pointer");
+
+	printf("compare nop() function pointer against NULL (struct pointer)\n");
+    start_timing();
+    for (i = 0; i < LOOP; ++i)
+		if (fp->nop_ptr == NULL)
+			;
+    stop_timing(LOOP, "loop2/cmp-pointer");
+
+	printf("compare bitmask checking\n");
+    start_timing();
+    for (i = 0; i < LOOP; ++i)
+		if (foo.mask & SOME_MASK)
+			;
+    stop_timing(LOOP, "loop3/cmp-bitmask");
+
+
+    return(0);
+}
+