PERFORCE change 76945 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=76945

Change 76945 by marcel at marcel_nfs on 2005/05/13 21:45:57

	o  Cache vc->vtc_con_width in local variable width. This improves
	   readability and makes sure the compiler knows the value is not
	   changed across function calls. The latter helps optimizations.
	o  s/BITBLT_CLRTOFB/BITBLT_CTOFB/
	o  Fix clearing the last line (missing width product).

Affected files ...

.. //depot/projects/tty/sys/dev/vtc/vtc_con.c#5 edit

Differences ...

==== //depot/projects/tty/sys/dev/vtc/vtc_con.c#5 (text+ko) ====

@@ -95,6 +95,7 @@
 				    0x10, 0x28, 0x28, 0x44, 0x44, 0x82, 0x82,
 				    0x00, 0x00, 0x00, 0x00, 0x00 };
 	struct vtc_conout *vc = cp->cn_arg;
+	int width = vc->vtc_con_width;
 
 	switch (c) {
 	case 0x0a:
@@ -103,7 +104,7 @@
 		break;
 	default:
 		vc->vtc_con_bitblt(vc, BITBLT_H1TOFB, (uintptr_t)bitmap,
-		    vc->vtc_con_width * row * 19 + col * 8, 8, 19, 0, 7);
+		    width * row * 19 + col * 8, 8, 19, 0, 7);
 		col++;
 		break;
 	}
@@ -112,10 +113,10 @@
 		row++;
 	}
 	if (row >= 24) {
-		vc->vtc_con_bitblt(vc, BITBLT_FBTOFB, vc->vtc_con_width * 19,
-		    0, vc->vtc_con_width, 23 * 19);
-		vc->vtc_con_bitblt(vc, BITBLT_CLRTOFB, 0, 23 * 19,
-		    vc->vtc_con_width, 19);
+		vc->vtc_con_bitblt(vc, BITBLT_FBTOFB, width * 19, 0, width,
+		    23 * 19);
+		vc->vtc_con_bitblt(vc, BITBLT_CTOFB, 0, width * 23 * 19, width,
+		    19);
 		row = 23;
 	}
 }