preproc: %while ... %endwhile looploops

First user of the new loop infrastructure: a %while[n][cond] loop;
supports anything that the %if/%elif directives support, too.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/test/while.asm b/test/while.asm
new file mode 100644
index 00000000..9b835066
--- /dev/null
+++ b/test/while.asm
@@ -0,0 +1,5 @@
+%assign i 1
+%while i
+	dq i
+	%assign i i << 1
+%endwhile