removing (outdated) drawterm

drawterm is much better maintained by russ cox,
so removing this outdated copy.

for a more recent version, go to:

http://swtch.com/drawterm/

1 files changed, 0 insertions, 42 deletions

diff --git a/sys/src/cmd/unix/drawterm/posix-power/tas.c b/sys/src/cmd/unix/drawterm/posix-power/tas.c
deleted file mode 100644
index 508aa6d81..000000000
--- a/sys/src/cmd/unix/drawterm/posix-power/tas.c
+++ /dev/null
@@ -1,42 +0,0 @@
-#include "u.h"
-#include "libc.h"
-
-/*
- * first argument (l) is in r3 at entry.
- * r3 contains return value upon return.
- */
-int
-tas(long *x)
-{
-	int     v;
-	/*
-	 * this __asm__ works with gcc 2.95.2 (mac os x 10.1).
-	 * this assembly language destroys r0 (0), some other register (v),
-	 * r4 (x) and r5 (temp).
-	 */
-	__asm__("\n	sync\n"
-	"	li	r0,0\n"
-	"	mr	r4,%1		/* &l->val */\n"
-	"	lis	r5,0xdead	/* assemble constant 0xdeaddead */\n"
-	"	ori	r5,r5,0xdead	/* \" */\n"
-	"tas1:\n"
-	"	dcbf	r4,r0	/* cache flush; \"fix for 603x bug\" */\n"
-	"	lwarx	%0,r4,r0	/* v = l->val with reservation */\n"
-	"	cmp	cr0,0,%0,r0	/* v == 0 */\n"
-	"	bne	tas0\n"
-	"	stwcx.	r5,r4,r0   /* if (l->val same) l->val = 0xdeaddead */\n"
-	"	bne	tas1\n"
-	"tas0:\n"
-	"	sync\n"
-	"	isync\n"
-	: "=r" (v)
-	: "r"  (x)
-	: "cc", "memory", "r0", "r4", "r5"
-	);
-	switch(v) {
-	case 0:		return 0;
-	case 0xdeaddead: return 1;
-	default:	print("tas: corrupted 0x%lux\n", v);
-	}
-	return 0;
-}