new version from Chris Torek

[unix-history] / usr / src / old / pcc / mip / pass2.h

diff --git a/usr/src/old/pcc/mip/pass2.h b/usr/src/old/pcc/mip/pass2.h
index d7d2c32..1c0c526 100644 (file)
--- a/usr/src/old/pcc/mip/pass2.h
+++ b/usr/src/old/pcc/mip/pass2.h
@@ -1,4 +1,4 @@
-/*     pass2.h 4.3     87/12/10        */
+/*     pass2.h 4.4     87/12/10        */

 
 #ifndef _PASS2_
 #define        _PASS2_
 
 #ifndef _PASS2_
 #define        _PASS2_


@@ -129,6 +129,8 @@ extern      struct respref {
 #define istnode(p)     (p->in.op==REG && istreg(p->tn.rval))
 
 #define TBUSY          01000   /* register temporarily busy (during alloc) */
 #define istnode(p)     (p->in.op==REG && istreg(p->tn.rval))
 
 #define TBUSY          01000   /* register temporarily busy (during alloc) */

+#define PBUSY          02000   /* this reg and next one are used as a pair */
+#define ISBUSY(r)      (((busy[r])&(PBUSY-1)) > 1)

 #define REGLOOP(i)     for (i = 0; i < REGSZ; ++i)
 
 extern NODE *deltrees[DELAYS]; /* trees held for delayed evaluation */
 #define REGLOOP(i)     for (i = 0; i < REGSZ; ++i)
 
 extern NODE *deltrees[DELAYS]; /* trees held for delayed evaluation */