From cdf6024452fe7d74cb6d5bae4dbbedb48e7af886 Mon Sep 17 00:00:00 2001
From: Nick Briggs <nicholas.h.briggs@gmail.com>
Date: Sat, 14 Jan 2023 16:03:21 -0800
Subject: [PATCH] Add compile-time constants for SMALLP values 0 and -1

---
 inc/arith.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/inc/arith.h b/inc/arith.h
index 5e858ca..c2afb2d 100644
--- a/inc/arith.h
+++ b/inc/arith.h
@@ -22,6 +22,8 @@
 #define MAX_FIXP 2147483647  /* == 0x7FFFFFFF  */
 #define MIN_FIXP (-2147483648) /* == 0x80000000  */
 
+#define SMALLP_ZERO ((LispPTR)S_POSITIVE)
+#define SMALLP_MINUSONE ((LispPTR)(S_NEGATIVE | 0xFFFF))
 /**
  * extract an integer value from a smallp
  */