From 3130b51a9624ac6cb7468f28c788747a30c427be Mon Sep 17 00:00:00 2001
From: terminx <terminx@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Tue, 25 Jun 2019 11:30:03 +0000
Subject: [PATCH] Add SLOPTABLESIZ preprocessor definition

git-svn-id: https://svn.eduke32.com/eduke32@7718 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/build/include/a.h    |  5 +++++
 source/build/src/a-c.cpp    |  4 +---
 source/build/src/engine.cpp | 10 +++++-----
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/source/build/include/a.h b/source/build/include/a.h
index 7c498fa91..7633db6a7 100644
--- a/source/build/include/a.h
+++ b/source/build/include/a.h
@@ -16,6 +16,11 @@
 # define CLASSIC_NONPOW2_YSIZE_WALLS
 #endif
 
+#define SLOPTABLESIZ 32768
+#define HALFSLOPTABLESIZ (SLOPTABLESIZ>>1)
+
+extern int32_t sloptable[SLOPTABLESIZ];
+
 /** Definitions of high-precision integer types. **/
 // Should be used for values that represent coordinates with which calculations
 // like dot product are carried out. Substituting 32-bit ints for these will
diff --git a/source/build/src/a-c.cpp b/source/build/src/a-c.cpp
index f7cbad509..7d6bc0018 100644
--- a/source/build/src/a-c.cpp
+++ b/source/build/src/a-c.cpp
@@ -107,8 +107,6 @@ void hlineasm4(bssize_t cnt, int32_t skiploadincs, int32_t paloffs, uint32_t by,
 
 
 ///// Sloped ceiling/floor vertical line functions /////
-extern int32_t sloptable[32768];
-
 void slopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, bssize_t cnt, int32_t bx, int32_t by)
 {
     intptr_t * A_C_RESTRICT slopalptr;
@@ -119,7 +117,7 @@ void slopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, bssize_t cnt, int32_t
     slopalptr = (intptr_t *)slopaloffs;
     for (; cnt>0; cnt--)
     {
-        i = (sloptable[(bz>>6)+16384]); bz += bzinc;
+        i = (sloptable[(bz>>6)+HALFSLOPTABLESIZ]); bz += bzinc;
         u = bx+(inthi_t)globalx3*i;
         v = by+(inthi_t)globaly3*i;
         (*(char *)p) = *(char *)(((intptr_t)slopalptr[0])+gbuf[((u>>(32-glogx))<<glogy)+(v>>(32-glogy))]);
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index cdc3f5a2e..31d7f0870 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -164,7 +164,7 @@ int32_t globalx1, globaly2, globalx3, globaly3;
 }
 #endif
 
-int32_t sloptable[32768];
+int32_t sloptable[SLOPTABLESIZ];
 static intptr_t slopalookup[16384];    // was 2048
 
 static int32_t no_radarang2 = 0;
@@ -3393,7 +3393,7 @@ static void tslopevlin(uint8_t *p, const intptr_t *slopalptr, bssize_t cnt, int3
 
     do
     {
-        int const i = (sloptable[(bz>>6)+16384]); bz += bzinc;
+        int const i = (sloptable[(bz>>6)+HALFSLOPTABLESIZ]); bz += bzinc;
         uint32_t u = bx + xtou*i;
         uint32_t v = by + ytov*i;
         uint8_t ch = buf[((u>>(32-logx))<<logy)+(v>>(32-logy))];
@@ -3423,7 +3423,7 @@ static void mslopevlin(uint8_t *p, const intptr_t *slopalptr, bssize_t cnt, int3
 
     do
     {
-        int const i = (sloptable[(bz>>6)+16384]); bz += bzinc;
+        int const i = (sloptable[(bz>>6)+HALFSLOPTABLESIZ]); bz += bzinc;
         uint32_t u = bx + xtou*i;
         uint32_t v = by + ytov*i;
         uint8_t ch = buf[((u>>(32-logx))<<logy)+(v>>(32-logy))];
@@ -7229,8 +7229,8 @@ static int32_t engineLoadTables(void)
         for (i=0; i<2048; i++)
             reciptable[i] = divscale30(2048, i+2048);
 
-        for (i=0; i<32768; i++)
-            sloptable[i] = krecipasm(i-16384);
+        for (i=0; i<SLOPTABLESIZ; i++)
+            sloptable[i] = krecipasm(i-HALFSLOPTABLESIZ);
 
         for (i=0; i<=512; i++)
             sintable[i] = (int16_t)(16384.f * sinf((float)i * BANG2RAD));