From 0b5ba93a2215268e0a4f08f763575fa0059890b0 Mon Sep 17 00:00:00 2001
From: blondie7575 <qd@quinndunki.com>
Date: Mon, 7 Aug 2017 21:41:52 -0700
Subject: [PATCH] Optimization

---
 gscats.2mg | Bin 819264 -> 819264 bytes
 terrain.s  |  26 +++++++++++++-------------
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/gscats.2mg b/gscats.2mg
index 07a7f572e5412389dcceac5dff9bdc7b5513df3f..1ee5c50ca1adb7273fc7d90b13a297d747eb98d9 100644
GIT binary patch
delta 862
zcmZwF%Ps?96bJCm^fo@1)}?5rNKxvpZbfLv3bEh`DovzIeE^9D!z43Z=xlUnL!v8*
zh1kd>V&@6Eu@V~#^#Yvfe+I=QC%^wW-<fGMt)7kQ+33}dvo7MZ+3szEyC>q~HIaX~
zPPk(GD=C)SVz-AZ_UwP-y=?X4BOv)@Is5t`Tm|n=*-@GmcOTh$ime%E+kzy>GVN!d
zDu?F+D_(N+3{98c_mb=)T`H}EFTcZ&^fOlF>gHGXyRGiyCAzFnH!`ljlYf?s8?{ZP
znXk|Se4rJyfp*{r0nh=0Tv975L8B=vouCVJgAi?SCn2NZPI^Eu=mTNU4+cO441ysr
z3`W2x7z5*A0z|<im;%#a2F!vOm;>`*0W8vY7xRloBj%St93;SUWka+ZFH_8mj>=o5
z;G|yyBP}C2uq#q@TG6YxaVrho*6>WNF^6v|vyOAMX4+8e%yg#In@Lw1%#_G^%#@Kl
z)&q65(Hg2vR+5_R^bfff`2=?mE*yso92HMxr*cp^sa#ZUDuJqoirs_@wSkvU?YU%2

delta 862
zcmZwF$u9$O6bJCmbQ?cQEw!{#OH1ubYb%0|6XL*u^dFEO`2!>x43o_CpmWii3kfHQ
zgSf~f;>2Iji<7wGAE-C;ok7baFQ4yweY0eydM2)C;@8{ms+iy5cyI{bNX*Y`BL8@k
z^d$C|QY^d4?haYvH82`^?|c-ld+tx!QJP)tKC{&nTUjm^gIj_m$TDqZUW`@>$a3b%
zTss%o)g?#Q&~*88Z-ZT=3x!qi?N9iXe#eqr+LU$WZE3$ypu@hqk#YQ;{Ig`7sI4mv
zyonz)f+o-mT0j5<K`RJx8`_5wGMW#i4YY#}5T*_8By2R?Nd$C(ZV&}MpcnLkelP$A
z!4Mb*BVZK7Kpc#LaWDZU!4yb<X)pt3!5lrin42>iF*gquKoTsP8=}*AnPN_KnQxVX
zo4y1_+K%MHu1L{s$6CdUQ)%e6hi7VqHGEf@{d2a`N^5GBmClrEE9pv&m6BPXm3Abb
zeL-EVvxjQEouqmv{X=d<KFJ+K^T*LVN5xY)sa#ZUDi4*HN}#HsVz<$JW$^6_fiPiG

diff --git a/terrain.s b/terrain.s
index 5d6d01d..0298794 100644
--- a/terrain.s
+++ b/terrain.s
@@ -63,14 +63,24 @@ renderClippedSpanChain:
 	sta renderSpanComplete+1		; 4
 
 	; Find right edge of screen within span chains
-	; = 27 cycles per skipped span
+	; = 26 cycles per skipped span
 renderClippedSpanChainLoop:
 
 	lda spanChain,y		; 4
 	sec					; 2
 	sbc <RIGHTEDGE		; 3
-	bmi renderClippedSpanChainNextSpan	; 2/3
-	beq renderClippedSpanChainNextSpan	; 2/3
+	beq renderClippedSpanChainNextSpan		; 2
+	bpl renderClippedSpanChainLoop2			; 2
+
+renderClippedSpanChainNextSpan:
+	; Track remaining distance from right edge and
+	; continue searching for visible right edge
+	eor #$ffff			; 2
+	inc					; 2
+	sta <RIGHTEDGE		; 3
+	dey					; 2
+	dey					; 2
+	bra renderClippedSpanChainLoop	; 3
 
 renderClippedSpanChainLoop2:
 	; Now render spans until left edge of screen
@@ -107,16 +117,6 @@ renderClippedSpanChainRenderNext:
 	lda spanChain,y		; 5
 	bra renderClippedSpanChainLoop2	; 3
 
-renderClippedSpanChainNextSpan:
-	; Track remaining distance from right edge and
-	; continue searching for visible right edge
-	eor #$ffff			; 2
-	inc					; 2
-	sta <RIGHTEDGE		; 3
-	dey					; 2
-	dey					; 2
-	bra renderClippedSpanChainLoop	; 3
-
 renderClippedSpanChainLastSpan:
 	; Render visible portion of last visible span
 	; = 26 cycles per row