From 0fa15b473f75aa0fd3ca39e4a06294a9d05e6ada Mon Sep 17 00:00:00 2001
From: theoddone33 <>
Date: Thu, 20 Sep 2001 01:51:11 +0000
Subject: [PATCH] Added some pipelining for faster drawing on pentiums, gives
 3-5 extra fps

---
 zsnes/src/linux/sw_draw.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/zsnes/src/linux/sw_draw.c b/zsnes/src/linux/sw_draw.c
index 7737e474..47c9aa07 100644
--- a/zsnes/src/linux/sw_draw.c
+++ b/zsnes/src/linux/sw_draw.c
@@ -123,9 +123,6 @@ void sw_clearwin()
     switch (BitDepth) {
 	case 16:
 	    __asm__ __volatile__ (
-	"	pushw %%es\n"					\
-	"	movw %%ds, %%ax\n"				\
-	"	movw %%ax, %%es\n"				\
 	"	xorl %%eax, %%eax\n"				\
 	"	movl SurfBufD, %%edi\n"				\
 	"	xorl %%ebx, %%ebx\n"				\
@@ -133,20 +130,17 @@ void sw_clearwin()
 	"	movl SurfaceX, %%ecx\n"				\
 	"	rep\n"						\
 	"	stosw\n"					\
+	"	movl SurfaceX, %%edx\n"				\
 	"	addl pitch, %%edi\n"				\
-	"	subl SurfaceX, %%edi\n"				\
-	"	subl SurfaceX, %%edi\n"				\
+	"	shll $1, %%edx\n"				\
 	"	addl $1, %%ebx\n"				\
+	"	subl %%edx, %%edi\n"				\
 	"	cmpl SurfaceY, %%ebx\n"				\
 	"	jne Blank2\n"					\
-	"	popw %%es\n"					\
-	: : : "cc", "memory", "eax", "ebx", "ecx", "edi");
+	: : : "cc", "memory", "eax", "ebx", "edx", "ecx", "edi");
 	    break;
 	case 32:
 	    __asm__ __volatile__ (
-	"	pushw %%es\n"					\
-	"	movw %%ds, %%ax\n"				\
-	"	movw %%ax, %%es\n"				\
 	"	xorl %%eax, %%eax\n"				\
 	"	movl SurfBufD, %%edi\n"				\
 	"	xorl %%ebx, %%ebx\n"				\
@@ -162,7 +156,6 @@ void sw_clearwin()
 	"	addl $1, %%ebx\n"				\
 	"	cmpl SurfaceY, %%ebx\n"				\
 	"	jne Blank3\n"					\
-	"	popw %%es\n"					\
 	: : : "cc", "memory", "eax", "ebx", "ecx","edi");
 	    break;
     }