From 70dfc6bb1d9020a71243d98cca682240ef7c6521 Mon Sep 17 00:00:00 2001
From: Wim Taymans <wim.taymans@gmail.com>
Date: Fri, 26 Jan 2001 22:10:12 +0000
Subject: [PATCH] Converted the scaler to all asm

Original commit message from CVS:
Converted the scaler to all asm
---
 libs/videoscale/Makefile.am        |  4 +--
 libs/videoscale/gstscale_x86.c     | 38 ---------------------------
 libs/videoscale/gstscale_x86_asm.s | 53 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+), 40 deletions(-)
 create mode 100644 libs/videoscale/gstscale_x86_asm.s

diff --git a/libs/videoscale/Makefile.am b/libs/videoscale/Makefile.am
index 780f465..1a00752 100644
--- a/libs/videoscale/Makefile.am
+++ b/libs/videoscale/Makefile.am
@@ -3,7 +3,7 @@ filterdir = $(libdir)/gst
 filter_LTLIBRARIES = libgstvideoscale.la
 
 if HAVE_CPU_I386
-SCALER = gstscale_x86.c
+SCALER = gstscale_x86.c gstscale_x86_asm.s
 else
 SCALER =
 endif
@@ -16,4 +16,4 @@ libgstvideoscaleinclude_HEADERS = gstvideoscale.h
 noinst_HEADERS = gstscale_x86.h
 
 #CFLAGS += -S -O1 $(FOMIT_FRAME_POINTER) -funroll-all-loops -finline-functions -ffast-math
-CFLAGS = -g $(GLIB_CFLAGS) $(GST_CFLAGS) $(XML_CFLAGS) -O5 -fomit-frame-pointer -ffast-math
+CFLAGS = $(GLIB_CFLAGS) $(GST_CFLAGS) $(XML_CFLAGS) -O5 -fomit-frame-pointer -ffast-math
diff --git a/libs/videoscale/gstscale_x86.c b/libs/videoscale/gstscale_x86.c
index 026dec3..22ecf31 100644
--- a/libs/videoscale/gstscale_x86.c
+++ b/libs/videoscale/gstscale_x86.c
@@ -78,41 +78,3 @@ gst_videoscale_generate_rowbytes_x86 (unsigned char *copy_row, int src_w, int ds
   GST_DEBUG (0,"scaler start/end %p %p %p\n", copy_row, eip, (void*)(eip-copy_row));
 }
 
-void
-gst_videoscale_scale_nearest_x86 (GstVideoScale *scale,
-		                  unsigned char *src,
-		                  unsigned char *dest,
-			          int sw, int sh, int dw, int dh)
-{
-  int pos, inc, y;
-  int u1, u2;
-
-
-  scale->temp = scale->copy_row;
-
-  GST_DEBUG (0,"videoscale: scaling nearest %p %p %p %d\n", scale->copy_row, src, dest, dw);
-
-  pos = 0x10000;
-  inc = (sh<<16)/dh;
-
-  for (y = dh; y > 0; y--) {
-
-    while (pos >0x10000) {
-      src += sw;
-      pos-=0x10000;
-    }
-
-    __asm__ __volatile__ ("
-	   movl %2, %%eax\n
-           call *%%eax
-           "
-           : "=&D" (u1), "=&S" (u2)
-           : "g" (scale->temp), "0" (dest), "1" (src)
-           : "memory" );
-
-    dest+= dw;
-
-    pos += inc;
-  }
-  GST_DEBUG(0,"videoscale: scaling nearest done %p\n", scale->copy_row);
-}
diff --git a/libs/videoscale/gstscale_x86_asm.s b/libs/videoscale/gstscale_x86_asm.s
new file mode 100644
index 0000000..9ec9785
--- /dev/null
+++ b/libs/videoscale/gstscale_x86_asm.s
@@ -0,0 +1,53 @@
+.text
+	.align 4
+.globl gst_videoscale_scale_nearest_x86
+	.type	 gst_videoscale_scale_nearest_x86,@function
+gst_videoscale_scale_nearest_x86:
+
+	subl $8,%esp
+	pushl %ebp
+	pushl %edi
+	pushl %esi
+	movl 28(%esp),%ebp
+	movl 24(%esp),%edx
+	addl $28,%edx
+	movl 24(%esp),%eax
+	movl %edx,8220(%eax)
+	movl $65536,12(%esp)
+	movl 40(%esp),%ecx
+	sall $16,%ecx
+	movl %ecx,%eax
+	cltd
+	idivl 48(%esp)
+	movl %eax,%ecx
+	movl 48(%esp),%eax
+	movl %eax,16(%esp)
+	testl %eax,%eax
+	jle .L92
+	jmp .L100
+	.p2align 4,,7
+.L97:
+	addl 36(%esp),%ebp
+	addl $-65536,12(%esp)
+.L100:
+	cmpl $65536,12(%esp)
+	jg .L97
+	movl 32(%esp),%edi
+	movl %ebp,%esi
+	movl 24(%esp),%edx
+	
+        movl 8220(%edx), %eax
+        call *%eax
+           
+	movl 44(%esp),%eax
+	addl %eax,32(%esp)
+	addl %ecx,12(%esp)
+	decl 16(%esp)
+	cmpl $0,16(%esp)
+	jg .L100
+.L92:
+	popl %esi
+	popl %edi
+	popl %ebp
+	addl $8,%esp
+	ret
-- 
2.7.4