1 files changed, 158 insertions, 0 deletions
diff --git a/src/amd_common.c b/src/amd_common.c
new file mode 100644
index 0000000..f7e0d73
--- /dev/null
+++ b/src/amd_common.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2007 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Neither the name of the Advanced Micro Devices, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ */
+
+/* We want to share as much code between GX and LX as we possibly can for obvious reasons */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "xf86.h"
+
+#define move0(d,s,n) \
+  __asm__ __volatile__( \
+  "   rep; movsl\n" \
+  : "=&c" (d0), "=&S" (d1), "=&D" (d2) \
+  : "0" (n), "1" (s), "2" (d) \
+  : "memory")
+
+
+
+#define move1(d,s,n) \
+  __asm__ __volatile__( \
+  "   rep; movsl\n" \
+  "   movsb\n" \
+  : "=&c" (d0), "=&S" (d1), "=&D" (d2) \
+  : "0" (n), "1" (s), "2" (d) \
+  : "memory")
+
+#define move2(d,s,n) \
+  __asm__ __volatile__( \
+  "   rep; movsl\n" \
+  "   movsw\n" \
+  : "=&c" (d0), "=&S" (d1), "=&D" (d2) \
+  : "0" (n), "1" (s), "2" (d) \
+  : "memory")
+
+#define move3(d,s,n) \
+  __asm__ __volatile__( \
+  "   rep; movsl\n" \
+  "   movsw\n" \
+  "   movsb\n" \
+  : "=&c" (d0), "=&S" (d1), "=&D" (d2) \
+  : "0" (n), "1" (s), "2" (d) \
+  : "memory")
+
+
+void
+geode_memory_to_screen_blt(unsigned long src, unsigned long dst,
+    unsigned long sp, unsigned long dp, long w, long h, int bpp)
+{
+    int d0, d1, d2;
+    int n = w * (bpp >> 3);
+    int m = n >> 2;
+
+    switch (n & 3) {
+    case 0:
+        while (--h >= 0) {
+            move0(dst, src, m);
+            src += sp;
+            dst += dp;
+        }
+        break;
+    case 1:
+        while (--h >= 0) {
+            move1(dst, src, m);
+            src += sp;
+            dst += dp;
+        }
+        break;
+    case 2:
+        while (--h >= 0) {
+            move2(dst, src, m);
+            src += sp;
+            dst += dp;
+        }
+        break;
+    case 3:
+        while (--h >= 0) {
+            move3(dst, src, m);
+            src += sp;
+            dst += dp;
+        }
+        break;
+    }
+}
+
+/* I borrowed this function from the i830 driver - its much better
+   then what we had before
+*/
+
+int
+GeodeGetRefreshRate(DisplayModePtr pMode)
+{
+    if (pMode->VRefresh)
+	return (int)(pMode->VRefresh + 0.5);
+
+    return (int)(pMode->Clock * 1000.0 / pMode->HTotal / pMode->VTotal + 0.5);
+}
+
+/* This is used by both GX and LX.  It could be accelerated for LX, probably, but
+   that would involve a two pass blt, the first to copy the data, and the second
+   to copy the grey (using a pattern).  That seems like a bit of work for a 
+   very underused format - so we'll just use the slow version.
+*/
+
+void
+GeodeCopyGreyscale(unsigned char *src, unsigned char *dst,
+		   int dstPitch, int srcPitch, int h, int w) 
+{
+  int i;
+  unsigned char *src2 = src;
+  unsigned char *dst2 = dst;
+  unsigned char *dst3;
+  unsigned char *src3;
+  
+  dstPitch <<= 1;
+  
+  while (h--) {
+    dst3 = dst2;
+    src3 = src2;
+    for (i = 0; i < w; i++) {
+      *dst3++ = *src3++;         /* Copy Y data */
+      *dst3++ = 0x80;            /* Fill UV with 0x80 - greyscale */
+    }
+    
+    src3 = src2;
+    for (i = 0; i < w; i++) {
+      *dst3++ = *src3++;         /* Copy Y data */
+      *dst3++ = 0x80;            /* Fill UV with 0x80 - greyscale */
+    }
+    
+    dst2 += dstPitch;
+    src2 += srcPitch;
+  }
+}