Attachment 22204 Details for Bug 19722 – use the BWX instructions for 8 and 16 bit access on Dense mapping

[patch] use the BWX instructions for 8 and 16 bit access on Dense mapping

xorg.alpha_fixes.diff3 (text/plain), 2.39 KB, created by Manuel Bouyer on 2009-01-24 09:10:19 UTC

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Creator: Manuel Bouyer

Created: 2009-01-24 09:10:19 UTC

Size: 2.39 KB

patch

obsolete

>Index: external/mit/xorg-server/dist/hw/xfree86/os-support/bsd/bsd_ev56.c
>===================================================================
>RCS file: /cvsroot/xsrc/external/mit/xorg-server/dist/hw/xfree86/os-support/bsd/bsd_ev56.c,v
>retrieving revision 1.1.1.1
>diff -u -p -u -r1.1.1.1 bsd_ev56.c
>--- external/mit/xorg-server/dist/hw/xfree86/os-support/bsd/bsd_ev56.c	31 Jul 2008 19:49:37 -0000	1.1.1.1
>+++ external/mit/xorg-server/dist/hw/xfree86/os-support/bsd/bsd_ev56.c	15 Jan 2009 19:13:13 -0000
>@@ -13,6 +13,15 @@
> #include "xf86_OSlib.h"
> #include "xf86OSpriv.h"
> 
>+#include <machine/bwx.h>
>+
>+/*
>+ * The following functions are used only on EV56 and greater CPUs,
>+ * and the assembler requires going to EV56 mode in order to emit
>+ * these instructions.
>+ */
>+__asm(".arch ev56");
>+
> int readDense8(pointer Base, register unsigned long Offset);
> int readDense16(pointer Base, register unsigned long Offset);
> int readDense32(pointer Base, register unsigned long Offset);
>@@ -33,14 +42,14 @@ int
> readDense8(pointer Base, register unsigned long Offset)
> {
>     mem_barrier();
>-    return *(volatile CARD8*) ((unsigned long)Base+(Offset));
>+    return (alpha_ldbu((pointer)((unsigned long)Base+(Offset))));
> }
> 
> int
> readDense16(pointer Base, register unsigned long Offset)
> {
>     mem_barrier();
>-    return *(volatile CARD16*) ((unsigned long)Base+(Offset));
>+    return (alpha_ldwu((pointer)((unsigned long)Base+(Offset))));
> }
> 
> int
>@@ -53,13 +62,13 @@ readDense32(pointer Base, register unsig
> void
> writeDenseNB8(int Value, pointer Base, register unsigned long Offset)
> {
>-    *(volatile CARD8*)((unsigned long)Base+(Offset)) = Value;
>+    alpha_stb((pointer)((unsigned long)Base+(Offset)), Value);
> }
> 
> void
> writeDenseNB16(int Value, pointer Base, register unsigned long Offset)
> {
>-    *(volatile CARD16*)((unsigned long)Base + (Offset)) = Value;
>+    alpha_stw((pointer)((unsigned long)Base + (Offset)), Value);
> }
> 
> void
>@@ -72,14 +81,14 @@ void
> writeDense8(int Value, pointer Base, register unsigned long Offset)
> {
>     write_mem_barrier();
>-    *(volatile CARD8 *)((unsigned long)Base+(Offset)) = Value;
>+    alpha_stb((pointer)((unsigned long)Base+(Offset)), Value);
> }
> 
> void
> writeDense16(int Value, pointer Base, register unsigned long Offset)
> {
>     write_mem_barrier();
>-    *(volatile CARD16 *)((unsigned long)Base+(Offset)) = Value;
>+    alpha_stw((pointer)((unsigned long)Base + (Offset)), Value);
> }
> 
> void

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