File 0003-qemu-cvs-alsa_bitfield.patch of Package qemu

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File 0003-qemu-cvs-alsa_bitfield.patch of Package qemu

From 8a88b86cc9a3ad0bb6da52fb0f938fe5a085c027 Mon Sep 17 00:00:00 2001
From: Ulrich Hecht <uli@suse.de>
Date: Tue, 14 Apr 2009 16:20:50 +0200
Subject: [PATCH 03/17] qemu-cvs-alsa_bitfield

Implements TYPE_INTBITFIELD partially. (required for ALSA support)

Signed-off-by: Ulrich Hecht <uli@suse.de>
---
 thunk.c |   21 +++++++++++++++++++++
 thunk.h |    3 +++
 2 files changed, 24 insertions(+), 0 deletions(-)

diff --git a/thunk.c b/thunk.c
index 0657188..5638b2c 100644
--- a/thunk.c
+++ b/thunk.c
@@ -41,6 +41,7 @@ static inline const argtype *thunk_type_next(const argtype *type_ptr)
     case TYPE_CHAR:
     case TYPE_SHORT:
     case TYPE_INT:
+    case TYPE_INTBITFIELD:
     case TYPE_LONGLONG:
     case TYPE_ULONGLONG:
     case TYPE_LONG:
@@ -139,6 +140,26 @@ const argtype *thunk_convert(void *dst, const void *src,
     case TYPE_INT:
         *(uint32_t *)dst = tswap32(*(uint32_t *)src);
         break;
+    case TYPE_INTBITFIELD:
+#if defined(TARGET_I386) && defined(__powerpc__)
+        /* powerpc uses the MSB, whereas i386 uses the LSB 
+         * to store the first bit in a field */
+        {
+	    unsigned char byte = *(uint8_t *)src;
+            *(uint8_t *)dst  = ((byte >> 7) & 1)
+		             | ((byte >> 5) & 2)
+			     | ((byte >> 3) & 4)
+			     | ((byte >> 1) & 8)
+			     | ((byte << 1) & 16)
+			     | ((byte << 3) & 32)
+			     | ((byte << 5) & 64)
+			     | ((byte << 7) & 128);
+	    /* FIXME: implement for bitfields > 1 byte and other archs */
+        }
+#else
+        *(uint32_t *)dst = tswap32(*(uint32_t *)src);
+#endif
+	break;
     case TYPE_LONGLONG:
     case TYPE_ULONGLONG:
         *(uint64_t *)dst = tswap64(*(uint64_t *)src);
diff --git a/thunk.h b/thunk.h
index 109c541..55890f3 100644
--- a/thunk.h
+++ b/thunk.h
@@ -37,6 +37,7 @@ typedef enum argtype {
     TYPE_PTR,
     TYPE_ARRAY,
     TYPE_STRUCT,
+    TYPE_INTBITFIELD,
 } argtype;
 
 #define MK_PTR(type) TYPE_PTR, type
@@ -90,6 +91,7 @@ static inline int thunk_type_size(const argtype *type_ptr, int is_host)
     case TYPE_SHORT:
         return 2;
     case TYPE_INT:
+    case TYPE_INTBITFIELD:
         return 4;
     case TYPE_LONGLONG:
     case TYPE_ULONGLONG:
@@ -127,6 +129,7 @@ static inline int thunk_type_align(const argtype *type_ptr, int is_host)
     case TYPE_SHORT:
         return 2;
     case TYPE_INT:
+    case TYPE_INTBITFIELD:
         return 4;
     case TYPE_LONGLONG:
     case TYPE_ULONGLONG:
-- 
1.7.1

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