From 8a88b86cc9a3ad0bb6da52fb0f938fe5a085c027 Mon Sep 17 00:00:00 2001 From: Ulrich Hecht 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 --- 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