From 3d69b95e5e2ef4c5acfa2b2aaa93e2fad9eeeaa1 Mon Sep 17 00:00:00 2001 From: "Emilio G. Cota" Date: Tue, 22 May 2018 18:26:49 -0400 Subject: trace: simplify trace_mem functions Add some defines for the mem_info bits, simplify trace_mem_build_info, and also simplify trace_mem_get_info by making it a wrapper around trace_mem_build_info. This paves the way for increasing size_shift by one bit. Signed-off-by: Emilio G. Cota Message-id: 1527028012-21888-3-git-send-email-cota@braap.org Signed-off-by: Stefan Hajnoczi --- trace/mem-internal.h | 40 ++++++++++++++++++---------------------- trace/mem.h | 2 +- 2 files changed, 19 insertions(+), 23 deletions(-) (limited to 'trace') diff --git a/trace/mem-internal.h b/trace/mem-internal.h index ddda934..b684e27 100644 --- a/trace/mem-internal.h +++ b/trace/mem-internal.h @@ -10,37 +10,33 @@ #ifndef TRACE__MEM_INTERNAL_H #define TRACE__MEM_INTERNAL_H -static inline uint8_t trace_mem_get_info(TCGMemOp op, bool store) +#define TRACE_MEM_SZ_SHIFT_MASK 0x3 /* size shift mask */ +#define TRACE_MEM_SE (1ULL << 2) /* sign extended (y/n) */ +#define TRACE_MEM_BE (1ULL << 3) /* big endian (y/n) */ +#define TRACE_MEM_ST (1ULL << 4) /* store (y/n) */ + +static inline uint8_t trace_mem_build_info( + int size_shift, bool sign_extend, TCGMemOp endianness, bool store) { - uint8_t res = op; - bool be = (op & MO_BSWAP) == MO_BE; + uint8_t res; - /* remove untraced fields */ - res &= (1ULL << 4) - 1; - /* make endianness absolute */ - res &= ~MO_BSWAP; - if (be) { - res |= 1ULL << 3; + res = size_shift & TRACE_MEM_SZ_SHIFT_MASK; + if (sign_extend) { + res |= TRACE_MEM_SE; + } + if (endianness == MO_BE) { + res |= TRACE_MEM_BE; } - /* add fields */ if (store) { - res |= 1ULL << 4; + res |= TRACE_MEM_ST; } - return res; } -static inline uint8_t trace_mem_build_info( - TCGMemOp size, bool sign_extend, TCGMemOp endianness, bool store) +static inline uint8_t trace_mem_get_info(TCGMemOp op, bool store) { - uint8_t res = 0; - res |= size; - res |= (sign_extend << 2); - if (endianness == MO_BE) { - res |= (1ULL << 3); - } - res |= (store << 4); - return res; + return trace_mem_build_info(op & MO_SIZE, !!(op & MO_SIGN), + op & MO_BSWAP, store); } #endif /* TRACE__MEM_INTERNAL_H */ diff --git a/trace/mem.h b/trace/mem.h index 9c88bcb..2b58196 100644 --- a/trace/mem.h +++ b/trace/mem.h @@ -25,7 +25,7 @@ static uint8_t trace_mem_get_info(TCGMemOp op, bool store); * * Return a value for the 'info' argument in guest memory access traces. */ -static uint8_t trace_mem_build_info(TCGMemOp size, bool sign_extend, +static uint8_t trace_mem_build_info(int size_shift, bool sign_extend, TCGMemOp endianness, bool store); -- cgit v1.1