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X-Received-From: 2607:f8b0:4864:20::b44 Subject: [Qemu-devel] [RFC PATCH v4 22/75] target/i386: introduce modrm operand X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jan Bobek , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This permits the ModR/M byte to be passed raw into the code generator, effectively allowing to short-circuit the operand decoding mechanism and do the decoding work manually in the code generator. Signed-off-by: Jan Bobek --- target/i386/translate.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/target/i386/translate.c b/target/i386/translate.c index 80cfb59978..a0a9f64ff3 100644 --- a/target/i386/translate.c +++ b/target/i386/translate.c @@ -4771,6 +4771,26 @@ INSNOP_FINALIZE(tcg_i64) tcg_temp_free_i64(arg); } +/* + * modrm + * + * Operand whose value is the ModR/M byte. + */ +typedef int insnop_arg_t(modrm); +typedef struct {} insnop_ctxt_t(modrm); + +INSNOP_INIT(modrm) +{ + return true; +} +INSNOP_PREPARE(modrm) +{ + return modrm; +} +INSNOP_FINALIZE(modrm) +{ +} + static void gen_sse_ng(CPUX86State *env, DisasContext *s, int b) { enum { -- 2.20.1