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X-Received-From: 2607:f8b0:400d:c0d::243 Subject: [Qemu-devel] [PATCH 1/8] coccinelle: add a script to optimize tcg op using tcg_gen_extract() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Philippe Mathieu-Daudé --- scripts/coccinelle/tcg_gen_extract.cocci | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 scripts/coccinelle/tcg_gen_extract.cocci diff --git a/scripts/coccinelle/tcg_gen_extract.cocci b/scripts/coccinelle/tcg_gen_extract.cocci new file mode 100644 index 0000000000..4080f97cc7 --- /dev/null +++ b/scripts/coccinelle/tcg_gen_extract.cocci @@ -0,0 +1,26 @@ +// optimize TCG using extract op +// +// Copyright: (C) 2017 Philippe Mathieu-Daudé. GPLv2. +// Confidence: High +// Options: --macro-file scripts/cocci-macro-file.h +@@ +identifier ret, arg; +constant ofs, len; +@@ +( +// from Nikunj A Dadhania comment: +// http://lists.nongnu.org/archive/html/qemu-devel/2017-02/msg05211.html +-tcg_gen_shri_tl(ret, arg, ofs); +-tcg_gen_andi_tl(ret, ret, len); ++tcg_gen_extract_tl(ret, arg, ofs, len); +| +// from Aurelien Jarno comment: +// http://lists.nongnu.org/archive/html/qemu-devel/2017-05/msg01466.html +-tcg_gen_shri_i32(ret, arg, ofs); +-tcg_gen_andi_i32(ret, ret, len); ++tcg_gen_extract_i32(ret, arg, ofs, len); +| +-tcg_gen_shri_i64(ret, arg, ofs); +-tcg_gen_andi_i64(ret, ret, len); ++tcg_gen_extract_i64(ret, arg, ofs, len); +)