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Mon, 21 Jun 2021 16:18:57 -0700 (PDT) Received: from localhost.localdomain ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id 135sm14429952pgf.20.2021.06.21.16.18.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Jun 2021 16:18:57 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 10/29] tcg/ppc: Split out tcg_out_bswap64 Date: Mon, 21 Jun 2021 16:18:30 -0700 Message-Id: <20210621231849.1871164-11-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210621231849.1871164-1-richard.henderson@linaro.org> References: <20210621231849.1871164-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::431; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x431.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: Peter Maydell Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- tcg/ppc/tcg-target.c.inc | 64 +++++++++++++++++++++------------------- 1 file changed, 34 insertions(+), 30 deletions(-) diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc index 28b8671cba..da6d10722e 100644 --- a/tcg/ppc/tcg-target.c.inc +++ b/tcg/ppc/tcg-target.c.inc @@ -828,6 +828,39 @@ static void tcg_out_bswap32(TCGContext *s, TCGReg dst, TCGReg src) tcg_out_mov(s, TCG_TYPE_REG, dst, tmp); } +static void tcg_out_bswap64(TCGContext *s, TCGReg dst, TCGReg src) +{ + TCGReg t0 = dst == src ? TCG_REG_R0 : dst; + TCGReg t1 = dst == src ? dst : TCG_REG_R0; + + /* + * In the following, + * dep(a, b, m) -> (a & ~m) | (b & m) + * + * Begin with: src = abcdefgh + */ + /* t0 = rol32(src, 8) & 0xffffffff = 0000fghe */ + tcg_out_rlw(s, RLWINM, t0, src, 8, 0, 31); + /* t0 = dep(t0, rol32(src, 24), 0xff000000) = 0000hghe */ + tcg_out_rlw(s, RLWIMI, t0, src, 24, 0, 7); + /* t0 = dep(t0, rol32(src, 24), 0x0000ff00) = 0000hgfe */ + tcg_out_rlw(s, RLWIMI, t0, src, 24, 16, 23); + + /* t0 = rol64(t0, 32) = hgfe0000 */ + tcg_out_rld(s, RLDICL, t0, t0, 32, 0); + /* t1 = rol64(src, 32) = efghabcd */ + tcg_out_rld(s, RLDICL, t1, src, 32, 0); + + /* t0 = dep(t0, rol32(t1, 24), 0xffffffff) = hgfebcda */ + tcg_out_rlw(s, RLWIMI, t0, t1, 8, 0, 31); + /* t0 = dep(t0, rol32(t1, 24), 0xff000000) = hgfedcda */ + tcg_out_rlw(s, RLWIMI, t0, t1, 24, 0, 7); + /* t0 = dep(t0, rol32(t1, 24), 0x0000ff00) = hgfedcba */ + tcg_out_rlw(s, RLWIMI, t0, t1, 24, 16, 23); + + tcg_out_mov(s, TCG_TYPE_REG, dst, t0); +} + /* Emit a move into ret of arg, if it can be done in one insn. */ static bool tcg_out_movi_one(TCGContext *s, TCGReg ret, tcg_target_long arg) { @@ -2824,37 +2857,8 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, case INDEX_op_bswap32_i64: tcg_out_bswap32(s, args[0], args[1]); break; - case INDEX_op_bswap64_i64: - a0 = args[0], a1 = args[1], a2 = TCG_REG_R0; - if (a0 == a1) { - a0 = TCG_REG_R0; - a2 = a1; - } - - /* a1 = # abcd efgh */ - /* a0 = rl32(a1, 8) # 0000 fghe */ - tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31); - /* a0 = dep(a0, rl32(a1, 24), 0xff000000) # 0000 hghe */ - tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7); - /* a0 = dep(a0, rl32(a1, 24), 0x0000ff00) # 0000 hgfe */ - tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23); - - /* a0 = rl64(a0, 32) # hgfe 0000 */ - /* a2 = rl64(a1, 32) # efgh abcd */ - tcg_out_rld(s, RLDICL, a0, a0, 32, 0); - tcg_out_rld(s, RLDICL, a2, a1, 32, 0); - - /* a0 = dep(a0, rl32(a2, 8), 0xffffffff) # hgfe bcda */ - tcg_out_rlw(s, RLWIMI, a0, a2, 8, 0, 31); - /* a0 = dep(a0, rl32(a2, 24), 0xff000000) # hgfe dcda */ - tcg_out_rlw(s, RLWIMI, a0, a2, 24, 0, 7); - /* a0 = dep(a0, rl32(a2, 24), 0x0000ff00) # hgfe dcba */ - tcg_out_rlw(s, RLWIMI, a0, a2, 24, 16, 23); - - if (a0 == 0) { - tcg_out_mov(s, TCG_TYPE_REG, args[0], a0); - } + tcg_out_bswap64(s, args[0], args[1]); break; case INDEX_op_deposit_i32: -- 2.25.1