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Tue, 09 Nov 2021 00:52:31 -0500 Received: by gandalf.ozlabs.org (Postfix, from userid 1007) id 4HpHDn6lTgz4xdg; Tue, 9 Nov 2021 16:52:09 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gibson.dropbear.id.au; s=201602; t=1636437129; bh=Z46H05beTCACEW2kShroQHAS/jQgfdZyD0t235PtTsY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XptuEVs2vrrsM9kwVZnnkBy0S5lpMp3BNYho+O/JHZvUFrgqHE5+a5a6yiNFZsDxP yqRT89YBCLbONyoo51j3vBpe9EvzKD0yYnTERSY4i4gP83olvqomJu9NOKvd2Ia8QY j+sgs36i6nR7MvBvm96zFpboyU5xlUuyq6fNJas4= From: David Gibson To: peter.maydell@linaro.org, clg@kaod.org, danielhb413@gmail.com, groug@kaod.org Subject: [PULL 07/54] target/ppc: Implement cntlzdm Date: Tue, 9 Nov 2021 16:51:17 +1100 Message-Id: <20211109055204.230765-8-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211109055204.230765-1-david@gibson.dropbear.id.au> References: <20211109055204.230765-1-david@gibson.dropbear.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2404:9400:2:0:216:3eff:fee2:21ea (failed) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2404:9400:2:0:216:3eff:fee2:21ea; envelope-from=dgibson@gandalf.ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RDNS_NONE=0.793, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Henderson , qemu-devel@nongnu.org, Luis Pires , qemu-ppc@nongnu.org, Matheus Ferst , David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1636438270662100001 Content-Type: text/plain; charset="utf-8" From: Luis Pires Implement the following PowerISA v3.1 instruction: cntlzdm: Count Leading Zeros Doubleword Under Bit Mask Suggested-by: Richard Henderson Signed-off-by: Luis Pires Signed-off-by: Matheus Ferst Message-Id: <20211029202424.175401-8-matheus.ferst@eldorado.org.br> Reviewed-by: Richard Henderson Signed-off-by: David Gibson --- target/ppc/insn32.decode | 1 + target/ppc/translate/fixedpoint-impl.c.inc | 36 ++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode index 7ff8c25ac5..eb3383c99c 100644 --- a/target/ppc/insn32.decode +++ b/target/ppc/insn32.decode @@ -124,6 +124,7 @@ ADDPCIS 010011 ..... ..... .......... 00010 . = @DX ## Fixed-Point Logical Instructions =20 CFUGED 011111 ..... ..... ..... 0011011100 - @X +CNTLZDM 011111 ..... ..... ..... 0000111011 - @X =20 ### Float-Point Load Instructions =20 diff --git a/target/ppc/translate/fixedpoint-impl.c.inc b/target/ppc/transl= ate/fixedpoint-impl.c.inc index 0d9c6e0996..c9e9ae35df 100644 --- a/target/ppc/translate/fixedpoint-impl.c.inc +++ b/target/ppc/translate/fixedpoint-impl.c.inc @@ -413,3 +413,39 @@ static bool trans_CFUGED(DisasContext *ctx, arg_X *a) #endif return true; } + +#if defined(TARGET_PPC64) +static void do_cntlzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask) +{ + TCGv_i64 tmp; + TCGLabel *l1; + + tmp =3D tcg_temp_local_new_i64(); + l1 =3D gen_new_label(); + + tcg_gen_and_i64(tmp, src, mask); + tcg_gen_clzi_i64(tmp, tmp, 64); + + tcg_gen_brcondi_i64(TCG_COND_EQ, tmp, 0, l1); + + tcg_gen_subfi_i64(tmp, 64, tmp); + tcg_gen_shr_i64(tmp, mask, tmp); + tcg_gen_ctpop_i64(tmp, tmp); + + gen_set_label(l1); + + tcg_gen_mov_i64(dst, tmp); +} +#endif + +static bool trans_CNTLZDM(DisasContext *ctx, arg_X *a) +{ + REQUIRE_64BIT(ctx); + REQUIRE_INSNS_FLAGS2(ctx, ISA310); +#if defined(TARGET_PPC64) + do_cntlzdm(cpu_gpr[a->ra], cpu_gpr[a->rt], cpu_gpr[a->rb]); +#else + qemu_build_not_reached(); +#endif + return true; +} --=20 2.33.1