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([71.212.149.95]) by smtp.gmail.com with ESMTPSA id w17-20020a63f511000000b005b61a024ec7sm2176380pgh.74.2023.10.18.14.51.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Oct 2023 14:51:53 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: deller@gmx.de Subject: [PATCH 21/61] target/hppa: sar register allows only 5 bits on 32-bit CPU Date: Wed, 18 Oct 2023 14:50:55 -0700 Message-Id: <20231018215135.1561375-22-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231018215135.1561375-1-richard.henderson@linaro.org> References: <20231018215135.1561375-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::430; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x430.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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Helge Deller The sar shift amount register is limited to 5 bits when running a 32-bit CPU. Strip off the remaining bits. The interesting part is, that this register allows to detect at runtime if a physical CPU is capable to execute PA2.0 (64-bit) instructions. Signed-off-by: Helge Deller --- target/hppa/translate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/hppa/translate.c b/target/hppa/translate.c index ace6fb0ab2..e2b692a6c5 100644 --- a/target/hppa/translate.c +++ b/target/hppa/translate.c @@ -2155,7 +2155,7 @@ static bool trans_mtctl(DisasContext *ctx, arg_mtctl *a) if (ctl == CR_SAR) { reg = load_gpr(ctx, a->r); tmp = tcg_temp_new(); - tcg_gen_andi_reg(tmp, reg, TARGET_REGISTER_BITS - 1); + tcg_gen_andi_reg(tmp, reg, ctx->is_pa20 ? 63 : 31); save_or_nullify(ctx, cpu_sar, tmp); cond_free(&ctx->null_cond); @@ -2216,7 +2216,7 @@ static bool trans_mtsarcm(DisasContext *ctx, arg_mtsarcm *a) TCGv_reg tmp = tcg_temp_new(); tcg_gen_not_reg(tmp, load_gpr(ctx, a->r)); - tcg_gen_andi_reg(tmp, tmp, TARGET_REGISTER_BITS - 1); + tcg_gen_andi_reg(tmp, tmp, ctx->is_pa20 ? 63 : 31); save_or_nullify(ctx, cpu_sar, tmp); cond_free(&ctx->null_cond);