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[81.231.233.234]) by smtp.gmail.com with ESMTPSA id 63sm3193836lja.19.2017.06.20.08.51.35 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 20 Jun 2017 08:51:35 -0700 (PDT) From: "Edgar E. Iglesias" To: qemu-devel@nongnu.org Date: Tue, 20 Jun 2017 17:51:24 +0200 Message-Id: <1497973886-26257-7-git-send-email-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1497973886-26257-1-git-send-email-edgar.iglesias@gmail.com> References: <1497973886-26257-1-git-send-email-edgar.iglesias@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4010:c07::241 Subject: [Qemu-devel] [PATCH v1 6/8] target-microblaze: Introduce a use-hw-mul property 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: sai.pavan.boddu@xilinx.com, edgar.iglesias@xilinx.com, alistai@xilinx.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: "Edgar E. Iglesias" Introduce a use-div property making multiplication instructions optional. Signed-off-by: Edgar E. Iglesias Reviewed-by: Alistair Francis --- target/microblaze/cpu.c | 12 ++++++++---- target/microblaze/cpu.h | 1 + target/microblaze/translate.c | 5 ++--- 3 files changed, 11 insertions(+), 7 deletions(-) diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c index 5bf2a29..70e4743 100644 --- a/target/microblaze/cpu.c +++ b/target/microblaze/cpu.c @@ -150,8 +150,7 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp) qemu_init_vcpu(cs); - env->pvr.regs[0] = PVR0_USE_HW_MUL_MASK \ - | PVR0_USE_EXC_MASK \ + env->pvr.regs[0] = PVR0_USE_EXC_MASK \ | PVR0_USE_ICACHE_MASK \ | PVR0_USE_DCACHE_MASK; env->pvr.regs[2] = PVR2_D_OPB_MASK \ @@ -160,8 +159,6 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp) | PVR2_I_LMB_MASK \ | PVR2_USE_MSR_INSTR \ | PVR2_USE_PCMP_INSTR \ - | PVR2_USE_HW_MUL_MASK \ - | PVR2_USE_MUL64_MASK \ | PVR2_FPU_EXC_MASK \ | 0; @@ -178,6 +175,7 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp) env->pvr.regs[0] |= (cpu->cfg.stackprot ? PVR0_SPROT_MASK : 0) | (cpu->cfg.use_fpu ? PVR0_USE_FPU_MASK : 0) | + (cpu->cfg.use_hw_mul ? PVR0_USE_HW_MUL_MASK : 0) | (cpu->cfg.use_barrel ? PVR0_USE_BARREL_MASK : 0) | (cpu->cfg.use_div ? PVR0_USE_DIV_MASK : 0) | (cpu->cfg.use_mmu ? PVR0_USE_MMU_MASK : 0) | @@ -187,6 +185,8 @@ static void mb_cpu_realizefn(DeviceState *dev, Error **errp) env->pvr.regs[2] |= (cpu->cfg.use_fpu ? PVR2_USE_FPU_MASK : 0) | (cpu->cfg.use_fpu > 1 ? PVR2_USE_FPU2_MASK : 0) | + (cpu->cfg.use_hw_mul ? PVR2_USE_HW_MUL_MASK : 0) | + (cpu->cfg.use_hw_mul > 1 ? PVR2_USE_MUL64_MASK : 0) | (cpu->cfg.use_barrel ? PVR2_USE_BARREL_MASK : 0) | (cpu->cfg.use_div ? PVR2_USE_DIV_MASK : 0); @@ -235,6 +235,10 @@ static Property mb_properties[] = { * are enabled */ DEFINE_PROP_UINT8("use-fpu", MicroBlazeCPU, cfg.use_fpu, 2), + /* If use-hw-mul > 0 - Multiplier is enabled + * If use-hw-mul = 2 - 64-bit multiplier is enabled + */ + DEFINE_PROP_UINT8("use-hw-mul", MicroBlazeCPU, cfg.use_hw_mul, 2), DEFINE_PROP_BOOL("use-barrel", MicroBlazeCPU, cfg.use_barrel, true), DEFINE_PROP_BOOL("use-div", MicroBlazeCPU, cfg.use_div, true), DEFINE_PROP_BOOL("use-mmu", MicroBlazeCPU, cfg.use_mmu, true), diff --git a/target/microblaze/cpu.h b/target/microblaze/cpu.h index 4397338..e202229 100644 --- a/target/microblaze/cpu.h +++ b/target/microblaze/cpu.h @@ -298,6 +298,7 @@ struct MicroBlazeCPU { bool stackprot; uint32_t base_vectors; uint8_t use_fpu; + uint8_t use_hw_mul; bool use_barrel; bool use_div; bool use_mmu; diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c index afe4bd4..36caa03 100644 --- a/target/microblaze/translate.c +++ b/target/microblaze/translate.c @@ -589,7 +589,7 @@ static void dec_mul(DisasContext *dc) if ((dc->tb_flags & MSR_EE_FLAG) && (dc->cpu->env.pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) - && !(dc->cpu->env.pvr.regs[0] & PVR0_USE_HW_MUL_MASK)) { + && !dc->cpu->cfg.use_hw_mul) { tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; @@ -604,8 +604,7 @@ static void dec_mul(DisasContext *dc) } /* mulh, mulhsu and mulhu are not available if C_USE_HW_MUL is < 2. */ - if (subcode >= 1 && subcode <= 3 - && !((dc->cpu->env.pvr.regs[2] & PVR2_USE_MUL64_MASK))) { + if (subcode >= 1 && subcode <= 3 && dc->cpu->cfg.use_hw_mul < 2) { /* nop??? */ }