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[125.228.20.175]) by smtp.gmail.com with ESMTPSA id i9-20020aa78b49000000b00666e883757fsm5705144pfd.123.2023.06.27.10.46.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jun 2023 10:46:11 -0700 (PDT) From: Max Chou To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org Cc: dbarboza@ventanamicro.com, Nazar Kazakov , Weiwei Li , Max Chou , Palmer Dabbelt , Alistair Francis , Bin Meng , Liu Zhiwei , Richard Henderson , Frank Chang Subject: [PATCH v6 03/15] target/riscv: Remove redundant "cpu_vl == 0" checks Date: Wed, 28 Jun 2023 01:45:37 +0800 Message-Id: <20230627174551.65498-4-max.chou@sifive.com> X-Mailer: git-send-email 2.39.2 (Apple Git-143) In-Reply-To: <20230627174551.65498-1-max.chou@sifive.com> References: <20230627174551.65498-1-max.chou@sifive.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42f; envelope-from=max.chou@sifive.com; helo=mail-pf1-x42f.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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Nazar Kazakov Remove the redundant "vl == 0" check which is already included within the vstart >= vl check, when vl == 0. Signed-off-by: Nazar Kazakov Reviewed-by: Weiwei Li Signed-off-by: Max Chou --- target/riscv/insn_trans/trans_rvv.c.inc | 31 +------------------------ 1 file changed, 1 insertion(+), 30 deletions(-) diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_trans/trans_rvv.c.inc index 4a8e62a8be..7e194aae34 100644 --- a/target/riscv/insn_trans/trans_rvv.c.inc +++ b/target/riscv/insn_trans/trans_rvv.c.inc @@ -617,7 +617,6 @@ static bool ldst_us_trans(uint32_t vd, uint32_t rs1, uint32_t data, TCGv_i32 desc; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -786,7 +785,6 @@ static bool ldst_stride_trans(uint32_t vd, uint32_t rs1, uint32_t rs2, TCGv_i32 desc; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -893,7 +891,6 @@ static bool ldst_index_trans(uint32_t vd, uint32_t rs1, uint32_t vs2, TCGv_i32 desc; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -1034,7 +1031,6 @@ static bool ldff_trans(uint32_t vd, uint32_t rs1, uint32_t data, TCGv_i32 desc; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -1191,7 +1187,6 @@ do_opivv_gvec(DisasContext *s, arg_rmrr *a, GVecGen3Fn *gvec_fn, return false; } - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); if (a->vm && s->vl_eq_vlmax && !(s->vta && s->lmul < 0)) { @@ -1241,7 +1236,6 @@ static bool opivx_trans(uint32_t vd, uint32_t rs1, uint32_t vs2, uint32_t vm, uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -1405,7 +1399,6 @@ static bool opivi_trans(uint32_t vd, uint32_t imm, uint32_t vs2, uint32_t vm, uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -1492,7 +1485,6 @@ static bool do_opivv_widen(DisasContext *s, arg_rmrr *a, if (checkfn(s, a)) { uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); data = FIELD_DP32(data, VDATA, VM, a->vm); @@ -1575,7 +1567,6 @@ static bool do_opiwv_widen(DisasContext *s, arg_rmrr *a, if (opiwv_widen_check(s, a)) { uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); data = FIELD_DP32(data, VDATA, VM, a->vm); @@ -1648,7 +1639,6 @@ static bool opivv_trans(uint32_t vd, uint32_t vs1, uint32_t vs2, uint32_t vm, { uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); data = FIELD_DP32(data, VDATA, VM, vm); @@ -1842,7 +1832,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \ gen_helper_##NAME##_w, \ }; \ TCGLabel *over = gen_new_label(); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2054,7 +2043,6 @@ static bool trans_vmv_v_v(DisasContext *s, arg_vmv_v_v *a) gen_helper_vmv_v_v_w, gen_helper_vmv_v_v_d, }; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); tcg_gen_gvec_2_ptr(vreg_ofs(s, a->rd), vreg_ofs(s, a->rs1), @@ -2078,7 +2066,6 @@ static bool trans_vmv_v_x(DisasContext *s, arg_vmv_v_x *a) vext_check_ss(s, a->rd, 0, 1)) { TCGv s1; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); s1 = get_gpr(s, a->rs1, EXT_SIGN); @@ -2140,7 +2127,6 @@ static bool trans_vmv_v_i(DisasContext *s, arg_vmv_v_i *a) gen_helper_vmv_v_x_w, gen_helper_vmv_v_x_d, }; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); s1 = tcg_constant_i64(simm); @@ -2288,7 +2274,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm(s, RISCV_FRM_DYN); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2323,7 +2308,6 @@ static bool opfvf_trans(uint32_t vd, uint32_t rs1, uint32_t vs2, TCGv_i64 t1; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); dest = tcg_temp_new_ptr(); @@ -2408,7 +2392,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm(s, RISCV_FRM_DYN); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over);\ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2483,7 +2466,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm(s, RISCV_FRM_DYN); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2601,7 +2583,6 @@ static bool do_opfv(DisasContext *s, arg_rmr *a, uint32_t data = 0; TCGLabel *over = gen_new_label(); gen_set_rm_chkfrm(s, rm); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); data = FIELD_DP32(data, VDATA, VM, a->vm); @@ -2713,7 +2694,6 @@ static bool trans_vfmv_v_f(DisasContext *s, arg_vfmv_v_f *a) gen_helper_vmv_v_x_d, }; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); t1 = tcg_temp_new_i64(); @@ -2792,7 +2772,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm_chkfrm(s, FRM); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2844,7 +2823,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm(s, RISCV_FRM_DYN); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2912,7 +2890,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm_chkfrm(s, FRM); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -2962,7 +2939,6 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a) \ }; \ TCGLabel *over = gen_new_label(); \ gen_set_rm_chkfrm(s, FRM); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, VM, a->vm); \ @@ -3053,7 +3029,6 @@ static bool trans_##NAME(DisasContext *s, arg_r *a) \ uint32_t data = 0; \ gen_helper_gvec_4_ptr *fn = gen_helper_##NAME; \ TCGLabel *over = gen_new_label(); \ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); \ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); \ \ data = FIELD_DP32(data, VDATA, LMUL, s->lmul); \ @@ -3224,7 +3199,6 @@ static bool trans_vid_v(DisasContext *s, arg_vid_v *a) require_vm(a->vm, a->rd)) { uint32_t data = 0; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); data = FIELD_DP32(data, VDATA, VM, a->vm); @@ -3411,7 +3385,6 @@ static bool trans_vmv_s_x(DisasContext *s, arg_vmv_s_x *a) TCGv s1; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); t1 = tcg_temp_new_i64(); @@ -3468,8 +3441,7 @@ static bool trans_vfmv_s_f(DisasContext *s, arg_vfmv_s_f *a) TCGv_i64 t1; TCGLabel *over = gen_new_label(); - /* if vl == 0 or vstart >= vl, skip vector register write back */ - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); + /* if vstart >= vl, skip vector register write back */ tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); /* NaN-box f[rs1] */ @@ -3720,7 +3692,6 @@ static bool int_ext_op(DisasContext *s, arg_rmr *a, uint8_t seq) uint32_t data = 0; gen_helper_gvec_3_ptr *fn; TCGLabel *over = gen_new_label(); - tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over); tcg_gen_brcond_tl(TCG_COND_GEU, cpu_vstart, cpu_vl, over); static gen_helper_gvec_3_ptr * const fns[6][4] = {