From patchwork Fri Apr 16 21:01:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1467330 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=P3CInz08; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4FMTfj3GMWz9sVw for ; Sat, 17 Apr 2021 07:21:33 +1000 (AEST) Received: from localhost ([::1]:42560 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lXVu7-0003Wu-4q for incoming@patchwork.ozlabs.org; Fri, 16 Apr 2021 17:21:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44228) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lXVcX-0004qG-F4 for qemu-devel@nongnu.org; Fri, 16 Apr 2021 17:03:21 -0400 Received: from mail-pj1-x1034.google.com ([2607:f8b0:4864:20::1034]:33738) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lXVcP-0001Hg-He for qemu-devel@nongnu.org; Fri, 16 Apr 2021 17:03:21 -0400 Received: by mail-pj1-x1034.google.com with SMTP id kb13-20020a17090ae7cdb02901503d67f0beso3639629pjb.0 for ; Fri, 16 Apr 2021 14:03:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4NnADjclEJcrO+T+qGPsu3IX/25Q5Wz2cI8VcHKA8p0=; b=P3CInz08lWNB/QhCwsz2Du7ufQW6JVpfEUr4zIPylD4DLB8YfQXTT18MvJ4REyBciB 6uaCJbCaRHt2myoOZq7prkGs8sLBO8NsLCHWQZSqSoPv8mhiKjtqfHtgkR8SSbfRFttQ TIBcyZLRV9eEDjb2lwVi1lAbyTxnwKrUVvwgK2VUcvBdqwM0J3tmojtk3kFecqOB50cB rGaJ6OaoSM5aBmnKgEPi3UO0mUyKGDnphpgBvkdTyHnqpHJJ1xKTmn563xdvg8BNMG5F nscPDLMDLEluoC+OAafA6yyV+LaLI9YcAy+cg33ztavt+Oo0tMhLVIYjbWTlpGFRVrFv jEwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4NnADjclEJcrO+T+qGPsu3IX/25Q5Wz2cI8VcHKA8p0=; b=Ed/eDZVtGvo7xR7gyUtnXduUcwc0c+ckNJqZ6khUxBY7hPSbqpMyFztvD0Jpp3toKN jdt+DQBkuidAPuRP9DgpsBoc4DO3W8LUEIrwKpSR1YzRBlTVRno+7djCD+eSOX1/wHIy kqHxMiN2Eh/BEgxjXiHDnS9Mo/rR34yZVeyRWbyycSCrJPQxjEualLqqw8gSyuNcmCy8 Ubt8dB+xPugV9aGJeZ7SZLlAbw7dDE2iagcn087XRYvS8fATm5zS0lZI4p0vpQdTN8Es lz+NYNcC3h0oQhepAug69Q6zTfXmTIaHm7eSpHIEJ6EMvEoKojpxdbveEbghgb8uZZw1 K6ug== X-Gm-Message-State: AOAM5331MZteWIqHGse5ISJLJ/dE/z2KNTR93KBvEyIygyrRfStnKYzl 5dmaRl/PfG/zBYLr6BCe8er1lB7bbwS7iQ== X-Google-Smtp-Source: ABdhPJzH9I/d6h/742QlsLA17ytKEtHVDnb+zlRMG+rwCWCuyPKAvmQdcuwRMIqw4w1FUf4y2D+laQ== X-Received: by 2002:a17:90a:4d8a:: with SMTP id m10mr11186681pjh.42.1618606992100; Fri, 16 Apr 2021 14:03:12 -0700 (PDT) Received: from localhost.localdomain ([71.212.131.83]) by smtp.gmail.com with ESMTPSA id m15sm5920640pjz.36.2021.04.16.14.03.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Apr 2021 14:03:11 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 30/81] target/arm: Implement SVE2 WHILEGT, WHILEGE, WHILEHI, WHILEHS Date: Fri, 16 Apr 2021 14:01:49 -0700 Message-Id: <20210416210240.1591291-31-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210416210240.1591291-1-richard.henderson@linaro.org> References: <20210416210240.1591291-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1034; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1034.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=unavailable 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: qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Rename the existing sve_while (less-than) helper to sve_whilel to make room for a new sve_whileg helper for greater-than. Signed-off-by: Richard Henderson --- v2: Use a new helper function to implement this. v4: Update for PREDDESC. --- target/arm/helper-sve.h | 3 +- target/arm/sve.decode | 2 +- target/arm/sve_helper.c | 38 +++++++++++++++++++++++++- target/arm/translate-sve.c | 56 ++++++++++++++++++++++++++++---------- 4 files changed, 82 insertions(+), 17 deletions(-) diff --git a/target/arm/helper-sve.h b/target/arm/helper-sve.h index 1c7fe8e417..5bf9fdc7a3 100644 --- a/target/arm/helper-sve.h +++ b/target/arm/helper-sve.h @@ -913,7 +913,8 @@ DEF_HELPER_FLAGS_4(sve_brkns, TCG_CALL_NO_RWG, i32, ptr, ptr, ptr, i32) DEF_HELPER_FLAGS_3(sve_cntp, TCG_CALL_NO_RWG, i64, ptr, ptr, i32) -DEF_HELPER_FLAGS_3(sve_while, TCG_CALL_NO_RWG, i32, ptr, i32, i32) +DEF_HELPER_FLAGS_3(sve_whilel, TCG_CALL_NO_RWG, i32, ptr, i32, i32) +DEF_HELPER_FLAGS_3(sve_whileg, TCG_CALL_NO_RWG, i32, ptr, i32, i32) DEF_HELPER_FLAGS_4(sve_subri_b, TCG_CALL_NO_RWG, void, ptr, ptr, i64, i32) DEF_HELPER_FLAGS_4(sve_subri_h, TCG_CALL_NO_RWG, void, ptr, ptr, i64, i32) diff --git a/target/arm/sve.decode b/target/arm/sve.decode index 0674464695..ae853d21f2 100644 --- a/target/arm/sve.decode +++ b/target/arm/sve.decode @@ -700,7 +700,7 @@ SINCDECP_z 00100101 .. 1010 d:1 u:1 10000 00 .... ..... @incdec2_pred CTERM 00100101 1 sf:1 1 rm:5 001000 rn:5 ne:1 0000 # SVE integer compare scalar count and limit -WHILE 00100101 esz:2 1 rm:5 000 sf:1 u:1 1 rn:5 eq:1 rd:4 +WHILE 00100101 esz:2 1 rm:5 000 sf:1 u:1 lt:1 rn:5 eq:1 rd:4 ### SVE Integer Wide Immediate - Unpredicated Group diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c index 02e87c535d..fb38f2c57e 100644 --- a/target/arm/sve_helper.c +++ b/target/arm/sve_helper.c @@ -3745,7 +3745,7 @@ uint64_t HELPER(sve_cntp)(void *vn, void *vg, uint32_t pred_desc) return sum; } -uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc) +uint32_t HELPER(sve_whilel)(void *vd, uint32_t count, uint32_t pred_desc) { intptr_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ); intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ); @@ -3771,6 +3771,42 @@ uint32_t HELPER(sve_while)(void *vd, uint32_t count, uint32_t pred_desc) return predtest_ones(d, oprsz, esz_mask); } +uint32_t HELPER(sve_whileg)(void *vd, uint32_t count, uint32_t pred_desc) +{ + intptr_t oprsz = FIELD_EX32(pred_desc, PREDDESC, OPRSZ); + intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ); + uint64_t esz_mask = pred_esz_masks[esz]; + ARMPredicateReg *d = vd; + intptr_t i, invcount, oprbits; + uint64_t bits; + + if (count == 0) { + return do_zero(d, oprsz); + } + + oprbits = oprsz * 8; + tcg_debug_assert(count <= oprbits); + + bits = esz_mask; + if (oprbits & 63) { + bits &= MAKE_64BIT_MASK(0, oprbits & 63); + } + + invcount = oprbits - count; + for (i = (oprsz - 1) / 8; i > invcount / 64; --i) { + d->p[i] = bits; + bits = esz_mask; + } + + d->p[i] = bits & MAKE_64BIT_MASK(invcount & 63, 64); + + while (--i >= 0) { + d->p[i] = 0; + } + + return predtest_ones(d, oprsz, esz_mask); +} + /* Recursive reduction on a function; * C.f. the ARM ARM function ReducePredicated. * diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c index 218f1ca5ce..aff85b0220 100644 --- a/target/arm/translate-sve.c +++ b/target/arm/translate-sve.c @@ -3112,7 +3112,14 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *a) unsigned vsz = vec_full_reg_size(s); unsigned desc = 0; TCGCond cond; + uint64_t maxval; + /* Note that GE/HS has a->eq == 0 and GT/HI has a->eq == 1. */ + bool eq = a->eq == a->lt; + /* The greater-than conditions are all SVE2. */ + if (!a->lt && !dc_isar_feature(aa64_sve2, s)) { + return false; + } if (!sve_access_check(s)) { return true; } @@ -3135,22 +3142,42 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *a) */ t0 = tcg_temp_new_i64(); t1 = tcg_temp_new_i64(); - tcg_gen_sub_i64(t0, op1, op0); + + if (a->lt) { + tcg_gen_sub_i64(t0, op1, op0); + if (a->u) { + maxval = a->sf ? UINT64_MAX : UINT32_MAX; + cond = eq ? TCG_COND_LEU : TCG_COND_LTU; + } else { + maxval = a->sf ? INT64_MAX : INT32_MAX; + cond = eq ? TCG_COND_LE : TCG_COND_LT; + } + } else { + tcg_gen_sub_i64(t0, op0, op1); + if (a->u) { + maxval = 0; + cond = eq ? TCG_COND_GEU : TCG_COND_GTU; + } else { + maxval = a->sf ? INT64_MIN : INT32_MIN; + cond = eq ? TCG_COND_GE : TCG_COND_GT; + } + } tmax = tcg_const_i64(vsz >> a->esz); - if (a->eq) { + if (eq) { /* Equality means one more iteration. */ tcg_gen_addi_i64(t0, t0, 1); - /* If op1 is max (un)signed integer (and the only time the addition - * above could overflow), then we produce an all-true predicate by - * setting the count to the vector length. This is because the - * pseudocode is described as an increment + compare loop, and the - * max integer would always compare true. + /* + * For the less-than while, if op1 is maxval (and the only time + * the addition above could overflow), then we produce an all-true + * predicate by setting the count to the vector length. This is + * because the pseudocode is described as an increment + compare + * loop, and the maximum integer would always compare true. + * Similarly, the greater-than while has the same issue with the + * minimum integer due to the decrement + compare loop. */ - tcg_gen_movi_i64(t1, (a->sf - ? (a->u ? UINT64_MAX : INT64_MAX) - : (a->u ? UINT32_MAX : INT32_MAX))); + tcg_gen_movi_i64(t1, maxval); tcg_gen_movcond_i64(TCG_COND_EQ, t0, op1, t1, tmax, t0); } @@ -3159,9 +3186,6 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *a) tcg_temp_free_i64(tmax); /* Set the count to zero if the condition is false. */ - cond = (a->u - ? (a->eq ? TCG_COND_LEU : TCG_COND_LTU) - : (a->eq ? TCG_COND_LE : TCG_COND_LT)); tcg_gen_movi_i64(t1, 0); tcg_gen_movcond_i64(cond, t0, op0, op1, t0, t1); tcg_temp_free_i64(t1); @@ -3181,7 +3205,11 @@ static bool trans_WHILE(DisasContext *s, arg_WHILE *a) ptr = tcg_temp_new_ptr(); tcg_gen_addi_ptr(ptr, cpu_env, pred_full_reg_offset(s, a->rd)); - gen_helper_sve_while(t2, ptr, t2, t3); + if (a->lt) { + gen_helper_sve_whilel(t2, ptr, t2, t3); + } else { + gen_helper_sve_whileg(t2, ptr, t2, t3); + } do_pred_flags(t2); tcg_temp_free_ptr(ptr);