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Sat, 21 Jun 2025 16:54:27 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 076/101] target/arm: Implement SVE2p1 WHILE (predicate pair) Date: Sat, 21 Jun 2025 16:50:12 -0700 Message-ID: <20250621235037.74091-77-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250621235037.74091-1-richard.henderson@linaro.org> References: <20250621235037.74091-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::42f; envelope-from=richard.henderson@linaro.org; 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 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1750550325288116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- target/arm/tcg/helper-sve.h | 3 +++ target/arm/tcg/sve_helper.c | 44 ++++++++++++++++++++++++++++++++++ target/arm/tcg/translate-sve.c | 14 +++++++---- target/arm/tcg/sve.decode | 8 +++++++ 4 files changed, 65 insertions(+), 4 deletions(-) diff --git a/target/arm/tcg/helper-sve.h b/target/arm/tcg/helper-sve.h index 0b1b588783..eac23e75b9 100644 --- a/target/arm/tcg/helper-sve.h +++ b/target/arm/tcg/helper-sve.h @@ -941,6 +941,9 @@ DEF_HELPER_FLAGS_3(sve_cntp, TCG_CALL_NO_RWG, i64, ptr,= ptr, 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) =20 +DEF_HELPER_FLAGS_3(sve_while2l, TCG_CALL_NO_RWG, i32, ptr, i32, i32) +DEF_HELPER_FLAGS_3(sve_while2g, 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) DEF_HELPER_FLAGS_4(sve_subri_s, TCG_CALL_NO_RWG, void, ptr, ptr, i64, i32) diff --git a/target/arm/tcg/sve_helper.c b/target/arm/tcg/sve_helper.c index dbb88e9a39..2beb012292 100644 --- a/target/arm/tcg/sve_helper.c +++ b/target/arm/tcg/sve_helper.c @@ -4157,6 +4157,28 @@ uint32_t HELPER(sve_whilel)(void *vd, uint32_t count= , uint32_t pred_desc) return pred_count_test(oprbits, count, false); } =20 +uint32_t HELPER(sve_while2l)(void *vd, uint32_t count, uint32_t pred_desc) +{ + uint32_t oprsz =3D FIELD_EX32(pred_desc, PREDDESC, OPRSZ); + uint32_t esz =3D FIELD_EX32(pred_desc, PREDDESC, ESZ); + uint32_t oprbits =3D oprsz * 8; + uint64_t esz_mask =3D pred_esz_masks[esz]; + ARMPredicateReg *d =3D vd; + + do_zero(&d[0], oprsz); + do_zero(&d[1], oprsz); + + count <<=3D esz; + if (count <=3D oprbits) { + do_whilel(d[0].p, esz_mask, count, oprbits); + } else { + do_whilel(d[0].p, esz_mask, oprbits, oprbits); + do_whilel(d[1].p, esz_mask, count - oprbits, oprbits); + } + + return pred_count_test(2 * oprbits, count, false); +} + static void do_whileg(uint64_t *d, uint64_t esz_mask, uint32_t count, uint32_t oprbits) { @@ -4190,6 +4212,28 @@ uint32_t HELPER(sve_whileg)(void *vd, uint32_t count= , uint32_t pred_desc) return pred_count_test(oprbits, count, true); } =20 +uint32_t HELPER(sve_while2g)(void *vd, uint32_t count, uint32_t pred_desc) +{ + uint32_t oprsz =3D FIELD_EX32(pred_desc, PREDDESC, OPRSZ); + uint32_t esz =3D FIELD_EX32(pred_desc, PREDDESC, ESZ); + uint32_t oprbits =3D oprsz * 8; + uint64_t esz_mask =3D pred_esz_masks[esz]; + ARMPredicateReg *d =3D vd; + + do_zero(&d[0], oprsz); + do_zero(&d[1], oprsz); + + count <<=3D esz; + if (count <=3D oprbits) { + do_whileg(d[0].p, esz_mask, count, oprbits); + } else { + do_whileg(d[0].p, esz_mask, oprbits, oprbits); + do_whileg(d[1].p, esz_mask, count - oprbits, oprbits); + } + + return pred_count_test(2 * oprbits, count, true); +} + /* Recursive reduction on a function; * C.f. the ARM ARM function ReducePredicated. * diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c index 9a6fa8ee8a..c2a5b2f76f 100644 --- a/target/arm/tcg/translate-sve.c +++ b/target/arm/tcg/translate-sve.c @@ -3092,7 +3092,8 @@ static bool trans_CTERM(DisasContext *s, arg_CTERM *a) } =20 typedef void gen_while_fn(TCGv_i32, TCGv_ptr, TCGv_i32, TCGv_i32); -static bool do_WHILE(DisasContext *s, arg_while *a, bool lt, gen_while_fn = *fn) +static bool do_WHILE(DisasContext *s, arg_while *a, + bool lt, int scale, gen_while_fn *fn) { TCGv_i64 op0, op1, t0, t1, tmax; TCGv_i32 t2; @@ -3147,7 +3148,7 @@ static bool do_WHILE(DisasContext *s, arg_while *a, b= ool lt, gen_while_fn *fn) } } =20 - tmax =3D tcg_constant_i64(vsz >> a->esz); + tmax =3D tcg_constant_i64((vsz << scale) >> a->esz); if (eq) { /* Equality means one more iteration. */ tcg_gen_addi_i64(t0, t0, 1); @@ -3188,8 +3189,13 @@ static bool do_WHILE(DisasContext *s, arg_while *a, = bool lt, gen_while_fn *fn) return true; } =20 -TRANS_FEAT(WHILE_lt, aa64_sve, do_WHILE, a, true, gen_helper_sve_whilel) -TRANS_FEAT(WHILE_gt, aa64_sve2, do_WHILE, a, false, gen_helper_sve_whileg) +TRANS_FEAT(WHILE_lt, aa64_sve, do_WHILE, a, true, 0, gen_helper_sve_whilel) +TRANS_FEAT(WHILE_gt, aa64_sve2, do_WHILE, a, false, 0, gen_helper_sve_whil= eg) + +TRANS_FEAT(WHILE_lt_pair, aa64_sme2_or_sve2p1, do_WHILE, + a, true, 1, gen_helper_sve_while2l) +TRANS_FEAT(WHILE_gt_pair, aa64_sme2_or_sve2p1, do_WHILE, + a, false, 1, gen_helper_sve_while2g) =20 static bool trans_WHILE_ptr(DisasContext *s, arg_WHILE_ptr *a) { diff --git a/target/arm/tcg/sve.decode b/target/arm/tcg/sve.decode index 525c11f5d4..a919fe117b 100644 --- a/target/arm/tcg/sve.decode +++ b/target/arm/tcg/sve.decode @@ -796,6 +796,14 @@ WHILE_gt 00100101 esz:2 1 rm:5 000 sf:1 u:1 0 r= n:5 eq:1 rd:4 &while # SVE2 pointer conflict compare WHILE_ptr 00100101 esz:2 1 rm:5 001 100 rn:5 rw:1 rd:4 =20 +# SVE2.1 predicate pair +%pd_pair 1:3 !function=3Dtimes_2 +@while_pair ........ esz:2 . rm:5 .... u:1 . rn:5 . ... eq:1 \ + &while rd=3D%pd_pair sf=3D1 + +WHILE_lt_pair 00100101 .. 1 ..... 0101 . 1 ..... 1 ... . @while_pair +WHILE_gt_pair 00100101 .. 1 ..... 0101 . 0 ..... 1 ... . @while_pair + ### SVE Integer Wide Immediate - Unpredicated Group =20 # SVE broadcast floating-point immediate (unpredicated) --=20 2.43.0