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Sat, 21 Jun 2025 16:57:40 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 097/101] target/arm: Implement LUTI2, LUTI4 for SME2/SME2p1 Date: Sat, 21 Jun 2025 16:50:33 -0700 Message-ID: <20250621235037.74091-98-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::432; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x432.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: 1750550496876116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Richard Henderson --- target/arm/tcg/helper-sme.h | 24 ++++++++++++++ target/arm/tcg/vec_internal.h | 15 +++++++++ target/arm/tcg/sme_helper.c | 59 ++++++++++++++++++++++++++++++++++ target/arm/tcg/sve_helper.c | 15 --------- target/arm/tcg/translate-sme.c | 56 ++++++++++++++++++++++++++++++++ target/arm/tcg/sme.decode | 42 ++++++++++++++++++++++++ 6 files changed, 196 insertions(+), 15 deletions(-) diff --git a/target/arm/tcg/helper-sme.h b/target/arm/tcg/helper-sme.h index 98cab8d920..d86fdcbd83 100644 --- a/target/arm/tcg/helper-sme.h +++ b/target/arm/tcg/helper-sme.h @@ -312,3 +312,27 @@ DEF_HELPER_FLAGS_5(sme2_fclamp_h, TCG_CALL_NO_RWG, voi= d, ptr, ptr, ptr, fpst, i3 DEF_HELPER_FLAGS_5(sme2_fclamp_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, fp= st, i32) DEF_HELPER_FLAGS_5(sme2_fclamp_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, fp= st, i32) DEF_HELPER_FLAGS_5(sme2_bfclamp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, fps= t, i32) + +DEF_HELPER_FLAGS_4(sme2_luti2_1b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_1h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_1s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) + +DEF_HELPER_FLAGS_4(sme2_luti2_2b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_2h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_2s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) + +DEF_HELPER_FLAGS_4(sme2_luti2_4b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_4h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti2_4s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) + +DEF_HELPER_FLAGS_4(sme2_luti4_1b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_1h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_1s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) + +DEF_HELPER_FLAGS_4(sme2_luti4_2b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_2h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_2s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) + +DEF_HELPER_FLAGS_4(sme2_luti4_4b, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_4h, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) +DEF_HELPER_FLAGS_4(sme2_luti4_4s, TCG_CALL_NO_RWG, void, ptr, ptr, env, i3= 2) diff --git a/target/arm/tcg/vec_internal.h b/target/arm/tcg/vec_internal.h index 0d806b73c4..14fb688eaa 100644 --- a/target/arm/tcg/vec_internal.h +++ b/target/arm/tcg/vec_internal.h @@ -334,4 +334,19 @@ static inline float64 float64_maybe_ah_chs(float64 a, = bool fpcr_ah) bfloat16 helper_sme2_ah_fmax_b16(bfloat16 a, bfloat16 b, float_status *fps= t); bfloat16 helper_sme2_ah_fmin_b16(bfloat16 a, bfloat16 b, float_status *fps= t); =20 +static inline uint64_t extractn(uint64_t *p, unsigned pos, unsigned len) +{ + uint64_t x; + + p +=3D pos / 64; + pos =3D pos % 64; + + x =3D p[0]; + if (pos + len > 64) { + x =3D (x >> pos) | (p[1] << (-pos & 63)); + pos =3D 0; + } + return extract64(x, pos, len); +} + #endif /* TARGET_ARM_VEC_INTERNAL_H */ diff --git a/target/arm/tcg/sme_helper.c b/target/arm/tcg/sme_helper.c index 807b160c90..7757085adf 100644 --- a/target/arm/tcg/sme_helper.c +++ b/target/arm/tcg/sme_helper.c @@ -2020,3 +2020,62 @@ FCLAMP(sme2_fclamp_d, float64, H8) FCLAMP(sme2_bfclamp, bfloat16, H2) =20 #undef FCLAMP + +#define DO_LUT_PRIM(SUFF, TYPE, H) \ +static inline void do_lut_##SUFF \ + (void *zd, uint64_t *indexes, uint32_t *zt0, unsigned elements, \ + unsigned segment, unsigned dstride, unsigned isize, unsigned nreg) \ +{ \ + for (unsigned r =3D 0; r < nreg; ++r) { \ + TYPE *dst =3D zd + dstride * r; \ + unsigned base =3D (segment + r) * elements; \ + for (unsigned e =3D 0; e < elements; ++e) { \ + unsigned index =3D extractn(indexes, base + e * isize, isize);= \ + dst[H(e)] =3D zt0[H4(index)]; \ + } \ + } \ +} + +DO_LUT_PRIM(b, uint8_t, H1) +DO_LUT_PRIM(h, uint16_t, H2) +DO_LUT_PRIM(s, uint32_t, H4) + +#define DO_LUT(ISIZE, NREG, SUFF, TYPE) \ +void helper_sme2_luti##ISIZE##_##NREG##SUFF \ + (void *zd, void *zn, CPUARMState *env, uint32_t desc) \ +{ \ + unsigned vl =3D simd_oprsz(desc); \ + unsigned strided =3D extract32(desc, SIMD_DATA_SHIFT, 1); \ + unsigned idx =3D extract32(desc, SIMD_DATA_SHIFT + 1, 4); \ + unsigned dstride =3D (!strided ? 1 : NREG =3D=3D 4 ? 4 : 8); = \ + unsigned segments =3D sizeof(TYPE) / (ISIZE * NREG); \ + unsigned segment =3D idx & (segments - 1); \ + ARMVectorReg indexes; \ + memcpy(&indexes, zn, vl); \ + do_lut_##SUFF(zd, indexes.d, (uint32_t *)&env->za_state.zt0, \ + vl / sizeof(TYPE), segment * NREG, \ + dstride * sizeof(ARMVectorReg), ISIZE, NREG); \ +} + +DO_LUT(2,1,b, uint8_t) +DO_LUT(2,1,h, uint16_t) +DO_LUT(2,1,s, uint32_t) +DO_LUT(2,2,b, uint8_t) +DO_LUT(2,2,h, uint16_t) +DO_LUT(2,2,s, uint32_t) +DO_LUT(2,4,b, uint8_t) +DO_LUT(2,4,h, uint16_t) +DO_LUT(2,4,s, uint32_t) + +DO_LUT(4,1,b, uint8_t) +DO_LUT(4,1,h, uint16_t) +DO_LUT(4,1,s, uint32_t) +DO_LUT(4,2,b, uint8_t) +DO_LUT(4,2,h, uint16_t) +DO_LUT(4,2,s, uint32_t) +DO_LUT(4,4,b, uint8_t) +DO_LUT(4,4,h, uint16_t) +DO_LUT(4,4,s, uint32_t) + +#undef DO_LUT +#undef DO_LUT_PRIM diff --git a/target/arm/tcg/sve_helper.c b/target/arm/tcg/sve_helper.c index e933372ba4..cd1dd22b3c 100644 --- a/target/arm/tcg/sve_helper.c +++ b/target/arm/tcg/sve_helper.c @@ -3035,21 +3035,6 @@ void HELPER(sve_rev_d)(void *vd, void *vn, uint32_t = desc) } } =20 -static uint64_t extractn(uint64_t *p, unsigned pos, unsigned len) -{ - uint64_t x; - - p +=3D pos / 64; - pos =3D pos % 64; - - x =3D p[0]; - if (pos + len > 64) { - x =3D (x >> pos) | (p[1] << (-pos & 63)); - pos =3D 0; - } - return extract64(x, pos, len); -} - static void depositn(uint64_t *p, unsigned pos, unsigned len, uint64_t val) { p +=3D pos / 64; diff --git a/target/arm/tcg/translate-sme.c b/target/arm/tcg/translate-sme.c index 4d82666d84..397e328a1b 100644 --- a/target/arm/tcg/translate-sme.c +++ b/target/arm/tcg/translate-sme.c @@ -1586,3 +1586,59 @@ static bool trans_SEL(DisasContext *s, arg_SEL *a) } return true; } + +static bool do_lut(DisasContext *s, arg_lut *a, + gen_helper_gvec_2_ptr *fn, int data) +{ + if (sme_sm_enabled_check(s) && sme2_zt0_enabled_check(s)) { + int svl =3D streaming_vec_reg_size(s); + tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, a->zd), + vec_full_reg_offset(s, a->zn), + tcg_env, svl, svl, data, fn); + } + return true; +} + +TRANS_FEAT(LUTI2_c_1b, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_1b, 0) +TRANS_FEAT(LUTI2_c_1h, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_1h, 0) +TRANS_FEAT(LUTI2_c_1s, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_1s, 0) + +TRANS_FEAT(LUTI2_c_2b, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_2b, 1) +TRANS_FEAT(LUTI2_c_2h, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_2h, 1) +TRANS_FEAT(LUTI2_c_2s, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_2s, 1) + +TRANS_FEAT(LUTI2_c_4b, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_4b, 1) +TRANS_FEAT(LUTI2_c_4h, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_4h, 1) +TRANS_FEAT(LUTI2_c_4s, aa64_sme2, do_lut, a, gen_helper_sme2_luti2_4s, 1) + +TRANS_FEAT(LUTI4_c_1b, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_1b, 0) +TRANS_FEAT(LUTI4_c_1h, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_1h, 0) +TRANS_FEAT(LUTI4_c_1s, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_1s, 0) + +TRANS_FEAT(LUTI4_c_2b, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_2b, 1) +TRANS_FEAT(LUTI4_c_2h, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_2h, 1) +TRANS_FEAT(LUTI4_c_2s, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_2s, 1) + +TRANS_FEAT(LUTI4_c_4h, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_4h, 1) +TRANS_FEAT(LUTI4_c_4s, aa64_sme2, do_lut, a, gen_helper_sme2_luti4_4s, 1) + +static bool do_lut_s4(DisasContext *s, arg_lut *a, gen_helper_gvec_2_ptr *= fn) +{ + return !(a->zd & 0b01100) && do_lut(s, a, fn, 4); +} + +static bool do_lut_s8(DisasContext *s, arg_lut *a, gen_helper_gvec_2_ptr *= fn) +{ + return !(a->zd & 0b01000) && do_lut(s, a, fn, 8); +} + +TRANS_FEAT(LUTI2_s_2b, aa64_sme2p1, do_lut_s8, a, gen_helper_sme2_luti2_2b) +TRANS_FEAT(LUTI2_s_2h, aa64_sme2p1, do_lut_s8, a, gen_helper_sme2_luti2_2h) + +TRANS_FEAT(LUTI2_s_4b, aa64_sme2p1, do_lut_s4, a, gen_helper_sme2_luti2_4b) +TRANS_FEAT(LUTI2_s_4h, aa64_sme2p1, do_lut_s4, a, gen_helper_sme2_luti2_4h) + +TRANS_FEAT(LUTI4_s_2b, aa64_sme2p1, do_lut_s8, a, gen_helper_sme2_luti4_2b) +TRANS_FEAT(LUTI4_s_2h, aa64_sme2p1, do_lut_s8, a, gen_helper_sme2_luti4_2h) + +TRANS_FEAT(LUTI4_s_4h, aa64_sme2p1, do_lut_s4, a, gen_helper_sme2_luti4_4h) diff --git a/target/arm/tcg/sme.decode b/target/arm/tcg/sme.decode index d0dce75a0d..9740d74410 100644 --- a/target/arm/tcg/sme.decode +++ b/target/arm/tcg/sme.decode @@ -908,3 +908,45 @@ ZERO_za 11000000 000011 110 .. 0000000000 00. = \ &zero_za ngrp=3D2 nvec=3D4 rv=3D%mova_rv off=3D%off1_x4 ZERO_za 11000000 000011 111 .. 0000000000 00. \ &zero_za ngrp=3D4 nvec=3D4 rv=3D%mova_rv off=3D%off1_x4 + +### SME Lookup Table Read + +&lut zd zn idx + +# LUTI2, consecutive +LUTI2_c_1b 1100 0000 1100 11 idx:4 00 00 zn:5 zd:5 &lut +LUTI2_c_1h 1100 0000 1100 11 idx:4 01 00 zn:5 zd:5 &lut +LUTI2_c_1s 1100 0000 1100 11 idx:4 10 00 zn:5 zd:5 &lut + +LUTI2_c_2b 1100 0000 1000 11 idx:3 1 00 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 +LUTI2_c_2h 1100 0000 1000 11 idx:3 1 01 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 +LUTI2_c_2s 1100 0000 1000 11 idx:3 1 10 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 + +LUTI2_c_4b 1100 0000 1000 11 idx:2 10 00 00 zn:5 ... 00 &lut zd=3D= %zd_ax4 +LUTI2_c_4h 1100 0000 1000 11 idx:2 10 01 00 zn:5 ... 00 &lut zd=3D= %zd_ax4 +LUTI2_c_4s 1100 0000 1000 11 idx:2 10 10 00 zn:5 ... 00 &lut zd=3D= %zd_ax4 + +# LUTI2, strided (must check zd alignment) +LUTI2_s_2b 1100 0000 1001 11 idx:3 1 00 00 zn:5 zd:5 &lut +LUTI2_s_2h 1100 0000 1001 11 idx:3 1 01 00 zn:5 zd:5 &lut + +LUTI2_s_4b 1100 0000 1001 11 idx:2 10 00 00 zn:5 zd:5 &lut +LUTI2_s_4h 1100 0000 1001 11 idx:2 10 01 00 zn:5 zd:5 &lut + +# LUTI4, consecutive +LUTI4_c_1b 1100 0000 1100 101 idx:3 00 00 zn:5 zd:5 &lut +LUTI4_c_1h 1100 0000 1100 101 idx:3 01 00 zn:5 zd:5 &lut +LUTI4_c_1s 1100 0000 1100 101 idx:3 10 00 zn:5 zd:5 &lut + +LUTI4_c_2b 1100 0000 1000 101 idx:2 1 00 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 +LUTI4_c_2h 1100 0000 1000 101 idx:2 1 01 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 +LUTI4_c_2s 1100 0000 1000 101 idx:2 1 10 00 zn:5 .... 0 &lut zd=3D= %zd_ax2 + +LUTI4_c_4h 1100 0000 1000 101 idx:1 10 01 00 zn:5 ... 00 &lut zd=3D= %zd_ax4 +LUTI4_c_4s 1100 0000 1000 101 idx:1 10 10 00 zn:5 ... 00 &lut zd=3D= %zd_ax4 + +# LUTI4, strided (must check zd alignment) +LUTI4_s_2b 1100 0000 1001 101 idx:2 1 00 00 zn:5 zd:5 &lut +LUTI4_s_2h 1100 0000 1001 101 idx:2 1 01 00 zn:5 zd:5 &lut + +LUTI4_s_4h 1100 0000 1001 101 idx:1 10 01 00 zn:5 zd:5 &lut --=20 2.43.0