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Fri, 04 Jul 2025 07:28:41 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, peter.maydell@linaro.org Subject: [PATCH v4 083/108] target/arm: Implement SME2 SEL Date: Fri, 4 Jul 2025 08:20:46 -0600 Message-ID: <20250704142112.1018902-84-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250704142112.1018902-1-richard.henderson@linaro.org> References: <20250704142112.1018902-1-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=2001:4860:4864:20::32; envelope-from=richard.henderson@linaro.org; helo=mail-oa1-x32.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: 2.1.29 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: 1751641013281116600 Content-Type: text/plain; charset="utf-8" Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson --- target/arm/tcg/helper-sme.h | 5 + target/arm/tcg/sme_helper.c | 317 +++++++++++++++++++++++++++++++++ target/arm/tcg/translate-sme.c | 31 ++++ target/arm/tcg/sme.decode | 9 + 4 files changed, 362 insertions(+) diff --git a/target/arm/tcg/helper-sme.h b/target/arm/tcg/helper-sme.h index 78ba3d1f20..467073ea25 100644 --- a/target/arm/tcg/helper-sme.h +++ b/target/arm/tcg/helper-sme.h @@ -313,3 +313,8 @@ DEF_HELPER_FLAGS_5(sme2_fclamp_h, TCG_CALL_NO_RWG, void= , 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_5(sme2_sel_b, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32, = i32) +DEF_HELPER_FLAGS_5(sme2_sel_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32, = i32) +DEF_HELPER_FLAGS_5(sme2_sel_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32, = i32) +DEF_HELPER_FLAGS_5(sme2_sel_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32, = i32) diff --git a/target/arm/tcg/sme_helper.c b/target/arm/tcg/sme_helper.c index 8a1f9fbf3d..c1166e4ffa 100644 --- a/target/arm/tcg/sme_helper.c +++ b/target/arm/tcg/sme_helper.c @@ -2118,3 +2118,320 @@ FCLAMP(sme2_fclamp_d, float64, H8) FCLAMP(sme2_bfclamp, bfloat16, H2) =20 #undef FCLAMP + +void HELPER(sme2_sel_b)(void *vd, void *vn, void *vm, + uint32_t png, uint32_t desc) +{ + int vl =3D simd_oprsz(desc); + int nreg =3D simd_data(desc); + int elements =3D vl / sizeof(uint8_t); + DecodeCounter p =3D decode_counter(png, vl, MO_8); + + if (p.lg2_stride =3D=3D 0) { + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint8_t *d =3D vd + r * sizeof(ARMVectorReg); + uint8_t *n =3D vn + r * sizeof(ARMVectorReg); + uint8_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, n, vl); /* all true */ + } else if (elements <=3D split) { + memcpy(d, m, vl); /* all false */ + } else { + for (int e =3D 0; e < split; e++) { + d[H1(e)] =3D m[H1(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H1(e)] =3D n[H1(e)]; + } + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint8_t *d =3D vd + r * sizeof(ARMVectorReg); + uint8_t *n =3D vn + r * sizeof(ARMVectorReg); + uint8_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, m, vl); /* all false */ + } else if (elements <=3D split) { + memcpy(d, n, vl); /* all true */ + } else { + for (int e =3D 0; e < split; e++) { + d[H1(e)] =3D n[H1(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H1(e)] =3D m[H1(e)]; + } + } + } + } + } else { + int estride =3D 1 << p.lg2_stride; + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint8_t *d =3D vd + r * sizeof(ARMVectorReg); + uint8_t *n =3D vn + r * sizeof(ARMVectorReg); + uint8_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e++) { + d[H1(e)] =3D m[H1(e)]; + } + for (; e < elements; e +=3D estride) { + d[H1(e)] =3D n[H1(e)]; + for (int i =3D 1; i < estride; i++) { + d[H1(e + i)] =3D m[H1(e + i)]; + } + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint8_t *d =3D vd + r * sizeof(ARMVectorReg); + uint8_t *n =3D vn + r * sizeof(ARMVectorReg); + uint8_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e +=3D estride) { + d[H1(e)] =3D n[H1(e)]; + for (int i =3D 1; i < estride; i++) { + d[H1(e + i)] =3D m[H1(e + i)]; + } + } + for (; e < elements; e++) { + d[H1(e)] =3D m[H1(e)]; + } + } + } + } +} + +void HELPER(sme2_sel_h)(void *vd, void *vn, void *vm, + uint32_t png, uint32_t desc) +{ + int vl =3D simd_oprsz(desc); + int nreg =3D simd_data(desc); + int elements =3D vl / sizeof(uint16_t); + DecodeCounter p =3D decode_counter(png, vl, MO_16); + + if (p.lg2_stride =3D=3D 0) { + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint16_t *d =3D vd + r * sizeof(ARMVectorReg); + uint16_t *n =3D vn + r * sizeof(ARMVectorReg); + uint16_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, n, vl); /* all true */ + } else if (elements <=3D split) { + memcpy(d, m, vl); /* all false */ + } else { + for (int e =3D 0; e < split; e++) { + d[H2(e)] =3D m[H2(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H2(e)] =3D n[H2(e)]; + } + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint16_t *d =3D vd + r * sizeof(ARMVectorReg); + uint16_t *n =3D vn + r * sizeof(ARMVectorReg); + uint16_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, m, vl); /* all false */ + } else if (elements <=3D split) { + memcpy(d, n, vl); /* all true */ + } else { + for (int e =3D 0; e < split; e++) { + d[H2(e)] =3D n[H2(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H2(e)] =3D m[H2(e)]; + } + } + } + } + } else { + int estride =3D 1 << p.lg2_stride; + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint16_t *d =3D vd + r * sizeof(ARMVectorReg); + uint16_t *n =3D vn + r * sizeof(ARMVectorReg); + uint16_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e++) { + d[H2(e)] =3D m[H2(e)]; + } + for (; e < elements; e +=3D estride) { + d[H2(e)] =3D n[H2(e)]; + for (int i =3D 1; i < estride; i++) { + d[H2(e + i)] =3D m[H2(e + i)]; + } + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint16_t *d =3D vd + r * sizeof(ARMVectorReg); + uint16_t *n =3D vn + r * sizeof(ARMVectorReg); + uint16_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e +=3D estride) { + d[H2(e)] =3D n[H2(e)]; + for (int i =3D 1; i < estride; i++) { + d[H2(e + i)] =3D m[H2(e + i)]; + } + } + for (; e < elements; e++) { + d[H2(e)] =3D m[H2(e)]; + } + } + } + } +} + +void HELPER(sme2_sel_s)(void *vd, void *vn, void *vm, + uint32_t png, uint32_t desc) +{ + int vl =3D simd_oprsz(desc); + int nreg =3D simd_data(desc); + int elements =3D vl / sizeof(uint32_t); + DecodeCounter p =3D decode_counter(png, vl, MO_32); + + if (p.lg2_stride =3D=3D 0) { + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint32_t *d =3D vd + r * sizeof(ARMVectorReg); + uint32_t *n =3D vn + r * sizeof(ARMVectorReg); + uint32_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, n, vl); /* all true */ + } else if (elements <=3D split) { + memcpy(d, m, vl); /* all false */ + } else { + for (int e =3D 0; e < split; e++) { + d[H4(e)] =3D m[H4(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H4(e)] =3D n[H4(e)]; + } + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint32_t *d =3D vd + r * sizeof(ARMVectorReg); + uint32_t *n =3D vn + r * sizeof(ARMVectorReg); + uint32_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, m, vl); /* all false */ + } else if (elements <=3D split) { + memcpy(d, n, vl); /* all true */ + } else { + for (int e =3D 0; e < split; e++) { + d[H4(e)] =3D n[H4(e)]; + } + for (int e =3D split; e < elements; e++) { + d[H4(e)] =3D m[H4(e)]; + } + } + } + } + } else { + /* p.esz must be MO_64, so stride must be 2. */ + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint32_t *d =3D vd + r * sizeof(ARMVectorReg); + uint32_t *n =3D vn + r * sizeof(ARMVectorReg); + uint32_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e++) { + d[H4(e)] =3D m[H4(e)]; + } + for (; e < elements; e +=3D 2) { + d[H4(e)] =3D n[H4(e)]; + d[H4(e + 1)] =3D m[H4(e + 1)]; + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint32_t *d =3D vd + r * sizeof(ARMVectorReg); + uint32_t *n =3D vn + r * sizeof(ARMVectorReg); + uint32_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + int e =3D 0; + + for (; e < MIN(split, elements); e +=3D 2) { + d[H4(e)] =3D n[H4(e)]; + d[H4(e + 1)] =3D m[H4(e + 1)]; + } + for (; e < elements; e++) { + d[H4(e)] =3D m[H4(e)]; + } + } + } + } +} + +void HELPER(sme2_sel_d)(void *vd, void *vn, void *vm, + uint32_t png, uint32_t desc) +{ + int vl =3D simd_oprsz(desc); + int nreg =3D simd_data(desc); + int elements =3D vl / sizeof(uint64_t); + DecodeCounter p =3D decode_counter(png, vl, MO_64); + + if (p.invert) { + for (int r =3D 0; r < nreg; r++) { + uint64_t *d =3D vd + r * sizeof(ARMVectorReg); + uint64_t *n =3D vn + r * sizeof(ARMVectorReg); + uint64_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, n, vl); /* all true */ + } else if (elements <=3D split) { + memcpy(d, m, vl); /* all false */ + } else { + memcpy(d, m, split * sizeof(uint64_t)); + memcpy(d + split, n + split, + (elements - split) * sizeof(uint64_t)); + } + } + } else { + for (int r =3D 0; r < nreg; r++) { + uint64_t *d =3D vd + r * sizeof(ARMVectorReg); + uint64_t *n =3D vn + r * sizeof(ARMVectorReg); + uint64_t *m =3D vm + r * sizeof(ARMVectorReg); + int split =3D p.count - r * elements; + + if (split <=3D 0) { + memcpy(d, m, vl); /* all false */ + } else if (elements <=3D split) { + memcpy(d, n, vl); /* all true */ + } else { + memcpy(d, n, split * sizeof(uint64_t)); + memcpy(d + split, m + split, + (elements - split) * sizeof(uint64_t)); + } + } + } +} diff --git a/target/arm/tcg/translate-sme.c b/target/arm/tcg/translate-sme.c index b6316ac716..7407597177 100644 --- a/target/arm/tcg/translate-sme.c +++ b/target/arm/tcg/translate-sme.c @@ -1642,3 +1642,34 @@ static gen_helper_gvec_3 * const uclamp_fns[] =3D { gen_helper_sme2_uclamp_d, }; TRANS(UCLAMP, do_clamp, a, uclamp_fns) + +static bool trans_SEL(DisasContext *s, arg_SEL *a) +{ + typedef void sme_sel_fn(TCGv_ptr, TCGv_ptr, TCGv_ptr, TCGv_i32, TCGv_i= 32); + static sme_sel_fn * const fns[4] =3D { + gen_helper_sme2_sel_b, gen_helper_sme2_sel_h, + gen_helper_sme2_sel_s, gen_helper_sme2_sel_d + }; + + if (!dc_isar_feature(aa64_sme2, s)) { + return false; + } + if (sme_sm_enabled_check(s)) { + int svl =3D streaming_vec_reg_size(s); + uint32_t desc =3D simd_desc(svl, svl, a->n); + TCGv_ptr t_d =3D tcg_temp_new_ptr(); + TCGv_ptr t_n =3D tcg_temp_new_ptr(); + TCGv_ptr t_m =3D tcg_temp_new_ptr(); + TCGv_i32 png =3D tcg_temp_new_i32(); + + tcg_gen_addi_ptr(t_d, tcg_env, vec_full_reg_offset(s, a->zd)); + tcg_gen_addi_ptr(t_n, tcg_env, vec_full_reg_offset(s, a->zn)); + tcg_gen_addi_ptr(t_m, tcg_env, vec_full_reg_offset(s, a->zm)); + + tcg_gen_ld16u_i32(png, tcg_env, pred_full_reg_offset(s, a->pg) + ^ (HOST_BIG_ENDIAN ? 6 : 0)); + + fns[a->esz](t_d, t_n, t_m, png, tcg_constant_i32(desc)); + } + return true; +} diff --git a/target/arm/tcg/sme.decode b/target/arm/tcg/sme.decode index c4b85a36d0..0a2ceea8be 100644 --- a/target/arm/tcg/sme.decode +++ b/target/arm/tcg/sme.decode @@ -878,6 +878,15 @@ UCLAMP 11000001 esz:2 1 zm:5 110001 zn:5 ....= 1 \ UCLAMP 11000001 esz:2 1 zm:5 110011 zn:5 ...0 1 \ &zzz_en zd=3D%zd_ax4 n=3D4 =20 +### SME2 Multi-vector SVE Select + +%sel_pg 10:3 !function=3Dplus_8 + +SEL 11000001 esz:2 1 ....0 100 ... ....0 ....0 \ + n=3D2 zd=3D%zd_ax2 zn=3D%zn_ax2 zm=3D%zm_ax2 pg=3D%sel_pg +SEL 11000001 esz:2 1 ...01 100 ... ...00 ...00 \ + n=3D4 zd=3D%zd_ax4 zn=3D%zn_ax4 zm=3D%zm_ax4 pg=3D%sel_pg + ### SME Multiple Zero =20 &zero_za rv off ngrp nvec --=20 2.43.0