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Fri, 26 Aug 2022 16:12:45 -0700 (PDT) X-Google-Smtp-Source: AA6agR4wHj2yZz1mGMc9JuOBJVgaz1FYoWHeQYuwR5lH5TGorYOg05UsFBGeMtqfMKjdcfHlVbCb0A== X-Received: by 2002:a17:907:6eaa:b0:741:44e3:d9e4 with SMTP id sh42-20020a1709076eaa00b0074144e3d9e4mr636996ejc.424.1661555565527; Fri, 26 Aug 2022 16:12:45 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, paul@nowt.org Subject: [PATCH 18/23] i386: Dot product AVX helper prep Date: Sat, 27 Aug 2022 01:11:59 +0200 Message-Id: <20220826231204.201395-19-pbonzini@redhat.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220826231204.201395-1-pbonzini@redhat.com> References: <20220826231204.201395-1-pbonzini@redhat.com> 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=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.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, DKIMWL_WL_HIGH=-0.001, 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=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" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1661557082745100001 Content-Type: text/plain; charset="utf-8" From: Paul Brook Make the dpps and dppd helpers AVX-ready I can't see any obvious reason why dppd shouldn't work on 256 bit ymm registers, but both AMD and Intel agree that it's xmm only. Signed-off-by: Paul Brook Message-Id: <20220424220204.2493824-17-paul@nowt.org> Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini --- target/i386/ops_sse.h | 80 ++++++++++++++++++++++++------------------- 1 file changed, 45 insertions(+), 35 deletions(-) diff --git a/target/i386/ops_sse.h b/target/i386/ops_sse.h index f0bb30ba53..17d04888c5 100644 --- a/target/i386/ops_sse.h +++ b/target/i386/ops_sse.h @@ -1925,55 +1925,64 @@ SSE_HELPER_I(helper_blendps, L, 4, FBLENDP) SSE_HELPER_I(helper_blendpd, Q, 2, FBLENDP) SSE_HELPER_I(helper_pblendw, W, 8, FBLENDP) =20 -void glue(helper_dpps, SUFFIX)(CPUX86State *env, Reg *d, Reg *s, uint32_t = mask) +void glue(helper_dpps, SUFFIX)(CPUX86State *env, Reg *d, Reg *s, + uint32_t mask) { + Reg *v =3D d; float32 prod1, prod2, temp2, temp3, temp4; + int i; =20 - /* - * We must evaluate (A+B)+(C+D), not ((A+B)+C)+D - * to correctly round the intermediate results - */ - if (mask & (1 << 4)) { - prod1 =3D float32_mul(d->ZMM_S(0), s->ZMM_S(0), &env->sse_status); - } else { - prod1 =3D float32_zero; - } - if (mask & (1 << 5)) { - prod2 =3D float32_mul(d->ZMM_S(1), s->ZMM_S(1), &env->sse_status); - } else { - prod2 =3D float32_zero; - } - temp2 =3D float32_add(prod1, prod2, &env->sse_status); - if (mask & (1 << 6)) { - prod1 =3D float32_mul(d->ZMM_S(2), s->ZMM_S(2), &env->sse_status); - } else { - prod1 =3D float32_zero; - } - if (mask & (1 << 7)) { - prod2 =3D float32_mul(d->ZMM_S(3), s->ZMM_S(3), &env->sse_status); - } else { - prod2 =3D float32_zero; - } - temp3 =3D float32_add(prod1, prod2, &env->sse_status); - temp4 =3D float32_add(temp2, temp3, &env->sse_status); + for (i =3D 0; i < 2 << SHIFT; i +=3D 4) { + /* + * We must evaluate (A+B)+(C+D), not ((A+B)+C)+D + * to correctly round the intermediate results + */ + if (mask & (1 << 4)) { + prod1 =3D float32_mul(v->ZMM_S(i), s->ZMM_S(i), &env->sse_stat= us); + } else { + prod1 =3D float32_zero; + } + if (mask & (1 << 5)) { + prod2 =3D float32_mul(v->ZMM_S(i+1), s->ZMM_S(i+1), &env->sse_= status); + } else { + prod2 =3D float32_zero; + } + temp2 =3D float32_add(prod1, prod2, &env->sse_status); + if (mask & (1 << 6)) { + prod1 =3D float32_mul(v->ZMM_S(i+2), s->ZMM_S(i+2), &env->sse_= status); + } else { + prod1 =3D float32_zero; + } + if (mask & (1 << 7)) { + prod2 =3D float32_mul(v->ZMM_S(i+3), s->ZMM_S(i+3), &env->sse_= status); + } else { + prod2 =3D float32_zero; + } + temp3 =3D float32_add(prod1, prod2, &env->sse_status); + temp4 =3D float32_add(temp2, temp3, &env->sse_status); =20 - d->ZMM_S(0) =3D (mask & (1 << 0)) ? temp4 : float32_zero; - d->ZMM_S(1) =3D (mask & (1 << 1)) ? temp4 : float32_zero; - d->ZMM_S(2) =3D (mask & (1 << 2)) ? temp4 : float32_zero; - d->ZMM_S(3) =3D (mask & (1 << 3)) ? temp4 : float32_zero; + d->ZMM_S(i) =3D (mask & (1 << 0)) ? temp4 : float32_zero; + d->ZMM_S(i+1) =3D (mask & (1 << 1)) ? temp4 : float32_zero; + d->ZMM_S(i+2) =3D (mask & (1 << 2)) ? temp4 : float32_zero; + d->ZMM_S(i+3) =3D (mask & (1 << 3)) ? temp4 : float32_zero; + } } =20 -void glue(helper_dppd, SUFFIX)(CPUX86State *env, Reg *d, Reg *s, uint32_t = mask) +#if SHIFT =3D=3D 1 +/* Oddly, there is no ymm version of dppd */ +void glue(helper_dppd, SUFFIX)(CPUX86State *env, + Reg *d, Reg *s, uint32_t mask) { + Reg *v =3D d; float64 prod1, prod2, temp2; =20 if (mask & (1 << 4)) { - prod1 =3D float64_mul(d->ZMM_D(0), s->ZMM_D(0), &env->sse_status); + prod1 =3D float64_mul(v->ZMM_D(0), s->ZMM_D(0), &env->sse_status); } else { prod1 =3D float64_zero; } if (mask & (1 << 5)) { - prod2 =3D float64_mul(d->ZMM_D(1), s->ZMM_D(1), &env->sse_status); + prod2 =3D float64_mul(v->ZMM_D(1), s->ZMM_D(1), &env->sse_status); } else { prod2 =3D float64_zero; } @@ -1981,6 +1990,7 @@ void glue(helper_dppd, SUFFIX)(CPUX86State *env, Reg = *d, Reg *s, uint32_t mask) d->ZMM_D(0) =3D (mask & (1 << 0)) ? temp2 : float64_zero; d->ZMM_D(1) =3D (mask & (1 << 1)) ? temp2 : float64_zero; } +#endif =20 void glue(helper_mpsadbw, SUFFIX)(CPUX86State *env, Reg *d, Reg *s, uint32_t offset) --=20 2.37.1