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[97.113.13.231]) by smtp.gmail.com with ESMTPSA id h11sm10788508pfn.170.2019.05.17.11.20.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 17 May 2019 11:20:04 -0700 (PDT) To: David Hildenbrand , qemu-devel@nongnu.org References: <20190515203112.506-1-david@redhat.com> <20190515203112.506-5-david@redhat.com> From: Richard Henderson Openpgp: preference=signencrypt Message-ID: Date: Fri, 17 May 2019 11:20:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190515203112.506-5-david@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::544 Subject: Re: [Qemu-devel] [PATCH v1 4/5] s390x/tcg: Implement VECTOR ISOLATE STRING X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-s390x@nongnu.org, Cornelia Huck , Thomas Huth , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 5/15/19 1:31 PM, David Hildenbrand wrote: > +#define DEF_VISTR(BITS) \ > +static int vistr##BITS(void *v1, const void *v2) > +{ > + S390Vector tmp = {}; > + int i, cc = 3; > + > + for (i = 0; i < (128 / BITS); i++) { > + const uint##BITS##_t data = s390_vec_read_element##BITS(v2, i); > + > + if (!data) { > + cc = 0; > + break; > + } > + s390_vec_write_element##BITS(&tmp, i, data); > + } > + *(S390Vector *)v1 = tmp; > + return cc; > +} > +DEF_VISTR(8) > +DEF_VISTR(16) > +DEF_VISTR(32) Based on previous, this becomes cc = 3; a0 = s390_vec_read_element64(v2, 0); a1 = s390_vec_read_element64(v2, 1); z0 = zero_search(a0, m); if (z0) { i = clz64(z0); a0 &= ~(UINT64_MAX >> i); a1 = 0; cc = 0; } else { z1 = zero_search(a1, m); if (z1) { i = clz64(z1); a1 &= ~(UINT64_MAX >> i); cc = 0; } } s390_vec_write_element64(v1, 0, a0); s390_vec_write_element64(v1, 1, a1); return cc; r~