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From: | Richard Henderson |
Subject: | Re: [PATCH 08/33] target/ppc: Implement cnttzdm |
Date: | Fri, 22 Oct 2021 16:55:56 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 |
On 10/21/21 12:45 PM, matheus.ferst@eldorado.org.br wrote:
+uint64_t helper_CNTTZDM(uint64_t src, uint64_t mask) +{ + uint64_t count = 0; + + while (mask != 0) { + if ((src >> ctz64(mask)) & 1) { + break; + } + + count++; + mask &= mask - 1; + } + + return count; +}
Similar to cntlzdm, we can use src & mask. r~
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