zstd: asm decode - use SSE instruction #544
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Benchmarks from an Ice Lake machine: Benchmark_seqdec_decodeNoBMI/n-12286-lits-13914-prev-9869-1990358-3296656-win-4194304.blk-16 128501 125128 -2.62% Benchmark_seqdec_decodeNoBMI/n-12485-lits-6960-prev-976039-2250252-2463561-win-4194304.blk-16 134702 130647 -3.01% Benchmark_seqdec_decodeNoBMI/n-14746-lits-14461-prev-209-8-1379909-win-4194304.blk-16 120971 119333 -1.35% Benchmark_seqdec_decodeNoBMI/n-1525-lits-1498-prev-2009476-797934-2994405-win-4194304.blk-16 12804 12794 -0.08% Benchmark_seqdec_decodeNoBMI/n-3478-lits-3628-prev-895243-2104056-2119329-win-4194304.blk-16 29078 28750 -1.13% Benchmark_seqdec_decodeNoBMI/n-8422-lits-5840-prev-168095-2298675-433830-win-4194304.blk-16 83494 83368 -0.15% Benchmark_seqdec_decodeNoBMI/n-1000-lits-1057-prev-21887-92-217-win-8388608.blk-16 8079 7952 -1.57% Benchmark_seqdec_decodeNoBMI/n-15134-lits-20798-prev-4882976-4884216-4474622-win-8388608.blk-16 164592 162022 -1.56% Benchmark_seqdec_decodeNoBMI/n-2-lits-0-prev-620601-689171-848-win-8388608.blk-16 52.4 52.7 +0.63% Benchmark_seqdec_decodeNoBMI/n-90-lits-67-prev-19498-23-19710-win-8388608.blk-16 791 789 -0.21% Benchmark_seqdec_decodeNoBMI/n-931-lits-1179-prev-36502-1526-1518-win-8388608.blk-16 7793 7782 -0.14% Benchmark_seqdec_decodeNoBMI/n-2898-lits-4062-prev-335-386-751-win-8388608.blk-16 23069 22699 -1.60% Benchmark_seqdec_decodeNoBMI/n-4056-lits-12419-prev-10792-66-309849-win-8388608.blk-16 32626 32118 -1.56% Benchmark_seqdec_decodeNoBMI/n-8028-lits-4568-prev-917-65-920-win-8388608.blk-16 75567 75241 -0.43% Benchmark_seqdec_decode/n-12286-lits-13914-prev-9869-1990358-3296656-win-4194304.blk-16 111331 108619 -2.44% Benchmark_seqdec_decode/n-12485-lits-6960-prev-976039-2250252-2463561-win-4194304.blk-16 114481 111280 -2.80% Benchmark_seqdec_decode/n-14746-lits-14461-prev-209-8-1379909-win-4194304.blk-16 108650 105387 -3.00% Benchmark_seqdec_decode/n-1525-lits-1498-prev-2009476-797934-2994405-win-4194304.blk-16 11454 11091 -3.17% Benchmark_seqdec_decode/n-3478-lits-3628-prev-895243-2104056-2119329-win-4194304.blk-16 26245 25501 -2.83% Benchmark_seqdec_decode/n-8422-lits-5840-prev-168095-2298675-433830-win-4194304.blk-16 71110 69874 -1.74% Benchmark_seqdec_decode/n-1000-lits-1057-prev-21887-92-217-win-8388608.blk-16 7320 7221 -1.35% Benchmark_seqdec_decode/n-15134-lits-20798-prev-4882976-4884216-4474622-win-8388608.blk-16 131987 130904 -0.82% Benchmark_seqdec_decode/n-2-lits-0-prev-620601-689171-848-win-8388608.blk-16 49.5 49.8 +0.63% Benchmark_seqdec_decode/n-90-lits-67-prev-19498-23-19710-win-8388608.blk-16 701 696 -0.74% Benchmark_seqdec_decode/n-931-lits-1179-prev-36502-1526-1518-win-8388608.blk-16 6886 6828 -0.84% Benchmark_seqdec_decode/n-2898-lits-4062-prev-335-386-751-win-8388608.blk-16 21162 20897 -1.25% Benchmark_seqdec_decode/n-4056-lits-12419-prev-10792-66-309849-win-8388608.blk-16 29856 29612 -0.82% Benchmark_seqdec_decode/n-8028-lits-4568-prev-917-65-920-win-8388608.blk-16 64311 63216 -1.70%
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Part of task #515.
Benchmarks from an Ice Lake machine. It's a bit better.