AC_Problemas_Hoja3_Soluc_10

25ns pipesldst2 avmips2 lva ldst1 12 1 vmips2tc 1ns

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Unformatted text preview: = 3 / 2,92 1,25x10‐3 MFLOPS = 822 MFLOPS Problema 10 VMIPS: tc = 1.25 ns Pipes LD/ST:2 a) VMIPS2 LV A LD/ST 1 12 *1 VMIPS2: tc = 1 ns Pipes LD/ST:2 ; Pipes +: 2(8 etapas); Pipes *: 2 (10 etapas); Tloop = 45 ciclos MULVS (x*A) 64 10 *2 MULVS (y*A) 64 10 + ADDVV 8 SV A LD/ST 2 64 12 0 12 13 23 31 107 43 Tchime = 1; Tstart = 107 – 64 = 43 (Nota.‐ Tb es igual a 12+1+10+8+12); Tloop= 45 Cuando n ∞: Tn = (n/64) (45+43) + 1n = 2,37n ciclos R∞ (VMIPS2) = (Nº op PF) / (2,37 n) FLOP/ciclo = 3 / 2,37 FLOP/ciclo Pasamos a MFLOPS: R∞ (VMIPS2) = 3 / 2,37 1x10‐9 FLOP/s = 3 / 2,37 1x10‐3 R∞ (VM...
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