AC_Problemas_Hoja3_Soluc_10 - Problema10 VMIPS:tc =1.25ns...

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Problema 10 VMIPS: tc = 1.25 ns Pipes LD/ST:2 VMIPS2: tc = 1 ns Pipes LD/ST:2 ; Pipes +: 2(8 etapas); Pipes *: 2 (10 etapas); T loop = 45 ciclos a) VMIPS LV A MULVS (x*A) MULVS (y*A) ADDVV SV A 12 64 7 12 7 6 0 12 19 83 64 90 96 108 172 LD/ST * + T chime = 2; T start = 172 – (2x64) = 44 (Nota. Tb es igual a 12+7+7+6+12); T loop =15 Cuando n Æ : Tn = (n/64) (15+44) + 2n = 2,92n ciclos R (VMIPS) = (Nº op PF) / (2,92 n) FLOP/ciclo = 3 / 2,92 FLOP/ciclo Pasamos a MFLOPS: R (VMIPS) = 3 / 2,92 1,25x10 9 FLOP/s = 3 / 2,92 1,25x10 3 MFLOPS = 822 MFLOPS
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Problema 10 VMIPS: tc = 1.25 ns Pipes LD/ST:2 VMIPS2: tc = 1 ns Pipes LD/ST:2 ; Pipes +: 2(8 etapas); Pipes *: 2 (10 etapas); T loop = 45 ciclos a) VMIPS2 LV A MULVS (x*A) ADDVV SV A 12 10 12 8 0 12 23 31 64 43 107 LD/ST 1 * 1 + T chime = 1; T start = 107 – 64 = 43 (Nota. Tb es igual a 12+1+10+8+12); T loop = 45 Cuando n Æ : Tn = (n/64) (45+43) + 1n = 2,37n ciclos R (VMIPS2) = (Nº op PF) / (2,37 n) FLOP/ciclo = 3 / 2,37 FLOP/ciclo
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