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UM0434 Datasheet(PDF) 220 Page - STMicroelectronics |
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UM0434 Datasheet(HTML) 220 Page - STMicroelectronics |
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220 / 390 page  UM0434 Instruction pipeline and execution timing 221/391 Instruction class cycle counts Class of instructions Latency Throughput Special notes Integer: add, sub, shift, rotate, logical, cntlzw 11 Integer: compare 1 1 Branch 2/1 2/1 Branches take between 1 and 2 cycles to execute. Multiply 1 1 Divide 6–16 6–16 Data dependent timing CR logical 1 1 Loads (non-multiple) 1 1 Load multiple 1 + n/2 (max) 1 + n/2 (max) Timing depends on n and address alignment. Stores (non-multiple) 1 1 Store multiple 1 + n/2 (max) 1 + n/2 (max) Timing depends on n and address alignment. mtmsr, wrtee, wrteei 2& 2 mcrf 11 mfspr, mtspr 2& 2& Applies to debug SPRs, optional unit SPRs mfspr, mfmsr 1 1 Applies to internal, non-debug SPRs mfcr, mtcr 11 rfi, rfci, rfdi 3- sc 3- tw, twi 3 - Trap taken timing |
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