Semiconductor integrated circuit and compiler

摘要

A semiconductor integrated circuit includes: a floating point arithmetic unit that includes circuit resources over which power saving control is performed, and executes a floating point arithmetic operation; a power-control instruction control unit that receives a pre-access instruction corresponding to a floating point arithmetic operation instruction, and invalidates stepwise the power saving control over the circuit resources included in the floating point arithmetic unit to operate a part of the circuit resources in the floating point arithmetic unit; and a control unit that causes the floating point arithmetic unit to execute the floating point arithmetic operation, wherein before execution of the floating point arithmetic operation in the floating point arithmetic unit, power consumption is previously increased by the pre-access instruction.

主权项

1. A semiconductor integrated circuit, comprising:
an arithmetic unit that executes processing according to an instruction and includes a plurality of circuit resources over which power saving control relating to reduction in power consumption is performed; a first control unit that receives a second instruction executed prior to execution of a first instruction, the second instruction being corresponding to the first instruction for which processing is executed using the circuit resources of the arithmetic unit, and operates a part of the circuit resources to be used in the processing according to the first instruction when the second instruction is received; and a second control unit that receives the first instruction and causes the arithmetic unit to execute the processing according to the first instruction.