Arm Development Platforms forum Meaning of scratch register in ARM series

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Meaning of scratch register in ARM series

Lokeshwaran Rajendran over 5 years ago

Can I have the meaning of why r3,r4 registers are called scratch registers

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Ronan Synnott over 5 years ago +2 verified

Hello, I'm not sure which document you are referring to (as r4 is typically not a scratch register), but in the Arm Procedure call standard, r0-r3, and r12 are defined as scratch registers, meaning that...