RISC-V ISA Explorer · Compressed (Zc*)

Zcmp: Push/Pop & Reg Save/Restore

Ratified 2023-04 · version 1.0.0

Single instructions that push or pop a list of saved registers, collapsing prologues and epilogues.

Typical use: Stack push/pop, frame save

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Dependencies

Requires

Zca

Incompatible with

Zcd

Required by

Zce

Instructions (6)

Mnemonic	Name	Encoding	Match	Mask
`CM.MVA01S`	Move two s0-s7 registers into a0-a1	`----------------101011---11---10`	`0xac62`	`0xfc63`
`CM.MVSA01`	Move a0-a1 into two registers of s0-s7	`----------------101011---01---10`	`0xac22`	`0xfc63`
`CM.POP`	Destroy function call stack frame	`----------------10111010------10`	`0xba02`	`0xff03`
`CM.POPRET`	Destroy function call stack frame and return to `ra`	`----------------10111110------10`	`0xbe02`	`0xff03`
`CM.POPRETZ`	Destroy function call stack frame, move zero to `a0` and return to `ra`	`----------------10111100------10`	`0xbc02`	`0xff03`
`CM.PUSH`	Create function call stack frame	`----------------10111000------10`	`0xb802`	`0xff03`