xtheadmac.adoc

Multiply-accumulate instructions (XTheadMac)

Frozen

The XTheadMac extension is stable.

The XTheadMac ISA extension provides multiply-accumulate instructions.

Extension version: 1.0.

The table below gives an overview of the instructions:

RV32	RV64	Mnemonic	Instruction
Y	Y	th.mula rd, rs1, rs2	[xtheadmac-insns-mula]
Y	Y	th.mulah rd, rs1, rs2	[xtheadmac-insns-mulah]
N	Y	th.mulaw rd, rs1, rs2	[xtheadmac-insns-mulaw]
Y	Y	th.muls rd, rs1, rs2	[xtheadmac-insns-muls]
Y	Y	th.mulsh rd, rs1, rs2	[xtheadmac-insns-mulsh]
Y	Y	th.mulsw rd, rs1, rs2	[xtheadmac-insns-mulsw]

Availability

The XTheadMac extension’s availability can be probed via the th.sxstatus.THEADISAEE bit (bit 22). The XTheadMac extension is available if and only if this bit is 1. Refer to [xtheadsxstatus] for more information about the th.sxstatus CSR.

Instructions

xtheadmac/mula.adoc <<< xtheadmac/mulah.adoc <<< xtheadmac/mulaw.adoc <<< xtheadmac/muls.adoc <<< xtheadmac/mulsh.adoc <<< xtheadmac/mulsw.adoc