vcsr :: RISC-V Specification for example_rv64_with

Attributes

CSR Address	0xf
Defining extension	V
Length	64-bit
Privilege Mode	U

CSR Address

0xf

Defining extension

V

Length

64-bit

Privilege Mode

U

Format

Figure 1. vcsr format

Field Summary

Name Location Type Reset Value

Name	Location	Type	Reset Value
`VXRM`	2:1	RW-RH	UNDEFINED_LEGAL
`VXSAT`	0	RW-RH	UNDEFINED_LEGAL

VXRM

2:1

RW-RH

UNDEFINED_LEGAL

VXSAT

0

RW-RH

UNDEFINED_LEGAL

Fields

`VXRM`

Location: vcsr[2:1]
Description: See vxrm.
Type

RW-RH

Read-Write Restricted with Hardware update

Field is writable by software. Only certain values are legal. Writing an illegal value into the field is ignored, such that the field retains its prior state. Hardware also updates the field without an explicit software write.)

Reset value

UNDEFINED_LEGAL

Software write

This field has special behavior when written by software (e.g., through csrrw).

When software tries to write csr_value, the field will be written with the return value of the function below.

CSR[vxrm].VALUE = csr_value.VXRM;
return csr_value.VXRM;

`VXSAT`

Location: vcsr[0]
Description: See vxsat.
Type

RW-RH

Read-Write Restricted with Hardware update

Field is writable by software. Only certain values are legal. Writing an illegal value into the field is ignored, such that the field retains its prior state. Hardware also updates the field without an explicit software write.)

Reset value

UNDEFINED_LEGAL

Software write

This field has special behavior when written by software (e.g., through csrrw).

When software tries to write csr_value, the field will be written with the return value of the function below.

CSR[vxsat].VALUE = csr_value.VXSAT;
return csr_value.VXSAT;