github-mirrors/cva6
1
0
Fork 0
mirror of https://github.com/openhwgroup/cva6.git synced 2025-04-22 05:07:21 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 5

CVXIF : Fix cus_exc format & invalid values

Browse source
This commit is contained in:
Ayoub Jalali 2023-08-04 16:42:49 +02:00
parent a977cc0629
commit a23d10f294
1 changed files with 3 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

6
cva6/env/uvme/cvxif_vseq/custom_instruction.rst vendored
View file

@ -87,14 +87,14 @@ All instructions use opcode `CUSTOM_3`(0x7b, 0b111_1011).
- **CUS_EXC**: Custom Exception
**Format**: cus_exc rd, rs1, rs2 -> |1100000|rs2|rs1|010|rd|111_1011|
**Format**: cus_exc rs1 -> |1100000|00000|rs1|010|00000|111_1011|
**Description**: raise an exception.
**Pseudocode**: mcause[5:0] = rs1
**Invalid values**: rd = 0x0 & rs2 = 0x0
**Invalid values**: NONE
**Exception raised**: raise an exception based on the rs1 register address,also raised an illegal instruction exception if rd != 0x0 or rs2 != 0x0
**Exception raised**: raise an exception based on the rs1 register address.
When a CV-X-IF exception is raised, mcause[5:0] of the corresponding CORE-V hart is assumed set to exccode[5:0] of CV-X-IF.