Mirrors_Framework/nuttx
1
0
Fork 0
mirror of https://github.com/apache/nuttx.git synced 2026-05-31 23:40:19 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

riscv/riscv_fpu: Clear the full FPU status/control register on boot

Browse Source 
Instead of clearing the fields individually, just wipe the whole register.
This can be done because flags and rm are just parts of the fcsr.

31             8        5           0
+--------------+--------+-----------+
|              |        |           |
|   RESERVED   |  FRM   |  FSTATUS  |
|              |        |           |
+--------------+--------+-----------+
                FCSR
This commit is contained in:
Ville Juven
2023-07-27 11:05:19 +03:00
committed by Xiang Xiao
parent b409d72e9d
commit 0ea9debfce
1 changed files with 1 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/risc-v/src/common/riscv_fpu.S
+1 -2
View File
@@ -69,8 +69,7 @@ riscv_fpuconfig:
li a0, MSTATUS_FS_INIT li a0, MSTATUS_FS_INIT
csrs CSR_STATUS, a0 csrs CSR_STATUS, a0
fsflags zero fscsr zero
fsrm zero
fence.i fence.i
ret ret