[GitHub] [nuttx] pussuw commented on a diff in pull request #9103: arch/riscv: Fixed FPU register error

["pussuw (via GitHub)" <gi...@apache.org>]

pussuw commented on code in PR #9103:
URL: https://github.com/apache/nuttx/pull/9103#discussion_r1186509924


##########
arch/risc-v/src/common/riscv_macros.S:
##########
@@ -227,8 +222,15 @@
   REGLOAD      t0, REG_INT_CTX(\out)
   li           t1, MSTATUS_FS
   and          t2, t0, t1
-  li           t1, MSTATUS_FS_INIT
-  ble          t2, t1, 1f
+  li           t1, MSTATUS_FS_DIRTY
+  bne          t2, t1, 1f
+
+  /* Reset FS bit to MSTATUS_FS_CLEAN */
+  li           t1, MSTATUS_FS_CLEAN

Review Comment:
   Would it be possible to save FPU registers into the tcb again and save/restore FPU state only when a switch out/in happens?



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