fscsr
Swap FP CSR
Swaps t2 into the FP control and status register, storing its old value in t1, or only writes t1 when given one register.
Also written as: fssr
Forms
-
Write FP control/status register
Operands
t1- Any integer register,
x0tox31, or its named alias, such aszero,t0ort6. t2- An integer register. It may be the same register as
t1.
# Initialize fcsr, then use fscsr to read its old value or update it.
.text
li t3, 0
csrw t3, fcsr
li t0, 1
fscsr t1, t0
# t1=0 is the old value; fcsr becomes 1.