asm volatile ("movfcsr2gr $t0, $fcsr0" ::: "$t0");
asm volatile ("st.d $t0, %0" :"=m"(restore_fcsr));
generate to the following instructions with -Og flag:
movfcsr2gr $t0, $zero
addi.d $t0, $sp, 2047(0x7ff)
addi.d $t0, $t0, 77(0x4d)
st.w $t0, $t0, 0
fcsr0 register and restore_fcsr variable are both stored in t0 register.
Change to:
asm volatile ("movfcsr2gr %0, $fcsr0" :"=r"(restore_fcsr));
to avoid restore_fcsr address in t0.
Comparing float value using memcmp because float value cannot be
directly compared for equality.
Put LOAD_REGISTER_FCSR and SAVE_REGISTER_FCC after LOAD_REGISTER_FLOAT.
Some float instructions may change fcsr register.
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