From 697fadd2946dafaf84bc70413ba26116e872bc5f Mon Sep 17 00:00:00 2001 From: Scott Johnson Date: Tue, 6 Dec 2016 11:00:55 -0800 Subject: Enable FPU in MSTATUS CSR during init This way, chips with FPU can run FPU instructions without taking exceptions. I've confirmed that dhrystone still runs successfully even on chips with no FPU. --- bsp/env/freedom-e300-hifive1/init.c | 1 + 1 file changed, 1 insertion(+) diff --git a/bsp/env/freedom-e300-hifive1/init.c b/bsp/env/freedom-e300-hifive1/init.c index d085f6c..be76f90 100644 --- a/bsp/env/freedom-e300-hifive1/init.c +++ b/bsp/env/freedom-e300-hifive1/init.c @@ -182,6 +182,7 @@ void _init() printf("core freq at %d Hz\n", get_cpu_freq()); write_csr(mtvec, &handle_trap); + write_csr(mstatus, MSTATUS_FS); // enable FPU _exit(main(0, NULL)); } -- cgit v1.2.3