2023-02-04 16:18:55 +00:00
|
|
|
// debug.S
|
|
|
|
|
// David_Harris@hmc.edu 4 February 2023
|
|
|
|
|
// Small code snippets for the purpose of debugging issues
|
|
|
|
|
// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
|
|
|
|
|
|
|
|
|
|
# openhwgroup/cvw Issue #55
|
|
|
|
|
li x1, 0x7ff0000000000001
|
|
|
|
|
fmv.w.x f4, x1
|
2023-02-04 16:31:47 +00:00
|
|
|
li x1, 0x7ff8000000000000
|
2023-02-04 16:18:55 +00:00
|
|
|
fmv.w.x f9, x1
|
|
|
|
|
fsgnjx.s f12,f9,f4 # expected f 0xffffffff7fc00000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#########################
|
|
|
|
|
# HTIF and signature
|
|
|
|
|
#########################
|
|
|
|
|
|
|
|
|
|
write_tohost:
|
|
|
|
|
la t1, tohost
|
|
|
|
|
li t0, 1 # 1 for success, 3 for failure
|
|
|
|
|
sd t0, 0(t1) # send success code
|
|
|
|
|
|
|
|
|
|
self_loop:
|
|
|
|
|
j self_loop # wait
|
|
|
|
|
|
|
|
|
|
.section .tohost
|
|
|
|
|
tohost: # write to HTIF
|
|
|
|
|
.dword 0
|
|
|
|
|
fromhost:
|
|
|
|
|
.dword 0
|
|
|
|
|
|
|
|
|
|
.data
|
|
|
|
|
|
|
|
|
|
.EQU XLEN,64
|
|
|
|
|
begin_signature:
|
|
|
|
|
.fill 2*(XLEN/32),4,0xdeadbeef #
|
|
|
|
|
end_signature:
|
|
|
|
|
|
|
|
|
|
# Initialize stack with room for 512 bytes
|
|
|
|
|
.bss
|
|
|
|
|
.space 512
|
|
|
|
|
topofstack:
|
