diff options
Diffstat (limited to 'examples/ex.subv')
| -rw-r--r-- | examples/ex.subv | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/examples/ex.subv b/examples/ex.subv index a65643e..0c24a98 100644 --- a/examples/ex.subv +++ b/examples/ex.subv @@ -1,16 +1,47 @@ == code 0x80400000 # repeatedly print "Hi\n" main: - # load 0x10000000 (UART0) into t0 - 37/lui 5/rd/t0 10000/imm20 - # store 0x48 (H) in UART0+0 + 13/opi 5/rd/t0 0/subop/add 0/rs/x0 0/imm12 + + 37/lui 5/rd/t0 10/imm20 + 13/opi 6/rd/t1 0/subop/add 0/rs/x0 aa/imm12 + 23/store 2/width/word 5/rs/t0 0/off12 6/rs/t1 + + # load 0x20000 (UART) into t0 + 37/lui 5/rd/t0 20/imm20 + # set UART_BAUD (UART+0) to 1666 (0x682) + 13/opi 6/rd/t1 0/subop/add 0/rs/x0 682/imm12 + 23/store 2/width/word 5/rs/t0 0/off12 6/rs/t1 + +spin:a: + # spin if FIFO is full (UART+4 < 0) + 03/load 7/rd/t2 2/width/w 5/rs/t0 4/imm12 + 13/opi 7/rd/t2 7/subop/and 7/rs/t2 1/imm12 + 63/branch 0/subop/== 7/rs/t2 0/rs/x0 spin:a/off13 + + # store 0x48 (H) in UART+8 13/opi 0/subop/add 6/rd/t1 0/rs/x0 48/imm12 - 23/store 0/width/byte 5/rs/t0 0/off12 6/rs/t1 - # store 0x69 (i) in UART0+0 + 23/store 2/width/word 5/rs/t0 8/off12 6/rs/t1 + +spin:b: + # spin if FIFO is full (UART+4 < 0) + 03/load 7/rd/t2 2/width/w 5/rs/t0 4/imm12 + 13/opi 7/rd/t2 7/subop/and 7/rs/t2 1/imm12 + 63/branch 0/subop/== 7/rs/t2 0/rs/x0 spin:b/off13 + + # store 0x69 (i) in UART+8 13/opi 0/subop/add 6/rd/t1 0/rs/x0 69/imm12 - 23/store 0/width/byte 5/rs/t0 0/off12 6/rs/t1 - # store 0x0a (\n) in UART0+0 + 23/store 2/width/word 5/rs/t0 8/off12 6/rs/t1 + +spin:c: + # spin if FIFO is full (UART+4 < 0) + 03/load 7/rd/t2 2/width/w 5/rs/t0 4/imm12 + 13/opi 7/rd/t2 7/subop/and 7/rs/t2 1/imm12 + 63/branch 0/subop/== 7/rs/t2 0/rs/x0 spin:c/off13 + + # store 0x0a (\n) in UART+8 13/opi 0/subop/add 6/rd/t1 0/rs/x0 0a/imm12 - 23/store 0/width/byte 5/rs/t0 0/off12 6/rs/t1 + 23/store 2/width/word 5/rs/t0 8/off12 6/rs/t1 + # jump back up to the top 6f/jal 0/rd/x0 main/off21 |