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coredefs.S
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# Copyright Adrian McMenamin, 2021 - 2023
# Resuse licensed under version 2 of the GNU GPL
# Mostly words from the Forth standard core not defined somewhere else
# Also terminal io
CODEHEADER _ABORTCOMM, ALLOCATE, 0x0
#(ba -- b)
#compiled ABORTCOMM
ld t0, 0(sp)
addi sp, sp, 8
bnez t0, abortcomm_abort
ld t0, 0(s7)
li t1, 7
and t2, t0, t1
beqz t2, abort_advance
li t3, 8
sub t4, t3, t2
add t0, t0, t4
abort_advance:
addi s7, s7, 8
add s7, s7, t0
tail NEXT
abortcomm_abort:
ld a0, 0(s7)
mv a1, s7
add s7, s7, a0
li t0, 7
and t1, s7, t0
beqz t1, abortcomm_compiled_readyoutput
li t2, 8
sub t2, t2, t1
add s7, s7, t2
abortcomm_compiled_readyoutput:
addi s7, s7, 8
addi a1, a1, 8
mv a2, a0
li a0, 1
li a7, 64
ecall #make system call
WRITECR
la s7, outer_loop_ok
la t0, CREATEFLAG
sd zero, 0(t0)
tail NEXT
CODEHEADER STATE, _ABORTCOMM, 0x01
#(-- addr)
la t0, CREATEFLAG
addi sp, sp, -8
sd t0, 0(sp)
tail NEXT
CODEHEADER _BRACKETCHAR, STATE, 0x0
#("spaces<name>" --) at interpretation
#(-- char) at runtime
#compiled version
ld a2, 0(s7)
add s7, s7, 8
mv a0, s7
add s7, s7, a2
li t0, 7
and t1, s7, t0
beqz t1, _bracketchar_adjustment_over
li t2, 8
sub t2, t2, t1
add s7, s7, t2
_bracketchar_adjustment_over:
j bracketchar_completion
CODEHEADERZ BRACKETCHAR, [CHAR], _BRACKETCHAR, 0x01
#("spaces<name>" --) at interpretation
#(-- char) at runtime
#places first char of name on stack
ld a0, INPUT_START
PUSH a0
ld a1, INPUT_END
call utility_find_string
beqz a0, bracketchar_error
#a0 has start, a1 has end + 1, a2 has length
sd a1, INPUT_START, t5
la t0, INPUT_DISPLACE
ld t1, 0(t0)
add t2, t1, a2
POP t3
sub t4, a0, t3
add t5, t2, t4
sd t5, 0(t0)
bracketchar_completion:
lb t0, 0(a0)
addi sp, sp, -8
sd t0, 0(sp)
tail NEXT
bracketchar_error:
tail variable_gone_bad
CODEHEADER CASE, BRACKETCHAR, 0x01
#( -- )
tail NEXT
CODEHEADER ENDOF, CASE, 0x01
# get to endcase
ld t1, 0(s7)
la t0, WA_ENDCASE
check_endcase:
beq t1, t0, set_endcase
addi s7, s7, 8
ld t1, 0(s7)
j check_endcase
set_endcase:
tail NEXT
CODEHEADER _OF, ENDOF, 0x00
ld t0, 0(sp)
ld t1, 8(sp)
addi sp, sp, 8
beq t0, t1, _of_execute
#did not match so advance until we hit ENDOF
la t0, WA_ENDOF
_of_keep_looking:
ld t1, 0(s7)
addi s7, s7, 8
beq t0, t1, _of_execute
j _of_keep_looking
_of_execute:
tail NEXT
CODEHEADER OF, _OF, 0x01
#do nothing in immediate mode
tail NEXT
CODEHEADER ENDCASE, OF, 0x01
addi sp, sp, STACKOFFSET
tail NEXT
CODEHEADERZ ZERONE, 0<>, ENDCASE, 0x01
#(x -- flag)
ld t0, 0(sp)
bnez t0, zerone_not_zero
sd zero, 0(sp)
tail NEXT
zerone_not_zero:
li t0, -1
sd t0, 0(sp)
tail NEXT
CODEHEADERZ ZEROMORE, 0>, ZERONE, 0x01
#(n -- flag)
ld t0, 0(sp)
bgt t0, zero, zerone_not_zero #see above
sd zero, 0(sp)
tail NEXT
CODEHEADERZ TWOFETCH, 2@, ZEROMORE, 0x01
#(addr -- x1 x2)
ld t0, 0(sp)
ld t1, 0(t0)
ld t2, 8(t0)
sd t2, 0(sp)
addi sp, sp, -8
sd t1, 0(sp)
tail NEXT
CODEHEADER SEQ, TWOFETCH, 0x01
# expanded to/from S\"
# does nothing in interpretation
tail NEXT
CODEHEADER _SEQ, SEQ, 0x0
#( -- c-addr u)
ld t0, 0(s7)
ld t1, 8(s7)
mv t2, s7
addi t2, t2, 16
addi sp, sp, -16
sd t2, 8(sp)
sd t1, 0(sp)
mv s7, t0
tail NEXT
CODEHEADERZ TIMESDIV, */, _SEQ, 0x01
#(n1 n2 n3 -- n4)
# n1 * n2 -> d, d / n3 -> n4
ld a0, 0(sp) #n3 - divisor
ld a1, 8(sp) #n2
ld a2, 16(sp) #n1
addi sp, sp, 16 #
beqz a2, timesdiv_zero_div #no division by zero
mulh t0, a1, a2
mul t1, a1, a2
rem t4, t0, a0
mv a1, t1
mv a2, a0
mv a0, t0
mv a3, t0
call long_division_signed
beqz a7, timesdiv_zero_div #failure
sd a0, 0(sp)
tail NEXT
timesdiv_zero_div:
sd zero, 0(sp)
tail NEXT
CODEHEADERZ IDSOURCE, SOURCE-ID, TIMESDIV, 0x01
#(-- 0 | -1)
la t0, SOURCEID
ld t1, 0(t0)
addi sp, sp, -8
sd t1, 0(sp)
tail NEXT
CODEHEADERZ SAVEINPUT, SAVE-INPUT, IDSOURCE, 0x0
#(-- 0)
#added for completeness, but merely puts a zero on the stack
addi sp, sp, -8
sd zero, 0(sp)
tail NEXT
CODEHEADERZ RESTOREINPUT, RESTORE-INPUT, SAVEINPUT, 0x0
#(xn...x1 n --- flag)
#current this just empties the stack and posts TRUE flag
ld t0, 0(sp)
li t1, -8
mul t0, t0, t1
add sp, sp, t0
li t0, 0xFFFFFFFFFFFFFFFF
sd t0, 0(sp)
tail NEXT
CODEHEADER REFILL, RESTOREINPUT, 0x0
#(-- flag)
#puts -1 (TRUE) on the stack
li t0, 0xFFFFFFFFFFFFFFFF
addi sp, sp, -8
sd t0, 0(sp)
tail OLSEMI #pull in a line
CODEHEADERZ PARSENAME, PARSE-NAME, REFILL, 0x01
#( "<spaces>name<space>" -- c-addr u )
la t0, INPUT_START
ld a0, 0(t0)
addi a1, a0, 512
call utility_find_string
addi sp, sp, -16
li t0, 512
bne a2, t0, parsename_found
# found nothing
sd zero, 0(sp)
tail NEXT
parsename_found:
sd a0, 8(sp)
sd a2, 0(sp)
la t0, INPUT_START
addi a1, a1, 1
sd a1, 0(t0)
tail NEXT
CODEHEADER PARSE, PARSENAME, 0x01
#char "ccc<char>" -- c-addr u
ld t0, 0(sp)
la t1, INPUT_START
ld t1, 0(t1)
li t2, 0x20
li t3, 0x0A
addi a0, t1, 512
mv a6, zero
mv a7, zero
parse_look_for_start:
lb t4, 0(t1)
addi t1, t1, 1
bgt t1, a0, parse_done
beq t4, t2, parse_look_for_start
beq t4, t3, parse_look_for_start
mv a1, t1
addi a1, a1, -1
parse_look_for_end:
beq t4, t0, parse_finished
addi t1, t1, 1
bgt t1, a0, parse_finished
lb t4, 0(t1)
j parse_look_for_end
parse_finished:
sub a7, t1, a1
mv a6, a1
la t1, INPUT_START
add t2, a7, a6
addi t2, t2, 1
sd t2, 0(t1)
parse_done:
sd a6, 0(sp)
addi sp, sp, -8
sd a7, 0(sp)
tail NEXT
CODEHEADER WORD, PARSE, 0x01
#char "<chars>ccc<char> -- c-addr
ld a1, 0(sp)
la a0, INPUT_START
ld a0, 0(a0)
call utility_parse_string
la t0, INPUT_START
add t1, a0, a1
addi t1, t1, 1
sd t1, 0(t0)
mv a2, a0
la a0, SCRATCH_PAD
call utility_copy_counted_string
la t0, SCRATCH_PAD
sd t0, 0(sp)
tail NEXT
CODEHEADERZ ZEROLESS, 0<, WORD, 0x01
#(n -- flag)
ld t0, 0(sp)
bltz t0, zeroless_true
sd zero, 0(sp)
tail NEXT
zeroless_true:
li t1, -1
sd t1, 0(sp)
tail NEXT
CODEHEADER ZEROEQUAL, ZEROLESS, 0x01
#(n -- flag)
ld t0, 0(sp)
beqz t0, zeroless_true
sd zero, 0(sp)
tail NEXT
CODEHEADERZ TWOTIMES, 2*, ZEROEQUAL, 0x01
#(x -- x)
li t0, 2
ld t1, 0(sp)
mul t2, t1, t0
sd t2, 0(sp)
tail NEXT
CODEHEADERZ TWODIV, 2/, TWOTIMES, 0x01
#(x -- x)
ld t0, 0(sp)
srai t1, t0, 1
sd t1, 0(sp)
tail NEXT
CODEHEADERZ TWOSTORE, 2!, TWODIV, 0x01
ld t0, 0(sp)
ld t1, 8(sp)
ld t2, 16(sp)
addi sp, sp, 24
sd t1, 0(t0)
sd t2, 8(t0)
tail NEXT
CODEHEADERZ TIMESDIVMOD, */MOD, TWOSTORE, 0x01
#(n1 n2 n3 -- n4 n5)
#same code as DIVMOD - but with remainder stored
ld a0, 0(sp) #n3
ld a1, 8(sp) #n2
ld a2, 16(sp) #n1
addi sp, sp, 24 #slow call, so just make stack manip clear
li t0, 0x8000000000000000
and t1, a2, t0
and t2, a1, t0
PUSH a0
mv a0, a2
xor a2, t1, t2
beqz a2, timesdivmod_call_multiply
li a2, 1
timesdivmod_call_multiply:
addi sp, sp, -16 #needed for call
call multiple_bit_calculate_signed
#a1 has lower part, a0 has upper
#get rid of stack
addi sp, sp, 16
#now division time
POP a2
rem t0, a0, a2
mv a0, t0
call long_division_signed
addi sp, sp, -16
beqz a7, timesdivmod_fail
sd a1, 8(sp)
sd a0, 0(sp)
tail NEXT
timesdivmod_fail:
sd zero, 8(sp)
sd zero, 0(sp)
tail NEXT
CODEHEADER PAGE, TIMESDIVMOD, 0x01
#(--)
#Clear the screen go home, reset all settings
# \e[2J\ec
addi sp, sp, -56
li t0, 0x63
sd t0, 40(sp)
li t0, 0x1B
sd t0, 32(sp)
li t0, 0x4A
sd t0, 24(sp)
li t0, 0x32
sd t0, 16(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x90
sd t0, 48(sp)
j DISPLAY
CODEHEADER YELLOW, PAGE, 0x01
#Yellow foreground text
#\e[33m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER WHITE, YELLOW, 0x01
#Normal white on black text
#\e[37m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x37
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER RED, WHITE, 0x01
#red text
#\e[31m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x31
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER GREEN, RED, 0x01
#green text
#\e[32m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x32
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BLUE, GREEN, 0x01
#blue text
#\e[34m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x34
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER MAGENTA, BLUE, 0x01
#magenta text
#\e[35m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x35
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER CYAN, MAGENTA, 0x01
#cyan text
#\e[36m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x36
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BYELLOW, CYAN, 0x01
#Yellow background
#\e[43m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x33
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BWHITE, BYELLOW, 0x01
#white background
#\e[47m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x37
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BRED, BWHITE, 0x01
#red background
#\e[41m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x31
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BGREEN, BRED, 0x01
#green background
#\e[42m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x32
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BBLUE, BGREEN, 0x01
#blue background
#\e[44m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x34
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BMAGENTA, BBLUE, 0x01
#magenta background
#\e[45m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x35
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BCYAN, BMAGENTA, 0x01
#cyan background
#\e[46m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x36
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BLACK, BCYAN, 0x01
#black text
#\e[30m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x33
sd t0, 16(sp)
li t0, 0x30
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BBLACK, BLACK, 0x01
#black background
#\e[40m
addi sp, sp, -48
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x30
sd t0, 24(sp)
li t0, 0x6D
sd t0, 32(sp)
li t0, 0x90
sd t0, 40(sp)
j DISPLAY
CODEHEADER BRIGHT, BBLACK, 0x01
#bright foreground
#\e[1m
addi sp, sp, -40
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x31
sd t0, 16(sp)
li t0, 0x6D
sd t0, 24(sp)
li t0, 0x90
sd t0, 32(sp)
j DISPLAY
CODEHEADER RESET, BRIGHT, 0x01
#reset display attributes
#\e[0m
addi sp, sp, -40
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x30
sd t0, 16(sp)
li t0, 0x6D
sd t0, 24(sp)
li t0, 0x90
sd t0, 32(sp)
j DISPLAY
CODEHEADER BLINK, RESET, 0x01
# (slow) blinking text
# \e[5m
addi sp, sp, -40
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x35
sd t0, 16(sp)
li t0, 0x6D
sd t0, 24(sp)
li t0, 0x90
sd t0, 32(sp)
j DISPLAY
CODEHEADER UNDERLINE, BLINK, 0x01
# underlined text
# \e[4m
addi sp, sp, -40
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x34
sd t0, 16(sp)
li t0, 0x6D
sd t0, 24(sp)
li t0, 0x90
sd t0, 32(sp)
j DISPLAY
CODEHEADER CROSSEDOUT, UNDERLINE, 0x01
# crossedout text (may not work)
# \e[9m
addi sp, sp, -40
li t0, 0x1B
sd t0, 0(sp)
li t0, 0x5B
sd t0, 8(sp)
li t0, 0x39
sd t0, 16(sp)
li t0, 0x6D
sd t0, 24(sp)
li t0, 0x90
sd t0, 32(sp)
j DISPLAY
CODEHEADER _TERMIOSSTRING, CROSSEDOUT, 0x0
# compiled version of TERMIOSSTRING
ld t0, 0(s7) # length to offset
addi t0, t0, -2 # discount inverted commas (0x22)
la t1, SCRATCH_PAD
li t2, 0x1B
sb t2, 0(t1)
li t2, 0x5B
sb t2, 1(t1)
addi t1, t1, 2
#now write out string
mv t3, s7
addi t3, t3, ADDRWIDTH + 1 # skip "
mv t4, t0
termios__loop:
beqz t4, termios__end
lb t5, 0(t3)
sb t5, 0(t1)
addi t3, t3, 1
addi t1, t1, 1
addi t4, t4, -1
j termios__loop
termios__end:
#write out the end
mv s7, t3
addi s7, s7, 1 # beyond "
li a0, 0x07
and a2, s7, a0
beqz a2, termios__out
li a1, 0x08
sub a3, a1, a2
add s7, s7, a3
termios__out:
addi t0, t0, 2
la t1, SCRATCH_PAD
WRITESTRINGR t1, t0
tail NEXT
CODEHEADER TERMIOSSTRING, _TERMIOSSTRING, 0x01
# general termios output
# format...
# read in the last two numbers on the stack
# "cccc" ---
# takes the string and tops and tails it as termios
mv a1, sp # used to restore
mv a2, zero # count up jump in input
mv a3, zero # length of string
addi sp, sp, -16 # for \e[
la t0, INPUT_START # look for start of string
la t6, SCRATCH_PAD
ld t0, 0(t0)
li t2, 0x20 # space
li t3, 0x0A # nl
li t4, 0x22 # "
li t5, 0x27 # '
termios_look_for_start:
addi a2, a2, 1
lb t1, 0(t0)
beq t1, t4, termios_start
beq t1, t5, termios_start
beq t1, t3, termios_fail
addi t0, t0, 1
j termios_look_for_start
termios_fail:
mv a1, sp
la t0, INPUT_START
ld t1, 0(t0)
add t2, t1, a2
sd t2, 0(t0)
la a0, Error_msg
call puts
tail NEXT
termios_loop:
termios_start:
addi t0, t0, 1
addi a2, a2, 1
lb t1, 0(t0)
beq t1, t4, termios_done
beq t1, t5, termios_done
beq t1, t3, termios_fail
beq t1, t2, termios_fail
addi sp, sp, -8
sb t1, 0(t6) # write to scratch pad
addi t6, t6, 1
addi a3, a3, 1 # count up characters
j termios_loop
termios_done:
# add in the end stuff
addi sp, sp, -16
la t0, SCRATCH_PAD
mv t1, zero
mv t2, sp
li t3, 0x1B
sd t3, 0(t2)
li t3, 0x5B
sd t3, 8(t2)
addi t2, t2, 16
termios_copy_scratch_pad:
lb t3, 0(t0)
sd t3, 0(t2)
addi a3, a3, -1 # have we written everything yet?
beqz a3, termios_final_write
addi t0, t0, 1 # advance through scratch pad
addi t2, t2, 8 # advance through stack
j termios_copy_scratch_pad
termios_final_write:
li t3, 0x90
sd t3, 8(t2)
la t0, INPUT_START # update input point
ld t1, 0(t0)
add t2, t1, a2
addi a2, a2, 1
sd t2, 0(t0)
la a3, INPUT_DISPLACE
ld a4, 0(a3)
add a4, a4, a2
sd a4, 0(a3)
j DISPLAY
CODEHEADER READFD, TERMIOSSTRING, 0x01
#( fd addr cnt -- cnt )
ld a2, 0(sp)
ld a1, 8(sp)
ld a0, 16(sp)
addi sp, sp, 16
call read
sd a0, 0(sp)
tail NEXT
CODEHEADER ABORTCOMM, READFD, 0x01
#does nothing in interpretration mode
tail NEXT
CODEHEADER RECURSE, ABORTCOMM, 0x01
#does nothing on interpretation
#compilation handled in search_create
tail NEXT
CODEHEADER PAD, RECURSE, 0x01
la t0, SCRATCH_PAD
PUSH t0
tail NEXT
CODEHEADER FILL, PAD, 0x01
ld t0, 0(sp)
ld t1, 8(sp)
beqz t1, fill_done
ld t2, 16(sp)
fill_fill:
sb t0, 0(t2)
addi t2, t2, 1
addi t1, t1, -1
bnez t1, fill_fill
fill_done:
addi sp, sp, 24
tail NEXT
CODEHEADER ERASE, FILL, 0x01
ld t0, 0(sp)
beqz t0, erase_done
ld t1, 8(sp)
erase_erase:
sb zero, 0(t1)
addi t1, t1, 1
addi t0, t0, -1
bnez t0, erase_erase
erase_done:
addi sp, sp, 16
tail NEXT
CODEHEADERZ PLUSSTORE, +!, ERASE, 0x01
ld t0, 0(sp)
ld t1, 8(sp)
addi sp, sp, 16
ld t2, 0(t0)
add t2, t1, t2
sd t2, 0(t0)
tail NEXT
CODEHEADER LSHIFT, PLUSSTORE, 0x01
ld t0, 0(sp)
ld t1, 8(sp)
li t2, 64
addi sp, sp, 8
bge t0, t2, lshift_set_zero
sll t1, t1, t0
sd t1, 0(sp)
tail NEXT
lshift_set_zero:
sd zero, 0(sp)
tail NEXT
CODEHEADER RSHIFT, LSHIFT, 0x01
ld t0, 0(sp)
ld t1, 8(sp)
li t2, 64
addi sp, sp, 8
bge t0, t2, lshift_set_zero
srl t1, t1, t0
sd t1, 0(sp)
tail NEXT
CODEHEADER _WHILE, RSHIFT, 0x0
ld t0, 0(sp)
addi sp, sp, 8
beqz t0, _while_finished
addi s7, s7, 16 #true path
tail NEXT
_while_finished:
ld t0, 0(s7)
beqz t0, _while_then
_while_continuation:
mv s7, t0
tail NEXT
_while_then:
ld t0, 8(s7)
bnez t0, _while_continuation
_while_failed: