|
DataMuseum.dkPresents historical artifacts from the history of: Commodore CBM-900 |
This is an automatic "excavation" of a thematic subset of
See our Wiki for more about Commodore CBM-900 Excavated with: AutoArchaeologist - Free & Open Source Software. |
top - metrics - download
Length: 21587 (0x5453)
Types: TextFile
Notes: UNIX file
Names: »small1.s«
└─⟦f27320a65⟧ Bits:30001972 Commodore 900 hard disk image with partial source code
└─⟦2d53db1df⟧ UNIX Filesystem
└─⟦this⟧ »hr/src/smgr/small1.s«
#define srcptr rr6
#define srclow r7
#define srchi r7
#define dstptr rr4
#define dstlow r5
#define dsthi rh4
#define fpline r1
#define lines r11
#define mask r10
#define dst2 rr12
#define dst2h r12
#define dst2l r13
.globl Small_ret
.prvi
//
TMcode:
.long smt0
.long smt1
.long smt2
.long smt3
.long smt4
.long smb5
.long smt6
.long smt7
.long smt8
.long smt9
.long smt10
.long smt11
.long smt12
.long smt13
.long smt14
.long smt15
BMcode:
.long smb0
.long smb1
.long smb2
.long smb3
.long smb4
.long smb5
.long smb6
.long smb7
.long smb8
.long smb9
.long smb10
.long smb11
.long smb12
.long smb13
.long smb14
.long smb15
TNcode:
.long smt0
.long smt1
.long smt2
.long snt3 // different
.long smt4
.long smb5
.long snt6 // different
.long smt7
.long smt8
.long smt9
.long smt10
.long smt11
.long smt12
.long smt13
.long smt14
.long smt15
BNcode:
.long smb0
.long smb1
.long smb2
.long snb3
.long smb4
.long smb5
.long snb6
.long smb7
.long smb8
.long smb9
.long smb10
.long smb11
.long snb12
.long smb13
.long smb14
.long smb15
//
.globl BLT_small_
BLT_small_: //
lda rr4, sreg_
ldm @rr4, r8, $6
ldl rr2, BLT_pat_ptr_// copy the stippling pattern into
lda rr4, spat_ // into a private area
ld r0, $16
ldir @rr4, @rr2, r0
// mask = BLT_tbl1[width]
ld r5, BLT_width_ // get width
ld r1, r5 // copy width into r1
sll r5 // double for offset into table 1
ld mask, BLT_tbl1_(r5)
// mask2 = (~BLT_tbl2[width] >> dptr.bit )
sub r3,r3
ld r2, BLT_tbl2_(r5)
ld r5, BLT_dptrb_ // r5 contains dptr.bit
neg r5
sdll rr2, r5
com r2
com r3
ldl mask2_, rr2
// now compute the shift amount to src and dst.
// ss = 32 - width - sptr.bit
// ds = 32 - width - dptr.bit
ld r5, BLT_dptrb_
ld r6, $32 // r6 = 32
sub r6, r1 // r6 -= width
ld r4, r6 // for dptr
sub r4, r5 // old r6 -= dptr.bit
ld ds_, r4 // save into ds_
ld r4, r6 // again get 32 - width
ld r5, BLT_sptrb_ // load sptr.bit
sub r4, r5
ld ss_, r4
ldl srcptr, BLT_sptrw_
ldl dstptr, BLT_dptrw_
ld lines, BLT_height_
ld fpline, BLT_pat_index_
// initial setups now complete
ld r8, BLT_op_
sll r8, $2 // double op for index into table
test spao_
jr z, pat_matters
test BLT_direction_
jr z, blt_bot2
lda rr2, TNcode
add r3, r8
ldl rr8, @rr2
jp @rr8
blt_bot2:
lda rr2, BNcode
add r3, r8
ldl rr8, @rr2
jp @rr8
pat_matters:
test BLT_direction_
jr z, blt_bottom
lda rr2, TMcode // base of top-down code
add r3, r8 // offset of logical op code
ldl rr8, @rr2 // ld the.longess
jp @rr8 // and go there
blt_bottom:
lda rr2, BMcode
add r3, r8
ldl rr8, @rr2
jp @rr8 // jump to logical routine
Small_ret:
// restore rr8-rr14 and return
lda rr4, sreg_
ldm r8, @rr4, $6
ret
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = false
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
smt0: // false... pattern doesn't matter
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl @dstptr, dst2
sub r0, r0
add dstlow, BLT_dinc_// inc dst ^
adcb dsthi, rh0 // check for segment overflow
djnz lines, smt0// while more raster lines, repeat
jp Small_ret // else return
smb0: // false... pattern doesn't matter
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl @dstptr, dst2
sub r0, r0
sub dstlow, BLT_dinc_// inc dst ^
sbcb dsthi, rh0 // check for segment overflow
djnz lines, smb0// while more raster lines, repeat
jp Small_ret // else return
//
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = src & dst
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
smt1: // src & dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in low r3
ldl rr8, @srcptr // load thirty two bits of source
and r9, spat_(fpline)// src = src & pattern
and r8, spat_(fpline)
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for change in low r5
// THE OPERATION
and r3, r9 // dst = dst & src
and r3, mask // dst = dst & mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
inc fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smt1// while more raster lines, repeat
jp Small_ret
smb1: // src & dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in low r3
ldl rr8, @srcptr // load thirty two bits of source
and r9, spat_(fpline)// src = src & pattern
and r8, spat_(fpline)
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for change in low r5
// THE OPERATION
and r3, r9 // dst = dst & src
and r3, mask // dst = dst & mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
dec fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smb1// while more raster lines, repeat
jp Small_ret
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = src & (~dst)
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
smt2: // src & (~dst)
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
com r3 // src & (~dst)
and r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
inc fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smt2// while more raster lines, repeat
jp Small_ret
smb2: // src & (~dst)
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
com r3 // src & (~dst)
and r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
dec fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smb2// while more raster lines, repeat
jp Small_ret
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = src
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
snt3: // src
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl rr8, @srcptr // load thirty two bits of source
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
and r9, mask
// Shift the answer back over to line up with the hole and add it in
sub r8, r8
ld r0, ds_
sdll rr8, r0
addl rr8, dst2
ldl @dstptr, rr8 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
djnz lines, snt3 // while more raster lines, repeat
jp Small_ret
snb3: // src
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl rr8, @srcptr // load thirty two bits of source
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
and r9, mask
// Shift the answer back over to line up with the hole and add it in
sub r8, r8
ld r0, ds_
sdll rr8, r0
addl rr8, dst2
ldl @dstptr, rr8 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
djnz lines, snb3 // while more raster lines, repeat
jp Small_ret
smt3: // src
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
and r9, mask
// Shift the answer back over to line up with the hole and add it in
sub r8, r8
ld r0, ds_
sdll rr8, r0
addl rr8, dst2
ldl @dstptr, rr8 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
inc fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smt3 // while more raster lines, repeat
jp Small_ret
smb3: // src
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
and r9, mask
// Shift the answer back over to line up with the hole and add it in
sub r8, r8
ld r0, ds_
sdll rr8, r0
addl rr8, dst2
ldl @dstptr, rr8 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
dec fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smb3 // while more raster lines, repeat
jp Small_ret
//
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = (~src) & dst
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
smt4: // (~src) & dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
com r9 // (~src) & dst
and r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
inc fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smt4 // while more raster lines, repeat
jp Small_ret
smb4: // (~src) & dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
com r9 // (~src) & dst
and r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
dec fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smb4 // while more raster lines, repeat
jp Small_ret
//
// +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = dst... among the stupidest ops
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
smb5: // dst ... kinda silly
jp Small_ret
//
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// OP = src ^ dst
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
snt6: // src ^ dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
xor r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
djnz lines, snt6 // while more raster lines, repeat
jp Small_ret
//
snb6: // src ^ dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
xor r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
djnz lines, snb6 // while more raster lines, repeat
jp Small_ret
smt6: // src ^ dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
xor r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
add srclow, BLT_sinc_ // increment the src ^
adcb srchi, rh0 // check for segment overflow
add dstlow, BLT_dinc_ // increment the dst ^
adcb dsthi, rh0 // check for segment overflow
inc fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smt6 // while more raster lines, repeat
jp Small_ret
smb6: // src ^ dst
// first create the dst word with a hole in it for the new stuff
ldl dst2, mask2_ // mask with hole in it
ldl rr2, @dstptr // dst word
and dst2h, r2 // 'and' them together
and dst2l, r3 // " " "
// now perform the operation ... the dst word is still safe in rr2
ld r0, ds_
neg r0 // must be negative for right movement
sdll rr2, r0 // the bits to change are in least sig bits
// of r3
ldl rr8, @srcptr // load thirty two bits of source
and r8, spat_(fpline)// src = src & pattern
and r9, spat_(fpline)// src = src & pattern
ld r0, ss_
neg r0 // must be negative for right movement
sdll rr8, r0 // the bits to use for the change are now in
// the least sig bits of r5
// THE OPERATION
xor r3, r9
and r3, mask
// Shift the answer back over to line up with the hole and add it in
sub r2, r2
ld r0, ds_
sdll rr2, r0
addl rr2, dst2
ldl @dstptr, rr2 // store it back in
sub r0, r0
sub srclow, BLT_sinc_ // increment the src ^
sbcb srchi, rh0 // check for segment overflow
sub dstlow, BLT_dinc_ // increment the dst ^
sbcb dsthi, rh0 // check for segment overflow
dec fpline, $2 // increment pattern index
and fpline, $31 // with wrap around at 16th line
djnz lines, smb6 // while more raster lines, repeat
jp Small_ret