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authorKartik Agaram <vc@akkartik.com>2019-05-25 00:43:19 -0700
committerKartik Agaram <vc@akkartik.com>2019-05-25 00:43:19 -0700
commit6c03f2edab211d90405187eafa9a0243bbd64c39 (patch)
tree91d39f253b3ff5b1c080f3591ec448d9be32e3b0 /subx
parent0b2d2d97284c41ad095e9dbbe6657b857af1c7b9 (diff)
downloadmu-6c03f2edab211d90405187eafa9a0243bbd64c39.tar.gz
new primitive: array-equal?
Diffstat (limited to 'subx')
-rw-r--r--subx/075array-equal.subx247
-rwxr-xr-xsubx/apps/assortbin22646 -> 23232 bytes
-rwxr-xr-xsubx/apps/crenshaw2-1bin19815 -> 20401 bytes
-rwxr-xr-xsubx/apps/crenshaw2-1bbin20374 -> 20960 bytes
-rwxr-xr-xsubx/apps/factorialbin18731 -> 19317 bytes
-rwxr-xr-xsubx/apps/handlebin19558 -> 20144 bytes
-rwxr-xr-xsubx/apps/hexbin22824 -> 23410 bytes
-rwxr-xr-xsubx/apps/packbin37456 -> 38042 bytes
8 files changed, 247 insertions, 0 deletions
diff --git a/subx/075array-equal.subx b/subx/075array-equal.subx
new file mode 100644
index 00000000..ebc446d8
--- /dev/null
+++ b/subx/075array-equal.subx
@@ -0,0 +1,247 @@
+# Comparing arrays of numbers.
+
+== code
+#   instruction                     effective address                                                   register    displacement    immediate
+# . op          subop               mod             rm32          base        index         scale       r32
+# . 1-3 bytes   3 bits              2 bits          3 bits        3 bits      3 bits        2 bits      2 bits      0/1/2/4 bytes   0/1/2/4 bytes
+
+Entry:
+
+    # for debugging: run a single test
+#?     e8/call test-compare-inequal-arrays-equal-lengths/disp32
+#?     8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/EBX   Num-test-failures/disp32          # copy *Num-test-failures to EBX
+#?     eb/jump  $array-equal-main:end/disp8
+
+    e8/call  run-tests/disp32  # 'run-tests' is a function created automatically by SubX. It calls all functions that start with 'test-'.
+$array-equal-main:end:
+    # syscall(exit, Num-test-failures)
+    8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/EBX   Num-test-failures/disp32          # copy *Num-test-failures to EBX
+    b8/copy-to-EAX  1/imm32/exit
+    cd/syscall  0x80/imm8
+
+array-equal?:  # a : (address array int), b : (address array int) -> EAX : boolean
+    # pseudocode:
+    #   lena = a->length
+    #   if (lena != b->length) return false
+    #   i = 0
+    #   curra = a->data
+    #   currb = b->data
+    #   while i < lena
+    #     i1 = *curra
+    #     i2 = *currb
+    #     if (c1 != c2) return false
+    #     i+=4, curra+=4, currb+=4
+    #   return true
+    #
+    # registers:
+    #   i: ECX
+    #   lena: EDX
+    #   curra: ESI
+    #   currb: EDI
+    #   i1: EAX
+    #   i2: EBX
+    #
+    # . prolog
+    55/push-EBP
+    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+    # . save registers
+    51/push-ECX
+    52/push-EDX
+    53/push-EBX
+    56/push-ESI
+    57/push-EDI
+    # ESI = a
+    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           6/r32/ESI   8/disp8         .                 # copy *(EBP+8) to ESI
+    # EDI = b
+    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           7/r32/EDI   0xc/disp8       .                 # copy *(EBP+12) to EDI
+    # lena/EDX = a->length
+    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           2/r32/EDX   .               .                 # copy *ESI to EDX
+$array-equal?:lengths:
+    # if (lena != b->length) return false
+    39/compare                      0/mod/indirect  7/rm32/EDI    .           .             .           2/r32/EDX   .               .                 # compare *EDI and EDX
+    75/jump-if-not-equal  $array-equal?:false/disp8
+    # curra/ESI = a->data
+    81          0/subop/add         3/mod/direct    6/rm32/ESI    .           .             .           .           .               4/imm32           # add to ESI
+    # currb/EDI = b->data
+    81          0/subop/add         3/mod/direct    7/rm32/EDI    .           .             .           .           .               4/imm32           # add to EDI
+    # i/ECX = i1/EAX = i2/EBX = 0
+    31/xor                          3/mod/direct    1/rm32/ECX    .           .             .           1/r32/ECX   .               .                 # clear ECX
+$array-equal?:loop:
+    # if (i >= lena) return true
+    39/compare                      3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # compare ECX with EDX
+    7d/jump-if-greater-or-equal  $array-equal?:true/disp8
+    # i1 = *curra
+    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           0/r32/EAX   .               .                 # copy *ESI to EAX
+    # i2 = *currb
+    8b/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           3/r32/EBX   .               .                 # copy *EDI to EBX
+    # if (i1 != i2) return false
+    39/compare                      3/mod/direct    0/rm32/EAX    .           .             .           3/r32/EBX   .               .                 # compare EAX and EBX
+    75/jump-if-not-equal  $array-equal?:false/disp8
+    # i += 4
+    81          0/subop/add         3/mod/direct    1/rm32/ECX    .           .             .           .           .               4/imm32           # add to ECX
+    # currs += 4
+    81          0/subop/add         3/mod/direct    6/rm32/ESI    .           .             .           .           .               4/imm32           # add to ESI
+    # currb += 4
+    81          0/subop/add         3/mod/direct    7/rm32/EDI    .           .             .           .           .               4/imm32           # add to EDI
+    eb/jump  $array-equal?:loop/disp8
+$array-equal?:true:
+    b8/copy-to-EAX  1/imm32
+    eb/jump  $array-equal?:end/disp8
+$array-equal?:false:
+    b8/copy-to-EAX  0/imm32
+$array-equal?:end:
+    # . restore registers
+    5f/pop-to-EDI
+    5e/pop-to-ESI
+    5b/pop-to-EBX
+    5a/pop-to-EDX
+    59/pop-to-ECX
+    # . epilog
+    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+    5d/pop-to-EBP
+    c3/return
+
+# - tests
+
+test-compare-empty-with-empty-array:
+    # . prolog
+    55/push-EBP
+    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+    # var ECX = []
+    68/push  0/imm32/size
+    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
+    # var EDX = []
+    68/push  0/imm32/size
+    89/copy                         3/mod/direct    2/rm32/EDX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EDX
+    # EAX = array-equal?(ECX, EDX)
+    # . . push args
+    52/push-EDX
+    51/push-ECX
+    # . . call
+    e8/call  array-equal?/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+    # check-ints-equal(EAX, 1, msg)
+    # . . push args
+    68/push  "F - test-compare-empty-with-empty-array"/imm32
+    68/push  1/imm32/true
+    50/push-EAX
+    # . . call
+    e8/call  check-ints-equal/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+    # . epilog
+    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+    5d/pop-to-EBP
+    c3/return
+
+test-compare-empty-with-non-empty-array:  # also checks length-mismatch code path
+    # . prolog
+    55/push-EBP
+    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+    # var ECX = [1]
+    68/push  1/imm32
+    68/push  4/imm32/size
+    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
+    # var EDX = []
+    68/push  0/imm32/size
+    89/copy                         3/mod/direct    2/rm32/EDX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EDX
+    # EAX = array-equal?(ECX, EDX)
+    # . . push args
+    52/push-EDX
+    51/push-ECX
+    # . . call
+    e8/call  array-equal?/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+    # check-ints-equal(EAX, 0, msg)
+    # . . push args
+    68/push  "F - test-compare-empty-with-non-empty-array"/imm32
+    68/push  0/imm32/false
+    50/push-EAX
+    # . . call
+    e8/call  check-ints-equal/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+    # . epilog
+    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+    5d/pop-to-EBP
+    c3/return
+
+test-compare-equal-arrays:
+    # . prolog
+    55/push-EBP
+    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+    # var ECX = [1, 2, 3]
+    68/push  3/imm32
+    68/push  2/imm32
+    68/push  1/imm32
+    68/push  0xc/imm32/size
+    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
+    # var EDX = [1, 2, 3]
+    68/push  3/imm32
+    68/push  2/imm32
+    68/push  1/imm32
+    68/push  0xc/imm32/size
+    89/copy                         3/mod/direct    2/rm32/EDX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EDX
+    # EAX = array-equal?(ECX, EDX)
+    # . . push args
+    52/push-EDX
+    51/push-ECX
+    # . . call
+    e8/call  array-equal?/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+    # check-ints-equal(EAX, 1, msg)
+    # . . push args
+    68/push  "F - test-compare-equal-arrays"/imm32
+    68/push  1/imm32/true
+    50/push-EAX
+    # . . call
+    e8/call  check-ints-equal/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+    # . epilog
+    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+    5d/pop-to-EBP
+    c3/return
+
+test-compare-inequal-arrays-equal-lengths:
+    # . prolog
+    55/push-EBP
+    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+    # var ECX = [1, 4, 3]
+    68/push  3/imm32
+    68/push  4/imm32
+    68/push  1/imm32
+    68/push  0xc/imm32/size
+    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
+    # var EDX = [1, 2, 3]
+    68/push  3/imm32
+    68/push  2/imm32
+    68/push  1/imm32
+    68/push  0xc/imm32/size
+    89/copy                         3/mod/direct    2/rm32/EDX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EDX
+    # EAX = array-equal?(ECX, EDX)
+    # . . push args
+    52/push-EDX
+    51/push-ECX
+    # . . call
+    e8/call  array-equal?/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+    # check-ints-equal(EAX, 0, msg)
+    # . . push args
+    68/push  "F - test-compare-inequal-arrays-equal-lengths"/imm32
+    68/push  0/imm32/false
+    50/push-EAX
+    # . . call
+    e8/call  check-ints-equal/disp32
+    # . . discard args
+    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
+    # . epilog
+    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+    5d/pop-to-EBP
+    c3/return
+
+# . . vim:nowrap:textwidth=0
diff --git a/subx/apps/assort b/subx/apps/assort
index 20cef59b..59ee757b 100755
--- a/subx/apps/assort
+++ b/subx/apps/assort
Binary files differdiff --git a/subx/apps/crenshaw2-1 b/subx/apps/crenshaw2-1
index 20110cc2..de1867ee 100755
--- a/subx/apps/crenshaw2-1
+++ b/subx/apps/crenshaw2-1
Binary files differdiff --git a/subx/apps/crenshaw2-1b b/subx/apps/crenshaw2-1b
index b93d10c2..b68d9d44 100755
--- a/subx/apps/crenshaw2-1b
+++ b/subx/apps/crenshaw2-1b
Binary files differdiff --git a/subx/apps/factorial b/subx/apps/factorial
index b3aa69c5..0b23aa8e 100755
--- a/subx/apps/factorial
+++ b/subx/apps/factorial
Binary files differdiff --git a/subx/apps/handle b/subx/apps/handle
index c99743af..0bb8ff40 100755
--- a/subx/apps/handle
+++ b/subx/apps/handle
Binary files differdiff --git a/subx/apps/hex b/subx/apps/hex
index 1ac76865..ac307015 100755
--- a/subx/apps/hex
+++ b/subx/apps/hex
Binary files differdiff --git a/subx/apps/pack b/subx/apps/pack
index 002dbda7..4c23547c 100755
--- a/subx/apps/pack
+++ b/subx/apps/pack
Binary files differ