diff options
Diffstat (limited to 'apps/factorial2.subx')
-rw-r--r-- | apps/factorial2.subx | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/apps/factorial2.subx b/apps/factorial2.subx deleted file mode 100644 index 22c3d5be..00000000 --- a/apps/factorial2.subx +++ /dev/null @@ -1,122 +0,0 @@ -## compute the factorial of 5, and return the result in the exit code -# -# Uses syntax sugar for: -# rm32 operands -# -# To run: -# $ ./translate_subx init.linux [01]*.subx apps/factorial.subx -o apps/factorial -# $ ./bootstrap run apps/factorial -# Expected result: -# $ echo $? -# 120 -# -# You can also run the automated test suite: -# $ ./bootstrap run apps/factorial test -# Expected output: -# ........ -# Every '.' indicates a passing test. Failing tests get a 'F'. -# -# Compare apps/factorial.subx - -== code - -factorial: # n: int -> _/eax: int - # . prologue - 55/push-ebp - 89/<- %ebp 4/r32/esp - # save registers - 51/push-ecx - # if (n <= 1) return 1 - b8/copy-to-eax 1/imm32 - 81 7/subop/compare *(ebp+8) 1/imm32 - 7e/jump-if-<= $factorial:end/disp8 - # n > 1; return n * factorial(n-1) - 8b/-> *(ebp+8) 1/r32/ecx - 49/decrement-ecx - # var tmp/eax: int = factorial(n-1) - # . . push args - 51/push-ecx - # . . call - e8/call factorial/disp32 - # . . discard args - 81 0/subop/add %esp 4/imm32 - # return n * tmp - f7 4/subop/multiply-into-eax *(ebp+8) - # TODO: check for overflow -$factorial:end: - # restore registers - 59/pop-to-ecx - # . epilogue - 89/<- %esp 5/r32/ebp - 5d/pop-to-ebp - c3/return - -test-factorial: - # factorial(5) - # . . push args - 68/push 5/imm32 - # . . call - e8/call factorial/disp32 - # . . discard args - 81 0/subop/add %esp 4/imm32 - # check-ints-equal(eax, 120, msg) - # . . push args - 68/push "F - test-factorial"/imm32 - 68/push 0x78/imm32/expected-120 - 50/push-eax - # . . call - e8/call check-ints-equal/disp32 - # . . discard args - 81 0/subop/add %esp 0xc/imm32 - # end - c3/return - -Entry: # run tests if necessary, compute `factorial(5)` if not - # . prologue - 89/<- %ebp 4/r32/esp - - # initialize heap (needed by tests elsewhere) - # . Heap = new-segment(Heap-size) - # . . push args - 68/push Heap/imm32 - ff 6/subop/push *Heap-size - # . . call - e8/call new-segment/disp32 - # . . discard args - 81 0/subop/add %esp 8/imm32 - - # if (argc <= 1) return factorial(5) - 81 7/subop/compare *ebp 1/imm32 - 7f/jump-if-> $main:run-tests/disp8 - # . . push args - 68/push 5/imm32 - # . . call - e8/call factorial/disp32 - # . . discard args - 81 0/subop/add %esp 4/imm32 - # . - 89/<- %ebx 0/r32/eax - eb/jump $main:end/disp8 -$main:run-tests: - # otherwise if first arg is "test", then return run_tests() - # if (!kernel-string-equal?(argv[1], "test")) goto do-nothing - # . eax = kernel-string-equal?(argv[1], "test") - # . . push args - 68/push "test"/imm32 - ff 6/subop/push *(ebp+8) - # . . call - e8/call kernel-string-equal?/disp32 - # . . discard args - 81 0/subop/add %esp 8/imm32 - # . if (eax == false) goto do-nothing - 3d/compare-eax-and 0/imm32/false - 74/jump-if-= $main:do-nothing/disp8 - # run-tests() - e8/call run-tests/disp32 - # exit(*Num-test-failures) - 8b/-> *Num-test-failures 3/r32/ebx - eb/jump $main:end/disp8 -$main:do-nothing: - bb/copy-to-ebx 0/imm32 -$main:end: - e8/call syscall_exit/disp32 |