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| author | Kartik Agaram <vc@akkartik.com> | 2020-03-14 01:06:27 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-03-14 01:06:27 -0700 |
| commit | 9428990bd6e61988df23811205504a5c63a348e1 (patch) | |
| tree | f655a395122dd58b555d0ec6b506d29b8bc6be3d /apps | |
| parent | b7b24ec242b67614e0ab01b681cdfd90b28a4095 (diff) | |
| download | mu-9428990bd6e61988df23811205504a5c63a348e1.tar.gz | |
6143
Diffstat (limited to 'apps')
| -rw-r--r-- | apps/factorial.mu | 2 | ||||
| -rw-r--r-- | apps/factorial4.subx | 12 |
2 files changed, 8 insertions, 6 deletions
diff --git a/apps/factorial.mu b/apps/factorial.mu index 128ac9ad..722c9e6c 100644 --- a/apps/factorial.mu +++ b/apps/factorial.mu @@ -2,6 +2,8 @@ # ./translate_mu apps/factorial.mu # ./a.elf test # to run tests # ./a.elf # to run factorial(5) +# +# Compare apps/factorial4.subx fn factorial n: int -> result/eax: int { compare n 1 diff --git a/apps/factorial4.subx b/apps/factorial4.subx index 9ab7038f..3aae0dd3 100644 --- a/apps/factorial4.subx +++ b/apps/factorial4.subx @@ -60,7 +60,7 @@ factorial: # n: int -> int/eax 55/push-ebp 89/<- %ebp 4/r32/esp # save registers - 53/push-ebx + 51/push-ecx # if (n <= 1) return 1 81 7/subop/compare *(ebp+8) 1/imm32 { @@ -70,14 +70,14 @@ factorial: # n: int -> int/eax # if (n > 1) return n * factorial(n-1) { 7e/jump-if-<= break/disp8 - # var ebx: int = n-1 - 8b/-> *(ebp+8) 3/r32/ebx - 4b/decrement-ebx - (factorial %ebx) # => eax + # var tmp/ecx: int = n-1 + 8b/-> *(ebp+8) 1/r32/ecx + 49/decrement-ecx + (factorial %ecx) # => eax f7 4/subop/multiply-into-eax *(ebp+8) } # restore registers - 5b/pop-to-ebx + 59/pop-to-ecx # . epilogue 89/<- %esp 5/r32/ebp 5d/pop-to-ebp |