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| author | Kartik Agaram <vc@akkartik.com> | 2020-01-20 02:08:12 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-01-20 02:08:12 -0800 |
| commit | cad99482ccca977b800e3b8a111b40b79442aa3e (patch) | |
| tree | ad89ea0abda68e5500cf368b09ac8d413bb01ee2 | |
| parent | f5387ede3abeb009e02cd15326f796db79af8ed0 (diff) | |
| download | mu-cad99482ccca977b800e3b8a111b40b79442aa3e.tar.gz | |
5906
Draft 2.
| -rw-r--r-- | apps/mu.subx | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/apps/mu.subx b/apps/mu.subx index 4b33f691..1b8fd8e9 100644 --- a/apps/mu.subx +++ b/apps/mu.subx @@ -1614,7 +1614,7 @@ parse-type: # ad: (address allocation-descriptor), in: (addr stream byte) -> re # result->left = pos-slice(Type-id, s) # return # result->left = parse-type(ad, in) - # result->right = parse-type(ad, in) + # result->right = parse-type-tree(ad, in) # # . prologue 55/push-ebp @@ -1685,8 +1685,8 @@ parse-type: # ad: (address allocation-descriptor), in: (addr stream byte) -> re #? (write-buffered Stderr "=> {") #? (print-int32-buffered Stderr %eax) 89/<- *edx 0/r32/eax # Tree-left - # result->right = parse-type(ad, in) - (parse-type *(ebp+8) *(ebp+0xc)) + # result->right = parse-type-tree(ad, in) + (parse-type-tree *(ebp+8) *(ebp+0xc)) #? (write-buffered Stderr Space) #? (print-int32-buffered Stderr %eax) #? (write-buffered Stderr "}\n") @@ -1717,6 +1717,38 @@ $parse-type:abort: cd/syscall 0x80/imm8 # never gets here +parse-type-tree: # ad: (address allocation-descriptor), in: (addr stream byte) -> result/eax: (handle tree type-id) + # pseudocode: + # result = allocate(Tree) + # zero-out(result, *Tree-size) + # result->left = parse-type(ad, in) + # result->right = parse-type-tree(ad, in) + # + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 52/push-edx + # var result/edx: (handle tree type-id) + (allocate *(ebp+8) *Tree-size) # => eax + (zero-out %eax *Tree-size) + 89/<- %edx 0/r32/eax + # result->left = parse-type(ad, in) + (parse-type *(ebp+8) *(ebp+0xc)) + 89/<- *edx 0/r32/eax # Tree-left + # result->right = parse-type-tree(ad, in) + (parse-type-tree *(ebp+8) *(ebp+0xc)) + 89/<- *(edx+4) 0/r32/eax # Tree-right +$parse-type-tree:return-edx: + 89/<- %eax 2/r32/edx +$parse-type-tree:end: + # . restore registers + 5a/pop-to-edx + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + next-mu-token: # in: (addr stream byte), out: (addr slice) # pseudocode: # start: |