New files: alloca86.S alloca86-bt.S

2007-11-23 00:03:03 +00:00
parent d778bde7f9
commit 3e8b9e6d10
2 changed files with 69 additions and 0 deletions
--- a/alloca86.S
+++ b/alloca86.S
@ -0,0 +1,27 @@
+/* ---------------------------------------------- */
+/* alloca86.S */
+
+.globl _alloca
+
+_alloca:
+    pop     %edx
+    pop     %eax
+    add     $3,%eax
+    and     $-4,%eax
+    jz      p3
+p1:
+    cmp     $4096,%eax
+    jle     p2
+    sub     $4096,%esp
+    sub     $4096,%eax
+    test    %eax,(%esp)
+    jmp p1
+p2:
+    sub     %eax,%esp
+    mov     %esp,%eax
+p3:
+    push    %edx
+    push    %edx
+    ret
+
+/* ---------------------------------------------- */