Fix mistake. Change jb by jbe. tiny c round (INT_MAX = 0x7FFFFFFF) to a DWORD boundary and it becomes 0x80000000. Jle treats as -214783648, but Jbe treats as 214783648. Thanks to Jason Hood for explain me this.

2025-11-16 12:34:45 +00:00 · 2014-07-10 20:41:51 -04:00
parent 8257829623
commit f2ee6b1759
3 changed files with 3 additions and 3 deletions
--- a/lib/alloca86-bt.S
+++ b/lib/alloca86-bt.S
@@ -14,7 +14,7 @@ __bound_alloca:
 #ifdef TCC_TARGET_PE
 p4:
    cmp     $4096,%eax
-    jb      p5
+    jbe     p5
    test    %eax,-4096(%esp)
    sub     $4096,%esp
    sub     $4096,%eax
--- a/lib/alloca86.S
+++ b/lib/alloca86.S
@@ -13,7 +13,7 @@ alloca:
 #ifdef TCC_TARGET_PE
 p1:
    cmp     $4096,%eax
-    jb      p2
+    jbe     p2
    test    %eax,-4096(%esp)
    sub     $4096,%esp
    sub     $4096,%eax
--- a/lib/alloca86_64.S
+++ b/lib/alloca86_64.S
@@ -17,7 +17,7 @@ alloca:
 #ifdef TCC_TARGET_PE
 p1:
    cmp     $4096,%rax
-    jb      p2
+    jbe     p2
    test    %rax,-4096(%rsp)
    sub     $4096,%rsp
    sub     $4096,%rax