Changeset 66237 in vbox

Timestamp:

Mar 23, 2017 5:43:19 PM (8 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

114158

Message:

ASMBitNextClear.asm: 32-bit bugfix (harmless outside bs3kit).

File:

• trunk/src/VBox/Runtime/common/asm/ASMBitNextClear.asm (modified) (3 diffs)

trunk/src/VBox/Runtime/common/asm/ASMBitNextClear.asm

@@ -66 +66 @@
 %elif ARCH_BITS == 32
         mov     edi, [esp + 8]          ; edi=pvBits
-        mov     ecx, [esp + 8 + 8]      ; edx=iPrevBit
+        mov     ecx, [esp + 8 + 8]      ; ecx=iPrevBit
 %elif ARCH_BITS == 16
-        mov     ax,  [bp + 4 + 2]
-        mov     es, ax
-        mov     di,  [bp + 4]           ; es:di=pvBits
-        mov     ecx, [bp + 4 + 8]       ; edx=iPrevBit
+        les     di, [bp + 4]            ; es:di=pvBits
+        mov     ecx, [bp + 4 + 8]       ; ecx=iPrevBit
 %endif
 
@@ -140 +138 @@
 
         ; Do the scanning.
+        cld
         mov     eax, 0ffffffffh
         repe scasd
@@ -160 +159 @@
         movzx   edi, di
 %elif ARCH_BITS == 32
-        sub     xDI, [esp + 4]
+        sub     xDI, [esp + 8]
 %elif ARCH_BITS == 64
         sub     xDI, r9