Changeset 25664 in vbox for trunk/src/VBox/Runtime/common

Timestamp:

Jan 6, 2010 3:56:01 AM (15 years ago)

Author:

vboxsync

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

56379

Message:

ASMAtomicCmpXchgU64.asm,ASMAtomicReadU64.asm: Quickly hacked up some 64-bit code (untested).

Location:

trunk/src/VBox/Runtime/common/asm

Files:

• ASMAtomicCmpXchgU64.asm (modified) (3 diffs)
• ASMAtomicReadU64.asm (modified) (2 diffs)

trunk/src/VBox/Runtime/common/asm/ASMAtomicCmpXchgU64.asm

@@ -39 +39 @@
 ; Atomically compares and exchanges an unsigned 64-bit int.
 ;
-; @param    pu64     x86:ebp+8
-; @param    u64New   x86:ebp+c
-; @param    u64Old   x86:ebp+14
+; @param    pu64     x86:ebp+8   gcc:rdi  msc:rcx
+; @param    u64New   x86:ebp+c   gcc:rsi  msc:rdx
+; @param    u64Old   x86:ebp+14  gcc:rcx  msc:r8
 ;
 ; @returns  bool result: true if succesfully exchanged, false if not.
@@ -47 +47 @@
 ;
 BEGINPROC_EXPORTED ASMAtomicCmpXchgU64
-%ifndef RT_ARCH_X86
- %error port me
+%ifdef RT_ARCH_AMD64
+ %ifdef ASM_CALL64_MSC
+        mov     rax, r8
+        lock cmpxchg [rcx], rdx
+ %else
+        mov     rax, rcx
+        lock cmpxchg [rdi], rsi
+ %endif
+        setz    al
+        movzx   eax, al
+        ret
 %endif
+%ifdef RT_ARCH_X86
         push    ebp
         mov     ebp, esp
@@ -68 +78 @@
         leave
         ret
+%endif
 ENDPROC ASMAtomicCmpXchgU64
 

trunk/src/VBox/Runtime/common/asm/ASMAtomicReadU64.asm

@@ -45 +45 @@
 ;
 BEGINPROC_EXPORTED ASMAtomicReadU64
-%ifndef RT_ARCH_X86
- %error port me
+%ifdef RT_ARCH_AMD64
+        mfence                          ; ASSUME its present.
+ %ifdef ASM_CALL64_MSC
+        mov     rax, [rcx]
+ %else
+        mov     rax, [rdi]
+ %endif
+        ret
 %endif
+%ifdef RT_ARCH_X86
         push    ebp
         mov     ebp, esp
@@ -64 +71 @@
         leave
         ret
+%endif
 ENDPROC ASMAtomicReadU64