Changeset 82601 in vbox

Timestamp:

Dec 16, 2019 8:42:46 PM (5 years ago)

Author:

vboxsync

Message:

IPRT: Added an assembly implementation of ASMAddFlags. bugref:9627

Location:

trunk/src/VBox/Runtime

Files:

• Makefile.kmk (modified) (1 diff)
• common/asm/ASMAddFlags.asm (copied) (copied from trunk/src/VBox/Runtime/common/asm/ASMSetFlags.asm ) (2 diffs)

trunk/src/VBox/Runtime/Makefile.kmk

@@ -200 +200 @@
         win/amd64/ASMProbeReadByte.asm \
         common/asm/ASMSetFlags.asm \
+        common/asm/ASMAddFlags.asm \
         win/amd64/ASMGetDR0.asm \
         win/amd64/ASMGetDR1.asm \

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

@@ -34 +34 @@
 
 ;;
-; @param rcx  eflags
-BEGINPROC_EXPORTED ASMSetFlags
+; @param rcx/rdi  eflags to add
+BEGINPROC_EXPORTED ASMAddFlags
 %if    ARCH_BITS == 64
+        pushfq
+        mov     rax, [rsp]
  %ifdef ASM_CALL64_GCC
-        push    rdi
+        or      rdi, rax
+        mov     [rsp], rdi
  %else
-        push    rcx
+        or      rcx, rax
+        mov     [rsp], rcx
  %endif
         popfq
 %elif  ARCH_BITS == 32
-        push    dword [esp + 4]
+        mov     ecx, [esp + 4]
+        pushfd
+        mov     eax, [esp]
+        or      ecx, eax
+        mov     [esp], ecx
         popfd
 %elif  ARCH_BITS == 16
         push    bp
         mov     bp, sp
+        pushf
+        pop     ax
         push    word [bp + 2 + 2]
+        or      [bp - 2], ax
         popf
         leave
@@ -56 +67 @@
 %endif
         ret
-ENDPROC ASMSetFlags
+ENDPROC ASMAddFlags