Changeset 75129 in vbox for trunk/src/VBox/Runtime/common/string/watcom/strcmp.asm

Timestamp:

Oct 28, 2018 5:00:27 PM (6 years ago)

Author:

vboxsync

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

126206

Message:

IPRT: Make Watcom C an alterntive for compiling the OS/2 kernel code (GA mainly), governed by VBOX_USE_WATCOM_FOR_OS2.

Location:

trunk/src/VBox/Runtime/common/string/watcom

Files:

• . (added)
• strcmp.asm (copied) (copied from trunk/src/VBox/Runtime/common/string/strcmp.asm ) (2 diffs)

trunk/src/VBox/Runtime/common/string/watcom/strcmp.asm

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - No-CRT strcmp - AMD64 & X86.
+; IPRT - No-CRT strcmp - Watcom register calling convention.
 ;
 
@@ -27 +27 @@
 %include "iprt/asmdefs.mac"
 
-BEGINCODE
+%define ASM_CALL32_WATCOM
+%define NAME(name) name %+ _
+%include "common/string/strcmp.asm"
 
-;;
-; @param    psz1   gcc: rdi  msc: rcx  x86:[esp+4]
-; @param    psz2   gcc: rsi  msc: rdx  x86:[esp+8]
-RT_NOCRT_BEGINPROC strcmp
-        ; input
-%ifdef RT_ARCH_AMD64
- %ifdef ASM_CALL64_MSC
-  %define psz1 rcx
-  %define psz2 rdx
- %else
-  %define psz1 rdi
-  %define psz2 rsi
- %endif
-%else
-        mov     ecx, [esp + 4]
-        mov     edx, [esp + 8]
-  %define psz1 ecx
-  %define psz2 edx
-%endif
-
-        ;
-        ; The loop.
-        ;
-.next:
-        mov     al, [psz1]
-        mov     ah, [psz2]
-        cmp     al, ah
-        jne     .not_equal
-        test    al, al
-        jz      .equal
-
-        mov     al, [psz1 + 1]
-        mov     ah, [psz2 + 1]
-        cmp     al, ah
-        jne     .not_equal
-        test    al, al
-        jz      .equal
-
-        mov     al, [psz1 + 2]
-        mov     ah, [psz2 + 2]
-        cmp     al, ah
-        jne     .not_equal
-        test    al, al
-        jz      .equal
-
-        mov     al, [psz1 + 3]
-        mov     ah, [psz2 + 3]
-        cmp     al, ah
-        jne     .not_equal
-        test    al, al
-        jz      .equal
-
-        add     psz1, 4
-        add     psz2, 4
-        jmp     .next
-
-.equal:
-        xor     eax, eax
-        ret
-
-.not_equal:
-        movzx   ecx, ah
-        and     eax, 0ffh
-        sub     eax, ecx
-        ret
-ENDPROC RT_NOCRT(strcmp)
-