Changeset 75129 in vbox for trunk/src/VBox/Runtime/common/string/watcom/strchr.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)
• strchr.asm (copied) (copied from trunk/src/VBox/Runtime/common/string/strchr.asm ) (2 diffs)

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

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - No-CRT strchr - AMD64 & X86.
+; IPRT - No-CRT strchr - Watcom register calling convention.
 ;
 
@@ -27 +27 @@
 %include "iprt/asmdefs.mac"
 
-BEGINCODE
+%define ASM_CALL32_WATCOM
+%define NAME(name) name %+ _
+%include "common/string/strchr.asm"
 
-;;
-; @param    psz     gcc: rdi  msc: rcx  x86:[esp+4]
-; @param    ch      gcc: esi  msc: edx  x86:[esp+8]
-RT_NOCRT_BEGINPROC strchr
-        cld
-
-        ; check for ch == 0 and setup normal strchr.
-%ifdef RT_ARCH_AMD64
- %ifdef ASM_CALL64_MSC
-        or      dl, dl
-        jz near .strlen
-        mov     r9, rsi                 ; save rsi
-        mov     rsi, rcx
- %else
-        or      sil, sil
-        jz near .strlen
-        mov     edx, esi
-        mov     rsi, rdi
- %endif
-%else
-        mov     edx, [esp + 8]
-        or      dl, dl
-        jz near .strlen
-        mov     ecx, esi                ; save esi
-        mov     esi, [esp + 4]
-%endif
-
-        ; do the search
-.next:
-        lodsb
-        cmp     al, dl
-        je      .found
-        test    al, al
-        jz      .not_found
-
-        lodsb
-        cmp     al, dl
-        je      .found
-        test    al, al
-        jz      .not_found
-
-        lodsb
-        cmp     al, dl
-        je      .found
-        test    al, al
-        jz      .not_found
-
-        lodsb
-        cmp     al, dl
-        je      .found
-        test    al, al
-        jz      .not_found
-        jmp .next
-
-.found:
-        lea     xAX, [xSI - 1]
-%ifdef ASM_CALL64_MSC
-        mov     rsi, r9
-%endif
-%ifdef RT_ARCH_X86
-        mov     esi, ecx
-%endif
-        ret
-
-.not_found:
-%ifdef ASM_CALL64_MSC
-        mov     rsi, r9
-%endif
-%ifdef RT_ARCH_X86
-        mov     esi, ecx
-%endif
-        xor     eax, eax
-        ret
-
-;
-; Special case: strchr(str, '\0');
-;
-align 16
-.strlen:
-%ifdef RT_ARCH_AMD64
- %ifdef ASM_CALL64_MSC
-        mov     r9, rdi                 ; save rdi
-        mov     rdi, rcx
- %endif
-%else
-        mov     edx, edi                ; save edi
-        mov     edi, [esp + 4]
-%endif
-        mov     xCX, -1
-        xor     eax, eax
-        repne scasb
-
-        lea     xAX, [xDI - 1]
-%ifdef ASM_CALL64_MSC
-        mov     rdi, r9
-%endif
-%ifdef RT_ARCH_X86
-        mov     edi, edx
-%endif
-        ret
-ENDPROC RT_NOCRT(strchr)
-