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

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

@@ -1 +1 @@
 ; $Id$
 ;; @file
-; IPRT - No-CRT memset - AMD64 & X86.
+; IPRT - No-CRT memset - Watcom register calling convention.
 ;
 
@@ -27 +27 @@
 %include "iprt/asmdefs.mac"
 
-BEGINCODE
+%define ASM_CALL32_WATCOM
+%define NAME(name) name %+ _
+%include "common/string/memset.asm"
 
-;;
-; @param    pvDst   gcc: rdi  msc: ecx  x86:[esp+4]
-; @param    ch      gcc: esi  msc: edx  x86:[esp+8]
-; @param    cb      gcc: rdx  msc: r8   x86:[esp+0ch]
-RT_NOCRT_BEGINPROC memset
-        cld
-%ifdef RT_ARCH_AMD64
- %ifdef ASM_CALL64_MSC
-        mov     r9, rdi                 ; save rdi in r9
-        mov     rdi, rcx
-        mov     r10, rcx                ; the return value.
-        movzx   eax, dl
-        cmp     r8, 32
-        jb      .dobytes
-
-        ; eax = (al << 24) | (al << 16) | (al << 8) | al;
-        ; rdx = (eax << 32) | eax
-        movzx   edx, dl
-        mov     rax, qword 0101010101010101h
-        imul    rax, rdx
-
-        ; todo: alignment.
-        mov     rcx, r8
-        shr     rcx, 3
-        rep stosq
-
-        and     r8, 7
-.dobytes:
-        mov     rcx, r8
-        rep stosb
-
-        mov     rdi, r9                 ; restore rdi
-        mov     rax, r10
-
- %else ; GCC
-        mov     r10, rdi                ; the return value.
-        movzx   eax, sil
-        cmp     rdx, 32
-        jb      .dobytes
-
-        ; eax = (al << 24) | (al << 16) | (al << 8) | al;
-        ; rdx = (eax << 32) | eax
-        movzx   esi, sil
-        mov     rax, qword 0101010101010101h
-        imul    rax, rsi
-
-        ; todo: alignment.
-        mov     rcx, rdx
-        shr     rcx, 3
-        rep stosq
-
-        and     rdx, 7
-.dobytes:
-        mov     rcx, rdx
-        rep stosb
-
-        mov     rax, r10
- %endif ; GCC
-
-%else ; X86
-        push    edi
-
-        mov     ecx, [esp + 0ch + 4]
-        movzx   eax, byte [esp + 08h + 4]
-        mov     edi, [esp + 04h + 4]
-        cmp     ecx, 12
-        jb      .dobytes
-
-        ; eax = (al << 24) | (al << 16) | (al << 8) | al;
-        mov     ah, al
-        mov     edx, eax
-        shl     edx, 16
-        or      eax, edx
-
-        mov     edx, ecx
-        shr     ecx, 2
-        rep stosd
-
-        and     edx, 3
-        mov     ecx, edx
-.dobytes:
-        rep stosb
-
-        pop     edi
-        mov     eax, [esp + 4]
-%endif ; X86
-        ret
-ENDPROC RT_NOCRT(memset)
-