kmemset and kmemcpy cdecl16 versions

This commit is contained in:
2024-10-04 09:53:01 -04:00
parent 4ee766304b
commit 63e6f1fac8

View File

@@ -17,37 +17,35 @@
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE ; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
; SOFTWARE. ; SOFTWARE.
%include 'cdecl16.inc'
; uint8_t* kmemset(void* dest, uint8_t val, size_t len); ; uint8_t* kmemset(void* dest, uint8_t val, uint8_t len);
kmemset: kmemset:
push di ; function uses di, so save it. __CDECL16_ENTRY
.func:
mov cx, [bp - 2] ; size_t len mov cx, [bp + 8] ; size_t len
mov al, [bp - 4] ; uint8_t val mov al, [bp + 6] ; uint8_t val
mov di, [bp - 6] ; void * ptr mov di, [bp + 4] ; void * ptr
cld cld
rep stosb rep stosb
.endf: mov ax, di ; return pointer to dest
mov ax, [bp - 6] ; return pointer to dest .endp:
pop di ; restore di __CDECL16_EXIT
ret ret
; uint8_t* kmemset(uint8_t* dest, uint8_t* src, size_t len); ; uint8_t* kmemset(uint8_t* dest, uint8_t* src, uint8_t len);
; not overlap safe ; not overlap safe
kmemcpy: kmemcpy:
push di __CDECL16_ENTRY
push si ; di, si are callee save .func:
mov cx, [bp + 8] ; len
mov cx, [bp - 2] ; length mov si, [bp + 6] ; src
mov si, [bp - 4] ; source mov di, [bp + 4] ; dest
mov di, [bp - 6] ; dest
cld ; ensure we are incrementing cld ; ensure we are incrementing
rep movsb rep movsb
mov ax, di ; return pointer to dest
.endf: .endf:
mov ax, [bp - 6] ; return pointer to dest __CDECL16_EXIT
pop si
pop di
ret ret