diff options
| author | PikalaxALT <pikalaxalt@gmail.com> | 2017-12-15 09:38:53 -0500 |
|---|---|---|
| committer | PikalaxALT <pikalaxalt@gmail.com> | 2017-12-15 09:39:34 -0500 |
| commit | f95a4a932476be2ba99e2fd081e8d2bc6ea12813 (patch) | |
| tree | 75f67192cb2d7b7b575c94edda318e475239b63c /newlib/libc/machine/h8300/memset.S | |
| parent | f60aca96985e68c7d8a52eb7bc955fb80e132f73 (diff) | |
Import newlib and create makefile
Diffstat (limited to 'newlib/libc/machine/h8300/memset.S')
| -rw-r--r-- | newlib/libc/machine/h8300/memset.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/newlib/libc/machine/h8300/memset.S b/newlib/libc/machine/h8300/memset.S new file mode 100644 index 0000000..c12f17b --- /dev/null +++ b/newlib/libc/machine/h8300/memset.S @@ -0,0 +1,51 @@ +#include "defines.h" + +#ifdef __H8300H__ + .h8300h +#endif + +#ifdef __H8300S__ + .h8300s +#endif + + +; A0P pointer to cursor +; A1P thing to copy + .global _memset + +_memset: + +; MOVP @(2/4,r7),A2P ; dst +; MOVP @(4/8,r7),A1 ; src thing +; MOVP @(6/12,r7),A3P ; len + + MOVP A2P,A2P + beq quit + + ; A3 points to the end of the area + MOVP A0P,A3P + ADDP A2P,A3P + + ; see if we can do it in words + ; by oring in the start of the buffer to the end address + + or A0L,A2L + btst #0,A2L + bne byteloop + + ; we can do it a word at a time + + mov.b A1L,A1H + +wordloop: + mov.w A1,@-A3P + CMPP A3P,A0P + bne wordloop +quit: rts + +byteloop: + mov.b A1L,@-A3P + CMPP A3P,A0P + bne byteloop + rts + |