diff options
| author | Pavel Kozlov <pavel.kozlov@synopsys.com> | 2022-10-07 13:43:45 +0400 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2022-10-14 09:47:02 +0200 |
| commit | 663b8a0497c40a20668258bd69db13924c569c41 (patch) | |
| tree | c494a97dedbfa9ae8aa72b3c7f25b05490ec8130 /libc/sysdeps | |
| parent | de6be7bc60f190a0d746945a3a5a143bc93a1a65 (diff) | |
arc: add optimized string functions for ARCv3
Add ability to use optimized versions of string functions for ARCv3 32-bit
CPUs with UCLIBC_HAS_STRING_ARCH_OPT option. Add optimized
memcpy/memset/memcmp code for ARCv3 CPUs based on the code from newlib
and adapt for ARCv3 existed optimized strchr/strcmp/strcpy/strlen.
Link to the Synopsys newlib repo with code for ARCv3 on GitHub:
https://github.com/foss-for-synopsys-dwc-arc-processors/newlib
Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com>
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/arc/asm.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arc/asm.h b/libc/sysdeps/linux/arc/asm.h index f15dff841..f83075ea1 100644 --- a/libc/sysdeps/linux/arc/asm.h +++ b/libc/sysdeps/linux/arc/asm.h @@ -7,6 +7,13 @@ #ifndef _ARC_ASM_H #define _ARC_ASM_H +/* + * Some 16-bit instructions were excluded from the ARCv3 ISA + * the following macros are introduced to handle these changes in one place. + * This will allow not to change existing ARCv2 code and use 16-bit versions + * of instructions for ARCv2 and replace them with 32-bit vesrions for ARCv3 + */ + #if defined (__ARC64_ARCH32__) .macro PUSHR reg @@ -25,6 +32,22 @@ pop \reg .endm +.macro SUBR_S dst,src1,src2 + sub \dst, \src1, \src2 +.endm + +.macro ADDR_S dst,src1,src2 + add \dst, \src1, \src2 +.endm + +.macro ASRR_S dst,src1,src2 + asr \dst, \src1, \src2 +.endm + +.macro ASLR_S dst,src1,src2 + asl \dst, \src1, \src2 +.endm + #elif defined (__ARC64_ARCH64__) # error ARCv3 64-bit is not supported by uClibc-ng @@ -47,6 +70,22 @@ pop_s \reg .endm +.macro SUBR_S dst,src1,src2 + sub_s \dst, \src1, \src2 +.endm + +.macro ADDR_S dst,src1,src2 + add_s \dst, \src1, \src2 +.endm + +.macro ASRR_S dst,src1,src2 + asr_s \dst, \src1, \src2 +.endm + +.macro ASLR_S dst,src1,src2 + asl_s \dst, \src1, \src2 +.endm + #endif #endif /* _ARC_ASM_H */ |