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| author | Leandro Lupori <luporl@FreeBSD.org> | 2021-03-25 16:14:00 +0000 |
|---|---|---|
| committer | Leandro Lupori <luporl@FreeBSD.org> | 2021-03-25 16:20:12 +0000 |
| commit | 9f50aa45be18b9b11b14345fe0a137d1ac51a391 (patch) | |
| tree | f2f2f753afb7f329c992f69047a4fe80a92afffc | |
| parent | 7595394130a163b7ff53d9ef3f28fcb87f629d17 (diff) | |
| download | src-9f50aa45be18b9b11b14345fe0a137d1ac51a391.tar.gz src-9f50aa45be18b9b11b14345fe0a137d1ac51a391.zip | |
[PowerPC64] Port optimized strcpy to PPC64LE
Submitted by: Bruno Larsen <bruno.larsen@eldorado.org.br>
Reviewed by: luporl, bdragon (IRC)
MFC after: 1 week
Sponsored by: Eldorado Research Institute (eldorado.org.br)
Differential Revision: https://reviews.freebsd.org/D29067
| -rw-r--r-- | lib/libc/powerpc64/string/Makefile.inc | 7 | ||||
| -rw-r--r-- | lib/libc/powerpc64/string/strcpy_arch_2_05.S | 66 |
2 files changed, 64 insertions, 9 deletions
diff --git a/lib/libc/powerpc64/string/Makefile.inc b/lib/libc/powerpc64/string/Makefile.inc index 14f0845595c9..486ca47a44be 100644 --- a/lib/libc/powerpc64/string/Makefile.inc +++ b/lib/libc/powerpc64/string/Makefile.inc @@ -12,12 +12,7 @@ MDSRCS+= \ memmove_resolver.c \ strncpy_arch_2_05.S \ strncpy.c \ - strncpy_resolver.c - -# XXX Port strcpy to LE. -.if ${MACHINE_ARCH} == "powerpc64" -MDSRCS+= \ + strncpy_resolver.c \ strcpy_arch_2_05.S \ strcpy.c \ strcpy_resolver.c -.endif diff --git a/lib/libc/powerpc64/string/strcpy_arch_2_05.S b/lib/libc/powerpc64/string/strcpy_arch_2_05.S index 23ffb5c2a75e..7f42fd813395 100644 --- a/lib/libc/powerpc64/string/strcpy_arch_2_05.S +++ b/lib/libc/powerpc64/string/strcpy_arch_2_05.S @@ -26,9 +26,6 @@ * SUCH DAMAGE. */ -#if !defined(__BIG_ENDIAN__) -#error "Optimized SRTCPY is only supported by big-endian architecture!" -#endif #include <machine/asm.h> __FBSDID("$FreeBSD$"); @@ -71,6 +68,7 @@ ENTRY(__strcpy_arch_2_05) beq cr7,.Lcopy_dw_loop addi %r8,%r8,8 /* Forward r8 to use std instruction. */ +#if defined(__BIG_ENDIAN__) /* Find where the zero is located. */ .Lcheck_zero: rldicr. %r5,%r0,0,7 @@ -136,6 +134,68 @@ ENTRY(__strcpy_arch_2_05) .Lfound_on_byte_0: srdi %r6,%r0,56 stb %r6,0(%r8) +#elif defined(__LITTLE_ENDIAN__) +/* Find where the zero is located. */ +.Lcheck_zero: + andi. %r7,%r0,0xff + beq .Lfound_on_byte_0 + andi. %r7,%r0,0xff00 + beq .Lfound_on_byte_1 + andis. %r7,%r0,0xff + beq .Lfound_on_byte_2 + andis. %r7,%r0,0xff00 + beq .Lfound_on_byte_3 + rldicr. %r7,%r0,24,7 + beq .Lfound_on_byte_4 + rldicr. %r7,%r0,16,7 + beq .Lfound_on_byte_5 + rldicr. %r7,%r0,8,7 + beq .Lfound_on_byte_6 + +/* Copy the last string bytes according to the string end position. */ +.Lfound_on_byte_7: + std %r0,0(%r8) + b .Lexit + +.Lfound_on_byte_6: + stw %r0,0(%r8) + srdi %r6,%r0,32 + sth %r6,4(%r8) + srdi %r6,%r0,48 + stb %r6,6(%r8) + b .Lexit + +.Lfound_on_byte_5: + stw %r0,0(%r8) + srdi %r6,%r0,32 + sth %r6,4(%r8) + b .Lexit + +.Lfound_on_byte_4: + stw %r0,0(%r8) + srdi %r6,%r0,32 + stb %r6,4(%r8) + b .Lexit + +.Lfound_on_byte_3: + stw %r0,0(%r8) + b .Lexit + +.Lfound_on_byte_2: + sth %r0,0(%r8) + srdi %r6,%r0,16 + stb %r6,2(%r8) + b .Lexit + +.Lfound_on_byte_1: + sth %r0,0(%r8) + b .Lexit + +.Lfound_on_byte_0: + stb %r0,0(%r8) +#else +#error "Unable to determine Endianness" +#endif .Lexit: blr |