diff options
Diffstat (limited to 'sysdeps/i386/i686/multiarch/strlen-sse2.S')
| -rw-r--r-- | sysdeps/i386/i686/multiarch/strlen-sse2.S | 440 |
1 files changed, 400 insertions, 40 deletions
diff --git a/sysdeps/i386/i686/multiarch/strlen-sse2.S b/sysdeps/i386/i686/multiarch/strlen-sse2.S index 2dbc4a9..91b6d79 100644 --- a/sysdeps/i386/i686/multiarch/strlen-sse2.S +++ b/sysdeps/i386/i686/multiarch/strlen-sse2.S @@ -18,29 +18,46 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -#if (defined USE_AS_STRCAT || defined SHARED) && !defined NOT_IN_libc +/* for strlen only SHARED version is optimized, for strcat, strncat, strnlen both STATIC and SHARED are optimized */ + +#if (defined USE_AS_STRNLEN || defined USE_AS_STRCAT || defined SHARED) && !defined NOT_IN_libc + # ifndef USE_AS_STRCAT # include <sysdep.h> -# define CFI_PUSH(REG) \ +# define PARMS 4 +# define STR PARMS +# define RETURN ret + +# ifdef USE_AS_STRNLEN +# define LEN PARMS + 8 +# define CFI_PUSH(REG) \ cfi_adjust_cfa_offset (4); \ cfi_rel_offset (REG, 0) -# define CFI_POP(REG) \ +# define CFI_POP(REG) \ cfi_adjust_cfa_offset (-4); \ cfi_restore (REG) -# define PUSH(REG) pushl REG; CFI_PUSH (REG) -# define POP(REG) popl REG; CFI_POP (REG) -# define PARMS 4 -# define STR PARMS -# define ENTRANCE -# define RETURN ret +# define PUSH(REG) pushl REG; CFI_PUSH (REG) +# define POP(REG) popl REG; CFI_POP (REG) +# undef RETURN +# define RETURN POP (%edi); CFI_PUSH(%edi); ret +# endif + +# ifndef STRLEN +# define STRLEN __strlen_sse2 +# endif atom_text_section -ENTRY (__strlen_sse2) - ENTRANCE +ENTRY (STRLEN) mov STR(%esp), %edx +# ifdef USE_AS_STRNLEN + PUSH (%edi) + movl LEN(%esp), %edi + sub $4, %edi + jbe L(len_less4_prolog) +# endif # endif xor %eax, %eax cmpb $0, (%edx) @@ -51,6 +68,12 @@ ENTRY (__strlen_sse2) jz L(exit_tail2) cmpb $0, 3(%edx) jz L(exit_tail3) + +# ifdef USE_AS_STRNLEN + sub $4, %edi + jbe L(len_less8_prolog) +# endif + cmpb $0, 4(%edx) jz L(exit_tail4) cmpb $0, 5(%edx) @@ -59,6 +82,12 @@ ENTRY (__strlen_sse2) jz L(exit_tail6) cmpb $0, 7(%edx) jz L(exit_tail7) + +# ifdef USE_AS_STRNLEN + sub $4, %edi + jbe L(len_less12_prolog) +# endif + cmpb $0, 8(%edx) jz L(exit_tail8) cmpb $0, 9(%edx) @@ -67,6 +96,12 @@ ENTRY (__strlen_sse2) jz L(exit_tail10) cmpb $0, 11(%edx) jz L(exit_tail11) + +# ifdef USE_AS_STRNLEN + sub $4, %edi + jbe L(len_less16_prolog) +# endif + cmpb $0, 12(%edx) jz L(exit_tail12) cmpb $0, 13(%edx) @@ -75,11 +110,18 @@ ENTRY (__strlen_sse2) jz L(exit_tail14) cmpb $0, 15(%edx) jz L(exit_tail15) + pxor %xmm0, %xmm0 - mov %edx, %eax - lea 16(%edx), %ecx + lea 16(%edx), %eax + mov %eax, %ecx and $-16, %eax - add $16, %eax + +# ifdef USE_AS_STRNLEN + and $15, %edx + add %edx, %edi + sub $64, %edi + jbe L(len_less64) +# endif pcmpeqb (%eax), %xmm0 pmovmskb %xmm0, %edx @@ -95,7 +137,6 @@ ENTRY (__strlen_sse2) lea 16(%eax), %eax jnz L(exit) - pcmpeqb (%eax), %xmm2 pmovmskb %xmm2, %edx pxor %xmm3, %xmm3 @@ -109,6 +150,11 @@ ENTRY (__strlen_sse2) lea 16(%eax), %eax jnz L(exit) +# ifdef USE_AS_STRNLEN + sub $64, %edi + jbe L(len_less64) +# endif + pcmpeqb (%eax), %xmm0 pmovmskb %xmm0, %edx test %edx, %edx @@ -133,6 +179,11 @@ ENTRY (__strlen_sse2) lea 16(%eax), %eax jnz L(exit) +# ifdef USE_AS_STRNLEN + sub $64, %edi + jbe L(len_less64) +# endif + pcmpeqb (%eax), %xmm0 pmovmskb %xmm0, %edx test %edx, %edx @@ -157,6 +208,11 @@ ENTRY (__strlen_sse2) lea 16(%eax), %eax jnz L(exit) +# ifdef USE_AS_STRNLEN + sub $64, %edi + jbe L(len_less64) +# endif + pcmpeqb (%eax), %xmm0 pmovmskb %xmm0, %edx test %edx, %edx @@ -181,8 +237,20 @@ ENTRY (__strlen_sse2) lea 16(%eax), %eax jnz L(exit) +# ifdef USE_AS_STRNLEN + mov %eax, %edx + and $63, %edx + add %edx, %edi +# endif + and $-0x40, %eax -L(aligned_64): + + .p2align 4 +L(aligned_64_loop): +# ifdef USE_AS_STRNLEN + sub $64, %edi + jbe L(len_less64) +# endif movaps (%eax), %xmm0 movaps 16(%eax), %xmm1 movaps 32(%eax), %xmm2 @@ -194,7 +262,7 @@ L(aligned_64): pmovmskb %xmm2, %edx test %edx, %edx lea 64(%eax), %eax - jz L(aligned_64) + jz L(aligned_64_loop) pcmpeqb -64(%eax), %xmm3 pmovmskb %xmm3, %edx @@ -221,56 +289,348 @@ L(exit): sub %ecx, %eax test %dl, %dl jz L(exit_high) + + mov %dl, %cl + and $15, %cl + jz L(exit_8) test $0x01, %dl jnz L(exit_tail0) - test $0x02, %dl jnz L(exit_tail1) - test $0x04, %dl jnz L(exit_tail2) + add $3, %eax + RETURN - test $0x08, %dl - jnz L(exit_tail3) - + .p2align 4 +L(exit_8): test $0x10, %dl jnz L(exit_tail4) - test $0x20, %dl jnz L(exit_tail5) - test $0x40, %dl jnz L(exit_tail6) add $7, %eax -L(exit_tail0): RETURN + .p2align 4 L(exit_high): - add $8, %eax + mov %dh, %ch + and $15, %ch + jz L(exit_high_8) test $0x01, %dh + jnz L(exit_tail8) + test $0x02, %dh + jnz L(exit_tail9) + test $0x04, %dh + jnz L(exit_tail10) + add $11, %eax + RETURN + + .p2align 4 +L(exit_high_8): + test $0x10, %dh + jnz L(exit_tail12) + test $0x20, %dh + jnz L(exit_tail13) + test $0x40, %dh + jnz L(exit_tail14) + add $15, %eax +L(exit_tail0): + RETURN + +# ifdef USE_AS_STRNLEN + + .p2align 4 +L(len_less64): + pxor %xmm0, %xmm0 + add $64, %edi + + pcmpeqb (%eax), %xmm0 + pmovmskb %xmm0, %edx + pxor %xmm1, %xmm1 + lea 16(%eax), %eax + test %edx, %edx + jnz L(strnlen_exit) + + sub $16, %edi + jbe L(return_start_len) + + pcmpeqb (%eax), %xmm1 + pmovmskb %xmm1, %edx + lea 16(%eax), %eax + test %edx, %edx + jnz L(strnlen_exit) + + sub $16, %edi + jbe L(return_start_len) + + pcmpeqb (%eax), %xmm0 + pmovmskb %xmm0, %edx + lea 16(%eax), %eax + test %edx, %edx + jnz L(strnlen_exit) + + sub $16, %edi + jbe L(return_start_len) + + pcmpeqb (%eax), %xmm1 + pmovmskb %xmm1, %edx + lea 16(%eax), %eax + test %edx, %edx + jnz L(strnlen_exit) + + movl LEN(%esp), %eax + RETURN + + .p2align 4 +L(strnlen_exit): + sub %ecx, %eax + + test %dl, %dl + jz L(strnlen_exit_high) + mov %dl, %cl + and $15, %cl + jz L(strnlen_exit_8) + test $0x01, %dl jnz L(exit_tail0) + test $0x02, %dl + jnz L(strnlen_exit_tail1) + test $0x04, %dl + jnz L(strnlen_exit_tail2) + sub $4, %edi + jb L(return_start_len) + lea 3(%eax), %eax + RETURN - test $0x02, %dh - jnz L(exit_tail1) + .p2align 4 +L(strnlen_exit_8): + test $0x10, %dl + jnz L(strnlen_exit_tail4) + test $0x20, %dl + jnz L(strnlen_exit_tail5) + test $0x40, %dl + jnz L(strnlen_exit_tail6) + sub $8, %edi + jb L(return_start_len) + lea 7(%eax), %eax + RETURN + .p2align 4 +L(strnlen_exit_high): + mov %dh, %ch + and $15, %ch + jz L(strnlen_exit_high_8) + test $0x01, %dh + jnz L(strnlen_exit_tail8) + test $0x02, %dh + jnz L(strnlen_exit_tail9) test $0x04, %dh - jnz L(exit_tail2) - - test $0x08, %dh - jnz L(exit_tail3) + jnz L(strnlen_exit_tail10) + sub $12, %edi + jb L(return_start_len) + lea 11(%eax), %eax + RETURN + .p2align 4 +L(strnlen_exit_high_8): test $0x10, %dh - jnz L(exit_tail4) - + jnz L(strnlen_exit_tail12) test $0x20, %dh - jnz L(exit_tail5) - + jnz L(strnlen_exit_tail13) test $0x40, %dh - jnz L(exit_tail6) - add $7, %eax + jnz L(strnlen_exit_tail14) + sub $16, %edi + jb L(return_start_len) + lea 15(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail1): + sub $2, %edi + jb L(return_start_len) + lea 1(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail2): + sub $3, %edi + jb L(return_start_len) + lea 2(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail4): + sub $5, %edi + jb L(return_start_len) + lea 4(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail5): + sub $6, %edi + jb L(return_start_len) + lea 5(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail6): + sub $7, %edi + jb L(return_start_len) + lea 6(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail8): + sub $9, %edi + jb L(return_start_len) + lea 8(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail9): + sub $10, %edi + jb L(return_start_len) + lea 9(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail10): + sub $11, %edi + jb L(return_start_len) + lea 10(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail12): + sub $13, %edi + jb L(return_start_len) + lea 12(%eax), %eax + RETURN + + .p2align 4 +L(strnlen_exit_tail13): + sub $14, %edi + jb L(return_start_len) + lea 13(%eax), %eax RETURN .p2align 4 +L(strnlen_exit_tail14): + sub $15, %edi + jb L(return_start_len) + lea 14(%eax), %eax + RETURN + + .p2align 4 +L(return_start_len): + movl LEN(%esp), %eax + RETURN + +/* for prolog only */ + + .p2align 4 +L(len_less4_prolog): + xor %eax, %eax + + add $4, %edi + jz L(exit_tail0) + + cmpb $0, (%edx) + jz L(exit_tail0) + cmp $1, %edi + je L(exit_tail1) + + cmpb $0, 1(%edx) + jz L(exit_tail1) + cmp $2, %edi + je L(exit_tail2) + + cmpb $0, 2(%edx) + jz L(exit_tail2) + cmp $3, %edi + je L(exit_tail3) + + cmpb $0, 3(%edx) + jz L(exit_tail3) + mov $4, %eax + RETURN + + .p2align 4 +L(len_less8_prolog): + add $4, %edi + + cmpb $0, 4(%edx) + jz L(exit_tail4) + cmp $1, %edi + je L(exit_tail5) + + cmpb $0, 5(%edx) + jz L(exit_tail5) + cmp $2, %edi + je L(exit_tail6) + + cmpb $0, 6(%edx) + jz L(exit_tail6) + cmp $3, %edi + je L(exit_tail7) + + cmpb $0, 7(%edx) + jz L(exit_tail7) + mov $8, %eax + RETURN + + + .p2align 4 +L(len_less12_prolog): + add $4, %edi + + cmpb $0, 8(%edx) + jz L(exit_tail8) + cmp $1, %edi + je L(exit_tail9) + + cmpb $0, 9(%edx) + jz L(exit_tail9) + cmp $2, %edi + je L(exit_tail10) + + cmpb $0, 10(%edx) + jz L(exit_tail10) + cmp $3, %edi + je L(exit_tail11) + + cmpb $0, 11(%edx) + jz L(exit_tail11) + mov $12, %eax + RETURN + + .p2align 4 +L(len_less16_prolog): + add $4, %edi + + cmpb $0, 12(%edx) + jz L(exit_tail12) + cmp $1, %edi + je L(exit_tail13) + + cmpb $0, 13(%edx) + jz L(exit_tail13) + cmp $2, %edi + je L(exit_tail14) + + cmpb $0, 14(%edx) + jz L(exit_tail14) + cmp $3, %edi + je L(exit_tail15) + + cmpb $0, 15(%edx) + jz L(exit_tail15) + mov $16, %eax + RETURN +# endif + + .p2align 4 L(exit_tail1): add $1, %eax RETURN @@ -330,7 +690,7 @@ L(exit_tail14): L(exit_tail15): add $15, %eax # ifndef USE_AS_STRCAT - ret -END (__strlen_sse2) + RETURN +END (STRLEN) # endif #endif |