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750 lines
12 KiB
750 lines
12 KiB
/*
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Copyright (c) 2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef USE_AS_STRCAT
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# ifndef STRLEN
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# define STRLEN strlen_atom
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# endif
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# ifndef L
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# define L(label) .L##label
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# endif
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# ifndef cfi_startproc
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# define cfi_startproc .cfi_startproc
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# endif
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# ifndef cfi_endproc
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# define cfi_endproc .cfi_endproc
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# endif
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/* calee safe register only for strnlen is required */
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# ifdef USE_AS_STRNLEN
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# ifndef cfi_rel_offset
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# define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off
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# endif
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# ifndef cfi_restore
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# define cfi_restore(reg) .cfi_restore reg
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# endif
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# ifndef cfi_adjust_cfa_offset
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# define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off
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# endif
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# endif
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# ifndef ENTRY
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# define ENTRY(name) \
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.type name, @function; \
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.globl name; \
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.p2align 4; \
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name: \
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cfi_startproc
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# endif
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# ifndef END
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# define END(name) \
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cfi_endproc; \
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.size name, .-name
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# endif
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# define PARMS 4
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# define STR PARMS
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# define RETURN ret
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# ifdef USE_AS_STRNLEN
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# define LEN PARMS + 8
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# define CFI_PUSH(REG) \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (REG, 0)
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# define CFI_POP(REG) \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (REG)
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# define PUSH(REG) pushl REG; CFI_PUSH (REG)
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# define POP(REG) popl REG; CFI_POP (REG)
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# undef RETURN
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# define RETURN POP (%edi); ret; CFI_PUSH(%edi);
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# endif
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.text
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ENTRY (STRLEN)
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mov STR(%esp), %edx
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# ifdef USE_AS_STRNLEN
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PUSH (%edi)
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movl LEN(%esp), %edi
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sub $4, %edi
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jbe L(len_less4_prolog)
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# endif
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#endif
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xor %eax, %eax
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cmpb $0, (%edx)
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jz L(exit_tail0)
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cmpb $0, 1(%edx)
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jz L(exit_tail1)
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cmpb $0, 2(%edx)
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jz L(exit_tail2)
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cmpb $0, 3(%edx)
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jz L(exit_tail3)
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#ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less8_prolog)
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#endif
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cmpb $0, 4(%edx)
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jz L(exit_tail4)
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cmpb $0, 5(%edx)
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jz L(exit_tail5)
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cmpb $0, 6(%edx)
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jz L(exit_tail6)
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cmpb $0, 7(%edx)
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jz L(exit_tail7)
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#ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less12_prolog)
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#endif
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cmpb $0, 8(%edx)
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jz L(exit_tail8)
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cmpb $0, 9(%edx)
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jz L(exit_tail9)
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cmpb $0, 10(%edx)
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jz L(exit_tail10)
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cmpb $0, 11(%edx)
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jz L(exit_tail11)
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#ifdef USE_AS_STRNLEN
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sub $4, %edi
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jbe L(len_less16_prolog)
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#endif
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cmpb $0, 12(%edx)
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jz L(exit_tail12)
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cmpb $0, 13(%edx)
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jz L(exit_tail13)
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cmpb $0, 14(%edx)
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jz L(exit_tail14)
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cmpb $0, 15(%edx)
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jz L(exit_tail15)
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pxor %xmm0, %xmm0
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lea 16(%edx), %eax
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mov %eax, %ecx
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and $-16, %eax
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#ifdef USE_AS_STRNLEN
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and $15, %edx
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add %edx, %edi
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sub $64, %edi
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jbe L(len_less64)
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#endif
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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pxor %xmm1, %xmm1
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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pxor %xmm2, %xmm2
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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pxor %xmm3, %xmm3
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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#ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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#endif
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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#ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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#endif
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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#ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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#endif
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm2
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pmovmskb %xmm2, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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pcmpeqb (%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(exit)
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#ifdef USE_AS_STRNLEN
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mov %eax, %edx
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and $63, %edx
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add %edx, %edi
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#endif
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and $-0x40, %eax
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.p2align 4
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L(aligned_64_loop):
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#ifdef USE_AS_STRNLEN
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sub $64, %edi
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jbe L(len_less64)
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#endif
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movaps (%eax), %xmm0
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movaps 16(%eax), %xmm1
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movaps 32(%eax), %xmm2
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movaps 48(%eax), %xmm6
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pminub %xmm1, %xmm0
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pminub %xmm6, %xmm2
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pminub %xmm0, %xmm2
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pcmpeqb %xmm3, %xmm2
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pmovmskb %xmm2, %edx
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lea 64(%eax), %eax
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test %edx, %edx
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jz L(aligned_64_loop)
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pcmpeqb -64(%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea 48(%ecx), %ecx
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test %edx, %edx
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jnz L(exit)
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pcmpeqb %xmm1, %xmm3
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pmovmskb %xmm3, %edx
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lea -16(%ecx), %ecx
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test %edx, %edx
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jnz L(exit)
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pcmpeqb -32(%eax), %xmm3
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pmovmskb %xmm3, %edx
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lea -16(%ecx), %ecx
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test %edx, %edx
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jnz L(exit)
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pcmpeqb %xmm6, %xmm3
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pmovmskb %xmm3, %edx
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lea -16(%ecx), %ecx
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L(exit):
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sub %ecx, %eax
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test %dl, %dl
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jz L(exit_high)
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mov %dl, %cl
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and $15, %cl
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jz L(exit_8)
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test $0x01, %dl
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jnz L(exit_tail0)
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test $0x02, %dl
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jnz L(exit_tail1)
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test $0x04, %dl
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jnz L(exit_tail2)
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add $3, %eax
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RETURN
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.p2align 4
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L(exit_8):
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test $0x10, %dl
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jnz L(exit_tail4)
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test $0x20, %dl
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jnz L(exit_tail5)
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test $0x40, %dl
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jnz L(exit_tail6)
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add $7, %eax
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RETURN
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.p2align 4
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L(exit_high):
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mov %dh, %ch
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and $15, %ch
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jz L(exit_high_8)
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test $0x01, %dh
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jnz L(exit_tail8)
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test $0x02, %dh
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jnz L(exit_tail9)
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test $0x04, %dh
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jnz L(exit_tail10)
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add $11, %eax
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RETURN
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.p2align 4
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L(exit_high_8):
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test $0x10, %dh
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jnz L(exit_tail12)
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test $0x20, %dh
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jnz L(exit_tail13)
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test $0x40, %dh
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jnz L(exit_tail14)
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add $15, %eax
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L(exit_tail0):
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RETURN
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#ifdef USE_AS_STRNLEN
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.p2align 4
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L(len_less64):
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pxor %xmm0, %xmm0
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add $64, %edi
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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pxor %xmm1, %xmm1
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(strnlen_exit)
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sub $16, %edi
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jbe L(return_start_len)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(strnlen_exit)
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sub $16, %edi
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jbe L(return_start_len)
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pcmpeqb (%eax), %xmm0
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pmovmskb %xmm0, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(strnlen_exit)
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sub $16, %edi
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jbe L(return_start_len)
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pcmpeqb (%eax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%eax), %eax
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test %edx, %edx
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jnz L(strnlen_exit)
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#ifndef USE_AS_STRLCAT
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movl LEN(%esp), %eax
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RETURN
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#else
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jmp L(return_start_len)
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#endif
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.p2align 4
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L(strnlen_exit):
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sub %ecx, %eax
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test %dl, %dl
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jz L(strnlen_exit_high)
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mov %dl, %cl
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and $15, %cl
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jz L(strnlen_exit_8)
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test $0x01, %dl
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jnz L(exit_tail0)
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test $0x02, %dl
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jnz L(strnlen_exit_tail1)
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test $0x04, %dl
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jnz L(strnlen_exit_tail2)
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sub $4, %edi
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jb L(return_start_len)
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lea 3(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_8):
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test $0x10, %dl
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jnz L(strnlen_exit_tail4)
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test $0x20, %dl
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jnz L(strnlen_exit_tail5)
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test $0x40, %dl
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jnz L(strnlen_exit_tail6)
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sub $8, %edi
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jb L(return_start_len)
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lea 7(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_high):
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mov %dh, %ch
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and $15, %ch
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jz L(strnlen_exit_high_8)
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test $0x01, %dh
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jnz L(strnlen_exit_tail8)
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test $0x02, %dh
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jnz L(strnlen_exit_tail9)
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test $0x04, %dh
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jnz L(strnlen_exit_tail10)
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sub $12, %edi
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jb L(return_start_len)
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lea 11(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_high_8):
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test $0x10, %dh
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jnz L(strnlen_exit_tail12)
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test $0x20, %dh
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jnz L(strnlen_exit_tail13)
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test $0x40, %dh
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jnz L(strnlen_exit_tail14)
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sub $16, %edi
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jb L(return_start_len)
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lea 15(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail1):
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sub $2, %edi
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jb L(return_start_len)
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lea 1(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail2):
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sub $3, %edi
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jb L(return_start_len)
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lea 2(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail4):
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sub $5, %edi
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jb L(return_start_len)
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lea 4(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail5):
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sub $6, %edi
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jb L(return_start_len)
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lea 5(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail6):
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sub $7, %edi
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jb L(return_start_len)
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lea 6(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail8):
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sub $9, %edi
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jb L(return_start_len)
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lea 8(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail9):
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sub $10, %edi
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jb L(return_start_len)
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lea 9(%eax), %eax
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RETURN
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.p2align 4
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L(strnlen_exit_tail10):
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sub $11, %edi
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jb L(return_start_len)
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lea 10(%eax), %eax
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|
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
|
|
|
|
#ifndef USE_AS_STRLCAT
|
|
.p2align 4
|
|
L(return_start_len):
|
|
movl LEN(%esp), %eax
|
|
RETURN
|
|
#endif
|
|
|
|
/* 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 %edi, %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
|
|
|
|
L(exit_tail2):
|
|
add $2, %eax
|
|
RETURN
|
|
|
|
L(exit_tail3):
|
|
add $3, %eax
|
|
RETURN
|
|
|
|
L(exit_tail4):
|
|
add $4, %eax
|
|
RETURN
|
|
|
|
L(exit_tail5):
|
|
add $5, %eax
|
|
RETURN
|
|
|
|
L(exit_tail6):
|
|
add $6, %eax
|
|
RETURN
|
|
|
|
L(exit_tail7):
|
|
add $7, %eax
|
|
RETURN
|
|
|
|
L(exit_tail8):
|
|
add $8, %eax
|
|
RETURN
|
|
|
|
L(exit_tail9):
|
|
add $9, %eax
|
|
RETURN
|
|
|
|
L(exit_tail10):
|
|
add $10, %eax
|
|
RETURN
|
|
|
|
L(exit_tail11):
|
|
add $11, %eax
|
|
RETURN
|
|
|
|
L(exit_tail12):
|
|
add $12, %eax
|
|
RETURN
|
|
|
|
L(exit_tail13):
|
|
add $13, %eax
|
|
RETURN
|
|
|
|
L(exit_tail14):
|
|
add $14, %eax
|
|
RETURN
|
|
|
|
L(exit_tail15):
|
|
add $15, %eax
|
|
#ifndef USE_AS_STRCAT
|
|
RETURN
|
|
END (STRLEN)
|
|
#endif
|