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head/lib/libc/amd64/string/memset.S
| Show All 35 Lines | |||||
| .macro MEMSET erms | .macro MEMSET erms | ||||
| movq %rdi,%rax | movq %rdi,%rax | ||||
| movq %rdx,%rcx | movq %rdx,%rcx | ||||
| movzbq %sil,%r8 | movzbq %sil,%r8 | ||||
| movabs $0x0101010101010101,%r10 | movabs $0x0101010101010101,%r10 | ||||
| imulq %r8,%r10 | imulq %r8,%r10 | ||||
| cmpq $32,%rcx | cmpq $32,%rcx | ||||
| jb 1016f | jbe 101632f | ||||
| cmpq $256,%rcx | cmpq $256,%rcx | ||||
| ja 1256f | ja 1256f | ||||
| 1032: | 103200: | ||||
| movq %r10,(%rdi) | movq %r10,(%rdi) | ||||
| movq %r10,8(%rdi) | movq %r10,8(%rdi) | ||||
| movq %r10,16(%rdi) | movq %r10,16(%rdi) | ||||
| movq %r10,24(%rdi) | movq %r10,24(%rdi) | ||||
| leaq 32(%rdi),%rdi | leaq 32(%rdi),%rdi | ||||
| subq $32,%rcx | subq $32,%rcx | ||||
| cmpq $32,%rcx | cmpq $32,%rcx | ||||
| jae 1032b | ja 103200b | ||||
| cmpb $0,%cl | |||||
| je 1000f | |||||
| 1016: | |||||
| cmpb $16,%cl | cmpb $16,%cl | ||||
| jl 1008f | ja 201632f | ||||
| movq %r10,-16(%rdi,%rcx) | |||||
| movq %r10,-8(%rdi,%rcx) | |||||
| ret | |||||
| ALIGN_TEXT | |||||
| 101632: | |||||
| cmpb $16,%cl | |||||
| jl 100816f | |||||
| 201632: | |||||
| movq %r10,(%rdi) | movq %r10,(%rdi) | ||||
| movq %r10,8(%rdi) | movq %r10,8(%rdi) | ||||
| subb $16,%cl | movq %r10,-16(%rdi,%rcx) | ||||
| jz 1000f | movq %r10,-8(%rdi,%rcx) | ||||
| leaq 16(%rdi),%rdi | ret | ||||
| 1008: | ALIGN_TEXT | ||||
| 100816: | |||||
| cmpb $8,%cl | cmpb $8,%cl | ||||
| jl 1004f | jl 100408f | ||||
| movq %r10,(%rdi) | movq %r10,(%rdi) | ||||
| subb $8,%cl | movq %r10,-8(%rdi,%rcx) | ||||
| jz 1000f | ret | ||||
| leaq 8(%rdi),%rdi | ALIGN_TEXT | ||||
| 1004: | 100408: | ||||
| cmpb $4,%cl | cmpb $4,%cl | ||||
| jl 1002f | jl 100204f | ||||
| movl %r10d,(%rdi) | movl %r10d,(%rdi) | ||||
| subb $4,%cl | movl %r10d,-4(%rdi,%rcx) | ||||
| jz 1000f | ret | ||||
| leaq 4(%rdi),%rdi | ALIGN_TEXT | ||||
| 1002: | 100204: | ||||
| cmpb $2,%cl | cmpb $2,%cl | ||||
| jl 1001f | jl 100001f | ||||
| movw %r10w,(%rdi) | movw %r10w,(%rdi) | ||||
| subb $2,%cl | movw %r10w,-2(%rdi,%rcx) | ||||
| jz 1000f | ret | ||||
| leaq 2(%rdi),%rdi | ALIGN_TEXT | ||||
| 1001: | 100001: | ||||
| cmpb $1,%cl | cmpb $0,%cl | ||||
| jl 1000f | je 100000f | ||||
| movb %r10b,(%rdi) | movb %r10b,(%rdi) | ||||
| 1000: | 100000: | ||||
| ret | ret | ||||
| ALIGN_TEXT | ALIGN_TEXT | ||||
| 1256: | 1256: | ||||
| movq %rdi,%r9 | movq %rdi,%r9 | ||||
| movq %r10,%rax | movq %r10,%rax | ||||
| testl $15,%edi | testl $15,%edi | ||||
| jnz 3f | jnz 3f | ||||
| 1: | 1: | ||||
| Show All 20 Lines | 3: | ||||
| movq %r10,8(%rdi) | movq %r10,8(%rdi) | ||||
| movq %rdi,%r8 | movq %rdi,%r8 | ||||
| andq $15,%r8 | andq $15,%r8 | ||||
| leaq -16(%rcx,%r8),%rcx | leaq -16(%rcx,%r8),%rcx | ||||
| neg %r8 | neg %r8 | ||||
| leaq 16(%rdi,%r8),%rdi | leaq 16(%rdi,%r8),%rdi | ||||
| jmp 1b | jmp 1b | ||||
| .endm | .endm | ||||
| ENTRY(memset) | ENTRY(memset) | ||||
| MEMSET erms=0 | MEMSET erms=0 | ||||
| END(memset) | END(memset) | ||||
| .section .note.GNU-stack,"",%progbits | .section .note.GNU-stack,"",%progbits | ||||