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.text
.align 32, 0x90
.globl __gmpn_popcount
.def __gmpn_popcount
.scl 2
.type 32
.endef
__gmpn_popcount:
push %rdi
push %rsi
mov %rcx, %rdi
mov %rdx, %rsi
push %rbx
mov $0x5555555555555555, %r10
push %rbp
mov $0x3333333333333333, %r11
lea (%rdi,%rsi,8), %rdi
mov $0x0f0f0f0f0f0f0f0f, %rcx
neg %rsi
mov $0x0101010101010101, %rdx
xor %eax, %eax
test $1, %sil
jz Ltop
mov (%rdi,%rsi,8), %r8
mov %r8, %r9
shr %r8
and %r10, %r8
sub %r8, %r9
mov %r9, %r8
shr $2, %r9
and %r11, %r8
and %r11, %r9
add %r8, %r9
dec %rsi
jmp Lmid
.align 16, 0x90
Ltop: mov (%rdi,%rsi,8), %r8
mov 8(%rdi,%rsi,8), %rbx
mov %r8, %r9
mov %rbx, %rbp
shr %r8
shr %rbx
and %r10, %r8
and %r10, %rbx
sub %r8, %r9
sub %rbx, %rbp
mov %r9, %r8
mov %rbp, %rbx
shr $2, %r9
shr $2, %rbp
and %r11, %r8
and %r11, %r9
and %r11, %rbx
and %r11, %rbp
add %r8, %r9
add %rbx, %rbp
add %rbp, %r9
Lmid: mov %r9, %r8
shr $4, %r9
and %rcx, %r8
and %rcx, %r9
add %r8, %r9
imul %rdx, %r9
shr $56, %r9
add %r9, %rax
add $2, %rsi
jnc Ltop
Lend:
pop %rbp
pop %rbx
pop %rsi
pop %rdi
ret
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