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.text
.align 3
.globl __gmpn_popcount
.type __gmpn_popcount,@function
__gmpn_popcount:
mov x11, #0x1fff
cmp x1, x11
b.hi .Lgt8k
.Llt8k:
movi v4.16b, #0
movi v5.16b, #0
tbz x1, #0, .Lxx0
sub x1, x1, #1
ld1 {v0.1d}, [x0], #8
cnt v6.16b, v0.16b
uadalp v4.8h, v6.16b
.Lxx0: tbz x1, #1, .Lx00
sub x1, x1, #2
ld1 {v0.2d}, [x0], #16
cnt v6.16b, v0.16b
uadalp v4.8h, v6.16b
.Lx00: tbz x1, #2, .L000
subs x1, x1, #4
ld1 {v0.2d,v1.2d}, [x0], #32
b.ls .Lsum
.Lgt4: ld1 {v2.2d,v3.2d}, [x0], #32
sub x1, x1, #4
cnt v6.16b, v0.16b
cnt v7.16b, v1.16b
b .Lmid
.L000: subs x1, x1, #8
b.lo .Le0
.Lchu: ld1 {v2.2d,v3.2d}, [x0], #32
ld1 {v0.2d,v1.2d}, [x0], #32
cnt v6.16b, v2.16b
cnt v7.16b, v3.16b
subs x1, x1, #8
b.lo .Lend
.Ltop: ld1 {v2.2d,v3.2d}, [x0], #32
uadalp v4.8h, v6.16b
cnt v6.16b, v0.16b
uadalp v5.8h, v7.16b
cnt v7.16b, v1.16b
.Lmid: ld1 {v0.2d,v1.2d}, [x0], #32
subs x1, x1, #8
uadalp v4.8h, v6.16b
cnt v6.16b, v2.16b
uadalp v5.8h, v7.16b
cnt v7.16b, v3.16b
b.hs .Ltop
.Lend: uadalp v4.8h, v6.16b
uadalp v5.8h, v7.16b
.Lsum: cnt v6.16b, v0.16b
cnt v7.16b, v1.16b
uadalp v4.8h, v6.16b
uadalp v5.8h, v7.16b
add v4.8h, v4.8h, v5.8h
.Le0: uaddlp v4.4s, v4.8h
uaddlp v4.2d, v4.4s
mov x0, v4.d[0]
mov x1, v4.d[1]
add x0, x0, x1
ret
.Lgt8k:
mov x8, x30
mov x7, x1
mov x4, #0
mov x9, #0x1ff0*8
mov x10, #0x1ff0
1: add x5, x0, x9
mov x1, #0x1ff0-8
movi v4.16b, #0
movi v5.16b, #0
bl .Lchu
add x4, x4, x0
mov x0, x5
sub x7, x7, x10
cmp x7, x11
b.hi 1b
mov x1, x7
bl .Llt8k
add x0, x4, x0
mov x30, x8
ret
.size __gmpn_popcount,.-__gmpn_popcount
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