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.text
.align 3
.globl ___gmpn_hamdist
___gmpn_hamdist:
mov x11, #0x1fff
cmp x2, x11
b.hi Lgt8k
Llt8k:
movi v4.16b, #0
movi v5.16b, #0
tbz x2, #0, Lxx0
sub x2, x2, #1
ld1 {v0.1d}, [x0], #8
ld1 {v16.1d}, [x1], #8
eor v0.16b, v0.16b, v16.16b
cnt v6.16b, v0.16b
uadalp v4.8h, v6.16b
Lxx0: tbz x2, #1, Lx00
sub x2, x2, #2
ld1 {v0.2d}, [x0], #16
ld1 {v16.2d}, [x1], #16
eor v0.16b, v0.16b, v16.16b
cnt v6.16b, v0.16b
uadalp v4.8h, v6.16b
Lx00: tbz x2, #2, L000
subs x2, x2, #4
ld1 {v0.2d,v1.2d}, [x0], #32
ld1 {v16.2d,v17.2d}, [x1], #32
b.ls Lsum
Lgt4: ld1 {v2.2d,v3.2d}, [x0], #32
ld1 {v18.2d,v19.2d}, [x1], #32
eor v0.16b, v0.16b, v16.16b
eor v1.16b, v1.16b, v17.16b
sub x2, x2, #4
cnt v6.16b, v0.16b
cnt v7.16b, v1.16b
b Lmid
L000: subs x2, x2, #8
b.lo Le0
Lchu: ld1 {v2.2d,v3.2d}, [x0], #32
ld1 {v0.2d,v1.2d}, [x0], #32
ld1 {v18.2d,v19.2d}, [x1], #32
ld1 {v16.2d,v17.2d}, [x1], #32
eor v2.16b, v2.16b, v18.16b
eor v3.16b, v3.16b, v19.16b
cnt v6.16b, v2.16b
cnt v7.16b, v3.16b
subs x2, x2, #8
b.lo Lend
Ltop: ld1 {v2.2d,v3.2d}, [x0], #32
ld1 {v18.2d,v19.2d}, [x1], #32
eor v0.16b, v0.16b, v16.16b
eor v1.16b, v1.16b, v17.16b
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
ld1 {v16.2d,v17.2d}, [x1], #32
eor v2.16b, v2.16b, v18.16b
eor v3.16b, v3.16b, v19.16b
subs x2, x2, #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: eor v0.16b, v0.16b, v16.16b
eor v1.16b, v1.16b, v17.16b
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, x2
mov x4, #0
mov x9, #0x1ff0*8
mov x10, #0x1ff0
1: add x5, x0, x9
add x6, x1, x9
mov x2, #0x1ff0-8
movi v4.16b, #0
movi v5.16b, #0
bl Lchu
add x4, x4, x0
mov x0, x5
mov x1, x6
sub x7, x7, x10
cmp x7, x11
b.hi 1b
mov x2, x7
bl Llt8k
add x0, x4, x0
mov x30, x8
ret
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