ASM generated by a slow parity algorithm

fast_parity.s

hamming_code_simd::hamming::fast_parity (src/hamming.rs:66):
 eor     x8, x0, x0, lsr, #1
 eor     x8, x8, x8, lsr, #2
 eor     x8, x8, x8, lsr, #4
 eor     x8, x8, x8, lsr, #8
 eor     x8, x8, x8, lsr, #16
 lsr     x9, x8, #32
 eor     w8, w9, w8
 and     x0, x8, #0x1
 ret

parity.s

 pub fn parity(code: &u64, i: u32) -> bool {
 mov     w9, #1
 let bi = (0b1 << i) - 1;
 lsl     w8, w9, w1
 sub     w10, w8, #1
     cmp     w10, #63
     b.gt    LBB2_3
     mov     w12, #0
     mov     w10, #0
     ldr     x11, [x0]
     sub     w13, w8, #2
     mov     w9, #1
LBB2_2:
     add     w13, w13, #1
 if !ignore && (code & 0b1 << j) != 0b0 {
 lsr     x14, x11, x13
 and     w14, w14, #0x1
 eor     w14, w9, w14
 tst     w12, #0x1
 csel    w9, w9, w14, ne
 counter += 1;
 add     w14, w10, #1
 if counter >= 0b1 << i {
 cmp     w14, w8
 cset    w14, lt
 if counter >= 0b1 << i {
 csinc   w10, wzr, w10, ge
 eor     w12, w14, w12
 eor     w12, w12, #0x1
     cmp     w13, #63
     b.lt    LBB2_2
LBB2_3:
 }
 and     w0, w9, #0x1
 ret

slow_parity.s

hamming_code_simd::hamming::slow_parity (src/hamming.rs:78):
 dup.2d  v0, x0
Lloh78:
 adrp    x8, lCPI3_0@PAGE
Lloh79:
 ldr     q1, [x8, lCPI3_0@PAGEOFF]
Lloh80:
 adrp    x8, lCPI3_1@PAGE
Lloh81:
 ldr     q2, [x8, lCPI3_1@PAGEOFF]
Lloh82:
 adrp    x8, lCPI3_2@PAGE
Lloh83:
 ldr     q3, [x8, lCPI3_2@PAGEOFF]
Lloh84:
 adrp    x8, lCPI3_3@PAGE
Lloh85:
 ldr     q4, [x8, lCPI3_3@PAGEOFF]
Lloh86:
 adrp    x8, lCPI3_4@PAGE
Lloh87:
 ldr     q5, [x8, lCPI3_4@PAGEOFF]
Lloh88:
 adrp    x8, lCPI3_5@PAGE
Lloh89:
 ldr     q6, [x8, lCPI3_5@PAGEOFF]
Lloh90:
 adrp    x8, lCPI3_6@PAGE
Lloh91:
 ldr     q7, [x8, lCPI3_6@PAGEOFF]
Lloh92:
 adrp    x8, lCPI3_7@PAGE
Lloh93:
 ldr     q16, [x8, lCPI3_7@PAGEOFF]
 cmtst.2d v16, v0, v16
 cmtst.2d v7, v0, v7
 xtn.2s  v7, v7
 xtn2.4s v7, v16
 cmtst.2d v6, v0, v6
 cmtst.2d v5, v0, v5
 xtn.2s  v5, v5
 xtn2.4s v5, v6
 xtn.4h  v5, v5
 xtn2.8h v5, v7
 cmtst.2d v4, v0, v4
 cmtst.2d v3, v0, v3
 xtn.2s  v3, v3
 xtn2.4s v3, v4
 cmtst.2d v2, v0, v2
 cmtst.2d v1, v0, v1
 xtn.2s  v1, v1
 xtn2.4s v1, v2
 xtn.4h  v1, v1
 xtn2.8h v1, v3
 xtn.8b  v1, v1
 xtn2.16b v1, v5
Lloh94:
 adrp    x8, lCPI3_8@PAGE
Lloh95:
 ldr     q2, [x8, lCPI3_8@PAGEOFF]
Lloh96:
 adrp    x8, lCPI3_9@PAGE
Lloh97:
 ldr     q3, [x8, lCPI3_9@PAGEOFF]
Lloh98:
 adrp    x8, lCPI3_10@PAGE
Lloh99:
 ldr     q4, [x8, lCPI3_10@PAGEOFF]
Lloh100:
 adrp    x8, lCPI3_11@PAGE
Lloh101:
 ldr     q5, [x8, lCPI3_11@PAGEOFF]
Lloh102:
 adrp    x8, lCPI3_12@PAGE
Lloh103:
 ldr     q6, [x8, lCPI3_12@PAGEOFF]
Lloh104:
 adrp    x8, lCPI3_13@PAGE
Lloh105:
 ldr     q7, [x8, lCPI3_13@PAGEOFF]
Lloh106:
 adrp    x8, lCPI3_14@PAGE
Lloh107:
 ldr     q16, [x8, lCPI3_14@PAGEOFF]
Lloh108:
 adrp    x8, lCPI3_15@PAGE
Lloh109:
 ldr     q17, [x8, lCPI3_15@PAGEOFF]
 cmtst.2d v17, v0, v17
 cmtst.2d v16, v0, v16
 xtn.2s  v16, v16
 xtn2.4s v16, v17
 cmtst.2d v7, v0, v7
 cmtst.2d v6, v0, v6
 xtn.2s  v6, v6
 xtn2.4s v6, v7
 xtn.4h  v6, v6
 xtn2.8h v6, v16
 cmtst.2d v5, v0, v5
 cmtst.2d v4, v0, v4
 xtn.2s  v4, v4
 xtn2.4s v4, v5
 cmtst.2d v3, v0, v3
 cmtst.2d v2, v0, v2
 xtn.2s  v2, v2
 xtn2.4s v2, v3
 xtn.4h  v2, v2
 xtn2.8h v2, v4
 xtn.8b  v2, v2
 xtn2.16b v2, v6
 eor.16b v1, v1, v2
Lloh110:
 adrp    x8, lCPI3_16@PAGE
Lloh111:
 ldr     q2, [x8, lCPI3_16@PAGEOFF]
Lloh112:
 adrp    x8, lCPI3_17@PAGE
Lloh113:
 ldr     q3, [x8, lCPI3_17@PAGEOFF]
Lloh114:
 adrp    x8, lCPI3_18@PAGE
Lloh115:
 ldr     q4, [x8, lCPI3_18@PAGEOFF]
Lloh116:
 adrp    x8, lCPI3_19@PAGE
Lloh117:
 ldr     q5, [x8, lCPI3_19@PAGEOFF]
Lloh118:
 adrp    x8, lCPI3_20@PAGE
Lloh119:
 ldr     q6, [x8, lCPI3_20@PAGEOFF]
Lloh120:
 adrp    x8, lCPI3_21@PAGE
Lloh121:
 ldr     q7, [x8, lCPI3_21@PAGEOFF]
Lloh122:
 adrp    x8, lCPI3_22@PAGE
Lloh123:
 ldr     q16, [x8, lCPI3_22@PAGEOFF]
Lloh124:
 adrp    x8, lCPI3_23@PAGE
Lloh125:
 ldr     q17, [x8, lCPI3_23@PAGEOFF]
Lloh126:
 adrp    x8, lCPI3_24@PAGE
Lloh127:
 ldr     q18, [x8, lCPI3_24@PAGEOFF]
 cmtst.2d v18, v0, v18
 cmtst.2d v17, v0, v17
 xtn.2s  v17, v17
 xtn2.4s v17, v18
 cmtst.2d v16, v0, v16
 cmtst.2d v7, v0, v7
 xtn.2s  v7, v7
 xtn2.4s v7, v16
 xtn.4h  v7, v7
 xtn2.8h v7, v17
 cmtst.2d v6, v0, v6
 cmtst.2d v5, v0, v5
 xtn.2s  v5, v5
 xtn2.4s v5, v6
 cmtst.2d v4, v0, v4
 cmtst.2d v0, v0, v3
 xtn.2s  v0, v0
 xtn2.4s v0, v4
 xtn.4h  v0, v0
 xtn2.8h v0, v5
 xtn.8b  v0, v0
 xtn2.16b v0, v7
 eor.16b v0, v1, v0
 eor.16b v0, v0, v2
 ext.16b v1, v0, v0, #8
 eor.16b v0, v0, v1
 ext.16b v1, v0, v0, #4
 eor.16b v0, v0, v1
 ext.16b v1, v0, v0, #2
 eor.16b v0, v0, v1
 dup.16b v1, v0[1]
 eor.16b v0, v0, v1
 umov.b  w8, v0[0]
 ubfx    x9, x0, #48, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #49, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #50, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #51, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #52, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #53, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #54, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #55, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #56, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #57, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #58, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #59, #1
 eor     w8, w8, w9
 ubfx    x9, x0, #60, #1
 eor     w8, w8, w9
 lsr     x9, x0, #61
 eor     w8, w8, w9
 lsr     x9, x0, #62
 eor     w8, w8, w9
 and     w0, w8, #0x1
 ret

spread_parity.s

 pub fn parity(code: &u64, i: u32) -> bool {
 mov     w8, #-1
 let mut j = (0b1 << i) - 1;
 lsl     w8, w8, w1
 while j < 64 {
 cmn     w8, #64
 b.lo    LBB2_4
 let mut j = (0b1 << i) - 1;
 mvn     w10, w8
 ldr     x9, [x0]
 mov     w8, #1
LBB2_2:
 if (code & 0b1 << j) != 0b0 {
 lsr     x11, x9, x10
 and     w11, w11, #0x1
 eor     w8, w8, w11
 add     w10, w10, w1
 lsl     w10, w10, #1
 j += j + 2 * (i + 1);
 add     w10, w10, #2
 while j < 64 {
 cmp     w10, #64
 b.lo    LBB2_2
 }
 and     w0, w8, #0x1
 ret
LBB2_4:
 mov     w8, #1
 and     w0, w8, #0x1
 ret