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sha256.wat
607 lines (529 loc) · 36.4 KB
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sha256.wat
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(module
(memory $0 1)
(export "memory" (memory $0))
(global $a (mut i32) (i32.const 0))
(global $b (mut i32) (i32.const 0))
(global $c (mut i32) (i32.const 0))
(global $d (mut i32) (i32.const 0))
(global $e (mut i32) (i32.const 0))
(global $f (mut i32) (i32.const 0))
(global $g (mut i32) (i32.const 0))
(global $h (mut i32) (i32.const 0))
(func $i32.bswap
(param $b i32)
(result i32)
;; 2 get, 4 const, 5 bitwise
(i32.or
(get_local $b)
(i32.const 0x00FF00FF)
(i32.and)
(i32.rotr (i32.const 8))
(get_local $b)
(i32.const 0xFF00FF00)
(i32.and)
(i32.rotl (i32.const 8))))
(func $four_round
(param $w0 i32) (param $w1 i32) (param $w2 i32) (param $w3 i32)
(param $k0 i32) (param $k1 i32) (param $k2 i32) (param $k3 i32)
;; precomputed values
(local $T1 i32)
(local $T2 i32)
(local $ch_res i32)
(local $maj_res i32)
(local $big_sig0_res i32)
(local $big_sig1_res i32)
;; precompute intermediate values
;; T1 = h + big_sig1(e) + ch(e, f, g) + K0 + W0
;; T2 = big_sig0(a) + Maj(a, b, c)
;; can compute 4 rounds independently
(set_local $ch_res (i32.xor (i32.and (get_global $e) (get_global $f)) (i32.and (i32.xor (get_global $e) (i32.const -1)) (get_global $g))))
(set_local $maj_res (i32.xor (i32.xor (i32.and (get_global $a) (get_global $b)) (i32.and (get_global $a) (get_global $c))) (i32.and (get_global $b) (get_global $c))))
(set_local $big_sig0_res (i32.xor (i32.xor (i32.rotr (get_global $a) (i32.const 2)) (i32.rotr (get_global $a) (i32.const 13))) (i32.rotr (get_global $a) (i32.const 22))))
(set_local $big_sig1_res (i32.xor (i32.xor (i32.rotr (get_global $e) (i32.const 6)) (i32.rotr (get_global $e) (i32.const 11))) (i32.rotr (get_global $e) (i32.const 25))))
(set_local $T1 (i32.add (i32.add (i32.add (i32.add (get_global $h) (get_local $ch_res)) (get_local $big_sig1_res)) (get_local $w0)) (get_local $k0)))
(set_local $T2 (i32.add (get_local $big_sig0_res) (get_local $maj_res)))
(set_global $h (i32.add (get_global $d) (get_local $T1)))
(set_global $d (i32.add (get_local $T1) (get_local $T2)))
(set_local $ch_res (i32.xor (i32.and (get_global $h) (get_global $e)) (i32.and (i32.xor (get_global $h) (i32.const -1)) (get_global $f))))
(set_local $maj_res (i32.xor (i32.xor (i32.and (get_global $d) (get_global $a)) (i32.and (get_global $d) (get_global $b))) (i32.and (get_global $a) (get_global $b))))
(set_local $big_sig0_res (i32.xor (i32.xor (i32.rotr (get_global $d) (i32.const 2)) (i32.rotr (get_global $d) (i32.const 13))) (i32.rotr (get_global $d) (i32.const 22))))
(set_local $big_sig1_res (i32.xor (i32.xor (i32.rotr (get_global $h) (i32.const 6)) (i32.rotr (get_global $h) (i32.const 11))) (i32.rotr (get_global $h) (i32.const 25))))
(set_local $T1 (i32.add (i32.add (i32.add (i32.add (get_global $g) (get_local $ch_res)) (get_local $big_sig1_res)) (get_local $w1)) (get_local $k1)))
(set_local $T2 (i32.add (get_local $big_sig0_res) (get_local $maj_res)))
(set_global $g (i32.add (get_global $c) (get_local $T1)))
(set_global $c (i32.add (get_local $T1) (get_local $T2)))
(set_local $ch_res (i32.xor (i32.and (get_global $g) (get_global $h)) (i32.and (i32.xor (get_global $g) (i32.const -1)) (get_global $e))))
(set_local $maj_res (i32.xor (i32.xor (i32.and (get_global $c) (get_global $d)) (i32.and (get_global $c) (get_global $a))) (i32.and (get_global $d) (get_global $a))))
(set_local $big_sig0_res (i32.xor (i32.xor (i32.rotr (get_global $c) (i32.const 2)) (i32.rotr (get_global $c) (i32.const 13))) (i32.rotr (get_global $c) (i32.const 22))))
(set_local $big_sig1_res (i32.xor (i32.xor (i32.rotr (get_global $g) (i32.const 6)) (i32.rotr (get_global $g) (i32.const 11))) (i32.rotr (get_global $g) (i32.const 25))))
(set_local $T1 (i32.add (i32.add (i32.add (i32.add (get_global $f) (get_local $ch_res)) (get_local $big_sig1_res)) (get_local $w2)) (get_local $k2)))
(set_local $T2 (i32.add (get_local $big_sig0_res) (get_local $maj_res)))
(set_global $f (i32.add (get_global $b) (get_local $T1)))
(set_global $b (i32.add (get_local $T1) (get_local $T2)))
(set_local $ch_res (i32.xor (i32.and (get_global $f) (get_global $g)) (i32.and (i32.xor (get_global $f) (i32.const -1)) (get_global $h))))
(set_local $maj_res (i32.xor (i32.xor (i32.and (get_global $b) (get_global $c)) (i32.and (get_global $b) (get_global $d))) (i32.and (get_global $c) (get_global $d))))
(set_local $big_sig0_res (i32.xor (i32.xor (i32.rotr (get_global $b) (i32.const 2)) (i32.rotr (get_global $b) (i32.const 13))) (i32.rotr (get_global $b) (i32.const 22))))
(set_local $big_sig1_res (i32.xor (i32.xor (i32.rotr (get_global $f) (i32.const 6)) (i32.rotr (get_global $f) (i32.const 11))) (i32.rotr (get_global $f) (i32.const 25))))
(set_local $T1 (i32.add (i32.add (i32.add (i32.add (get_global $e) (get_local $ch_res)) (get_local $big_sig1_res)) (get_local $w3)) (get_local $k3)))
(set_local $T2 (i32.add (get_local $big_sig0_res) (get_local $maj_res)))
(set_global $e (i32.add (get_global $a) (get_local $T1)))
(set_global $a (i32.add (get_local $T1) (get_local $T2))))
(func $expand
(param $a i32) (param $b i32) (param $c i32) (param $d i32)
(result i32)
(i32.add
(i32.add
(i32.add
(i32.xor
(i32.xor
(i32.rotr (get_local $a) (i32.const 17))
(i32.rotr (get_local $a) (i32.const 19)))
(i32.shr_u (get_local $a) (i32.const 10)))
(get_local $b))
(i32.xor
(i32.xor
(i32.rotr (get_local $c) (i32.const 7))
(i32.rotr (get_local $c) (i32.const 18)))
(i32.shr_u (get_local $c) (i32.const 3)))
(get_local $d))))
(func $compress
(param $ctx i32)
(param $w0 i32) (param $w1 i32) (param $w2 i32) (param $w3 i32)
(param $w4 i32) (param $w5 i32) (param $w6 i32) (param $w7 i32)
(param $w8 i32) (param $w9 i32) (param $w10 i32) (param $w11 i32)
(param $w12 i32) (param $w13 i32) (param $w14 i32) (param $w15 i32)
;; expanded message schedule
(local $w16 i32) (local $w17 i32) (local $w18 i32) (local $w19 i32)
(local $w20 i32) (local $w21 i32) (local $w22 i32) (local $w23 i32)
(local $w24 i32) (local $w25 i32) (local $w26 i32) (local $w27 i32)
(local $w28 i32) (local $w29 i32) (local $w30 i32) (local $w31 i32)
(local $w32 i32) (local $w33 i32) (local $w34 i32) (local $w35 i32)
(local $w36 i32) (local $w37 i32) (local $w38 i32) (local $w39 i32)
(local $w40 i32) (local $w41 i32) (local $w42 i32) (local $w43 i32)
(local $w44 i32) (local $w45 i32) (local $w46 i32) (local $w47 i32)
(local $w48 i32) (local $w49 i32) (local $w50 i32) (local $w51 i32)
(local $w52 i32) (local $w53 i32) (local $w54 i32) (local $w55 i32)
(local $w56 i32) (local $w57 i32) (local $w58 i32) (local $w59 i32)
(local $w60 i32) (local $w61 i32) (local $w62 i32) (local $w63 i32)
;; store inital state
(if (i32.eqz (i32.load offset=104 (get_local $ctx)))
(then
(i32.store offset=0 (get_local $ctx) (i32.const 0x6a09e667))
(i32.store offset=4 (get_local $ctx) (i32.const 0xbb67ae85))
(i32.store offset=8 (get_local $ctx) (i32.const 0x3c6ef372))
(i32.store offset=12 (get_local $ctx) (i32.const 0xa54ff53a))
(i32.store offset=16 (get_local $ctx) (i32.const 0x510e527f))
(i32.store offset=20 (get_local $ctx) (i32.const 0x9b05688c))
(i32.store offset=24 (get_local $ctx) (i32.const 0x1f83d9ab))
(i32.store offset=28 (get_local $ctx) (i32.const 0x5be0cd19))
(i32.store offset=104 (get_local $ctx) (i32.const 1))))
;; load previous hash state into registers
(set_global $a (i32.load offset=0 (get_local $ctx)))
(set_global $b (i32.load offset=4 (get_local $ctx)))
(set_global $c (i32.load offset=8 (get_local $ctx)))
(set_global $d (i32.load offset=12 (get_local $ctx)))
(set_global $e (i32.load offset=16 (get_local $ctx)))
(set_global $f (i32.load offset=20 (get_local $ctx)))
(set_global $g (i32.load offset=24 (get_local $ctx)))
(set_global $h (i32.load offset=28 (get_local $ctx)))
(set_local $w0 (call $i32.bswap (get_local $w0 )))
(set_local $w1 (call $i32.bswap (get_local $w1 )))
(set_local $w2 (call $i32.bswap (get_local $w2 )))
(set_local $w3 (call $i32.bswap (get_local $w3 )))
(set_local $w4 (call $i32.bswap (get_local $w4 )))
(set_local $w5 (call $i32.bswap (get_local $w5 )))
(set_local $w6 (call $i32.bswap (get_local $w6 )))
(set_local $w7 (call $i32.bswap (get_local $w7 )))
(set_local $w8 (call $i32.bswap (get_local $w8 )))
(set_local $w9 (call $i32.bswap (get_local $w9 )))
(set_local $w10 (call $i32.bswap (get_local $w10)))
(set_local $w11 (call $i32.bswap (get_local $w11)))
(set_local $w12 (call $i32.bswap (get_local $w12)))
(set_local $w13 (call $i32.bswap (get_local $w13)))
(set_local $w14 (call $i32.bswap (get_local $w14)))
(set_local $w15 (call $i32.bswap (get_local $w15)))
(call $four_round (get_local $w0) (get_local $w1) (get_local $w2) (get_local $w3) (i32.const 0x428a2f98) (i32.const 0x71374491) (i32.const 0xb5c0fbcf) (i32.const 0xe9b5dba5))
(call $four_round (get_local $w4) (get_local $w5) (get_local $w6) (get_local $w7) (i32.const 0x3956c25b) (i32.const 0x59f111f1) (i32.const 0x923f82a4) (i32.const 0xab1c5ed5))
(call $four_round (get_local $w8) (get_local $w9) (get_local $w10) (get_local $w11) (i32.const 0xd807aa98) (i32.const 0x12835b01) (i32.const 0x243185be) (i32.const 0x550c7dc3))
(call $four_round (get_local $w12) (get_local $w13) (get_local $w14) (get_local $w15) (i32.const 0x72be5d74) (i32.const 0x80deb1fe) (i32.const 0x9bdc06a7) (i32.const 0xc19bf174))
(set_local $w0 (call $expand (get_local $w14) (get_local $w9) (get_local $w1) (get_local $w0)))
(set_local $w1 (call $expand (get_local $w15) (get_local $w10) (get_local $w2) (get_local $w1)))
(set_local $w2 (call $expand (get_local $w0 ) (get_local $w11) (get_local $w3) (get_local $w2)))
(set_local $w3 (call $expand (get_local $w1 ) (get_local $w12) (get_local $w4) (get_local $w3)))
(set_local $w4 (call $expand (get_local $w2 ) (get_local $w13) (get_local $w5) (get_local $w4)))
(set_local $w5 (call $expand (get_local $w3 ) (get_local $w14) (get_local $w6) (get_local $w5)))
(set_local $w6 (call $expand (get_local $w4 ) (get_local $w15) (get_local $w7) (get_local $w6)))
(set_local $w7 (call $expand (get_local $w5 ) (get_local $w0) (get_local $w8) (get_local $w7)))
(set_local $w8 (call $expand (get_local $w6 ) (get_local $w1) (get_local $w9) (get_local $w8)))
(set_local $w9 (call $expand (get_local $w7 ) (get_local $w2) (get_local $w10) (get_local $w9)))
(set_local $w10 (call $expand (get_local $w8 ) (get_local $w3) (get_local $w11) (get_local $w10)))
(set_local $w11 (call $expand (get_local $w9 ) (get_local $w4) (get_local $w12) (get_local $w11)))
(set_local $w12 (call $expand (get_local $w10) (get_local $w5) (get_local $w13) (get_local $w12)))
(set_local $w13 (call $expand (get_local $w11) (get_local $w6) (get_local $w14) (get_local $w13)))
(set_local $w14 (call $expand (get_local $w12) (get_local $w7) (get_local $w15) (get_local $w14)))
(set_local $w15 (call $expand (get_local $w13) (get_local $w8) (get_local $w0) (get_local $w15)))
(call $four_round (get_local $w0) (get_local $w1) (get_local $w2) (get_local $w3) (i32.const 0xe49b69c1) (i32.const 0xefbe4786) (i32.const 0x0fc19dc6) (i32.const 0x240ca1cc))
(call $four_round (get_local $w4) (get_local $w5) (get_local $w6) (get_local $w7) (i32.const 0x2de92c6f) (i32.const 0x4a7484aa) (i32.const 0x5cb0a9dc) (i32.const 0x76f988da))
(call $four_round (get_local $w8) (get_local $w9) (get_local $w10) (get_local $w11) (i32.const 0x983e5152) (i32.const 0xa831c66d) (i32.const 0xb00327c8) (i32.const 0xbf597fc7))
(call $four_round (get_local $w12) (get_local $w13) (get_local $w14) (get_local $w15) (i32.const 0xc6e00bf3) (i32.const 0xd5a79147) (i32.const 0x06ca6351) (i32.const 0x14292967))
(set_local $w0 (call $expand (get_local $w14) (get_local $w9) (get_local $w1) (get_local $w0)))
(set_local $w1 (call $expand (get_local $w15) (get_local $w10) (get_local $w2) (get_local $w1)))
(set_local $w2 (call $expand (get_local $w0 ) (get_local $w11) (get_local $w3) (get_local $w2)))
(set_local $w3 (call $expand (get_local $w1 ) (get_local $w12) (get_local $w4) (get_local $w3)))
(set_local $w4 (call $expand (get_local $w2 ) (get_local $w13) (get_local $w5) (get_local $w4)))
(set_local $w5 (call $expand (get_local $w3 ) (get_local $w14) (get_local $w6) (get_local $w5)))
(set_local $w6 (call $expand (get_local $w4 ) (get_local $w15) (get_local $w7) (get_local $w6)))
(set_local $w7 (call $expand (get_local $w5 ) (get_local $w0) (get_local $w8) (get_local $w7)))
(set_local $w8 (call $expand (get_local $w6 ) (get_local $w1) (get_local $w9) (get_local $w8)))
(set_local $w9 (call $expand (get_local $w7 ) (get_local $w2) (get_local $w10) (get_local $w9)))
(set_local $w10 (call $expand (get_local $w8 ) (get_local $w3) (get_local $w11) (get_local $w10)))
(set_local $w11 (call $expand (get_local $w9 ) (get_local $w4) (get_local $w12) (get_local $w11)))
(set_local $w12 (call $expand (get_local $w10) (get_local $w5) (get_local $w13) (get_local $w12)))
(set_local $w13 (call $expand (get_local $w11) (get_local $w6) (get_local $w14) (get_local $w13)))
(set_local $w14 (call $expand (get_local $w12) (get_local $w7) (get_local $w15) (get_local $w14)))
(set_local $w15 (call $expand (get_local $w13) (get_local $w8) (get_local $w0) (get_local $w15)))
(call $four_round (get_local $w0) (get_local $w1) (get_local $w2) (get_local $w3) (i32.const 0x27b70a85) (i32.const 0x2e1b2138) (i32.const 0x4d2c6dfc) (i32.const 0x53380d13))
(call $four_round (get_local $w4) (get_local $w5) (get_local $w6) (get_local $w7) (i32.const 0x650a7354) (i32.const 0x766a0abb) (i32.const 0x81c2c92e) (i32.const 0x92722c85))
(call $four_round (get_local $w8) (get_local $w9) (get_local $w10) (get_local $w11) (i32.const 0xa2bfe8a1) (i32.const 0xa81a664b) (i32.const 0xc24b8b70) (i32.const 0xc76c51a3))
(call $four_round (get_local $w12) (get_local $w13) (get_local $w14) (get_local $w15) (i32.const 0xd192e819) (i32.const 0xd6990624) (i32.const 0xf40e3585) (i32.const 0x106aa070))
(set_local $w0 (call $expand (get_local $w14) (get_local $w9) (get_local $w1) (get_local $w0)))
(set_local $w1 (call $expand (get_local $w15) (get_local $w10) (get_local $w2) (get_local $w1)))
(set_local $w2 (call $expand (get_local $w0 ) (get_local $w11) (get_local $w3) (get_local $w2)))
(set_local $w3 (call $expand (get_local $w1 ) (get_local $w12) (get_local $w4) (get_local $w3)))
(set_local $w4 (call $expand (get_local $w2 ) (get_local $w13) (get_local $w5) (get_local $w4)))
(set_local $w5 (call $expand (get_local $w3 ) (get_local $w14) (get_local $w6) (get_local $w5)))
(set_local $w6 (call $expand (get_local $w4 ) (get_local $w15) (get_local $w7) (get_local $w6)))
(set_local $w7 (call $expand (get_local $w5 ) (get_local $w0) (get_local $w8) (get_local $w7)))
(set_local $w8 (call $expand (get_local $w6 ) (get_local $w1) (get_local $w9) (get_local $w8)))
(set_local $w9 (call $expand (get_local $w7 ) (get_local $w2) (get_local $w10) (get_local $w9)))
(set_local $w10 (call $expand (get_local $w8 ) (get_local $w3) (get_local $w11) (get_local $w10)))
(set_local $w11 (call $expand (get_local $w9 ) (get_local $w4) (get_local $w12) (get_local $w11)))
(set_local $w12 (call $expand (get_local $w10) (get_local $w5) (get_local $w13) (get_local $w12)))
(set_local $w13 (call $expand (get_local $w11) (get_local $w6) (get_local $w14) (get_local $w13)))
(set_local $w14 (call $expand (get_local $w12) (get_local $w7) (get_local $w15) (get_local $w14)))
(set_local $w15 (call $expand (get_local $w13) (get_local $w8) (get_local $w0) (get_local $w15)))
(call $four_round (get_local $w0) (get_local $w1) (get_local $w2) (get_local $w3) (i32.const 0x19a4c116) (i32.const 0x1e376c08) (i32.const 0x2748774c) (i32.const 0x34b0bcb5))
(call $four_round (get_local $w4) (get_local $w5) (get_local $w6) (get_local $w7) (i32.const 0x391c0cb3) (i32.const 0x4ed8aa4a) (i32.const 0x5b9cca4f) (i32.const 0x682e6ff3))
(call $four_round (get_local $w8) (get_local $w9) (get_local $w10) (get_local $w11) (i32.const 0x748f82ee) (i32.const 0x78a5636f) (i32.const 0x84c87814) (i32.const 0x8cc70208))
(call $four_round (get_local $w12) (get_local $w13) (get_local $w14) (get_local $w15) (i32.const 0x90befffa) (i32.const 0xa4506ceb) (i32.const 0xbef9a3f7) (i32.const 0xc67178f2))
;; store hash values
(i32.store offset=0 (get_local $ctx) (i32.add (i32.load offset=0 (get_local $ctx)) (get_global $a)))
(i32.store offset=4 (get_local $ctx) (i32.add (i32.load offset=4 (get_local $ctx)) (get_global $b)))
(i32.store offset=8 (get_local $ctx) (i32.add (i32.load offset=8 (get_local $ctx)) (get_global $c)))
(i32.store offset=12 (get_local $ctx) (i32.add (i32.load offset=12 (get_local $ctx)) (get_global $d)))
(i32.store offset=16 (get_local $ctx) (i32.add (i32.load offset=16 (get_local $ctx)) (get_global $e)))
(i32.store offset=20 (get_local $ctx) (i32.add (i32.load offset=20 (get_local $ctx)) (get_global $f)))
(i32.store offset=24 (get_local $ctx) (i32.add (i32.load offset=24 (get_local $ctx)) (get_global $g)))
(i32.store offset=28 (get_local $ctx) (i32.add (i32.load offset=28 (get_local $ctx)) (get_global $h))))
(func $sha256 (export "sha256") (param $ctx i32) (param $roi i32) (param $length i32) (param $final i32)
;; schema 208 bytes
;; 0..32 hash state
;; 32..40 number of bytes read across all updates (128bit)
;; 40..104 store words between updates
;; 104..108 init flag
(local $bytes_read i64)
(local $last_word i32)
(local $tail i32)
;; expanded message schedule
(local $w0 i32) (local $w1 i32) (local $w2 i32) (local $w3 i32)
(local $w4 i32) (local $w5 i32) (local $w6 i32) (local $w7 i32)
(local $w8 i32) (local $w9 i32) (local $w10 i32) (local $w11 i32)
(local $w12 i32) (local $w13 i32) (local $w14 i32) (local $w15 i32)
(set_local $bytes_read (i64.load offset=32 (get_local $ctx)))
(set_local $tail (i32.add (i32.and (i32.wrap/i64 (get_local $bytes_read)) (i32.const 0x3f)) (get_local $length)))
;; load current block position
(set_local $bytes_read (i64.add (get_local $bytes_read) (i64.extend_u/i32 (get_local $length))))
(i64.store offset=32 (get_local $ctx) (get_local $bytes_read))
(block $finish
(set_local $w0 (i32.load offset=40 (get_local $ctx)))
(set_local $w1 (i32.load offset=44 (get_local $ctx)))
(set_local $w2 (i32.load offset=48 (get_local $ctx)))
(set_local $w3 (i32.load offset=52 (get_local $ctx)))
(set_local $w4 (i32.load offset=56 (get_local $ctx)))
(set_local $w5 (i32.load offset=60 (get_local $ctx)))
(set_local $w6 (i32.load offset=64 (get_local $ctx)))
(set_local $w7 (i32.load offset=68 (get_local $ctx)))
(set_local $w8 (i32.load offset=72 (get_local $ctx)))
(set_local $w9 (i32.load offset=76 (get_local $ctx)))
(set_local $w10 (i32.load offset=80 (get_local $ctx)))
(set_local $w11 (i32.load offset=84 (get_local $ctx)))
(set_local $w12 (i32.load offset=88 (get_local $ctx)))
(set_local $w13 (i32.load offset=92 (get_local $ctx)))
(set_local $w14 (i32.load offset=96 (get_local $ctx)))
(set_local $w15 (i32.load offset=100 (get_local $ctx)))
(tee_local $tail (i32.sub (get_local $tail) (i32.const 64)))
(i32.const 0)
(i32.lt_s)
(br_if $finish)
(get_local $ctx)
(get_local $w0 )
(get_local $w1 )
(get_local $w2 )
(get_local $w3 )
(get_local $w4 )
(get_local $w5 )
(get_local $w6 )
(get_local $w7 )
(get_local $w8 )
(get_local $w9 )
(get_local $w10)
(get_local $w11)
(get_local $w12)
(get_local $w13)
(get_local $w14)
(get_local $w15)
(call $compress)
(loop $rest_of_input
(set_local $w0 (i32.load offset=0 (get_local $roi)))
(set_local $w1 (i32.load offset=4 (get_local $roi)))
(set_local $w2 (i32.load offset=8 (get_local $roi)))
(set_local $w3 (i32.load offset=12 (get_local $roi)))
(set_local $w4 (i32.load offset=16 (get_local $roi)))
(set_local $w5 (i32.load offset=20 (get_local $roi)))
(set_local $w6 (i32.load offset=24 (get_local $roi)))
(set_local $w7 (i32.load offset=28 (get_local $roi)))
(set_local $w8 (i32.load offset=32 (get_local $roi)))
(set_local $w9 (i32.load offset=36 (get_local $roi)))
(set_local $w10 (i32.load offset=40 (get_local $roi)))
(set_local $w11 (i32.load offset=44 (get_local $roi)))
(set_local $w12 (i32.load offset=48 (get_local $roi)))
(set_local $w13 (i32.load offset=52 (get_local $roi)))
(set_local $w14 (i32.load offset=56 (get_local $roi)))
(set_local $w15 (i32.load offset=60 (get_local $roi)))
(set_local $roi (i32.add (get_local $roi) (i32.const 64)))
(tee_local $tail (i32.sub (get_local $tail) (i32.const 64)))
(i32.const 0)
(i32.lt_s)
(if
(then
(i32.store offset=40 (get_local $ctx) (get_local $w0))
(i32.store offset=44 (get_local $ctx) (get_local $w1))
(i32.store offset=48 (get_local $ctx) (get_local $w2))
(i32.store offset=52 (get_local $ctx) (get_local $w3))
(i32.store offset=56 (get_local $ctx) (get_local $w4))
(i32.store offset=60 (get_local $ctx) (get_local $w5))
(i32.store offset=64 (get_local $ctx) (get_local $w6))
(i32.store offset=68 (get_local $ctx) (get_local $w7))
(i32.store offset=72 (get_local $ctx) (get_local $w8))
(i32.store offset=76 (get_local $ctx) (get_local $w9))
(i32.store offset=80 (get_local $ctx) (get_local $w10))
(i32.store offset=84 (get_local $ctx) (get_local $w11))
(i32.store offset=88 (get_local $ctx) (get_local $w12))
(i32.store offset=92 (get_local $ctx) (get_local $w13))
(i32.store offset=96 (get_local $ctx) (get_local $w14))
(i32.store offset=100 (get_local $ctx) (get_local $w15))
(br $finish)))
(get_local $ctx)
(get_local $w0 )
(get_local $w1 )
(get_local $w2 )
(get_local $w3 )
(get_local $w4 )
(get_local $w5 )
(get_local $w6 )
(get_local $w7 )
(get_local $w8 )
(get_local $w9 )
(get_local $w10)
(get_local $w11)
(get_local $w12)
(get_local $w13)
(get_local $w14)
(get_local $w15)
(call $compress)
(br $rest_of_input)))
(if (i32.eq (get_local $final) (i32.const 1))
(then
(set_local $tail (i32.and (i32.wrap/i64 (get_local $bytes_read)) (i32.const 0x3f)))
(set_local $last_word (i32.shl (i32.const 0x80) (i32.shl (i32.and (get_local $tail) (i32.const 0x3)) (i32.const 3))))
(block $pad_end
(block $13
(block $12
(block $11
(block $10
(block $9
(block $8
(block $7
(block $6
(block $5
(block $4
(block $3
(block $2
(block $1
(block $0
(block $15
(block $14
(block $switch
(get_local $tail)
(i32.const 2)
(i32.shr_u)
(br_table $0 $1 $2 $3 $4 $5 $6 $7 $8 $9 $10 $11 $12 $13 $14 $15)))
(get_local $last_word)
(get_local $w14)
(i32.or)
(set_local $w14)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w15)
(i32.or)
(set_local $w15)
(set_local $last_word (i32.const 0))
;; compress
(get_local $ctx)
(get_local $w0)
(get_local $w1)
(get_local $w2)
(get_local $w3)
(get_local $w4)
(get_local $w5)
(get_local $w6)
(get_local $w7)
(get_local $w8)
(get_local $w9)
(get_local $w10)
(get_local $w11)
(get_local $w12)
(get_local $w13)
(get_local $w14)
(get_local $w15)
(call $compress)
(i64.store offset=32 (get_local $ctx) (get_local $bytes_read))
;; zero out words
(set_local $w0 (i32.const 0))
(set_local $w1 (i32.const 0))
(set_local $w2 (i32.const 0))
(set_local $w3 (i32.const 0))
(set_local $w4 (i32.const 0))
(set_local $w5 (i32.const 0))
(set_local $w6 (i32.const 0))
(set_local $w7 (i32.const 0))
(set_local $w8 (i32.const 0))
(set_local $w9 (i32.const 0))
(set_local $w10 (i32.const 0))
(set_local $w11 (i32.const 0))
(set_local $w12 (i32.const 0))
(set_local $w13 (i32.const 0))
(set_local $w14 (i32.const 0))
(set_local $w15 (i32.const 0)))
(get_local $last_word)
(get_local $w0)
(i32.or)
(set_local $w0)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w1)
(i32.or)
(set_local $w1)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w2)
(i32.or)
(set_local $w2)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w3)
(i32.or)
(set_local $w3)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w4)
(i32.or)
(set_local $w4)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w5)
(i32.or)
(set_local $w5)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w6)
(i32.or)
(set_local $w6)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w7)
(i32.or)
(set_local $w7)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w8)
(i32.or)
(set_local $w8)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w9)
(i32.or)
(set_local $w9)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w10)
(i32.or)
(set_local $w10)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w11)
(i32.or)
(set_local $w11)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w12)
(i32.or)
(set_local $w12)
(set_local $last_word (i32.const 0)))
(get_local $last_word)
(get_local $w13)
(i32.or)
(set_local $w13)
(set_local $last_word (i32.const 0)))
(set_local $w14 (call $i32.bswap (i32.wrap/i64 (i64.shr_u (get_local $bytes_read) (i64.const 29)))))
(set_local $w15 (call $i32.bswap (i32.wrap/i64 (i64.shl (get_local $bytes_read) (i64.const 3)))))
(get_local $ctx)
(get_local $w0)
(get_local $w1)
(get_local $w2)
(get_local $w3)
(get_local $w4)
(get_local $w5)
(get_local $w6)
(get_local $w7)
(get_local $w8)
(get_local $w9)
(get_local $w10)
(get_local $w11)
(get_local $w12)
(get_local $w13)
(get_local $w14)
(get_local $w15)
(call $compress)
(get_local $ctx)
(i32.load offset=0 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=0)
(get_local $ctx)
(i32.load offset=4 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=4)
(get_local $ctx)
(i32.load offset=8 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=8)
(get_local $ctx)
(i32.load offset=12 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=12)
(get_local $ctx)
(i32.load offset=16 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=16)
(get_local $ctx)
(i32.load offset=20 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=20)
(get_local $ctx)
(i32.load offset=24 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=24)
(get_local $ctx)
(i32.load offset=28 (get_local $ctx))
(call $i32.bswap)
(i32.store offset=28)))))