1	# Generated by tools/generators/blake2b_gen.py; do not edit by hand.
2	import Base
3	import ./types.bend as T
4	
5	# 64-bit addition modulo 2^64: the low halves add, their carry-out enters the high half.
6	def add(a: T.Lane, b: T.Lane) -> T.Lane:
7	  match a b:
8	    case T.W{+al,ah} T.W{bl,bh}:
9	      +lo = U32.add(al,bl)
10	      T.W{lo,U32.add(U32.add(ah,bh),Bool.to_u32(U32.is_lt(lo,al)))}
11	
12	def xor(a: T.Lane, b: T.Lane) -> T.Lane:
13	  match a b:
14	    case T.W{al,ah} T.W{bl,bh}: T.W{U32.xor(al,bl),U32.xor(ah,bh)}
15	
16	# The four fixed right rotations of BLAKE2b.
17	def rot32(a: T.Lane) -> T.Lane:
18	  match a:
19	    case T.W{lo,hi}: T.W{hi,lo}
20	
21	def rot24(a: T.Lane) -> T.Lane:
22	  match a:
23	    case T.W{+lo,+hi}:
24	      T.W{U32.or(U32.shrn(lo,24n),U32.shln(hi,8n)),U32.or(U32.shrn(hi,24n),U32.shln(lo,8n))}
25	
26	def rot16(a: T.Lane) -> T.Lane:
27	  match a:
28	    case T.W{+lo,+hi}:
29	      T.W{U32.or(U32.shrn(lo,16n),U32.shln(hi,16n)),U32.or(U32.shrn(hi,16n),U32.shln(lo,16n))}
30	
31	def rot63(a: T.Lane) -> T.Lane:
32	  match a:
33	    case T.W{+lo,+hi}:
34	      T.W{U32.or(U32.shrn(hi,31n),U32.shln(lo,1n)),U32.or(U32.shrn(lo,31n),U32.shln(hi,1n))}