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@binji
Created August 2, 2017 18:34
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memcpy.wast
(module
(import "env" "memory" (memory 1))
(func $memcpy (export "memcpy") (param i32 i32 i32) (result i32)
(local i32)
(block (result i32) ;; label = @1
(set_local 3
(get_local 0))
(if ;; label = @3
(i32.eq
(i32.and
(get_local 0)
(i32.const 3))
(i32.and
(get_local 1)
(i32.const 3)))
(then
(loop ;; label = @4
(if ;; label = @5
(i32.and
(get_local 0)
(i32.const 3))
(then
(if ;; label = @6
(i32.eqz
(get_local 2))
(then
(return
(get_local 3))))
(i32.store8
(get_local 0)
(i32.load8_s
(get_local 1)))
(set_local 0
(i32.add
(get_local 0)
(i32.const 1)))
(set_local 1
(i32.add
(get_local 1)
(i32.const 1)))
(set_local 2
(i32.sub
(get_local 2)
(i32.const 1)))
(br 1 (;@5;)))))
(loop ;; label = @7
(if ;; label = @8
(i32.ge_s
(get_local 2)
(i32.const 4))
(then
(i32.store
(get_local 0)
(i32.load
(get_local 1)))
(set_local 0
(i32.add
(get_local 0)
(i32.const 4)))
(set_local 1
(i32.add
(get_local 1)
(i32.const 4)))
(set_local 2
(i32.sub
(get_local 2)
(i32.const 4)))
(br 1 (;@7;)))))))
(loop ;; label = @9
(if ;; label = @10
(i32.gt_s
(get_local 2)
(i32.const 0))
(then
(i32.store8
(get_local 0)
(i32.load8_s
(get_local 1)))
(set_local 0
(i32.add
(get_local 0)
(i32.const 1)))
(set_local 1
(i32.add
(get_local 1)
(i32.const 1)))
(set_local 2
(i32.sub
(get_local 2)
(i32.const 1)))
(br 1 (;@9;)))))
(get_local 3)))
(func $memmove (export "memmove") (param i32 i32 i32) (result i32)
(local i32)
(block (result i32) ;; label = @1
(if ;; label = @2
(i32.and
(i32.lt_s
(get_local 1)
(get_local 0))
(i32.lt_s
(get_local 0)
(i32.add
(get_local 1)
(get_local 2))))
(then
(set_local 3
(get_local 0))
(set_local 1
(i32.add
(get_local 1)
(get_local 2)))
(set_local 0
(i32.add
(get_local 0)
(get_local 2)))
(loop ;; label = @3
(if ;; label = @4
(i32.gt_s
(get_local 2)
(i32.const 0))
(then
(set_local 2
(i32.sub
(get_local 2)
(i32.const 1)))
(i32.store8
(tee_local 0
(i32.sub
(get_local 0)
(i32.const 1)))
(i32.load8_s
(tee_local 1
(i32.sub
(get_local 1)
(i32.const 1)))))
(br 1 (;@3;)))))
(set_local 0
(get_local 3)))
(else
(drop
(call $memcpy
(get_local 0)
(get_local 1)
(get_local 2)))))
(get_local 0)))
)
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