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124 lines
2.4 KiB
124 lines
2.4 KiB
(module
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(memory 1 1)
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(data 0 (i32.const 1000) "hello")
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(data 0 (i32.const 2000) "olleh")
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(func $is_char (param i32 i32) (result i32)
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local.get 0
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i32.load8_u
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local.get 1
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i32.eq)
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(func (export "is hello?") (param i32) (result i32)
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local.get 0
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i32.const 104 ;; 'h'
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call $is_char
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local.get 0
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i32.const 1
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i32.add
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i32.const 101 ;; 'e'
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call $is_char
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local.get 0
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i32.const 2
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i32.add
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i32.const 108 ;; 'l'
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call $is_char
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local.get 0
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i32.const 3
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i32.add
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i32.const 108 ;; 'l'
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call $is_char
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local.get 0
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i32.const 4
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i32.add
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i32.const 111 ;; 'o'
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call $is_char
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i32.and
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i32.and
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i32.and
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i32.and
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)
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(func (export "is olleh?") (param i32) (result i32)
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local.get 0
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i32.const 111 ;; 'o'
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call $is_char
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local.get 0
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i32.const 1
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i32.add
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i32.const 108 ;; 'l'
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call $is_char
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local.get 0
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i32.const 2
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i32.add
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i32.const 108 ;; 'l'
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call $is_char
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local.get 0
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i32.const 3
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i32.add
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i32.const 101 ;; 'e'
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call $is_char
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local.get 0
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i32.const 4
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i32.add
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i32.const 104 ;; 'h'
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call $is_char
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i32.and
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i32.and
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i32.and
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i32.and
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)
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(func (export "memory.copy") (param i32 i32 i32)
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local.get 0
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local.get 1
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local.get 2
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memory.copy))
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;; Our memory has our initial data in the right places.
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(assert_return
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(invoke "is hello?" (i32.const 1000))
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(i32.const 1))
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(assert_return
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(invoke "is olleh?" (i32.const 2000))
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(i32.const 1))
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;; Non-overlapping memory copy with dst < src.
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(invoke "memory.copy" (i32.const 500) (i32.const 1000) (i32.const 5))
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(assert_return
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(invoke "is hello?" (i32.const 500))
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(i32.const 1))
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;; Non-overlapping memory copy with dst > src.
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(invoke "memory.copy" (i32.const 1500) (i32.const 1000) (i32.const 5))
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(assert_return
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(invoke "is hello?" (i32.const 1500))
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(i32.const 1))
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;; Overlapping memory copy with dst < src.
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(invoke "memory.copy" (i32.const 1998) (i32.const 2000) (i32.const 5))
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(assert_return
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(invoke "is olleh?" (i32.const 1998))
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(i32.const 1))
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;; Overlapping memory copy with dst > src.
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(invoke "memory.copy" (i32.const 2000) (i32.const 1998) (i32.const 5))
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(assert_return
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(invoke "is olleh?" (i32.const 2000))
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(i32.const 1))
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;; Overlapping memory copy with dst = src.
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(invoke "memory.copy" (i32.const 2000) (i32.const 2000) (i32.const 5))
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(assert_return
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(invoke "is olleh?" (i32.const 2000))
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(i32.const 1))
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