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mul.wast
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mul.wast
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;; Copyright (c) 2015 Intel Corporation
;;
;; Licensed under the Apache License, Version 2.0 (the "License");
;; you may not use this file except in compliance with the License.
;; You may obtain a copy of the License at
;;
;; http://www.apache.org/licenses/LICENSE-2.0
;;
;; Unless required by applicable law or agreed to in writing, software
;; distributed under the License is distributed on an "AS IS" BASIS,
;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;; See the License for the specific language governing permissions and
;; limitations under the License.
(module
(memory 40000000 4)
(func $multiply (param i32) (param i32) (result i32)
(local i32 i32 i32 i32 i32 i32)
;; Locals are:
;; 0 is the parameter: n.
;; 1 is the parameter: a.
;; 2 is for the first matrix n * n.
;; 3 is for the second matrix n * n.
;; 4 is for the third matrix n * n.
;; 5 ~ 7 are temps/IVs.
(block
;; Calculate size of each n * n matrix.
(set_local 6 (i32.mul
(i32.mul (get_local 0) (get_local 0))
(i32.const 4)))
;; Get pointers for each matrix.
(set_local 2 (i32.const 0))
(set_local 3 (get_local 6))
(set_local 4 (i32.add (get_local 2) (get_local 6)))
(set_local 5 (i32.const 0))
;; Multiply by 4 to match IV's increments.
(set_local 7 (i32.mul (get_local 0) (i32.const 4)))
(label
;; Outer loop.
(loop
(if_else
(i32.eq (get_local 5) (get_local 7))
(br 1)
(block
;; Set inner IV to 0.
(set_local 6 (i32.const 0))
(label
;; Inner loop.
(loop
(if_else
(i32.eq (get_local 6) (get_local 7))
(br 1)
(block
(i32.store (get_local 4)
(i32.add
(i32.mul (get_local 1)
(i32.load (get_local 2)))
(i32.load (get_local 3))))
;; Augment IVs and pointers.
(set_local 2 (i32.add (get_local 2) (i32.const 4)))
(set_local 3 (i32.add (get_local 3) (i32.const 4)))
(set_local 4 (i32.add (get_local 4) (i32.const 4)))
(set_local 6 (i32.add (get_local 6) (i32.const 4)))
)
)
;; Next iteration.
(br 0)
)
)
(set_local 5 (i32.add (get_local 5) (i32.const 4)))
)
)
;; Next iteration.
(br 0)
)
)
(set_local 7 (i32.div (get_local 0) (i32.const 2)))
(set_local 6 (i32.add
(i32.mul
(i32.mul (get_local 7) (get_local 0))
(i32.const 4))
(i32.mul
(get_local 7)
(i32.const 4))))
) ;; Function block end.
(return (i32.load (get_local 6)))
)
(func $setter (param i32) (result i32)
(local i32 i32 i32 i32 i32 i32 i32)
(block
;; Calculate size of each n * n matrix.
(set_local 6 (i32.mul
(i32.mul (get_local 0) (get_local 0))
(i32.const 4)))
;; Get pointers for each matrix.
(set_local 2 (i32.const 0))
(set_local 3 (get_local 6))
;; Multiply by 4 to match IV's increments.
(set_local 6 (i32.mul (get_local 0) (i32.const 4)))
(set_local 4 (i32.const 0))
(label
;; Outer loop.
(loop
(if_else
(i32.eq (get_local 4) (get_local 6))
(br 1)
(block
;; Set inner IV to 0.
(set_local 5 (i32.const 0))
(label
;; Inner loop.
(loop
(if_else
(i32.eq (get_local 5) (get_local 6))
(br 1)
(block
;; Calculate the address: i * n + j
;; which means local(4) * n + local(5)
(set_local 7 (i32.add
(i32.mul
(get_local 4)
(get_local 0))
(get_local 5)))
;; Set i * j at that cell for matrix starting at local(2).
(i32.store (i32.add (get_local 2) (get_local 7))
(i32.div
(i32.mul (get_local 4) (get_local 5))
(i32.const 16)
)
)
;; Set i * j at that cell for matrix starting at local(3).
(i32.store (i32.add (get_local 3) (get_local 7))
(i32.div
(i32.mul (get_local 4) (get_local 5))
(i32.const 16)
)
)
;; Augment IVs.
(set_local 5 (i32.add (get_local 5) (i32.const 4)))
)
)
;; Next iteration.
(br 0)
)
)
(set_local 4 (i32.add (get_local 4) (i32.const 4)))
)
)
;; Next iteration.
(br 0)
)
)
) ;; Function block end.
(return (i32.const 0))
)
(export "multiply" $multiply)
(export "setter" $setter)
)
(assert_return (invoke "setter" (i32.const 1000)) (i32.const 0))
(assert_return (invoke "multiply" (i32.const 1000) (i32.const 1000)) (i32.const 250000))