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0a19c2f1c7
wasm: update to wat syntax as of Jan 2019. Examples: - get_local -> local.get - i32.wrap/i64 -> i32.warp_i64 - etc The distinction between wat and wast has been clarified: - wat: textual format for web assembly modules - wast: superset of wat used in the specification to define tests.
237 lines
6.6 KiB
Plaintext
237 lines
6.6 KiB
Plaintext
(module $step2_eval
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(global $repl_env (mut i32) (i32.const 0))
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;; READ
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(func $READ (param $str i32) (result i32)
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($read_str $str)
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)
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;; EVAL
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(func $EVAL_AST (param $ast i32 $env i32) (result i32)
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(local $res2 i64)
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(LET $res 0 $val2 0 $val3 0 $type 0 $found 0
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$ret 0 $empty 0 $current 0)
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(if (global.get $error_type) (return 0))
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(local.set $type ($TYPE $ast))
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;;($PR_VALUE ">>> EVAL_AST ast: '%s'\n" $ast)
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;;; switch(type)
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(block $done
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(block $default (block (block
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(br_table 2 2 2 2 2 0 1 1 1 2 2 2 2 2 2 2 $type))
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;; symbol
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;; found/res returned as hi 32/lo 32 of i64
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(local.set $res2 ($HASHMAP_GET $env $ast))
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(local.set $res (i32.wrap_i64 $res2))
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(local.set $found (i32.wrap_i64 (i64.shr_u $res2
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(i64.const 32))))
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(if (i32.eqz $found)
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($THROW_STR_1 "'%s' not found"
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($to_String $ast)))
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(local.set $res ($INC_REF $res))
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(br $done))
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;; list, vector, hashmap
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;; MAP_LOOP_START
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(local.set $res ($MAP_LOOP_START $type))
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;; push MAP_LOOP stack
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;;; empty = current = ret = res
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(local.set $ret $res)
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(local.set $current $res)
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(local.set $empty $res)
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(block $done
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(loop $loop
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;; check if we are done evaluating the source sequence
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(br_if $done (i32.eq ($VAL0 $ast) 0))
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(if (i32.eq $type (global.get $HASHMAP_T))
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(then
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(local.set $res ($EVAL ($MEM_VAL2_ptr $ast) $env)))
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(else
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(local.set $res ($EVAL ($MEM_VAL1_ptr $ast) $env))))
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(local.set $val2 $res)
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;; if error, release the unattached element
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(if (global.get $error_type)
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(then
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($RELEASE $res)
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(local.set $res 0)
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(br $done)))
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;; for hash-maps, copy the key (inc ref since we are going
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;; to release it below)
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(if (i32.eq $type (global.get $HASHMAP_T))
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(then
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(local.set $val3 $val2)
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(local.set $val2 ($MEM_VAL1_ptr $ast))
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(drop ($INC_REF $val2))))
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;; MAP_LOOP_UPDATE
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(local.set $res ($MAP_LOOP_UPDATE $type $empty $current $val2 $val3))
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(if (i32.le_u $current (global.get $EMPTY_HASHMAP))
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;; if first element, set return to new element
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(local.set $ret $res))
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;; update current to point to new element
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(local.set $current $res)
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(local.set $ast ($MEM_VAL0_ptr $ast))
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(br $loop)
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)
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)
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;; MAP_LOOP_DONE
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(local.set $res $ret)
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;; EVAL_AST_RETURN: nothing to do
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(br $done))
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;; default
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(local.set $res ($INC_REF $ast))
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)
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$res
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)
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(type $fnT (func (param i32) (result i32)))
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(table funcref
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(elem
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$add $subtract $multiply $divide))
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(func $EVAL (param $ast i32 $env i32) (result i32)
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(LET $res 0
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$ftype 0 $f_args 0 $f 0 $args 0)
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(local.set $f_args 0)
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(local.set $f 0)
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(local.set $args 0)
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(if (global.get $error_type) (return 0))
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;;($PR_VALUE ">>> EVAL ast: '%s'\n" $ast)
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(if (i32.ne ($TYPE $ast) (global.get $LIST_T))
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(return ($EVAL_AST $ast $env)))
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;; APPLY_LIST
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(if ($EMPTY_Q $ast)
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(return ($INC_REF $ast)))
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;; EVAL_INVOKE
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(local.set $res ($EVAL_AST $ast $env))
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(local.set $f_args $res)
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;; if error, return f/args for release by caller
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(if (global.get $error_type)
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(return $f_args))
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(local.set $args ($MEM_VAL0_ptr $f_args)) ;; rest
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(local.set $f ($MEM_VAL1_ptr $f_args)) ;; value
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(local.set $ftype ($TYPE $f))
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(if (i32.eq $ftype (global.get $FUNCTION_T))
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(then
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(local.set $res (call_indirect (type $fnT) $args ($VAL0 $f))))
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(else
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($THROW_STR_1 "apply of non-function type: %d\n" $ftype)
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(local.set $res 0)))
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($RELEASE $f_args)
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$res
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)
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;; PRINT
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(func $PRINT (param $ast i32) (result i32)
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($pr_str $ast 1)
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)
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;; REPL
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(func $REP (param $line i32 $env i32) (result i32)
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(LET $mv1 0 $mv2 0 $ms 0)
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(block $done
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(local.set $mv1 ($READ $line))
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(br_if $done (global.get $error_type))
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(local.set $mv2 ($EVAL $mv1 $env))
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(br_if $done (global.get $error_type))
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;; ($PR_MEMORY -1 -1)
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(local.set $ms ($PRINT $mv2))
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)
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;; release memory from MAL_READ and EVAL
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($RELEASE $mv2)
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($RELEASE $mv1)
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$ms
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)
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(func $add (param $args i32) (result i32)
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($INTEGER
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(i32.add ($VAL0 ($MEM_VAL1_ptr $args))
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($VAL0 ($MEM_VAL1_ptr ($MEM_VAL0_ptr $args))))))
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(func $subtract (param $args i32) (result i32)
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($INTEGER
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(i32.sub ($VAL0 ($MEM_VAL1_ptr $args))
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($VAL0 ($MEM_VAL1_ptr ($MEM_VAL0_ptr $args))))))
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(func $multiply (param $args i32) (result i32)
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($INTEGER
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(i32.mul ($VAL0 ($MEM_VAL1_ptr $args))
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($VAL0 ($MEM_VAL1_ptr ($MEM_VAL0_ptr $args))))))
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(func $divide (param $args i32) (result i32)
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($INTEGER
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(i32.div_s ($VAL0 ($MEM_VAL1_ptr $args))
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($VAL0 ($MEM_VAL1_ptr ($MEM_VAL0_ptr $args))))))
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(func $main (result i32)
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(LET $line (STATIC_ARRAY 201)
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$res 0 $repl_env 0)
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;; DEBUG
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;; ($printf_1 "memoryBase: 0x%x\n" (global.get $memoryBase))
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;; ($printf_1 "heap_start: 0x%x\n" (global.get $heap_start))
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;; ($printf_1 "heap_end: 0x%x\n" (global.get $heap_end))
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;; ($printf_1 "mem: 0x%x\n" (global.get $mem))
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;; ($printf_1 "string_mem: %d\n" (global.get $string_mem))
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(global.set $repl_env ($HASHMAP))
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(local.set $repl_env (global.get $repl_env))
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(local.set $repl_env ($ASSOC1_S $repl_env "+" ($FUNCTION 0)))
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(local.set $repl_env ($ASSOC1_S $repl_env "-" ($FUNCTION 1)))
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(local.set $repl_env ($ASSOC1_S $repl_env "*" ($FUNCTION 2)))
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(local.set $repl_env ($ASSOC1_S $repl_env "/" ($FUNCTION 3)))
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;;($PR_MEMORY -1 -1)
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;; Start REPL
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(block $repl_done
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(loop $repl_loop
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(br_if $repl_done (i32.eqz ($readline "user> " $line)))
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(br_if $repl_loop (i32.eq (i32.load8_u $line) 0))
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(local.set $res ($REP $line $repl_env))
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(if (global.get $error_type)
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(then
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($printf_1 "Error: %s\n" (global.get $error_str))
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(global.set $error_type 0))
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(else
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($printf_1 "%s\n" ($to_String $res))))
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($RELEASE $res)
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;;($PR_MEMORY_SUMMARY_SMALL)
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(br $repl_loop)
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)
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)
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($print "\n")
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;;($PR_MEMORY -1 -1)
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0
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)
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(export "_main" (func $main))
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(export "__post_instantiate" (func $init_memory))
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)
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