diff options
Diffstat (limited to 'shell/evaluate.mu')
| -rw-r--r-- | shell/evaluate.mu | 126 |
1 files changed, 63 insertions, 63 deletions
diff --git a/shell/evaluate.mu b/shell/evaluate.mu index d4f13407..63b2c5f4 100644 --- a/shell/evaluate.mu +++ b/shell/evaluate.mu @@ -1,8 +1,8 @@ # env is an alist of ((sym . val) (sym . val) ...) -# we never modify `in` or `env` +# we never modify `_in-ah` or `env` # ignore args past 'trace' on a first reading; they're for the environment not the language # 'call-number' is just for showing intermediate progress; this is a _slow_ interpreter -fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cell), globals: (addr global-table), trace: (addr trace), screen-cell: (addr handle cell), keyboard-cell: (addr handle cell), call-number: int { +fn evaluate _in-ah: (addr handle cell), _out-ah: (addr handle cell), env-h: (handle cell), globals: (addr global-table), trace: (addr trace), screen-cell: (addr handle cell), keyboard-cell: (addr handle cell), call-number: int { # stack overflow? # disable when enabling Really-debug-print check-stack { @@ -24,7 +24,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel break-if-= return } - var in/esi: (addr handle cell) <- copy _in + var in-ah/esi: (addr handle cell) <- copy _in-ah # show intermediate progress on screen if necessary { compare screen-cell, 0 @@ -43,7 +43,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel break-if-= var y/ecx: int <- render-screen 0/screen, screen-obj, 0x70/xmin, 1/ymin } -#? dump-cell in +#? dump-cell in-ah #? { #? var foo/eax: byte <- read-key 0/keyboard #? compare foo, 0 @@ -56,7 +56,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var stream-storage: (stream byte 0x200) var stream/ecx: (addr stream byte) <- address stream-storage write stream, "evaluate " - print-cell in, stream, 0/no-trace + print-cell in-ah, stream, 0/no-trace write stream, " in environment " var env-ah/eax: (addr handle cell) <- address env-h print-cell env-ah, stream, 0/no-trace @@ -64,24 +64,24 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel } # }}} trace-lower trace - var in-addr/eax: (addr cell) <- lookup *in + var in/eax: (addr cell) <- lookup *in-ah { - var nil?/eax: boolean <- nil? in-addr + var nil?/eax: boolean <- nil? in compare nil?, 0/false break-if-= # nil is a literal trace-text trace, "eval", "nil" - copy-object _in, out + copy-object _in-ah, _out-ah trace-higher trace return } - var in-type/ecx: (addr int) <- get in-addr, type + var in-type/ecx: (addr int) <- get in, type compare *in-type, 1/number { break-if-!= # numbers are literals trace-text trace, "eval", "number" - copy-object _in, out + copy-object _in-ah, _out-ah trace-higher trace return } @@ -90,7 +90,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel break-if-!= # streams are literals trace-text trace, "eval", "stream" - copy-object _in, out + copy-object _in-ah, _out-ah trace-higher trace return } @@ -99,7 +99,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel break-if-!= trace-text trace, "eval", "symbol" debug-print "a", 7/fg, 0xc5/bg=blue-bg - lookup-symbol in-addr, out, env-h, globals, trace, screen-cell, keyboard-cell + lookup-symbol in, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell debug-print "z", 7/fg, 0xc5/bg=blue-bg trace-higher trace return @@ -108,7 +108,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel { break-if-!= trace-text trace, "eval", "screen" - copy-object _in, out + copy-object _in-ah, _out-ah trace-higher trace return } @@ -116,54 +116,54 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel { break-if-!= trace-text trace, "eval", "keyboard" - copy-object _in, out + copy-object _in-ah, _out-ah trace-higher trace return } - # in-addr is a syntax tree + # in is a syntax tree $evaluate:anonymous-function: { # trees starting with "fn" are anonymous functions - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "fn", break - var in-addr/edx: (addr cell) <- copy in-addr - var first-ah/ecx: (addr handle cell) <- get in-addr, left + var in/edx: (addr cell) <- copy in + var first-ah/ecx: (addr handle cell) <- get in, left var first/eax: (addr cell) <- lookup *first-ah var fn?/eax: boolean <- fn? first compare fn?, 0/false break-if-= # turn (fn ...) into (fn env ...) trace-text trace, "eval", "anonymous function" - var rest-ah/eax: (addr handle cell) <- get in-addr, right + var rest-ah/eax: (addr handle cell) <- get in, right var tmp: (handle cell) var tmp-ah/edi: (addr handle cell) <- address tmp new-pair tmp-ah, env-h, *rest-ah - new-pair out, *first-ah, *tmp-ah + new-pair _out-ah, *first-ah, *tmp-ah trace-higher trace return } # builtins with "special" evaluation rules $evaluate:quote: { # trees starting with single quote create literals - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "'", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var quote?/eax: boolean <- symbol-equal? first, "'" compare quote?, 0/false break-if-= # trace-text trace, "eval", "quote" - copy-object rest-ah, out + copy-object rest-ah, _out-ah trace-higher trace return } $evaluate:def: { # trees starting with "def" define globals - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "def", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var def?/eax: boolean <- symbol-equal? first, "def" compare def?, 0/false @@ -187,7 +187,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var second-arg-ah/edx: (addr handle cell) <- get rest, left debug-print "P", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate second-arg-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate second-arg-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "Q", 4/fg, 0xc5/bg=blue-bg trace-text trace, "eval", "saving global binding" var first-arg/eax: (addr cell) <- lookup *first-arg-ah @@ -198,17 +198,17 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel rewind-stream first-arg-data stream-to-array first-arg-data, tmp-ah var first-arg-data-string/eax: (addr array byte) <- lookup *tmp-ah - var out2/edi: (addr handle cell) <- copy out - assign-or-create-global globals, first-arg-data-string, *out2, trace + var out-ah/edi: (addr handle cell) <- copy _out-ah + assign-or-create-global globals, first-arg-data-string, *out-ah, trace trace-higher trace return } $evaluate:set: { # trees starting with "set" mutate bindings - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "set", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var set?/eax: boolean <- symbol-equal? first, "set" compare set?, 0/false @@ -232,21 +232,21 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var second-arg-ah/edx: (addr handle cell) <- get rest, left debug-print "P", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate second-arg-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate second-arg-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "Q", 4/fg, 0xc5/bg=blue-bg trace-text trace, "eval", "mutating binding" var first-arg/eax: (addr cell) <- lookup *first-arg-ah var first-arg-data-ah/eax: (addr handle stream byte) <- get first-arg, text-data var first-arg-data/eax: (addr stream byte) <- lookup *first-arg-data-ah - mutate-binding first-arg-data, out, env-h, globals, trace + mutate-binding first-arg-data, _out-ah, env-h, globals, trace trace-higher trace return } $evaluate:and: { - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "and", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var and?/eax: boolean <- symbol-equal? first, "and" compare and?, 0/false @@ -258,12 +258,12 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var first-arg-ah/ecx: (addr handle cell) <- get rest, left debug-print "R2", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate first-arg-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate first-arg-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "S2", 4/fg, 0xc5/bg=blue-bg # if first arg is nil, short-circuit - var out-ah/eax: (addr handle cell) <- copy out - var out-a/eax: (addr cell) <- lookup *out-ah - var nil?/eax: boolean <- nil? out-a + var out-ah/eax: (addr handle cell) <- copy _out-ah + var out/eax: (addr cell) <- lookup *out-ah + var nil?/eax: boolean <- nil? out compare nil?, 0/false { break-if-= @@ -275,16 +275,16 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var second-ah/eax: (addr handle cell) <- get rest, left debug-print "T2", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate second-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate second-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "U2", 4/fg, 0xc5/bg=blue-bg trace-higher trace return } $evaluate:or: { - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "or", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var or?/eax: boolean <- symbol-equal? first, "or" compare or?, 0/false @@ -296,12 +296,12 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var first-arg-ah/ecx: (addr handle cell) <- get rest, left debug-print "R2", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate first-arg-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate first-arg-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "S2", 4/fg, 0xc5/bg=blue-bg # if first arg is not nil, short-circuit - var out-ah/eax: (addr handle cell) <- copy out - var out-a/eax: (addr cell) <- lookup *out-ah - var nil?/eax: boolean <- nil? out-a + var out-ah/eax: (addr handle cell) <- copy _out-ah + var out/eax: (addr cell) <- lookup *out-ah + var nil?/eax: boolean <- nil? out compare nil?, 0/false { break-if-!= @@ -313,17 +313,17 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var second-ah/eax: (addr handle cell) <- get rest, left debug-print "T2", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate second-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate second-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "U2", 4/fg, 0xc5/bg=blue-bg trace-higher trace return } $evaluate:if: { # trees starting with "if" are conditionals - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "if", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var if?/eax: boolean <- symbol-equal? first, "if" compare if?, 0/false @@ -355,17 +355,17 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel } debug-print "T", 4/fg, 0xc5/bg=blue-bg increment call-number - evaluate branch-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate branch-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number debug-print "U", 4/fg, 0xc5/bg=blue-bg trace-higher trace return } $evaluate:while: { # trees starting with "while" are loops - var expr/esi: (addr cell) <- copy in-addr + var expr/esi: (addr cell) <- copy in # if its first elem is not "while", break - var first-ah/ecx: (addr handle cell) <- get in-addr, left - var rest-ah/edx: (addr handle cell) <- get in-addr, right + var first-ah/ecx: (addr handle cell) <- get in, left + var rest-ah/edx: (addr handle cell) <- get in, right var first/eax: (addr cell) <- lookup *first-ah var first-type/ecx: (addr int) <- get first, type compare *first-type, 2/symbol @@ -399,7 +399,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var done?/eax: boolean <- nil? guard-a compare done?, 0/false break-if-!= - evaluate-exprs rest-ah, out, env-h, globals, trace, screen-cell, keyboard-cell, call-number + evaluate-exprs rest-ah, _out-ah, env-h, globals, trace, screen-cell, keyboard-cell, call-number loop } trace-text trace, "eval", "loop terminated" @@ -412,7 +412,7 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var evaluated-list-storage: (handle cell) var evaluated-list-ah/esi: (addr handle cell) <- address evaluated-list-storage var curr-out-ah/edx: (addr handle cell) <- copy evaluated-list-ah - var curr/ecx: (addr cell) <- copy in-addr + var curr/ecx: (addr cell) <- copy in $evaluate-list:loop: { allocate-pair curr-out-ah var nil?/eax: boolean <- nil? curr @@ -438,17 +438,17 @@ fn evaluate _in: (addr handle cell), out: (addr handle cell), env-h: (handle cel var function-ah/ecx: (addr handle cell) <- get evaluated-list, left var args-ah/edx: (addr handle cell) <- get evaluated-list, right debug-print "C", 4/fg, 0xc5/bg=blue-bg - apply function-ah, args-ah, out, globals, trace, screen-cell, keyboard-cell, call-number + apply function-ah, args-ah, _out-ah, globals, trace, screen-cell, keyboard-cell, call-number debug-print "Y", 4/fg, 0xc5/bg=blue-bg trace-higher trace - # trace "=> " out {{{ + # trace "=> " _out-ah {{{ { compare trace, 0 break-if-= var stream-storage: (stream byte 0x200) var stream/ecx: (addr stream byte) <- address stream-storage write stream, "=> " - print-cell out, stream, 0/no-trace + print-cell _out-ah, stream, 0/no-trace trace trace, "eval", stream } # }}} |