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emuwasm.js
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#!/usr/bin/env node
const WST_OFFSET = 0x100000;
const RST_OFFSET = 0x100100;
const IO_OFFSET = 0x100200;
const STATE_OFFSET = 0x10020f;
const MEMORY_SIZE = 0x100300;
const instructions = [
[
"BRK",
`
`,
],
[
"INC",
`
(local.set $t (#T))
(#set 1 0)
(#T! (i32.add (local.get $t) (i32.const 1)))
`,
],
[
"POP",
`
(#set 1 -1)
`,
],
[
"NIP",
`
(local.set $t (#T))
(#set 2 -1)
(#T! (local.get $t))
`,
],
[
"SWP",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 0)
(#T! (local.get $n))
(#N! (local.get $t))
`,
],
[
"ROT",
`
(local.set $t (#T))
(local.set $n (#N))
(local.set $l (#L))
(#set 3 0)
(#T! (local.get $l))
(#N! (local.get $t))
(#L! (local.get $n))
`,
],
[
"DUP",
`
(local.set $t (#T))
(#set 1 1)
(#T! (local.get $t))
(#N! (local.get $t))
`,
],
[
"OVR",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 1)
(#T! (local.get $n))
(#N! (local.get $t))
(#L! (local.get $n))
`,
],
[
"EQU",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.eq (local.get $t) (local.get $n)))
`,
],
[
"NEQ",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.ne (local.get $t) (local.get $n)))
`,
],
[
"GTH",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.gt_u (local.get $n) (local.get $t)))
`,
],
[
"LTH",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.lt_u (local.get $n) (local.get $t)))
`,
],
[
"JMP",
`
(local.set $t (#Ts))
(#set 1 -1)
(local.set $pc (i32.add (local.get $pc) (local.get $t)))
`,
],
[
"JCN",
`
(local.set $t (#Ts))
(local.set $n (#N))
(#set 2 -2)
(local.set $pc (i32.add (local.get $pc) (select (local.get $t) (i32.const 0) (local.get $n))))
`,
],
[
"JSR",
`
(local.set $t (#Ts))
(#set 1 -1)
(#~set 0 2)
(#~T2! (local.get $pc))
(local.set $pc (i32.add (local.get $pc) (local.get $t)))
`,
],
[
"STH",
`
(local.set $t (#T))
(#set 1 -1)
(#~set 0 1)
(#~T! (local.get $t))
`,
],
[
"LDZ",
`
(local.set $t (#T))
(#set 1 0)
(#T! (i32.load8_u (local.get $t)))
`,
],
[
"STZ",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -2)
(i32.store8 (local.get $t) (local.get $n))
`,
],
[
"LDR",
`
(local.set $t (#Ts))
(#set 1 0)
(#T! (i32.load8_u (i32.add (local.get $pc) (local.get $t))))
`,
],
[
"STR",
`
(local.set $t (#Ts))
(local.set $n (#N))
(#set 2 -2)
(i32.store8 (i32.add (local.get $pc) (local.get $t)) (local.get $n))
`,
],
[
"LDA",
`
(local.set $t (#T2))
(#set 2 -1)
(#T! (i32.load8_u (local.get $t)))
`,
],
[
"STA",
`
(local.set $t (#T2))
(local.set $n (#L))
(#set 3 -3)
(i32.store8 (local.get $t) (local.get $n))
`,
],
[
"DEI",
`
(local.set $t (#T))
(#set 1 0)
(#T! (call $dei (local.get $t)))
`,
],
[
"DEO",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -2)
(i32.store8 offset=0x${IO_OFFSET.toString(16)} (local.get $t) (local.get $n))
(call $deo (local.get $t) (local.get $n))
`,
],
[
"ADD",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.add (local.get $n) (local.get $t)))
`,
],
[
"SUB",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.sub (local.get $n) (local.get $t)))
`,
],
[
"MUL",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.mul (local.get $n) (local.get $t)))
`,
],
[
"DIV",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (if (result i32) (i32.eqz (local.get $t)) (then (i32.const 0)) (else (i32.div_u (local.get $n) (local.get $t)))))
`,
],
[
"AND",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.and (local.get $n) (local.get $t)))
`,
],
[
"ORA",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.or (local.get $n) (local.get $t)))
`,
],
[
"EOR",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.xor (local.get $n) (local.get $t)))
`,
],
[
"SFT",
`
(local.set $t (#T))
(local.set $n (#N))
(#set 2 -1)
(#T! (i32.shl (i32.shr_u (local.get $n) (i32.and (local.get $t) (i32.const 0xf))) (i32.shr_u (local.get $t) (i32.const 4))))
`,
],
[
"JCI",
`
(local.set $t (#T))
(#set 0 -1)
(if (local.get $t) (then (local.set $pc (i32.add (i32.const 2) (i32.and (i32.add (local.get $pc) (#peek16 (local.get $pc))) (i32.const 0xffff))))) (else (local.set $pc (i32.add (local.get $pc) (i32.const 2)))))
`,
],
[
"INC2",
`
(local.set $t (#T2))
(#set 2 0)
(#T2! (i32.add (local.get $t) (i32.const 1)))
`,
],
[
"POP2",
`
(#set 2 -2)
`,
],
[
"NIP2",
`
(local.set $t (#T2))
(#set 4 -2)
(#T2! (local.get $t))
`,
],
[
"SWP2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 0)
(#T2! (local.get $n))
(#N2! (local.get $t))
`,
],
[
"ROT2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(local.set $l (#L2))
(#set 6 0)
(#T2! (local.get $l))
(#N2! (local.get $t))
(#L2! (local.get $n))
`,
],
[
"DUP2",
`
(local.set $t (#T2))
(#set 2 2)
(#T2! (local.get $t))
(#N2! (local.get $t))
`,
],
[
"OVR2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 2)
(#T2! (local.get $n))
(#N2! (local.get $t))
(#L2! (local.get $n))
`,
],
[
"EQU2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -3)
(#T! (i32.eq (local.get $t) (local.get $n)))
`,
],
[
"NEQ2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -3)
(#T! (i32.ne (local.get $t) (local.get $n)))
`,
],
[
"GTH2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -3)
(#T! (i32.gt_u (local.get $n) (local.get $t)))
`,
],
[
"LTH2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -3)
(#T! (i32.lt_u (local.get $n) (local.get $t)))
`,
],
[
"JMP2",
`
(local.set $t (#T2))
(#set 2 -2)
(local.set $pc (local.get $t))
`,
],
[
"JCN2",
`
(local.set $t (#T2))
(local.set $n (#L))
(#set 3 -3)
(local.set $pc (select (local.get $t) (local.get $pc) (local.get $n)))
`,
],
[
"JSR2",
`
(local.set $t (#T2))
(#set 2 -2)
(#~set 0 2)
(#~T2! (local.get $pc))
(local.set $pc (local.get $t))
`,
],
[
"STH2",
`
(local.set $t (#T2))
(#set 2 -2)
(#~set 0 2)
(#~T2! (local.get $t))
`,
],
[
"LDZ2",
`
(local.set $t (#T))
(#set 1 1)
(#T2<zmem! (local.get $t))
`,
],
[
"STZ2",
`
(local.set $t (#T))
(local.set $n (#N))
(local.set $l (#L))
(#set 3 -3)
(#poke2z (local.get $t) (local.get $l) (local.get $n))
`,
],
[
"LDR2",
`
(local.set $t (#Ts))
(#set 1 1)
(#T2<meme! (i32.add (local.get $pc) (local.get $t)))
`,
],
[
"STR2",
`
(local.set $t (#Ts))
(local.set $n (#N))
(local.set $l (#L))
(#set 3 -3)
(#poke2e (i32.add (local.get $pc) (local.get $t)) (local.get $l) (local.get $n))
`,
],
[
"LDA2",
`
(local.set $t (#T2))
(#set 2 0)
(#T2<mem! (local.get $t))
`,
],
[
"STA2",
`
(local.set $t (#T2))
(local.set $n (#L))
(local.set $l (#X))
(#set 4 -4)
(#poke2 (local.get $t) (local.get $l) (local.get $n))
`,
],
[
"DEI2",
`
(local.set $t (#T))
(#set 1 1)
(#T! (call $dei (i32.and (i32.add (local.get $t) (i32.const 1)) (i32.const 0xff))))
(#N! (call $dei (local.get $t)))
`,
],
[
"DEO2",
`
(local.set $t (#T))
(local.set $n (#N))
(local.set $l (#L))
(#set 3 -3)
(i32.store8 offset=0x${IO_OFFSET.toString(16)} (local.get $t) (local.get $l))
(call $deo (local.get $t) (local.get $l))
(i32.store8 offset=0x${IO_OFFSET.toString(
16
)} (local.tee $t (i32.and (i32.add (local.get $t) (i32.const 1)) (i32.const 0xff))) (local.get $n))
(call $deo (local.get $t) (local.get $n))
`,
],
[
"ADD2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.add (local.get $n) (local.get $t)))
`,
],
[
"SUB2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.sub (local.get $n) (local.get $t)))
`,
],
[
"MUL2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.mul (local.get $n) (local.get $t)))
`,
],
[
"DIV2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (if (result i32) (i32.eqz (local.get $t)) (then (i32.const 0)) (else (i32.div_u (local.get $n) (local.get $t)))))
`,
],
[
"AND2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.and (local.get $n) (local.get $t)))
`,
],
[
"ORA2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.or (local.get $n) (local.get $t)))
`,
],
[
"EOR2",
`
(local.set $t (#T2))
(local.set $n (#N2))
(#set 4 -2)
(#T2! (i32.xor (local.get $n) (local.get $t)))
`,
],
[
"SFT2",
`
(local.set $t (#T))
(local.set $n (#H2))
(#set 3 -1)
(#T2! (i32.shl (i32.shr_u (local.get $n) (i32.and (local.get $t) (i32.const 0xf))) (i32.shr_u (local.get $t) (i32.const 4))))
`,
],
[
"JMI",
`
(local.set $pc (i32.add (i32.const 2) (i32.and (i32.add (local.get $pc) (#peek16 (local.get $pc))) (i32.const 0xffff))))
`,
],
["INCr", null],
["POPr", null],
["NIPr", null],
["SWPr", null],
["ROTr", null],
["DUPr", null],
["OVRr", null],
["EQUr", null],
["NEQr", null],
["GTHr", null],
["LTHr", null],
["JMPr", null],
["JCNr", null],
["JSRr", null],
["STHr", null],
["LDZr", null],
["STZr", null],
["LDRr", null],
["STRr", null],
["LDAr", null],
["STAr", null],
["DEIr", null],
["DEOr", null],
["ADDr", null],
["SUBr", null],
["MULr", null],
["DIVr", null],
["ANDr", null],
["ORAr", null],
["EORr", null],
["SFTr", null],
[
"JSI",
`
(#set 0 2)
(#T2! (local.tee $n (i32.add (local.get $pc) (i32.const 2))))
(local.set $pc (i32.and (i32.add (local.get $n) (#peek16 (local.get $pc))) (i32.const 0xffff)))
`,
],
["INC2r", null],
["POP2r", null],
["NIP2r", null],
["SWP2r", null],
["ROT2r", null],
["DUP2r", null],
["OVR2r", null],
["EQU2r", null],
["NEQ2r", null],
["GTH2r", null],
["LTH2r", null],
["JMP2r", null],
["JCN2r", null],
["JSR2r", null],
["STH2r", null],
["LDZ2r", null],
["STZ2r", null],
["LDR2r", null],
["STR2r", null],
["LDA2r", null],
["STA2r", null],
["DEI2r", null],
["DEO2r", null],
["ADD2r", null],
["SUB2r", null],
["MUL2r", null],
["DIV2r", null],
["AND2r", null],
["ORA2r", null],
["EOR2r", null],
["SFT2r", null],
[
"LIT",
`
(#set 0 1)
(#T! (i32.load8_u (local.get $pc)))
(local.set $pc (i32.add (local.get $pc) (i32.const 1)))
`,
],
["INCk", null],
["POPk", null],
["NIPk", null],
["SWPk", null],
["ROTk", null],
["DUPk", null],
["OVRk", null],
["EQUk", null],
["NEQk", null],
["GTHk", null],
["LTHk", null],
["JMPk", null],
["JCNk", null],
["JSRk", null],
["STHk", null],
["LDZk", null],
["STZk", null],
["LDRk", null],
["STRk", null],
["LDAk", null],
["STAk", null],
["DEIk", null],
["DEOk", null],
["ADDk", null],
["SUBk", null],
["MULk", null],
["DIVk", null],
["ANDk", null],
["ORAk", null],
["EORk", null],
["SFTk", null],
[
"LIT2",
`
(#set 0 2)
(#T2<mem! (local.get $pc))
(local.set $pc (i32.add (local.get $pc) (i32.const 2)))
`,
],
["INC2k", null],
["POP2k", null],
["NIP2k", null],
["SWP2k", null],
["ROT2k", null],
["DUP2k", null],
["OVR2k", null],
["EQU2k", null],
["NEQ2k", null],
["GTH2k", null],
["LTH2k", null],
["JMP2k", null],
["JCN2k", null],
["JSR2k", null],
["STH2k", null],
["LDZ2k", null],
["STZ2k", null],
["LDR2k", null],
["STR2k", null],
["LDA2k", null],
["STA2k", null],
["DEI2k", null],
["DEO2k", null],
["ADD2k", null],
["SUB2k", null],
["MUL2k", null],
["DIV2k", null],
["AND2k", null],
["ORA2k", null],
["EOR2k", null],
["SFT2k", null],
["LITr", null],
["INCkr", null],
["POPkr", null],
["NIPkr", null],
["SWPkr", null],
["ROTkr", null],
["DUPkr", null],
["OVRkr", null],
["EQUkr", null],
["NEQkr", null],
["GTHkr", null],
["LTHkr", null],
["JMPkr", null],
["JCNkr", null],
["JSRkr", null],
["STHkr", null],
["LDZkr", null],
["STZkr", null],
["LDRkr", null],
["STRkr", null],
["LDAkr", null],
["STAkr", null],
["DEIkr", null],
["DEOkr", null],
["ADDkr", null],
["SUBkr", null],
["MULkr", null],
["DIVkr", null],
["ANDkr", null],
["ORAkr", null],
["EORkr", null],
["SFTkr", null],
["LIT2r", null],
["INC2kr", null],
["POP2kr", null],
["NIP2kr", null],
["SWP2kr", null],
["ROT2kr", null],
["DUP2kr", null],
["OVR2kr", null],
["EQU2kr", null],
["NEQ2kr", null],
["GTH2kr", null],
["LTH2kr", null],
["JMP2kr", null],
["JCN2kr", null],
["JSR2kr", null],
["STH2kr", null],
["LDZ2kr", null],
["STZ2kr", null],
["LDR2kr", null],
["STR2kr", null],
["LDA2kr", null],
["STA2kr", null],
["DEI2kr", null],
["DEO2kr", null],
["ADD2kr", null],
["SUB2kr", null],
["MUL2kr", null],
["DIV2kr", null],
["AND2kr", null],
["ORA2kr", null],
["EOR2kr", null],
["SFT2kr", null],
];
function generate() {
const docs = getDocumentation();
let out = `(module $uxn
(import "system" "deo" (func $deo (param i32) (param i32)))
(import "system" "dei" (func $dei (param i32) (result i32)))
(func (export "eval") (param $pc i32)
(local $wstp i32)
(local $rstp i32)
(local $t i32)
(local $n i32)
(local $l i32)
(local $val i32)
(local $mval i32)
;; Check PC and \`state\` ( https://wiki.xxiivv.com/site/varvara.html#system )
(if (i32.eqz (local.get $pc)) (then (return)))
(if (i32.load8_u (i32.const 0x${STATE_OFFSET.toString(
16
)})) (then (return)))
(local.set $wstp (global.get $wstp))
(local.set $rstp (global.get $rstp))
(block $endLoop
(loop $loop
(local.set $val (i32.load8_u (local.get $pc)))
(local.set $pc (i32.add (local.get $pc) (i32.const 1)))
;; Uxntal Opcodes (https://wiki.xxiivv.com/site/uxntal_opcodes.html)
;;
;; Opcode documentation below includes stack effects on a given stack a b c.
;; | denotes the effect on the return Stack.
;; For the \`r\` variants, the stack effect describes the reset stack effect, and
;; | the working stack effect.
`;
instructions
.slice()
.reverse()
.forEach((ins, i) => {
if (i % 16 === 0) {
out += "\n ";
}
out += `(block $${ins[0]} `.padEnd(15);
});
out += "\n";
out += " (br_table";
instructions.forEach((ins, i) => {
if (i % 16 === 0) {
out += "\n ";
}
out += `$${ins[0].padEnd(6, " ")} `;
});
out += "\n";
out += " $BRK\n";
out += " (local.get $val))\n\n";
instructions.forEach((inss, ins) => {
const insn = inss[0];
const doc = docs[insn.replace(/2?k?r?$/, "")];
const mode_keep = !!(ins & 0x80);
const mode_rst = !!(ins & 0x40);
out += ` );;\n`;
out += ` ;;; ${insn} (${sig(doc.sig, mode_keep, mode_rst)}) [0x${ins
.toString(16)
.padStart(2, 0)}]\n`;
out += ` ;;;\n`;
out += ` ;;; ${doc.title}\n`;
out += ` ;;;\n`;
for (const d of linebreak(doc.description).split("\n")) {
out += ` ;;; ${d}\n`;
}
const ex = filterExamples(doc.examples, insn);
if (ex.length) {
out += ` ;;;\n`;
if (ex.length > 1) {
out += ` ;;; Examples:\n`;
} else {
out += ` ;;; Example:\n`;
}
for (const d of ex) {
out += ` ;;; ${d}\n`;
}
}
out += ` ;;;\n`;
let code;
if (inss[1] != null) {
code = inss[1].slice(1);
} else {
code = instructions[ins & 0x1f ? ins & 0x3f : ins & 0xa0][1].slice(1);
}
const macros = [
[
"peek16",
`(i32.or (i32.shl (i32.load8_u #1) (i32.const 8)) (i32.load8_u (i32.and (i32.add #1 (i32.const 1)) (i32.const 0xffff))))`,
],
[
"poke2",
`(i32.store8 #1 #2) (i32.store8 (i32.and (i32.add #1 (i32.const 1)) (i32.const 0xffff)) #3)`,
],
// with an expression address
[
"poke2e",
`(i32.store8 (local.tee $mval (i32.and #1 (i32.const 0xffff))) #2) (i32.store8 (i32.and (i32.add (local.get $mval) (i32.const 1)) (i32.const 0xffff)) #3)`,
],
// zero-page (not wrapping)
[
"poke2z",
`(i32.store8 #1 #2) (i32.store8 (i32.and (i32.add #1 (i32.const 1)) (i32.const 0xff)) #3)`,
],
];
for (const [regname, regidx] of [
["T", 0],
["N", 2],
["L", 4],
["X", 6],
["H", 1],
]) {
let reg = regname;
for (const flip of [false, true]) {
const stack = mode_rst ^ flip ? "rst" : "wst";
const offset =
"0x" + (mode_rst ^ flip ? RST_OFFSET : WST_OFFSET).toString(16);
reg = (flip ? "~" : "") + reg;
macros.push(
...[
[
reg + "2!",
`(i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${regidx})) (i32.const 0xff)) (i32.and (local.tee $val #1) (i32.const 0xff))) (i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx + 1
})) (i32.const 0xff)) (i32.shr_u (local.get $val) (i32.const 8)))`,
],
[
// Copy from memory
reg + "2<mem!",
`(i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx + 1
})) (i32.const 0xff)) (i32.load8_u #1)) (i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${regidx})) (i32.const 0xff)) (i32.load8_u (i32.and (i32.add #1 (i32.const 1)) (i32.const 0xffff))))`,
],
[
// Copy from zero-page memory
reg + "2<zmem!",
`(i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx + 1
})) (i32.const 0xff)) (i32.load8_u #1)) (i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${regidx})) (i32.const 0xff)) (i32.load8_u (i32.and (i32.add #1 (i32.const 1)) (i32.const 0xff))))`,
],
[
// Copy from memory (with expression)
reg + "2<meme!",
`(i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx + 1
})) (i32.const 0xff)) (i32.load8_u (local.tee $mval #1))) (i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${regidx})) (i32.const 0xff)) (i32.load8_u (i32.and (i32.add (local.get $mval) (i32.const 1)) (i32.const 0xffff))))`,
],
[
reg + "2",
`(i32.or (i32.load8_u offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${regidx})) (i32.const 0xff))) (i32.shl (i32.load8_u offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx + 1
})) (i32.const 0xff))) (i32.const 8)))`,
],
...(regidx % 2 === 0
? [
[
reg + "!",
`(i32.store8 offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx / 2
})) (i32.const 0xff)) #1)`,
],
[
reg,
`(i32.load8_u offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx / 2
})) (i32.const 0xff)))`,
],
[
reg + "s",
`(i32.load8_s offset=${offset} (i32.and (i32.add (local.get $${stack}p) (i32.const ${
regidx / 2
})) (i32.const 0xff)))`,
],
]
: []),
]
);
}
}
let ncode = "";
for (let c of code.split("\n")) {
let exprs = parseSExpressions(c);
for (const [macro, macrodef] of macros) {
exprs = exprs
.map((expr) =>
replaceMacro(expr, macro, (args) =>