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ecs: var/init/const allocation

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Steven Hugg 2022-02-10 12:55:36 -06:00
parent fc0a43b9af
commit bea49e2b11
1 changed files with 24 additions and 23 deletions
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47
src/common/ecs/ecs.ts
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@ -941,29 +941,29 @@ export class EntityScope implements SourceLocated {
} }
} }
// TODO: cull unused entity fields // TODO: cull unused entity fields
allocateSegment(segment: DataSegment, readonly: boolean) { allocateSegment(segment: DataSegment, alloc: boolean, type: 'init' | 'const' | undefined) {
let fields: FieldArray[] = Object.values(segment.fieldranges); let fields: FieldArray[] = Object.values(segment.fieldranges);
// TODO: fields.sort((a, b) => (a.ehi - a.elo + 1) * getPackedFieldSize(a.field)); // TODO: fields.sort((a, b) => (a.ehi - a.elo + 1) * getPackedFieldSize(a.field));
let f: FieldArray | undefined; for (let f of fields) {
while (f = fields.pop()) { if (this.fieldtypes[mksymbol(f.component, f.field.name)] == type) {
let rangelen = (f.ehi - f.elo + 1); let rangelen = (f.ehi - f.elo + 1);
let alloc = !readonly; // TODO: doesn't work for packed arrays too well
// TODO: doesn't work for packed arrays too well let bits = getPackedFieldSize(f.field);
let bits = getPackedFieldSize(f.field); // variable size? make it a pointer
// variable size? make it a pointer if (bits == 0) bits = 16; // TODO?
if (bits == 0) bits = 16; // TODO? let bytesperelem = Math.ceil(bits / 8);
let bytesperelem = Math.ceil(bits / 8); // TODO: packing bits
// TODO: packing bits // TODO: split arrays
// TODO: split arrays let access = [];
let access = []; for (let i = 0; i < bits; i += 8) {
for (let i = 0; i < bits; i += 8) { let symbol = this.dialect.fieldsymbol(f.component, f.field, i);
let symbol = this.dialect.fieldsymbol(f.component, f.field, i); access.push({ symbol, bit: i, width: 8 }); // TODO
access.push({ symbol, bit: i, width: 8 }); // TODO if (alloc) {
if (alloc) { segment.allocateBytes(symbol, rangelen); // TODO
segment.allocateBytes(symbol, rangelen); // TODO }
} }
f.access = access;
} }
f.access = access;
} }
} }
allocateROData(segment: DataSegment) { allocateROData(segment: DataSegment) {
@ -1034,8 +1034,8 @@ export class EntityScope implements SourceLocated {
let initvalue = e.inits[scfname]; let initvalue = e.inits[scfname];
if (initvalue !== undefined) { if (initvalue !== undefined) {
let range = segment.getFieldRange(c, f.name); let range = segment.getFieldRange(c, f.name);
if (!range) throw new ECSError(`no range`, e); if (!range) throw new ECSError(`no init range for ${scfname}`, e);
if (!range.access) throw new ECSError(`no range access`, e); if (!range.access) throw new ECSError(`no init range access for ${scfname}`, e);
if (typeof initvalue === 'number') { if (typeof initvalue === 'number') {
for (let a of range.access) { for (let a of range.access) {
let offset = segment.getByteOffset(range, a, e.id); let offset = segment.getByteOffset(range, a, e.id);
@ -1172,8 +1172,9 @@ export class EntityScope implements SourceLocated {
} }
private analyzeEntities() { private analyzeEntities() {
this.buildSegments(); this.buildSegments();
this.allocateSegment(this.bss, false); this.allocateSegment(this.bss, true, undefined); // uninitialized vars
this.allocateSegment(this.rodata, true); this.allocateSegment(this.bss, true, 'init'); // initialized vars
this.allocateSegment(this.rodata, false, 'const'); // constants
this.allocateROData(this.rodata); this.allocateROData(this.rodata);
} }
private generateCode() { private generateCode() {