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[qfcc] Correct scaling and multivec sums

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Scaling now works for multi-vector expressions, and always subtracting
even when addition is wanted doesn't work too well. However, now there's
the problem of multi-vectors very quickly becoming full algebra vectors,
which means certain things need a rethink.
This commit is contained in:
Bill Currie 2023-08-21 20:10:13 +09:00
parent 2e91b29580
commit dfb719c92b
1 changed files with 9 additions and 5 deletions
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14
tools/qfcc/source/expr_algebra.c
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@ -56,17 +56,17 @@ scalar_product (expr_t *e1, expr_t *e2)
{
auto scalar = is_scalar (get_type (e1)) ? e1 : e2;
auto vector = is_scalar (get_type (e1)) ? e2 : e1;
if (vector->type == ex_vector) {
internal_error (vector, "multiproduce scale not implemented");
auto comp = vector->e.vector.list;
if (vector->type == ex_multivec) {
auto comp = vector->e.multivec.components;
auto prod = scalar_product (scalar, comp);
while (comp->next) {
comp = comp->next;
auto p = scalar_product (scalar, comp);
p = fold_constants (p);
p->next = prod;
prod = p;
}
return fold_constants (prod);
return prod;
} else {
auto vector_type = get_type (vector);
auto scalar_type = base_type (vector_type);
@ -127,7 +127,11 @@ component_sum (int op, expr_t **components, expr_t *e,
components[group] = new_binary_expr (op, components[group], e);
components[group]->e.expr.type = t;
} else {
components[group] = scalar_product (new_float_expr (-1), e);
if (op == '+') {
components[group] = e;
} else {
components[group] = scalar_product (new_float_expr (-1), e);
}
}
components[group] = fold_constants (components[group]);
}