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[qfcc] Implement multi-vector negation
That was surprisingly harder than expected due to recursion and a not-so-good implementation in expr_negate (it went too high-level thus resulting in multivec expressions getting to the code generator).
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parent
6b1684b711
commit
1329a1c43a
4 changed files with 34 additions and 5 deletions
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@ -1766,6 +1766,9 @@ unary_expr (int op, expr_t *e)
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case '-':
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if (!is_math (get_type (e)))
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return error (e, "invalid type for unary -");
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if (is_algebra (get_type (e))) {
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return algebra_negate (e);
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}
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if (is_constant (e)) {
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switch (extract_type (e)) {
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case ev_string:
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@ -1434,11 +1434,25 @@ algebra_binary_expr (int op, expr_t *e1, expr_t *e2)
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expr_t *
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algebra_negate (expr_t *e)
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{
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if (e) {
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internal_error (e, "not implemented");
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auto t = get_type (e);
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auto algebra = algebra_get (t);
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auto layout = &algebra->layout;
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expr_t *n[layout->count] = {};
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e = mvec_expr (e, algebra);
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mvec_scatter (n, e, algebra);
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for (int i = 0; i < layout->count; i++) {
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if (!n[i]) {
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continue;
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}
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auto ct = get_type (n[i]);
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if (is_algebra (ct)) {
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n[i] = cast_expr (float_type (ct), n[i]);
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}
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n[i] = unary_expr ('-', n[i]);
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n[i]->e.expr.type = ct;
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}
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notice (e, "not implemented");
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return 0;
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return mvec_gather (n, algebra);
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}
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expr_t *
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@ -1711,7 +1711,8 @@ expr_negate (sblock_t *sblock, expr_t *e, operand_t **op)
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zero->file = e->file;
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zero->line = e->line;
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convert_nil (zero, e->e.expr.type);
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neg = binary_expr ('-', zero, e->e.expr.e1);
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neg = new_binary_expr ('-', zero, e->e.expr.e1);
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neg->e.expr.type = e->e.expr.type;
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neg->file = e->file;
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neg->line = e->line;
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return statement_subexpr (sblock, neg, op);
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@ -241,5 +241,16 @@ main (void)
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s.scalar, s.bvec);
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return 1;
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}
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e.mvec = -e.mvec; // odd
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if ((dvec3)e.vec != '-2 -3 -0.5'd || (scalar_t)e.tvec != 10) {
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printf ("odd† != '-2 -3 -0.5' + 10: %lv %g\n", e.vec, e.tvec);
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return 1;
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}
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s.mvec = -s.mvec; // even
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if (s.scalar != 4.5 || (dvec3)s.bvec != '7 22 23'd) {
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printf ("even† != 4.5, '7 22 23': %g %lv\n",
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s.scalar, s.bvec);
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return 1;
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}
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return 0; // to survive and prevail :)
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}
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