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constant-fold the 1/N division from a_vector/N

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This commit is contained in:
Wolfgang Bumiller 2013-01-13 20:53:07 +01:00
parent a5029a510a
commit ab8cc64dfd
1 changed files with 17 additions and 7 deletions
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24
parser.c
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@ -937,9 +937,13 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
if (CanConstFold(exprs[0], exprs[1]))
out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), 1.0/ConstF(1)));
else {
out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
(ast_expression*)parser_const_float_1(parser),
exprs[1]);
if (CanConstFold1(exprs[1])) {
out = (ast_expression*)parser_const_float(parser, 1.0 / ConstF(1));
} else {
out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
(ast_expression*)parser_const_float_1(parser),
exprs[1]);
}
if (!out) {
compile_error(ctx, "internal error: failed to generate division");
return false;
@ -1288,11 +1292,17 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
exprs[0], exprs[1]);
} else {
/* there's no DIV_VF */
out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
(ast_expression*)parser_const_float_1(parser),
exprs[1]);
if (!out)
if (CanConstFold1(exprs[1])) {
out = (ast_expression*)parser_const_float(parser, 1.0 / ConstF(1));
} else {
out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
(ast_expression*)parser_const_float_1(parser),
exprs[1]);
}
if (!out) {
compile_error(ctx, "internal error: failed to generate division");
return false;
}
out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
exprs[0], out);
}