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unary - operator implemented, adding imm_vector_zero and imm_float_zero since those should be accessible quickly

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Wolfgang (Blub) Bumiller 2012-08-16 14:23:18 +02:00
parent 8dfba4db6d
commit c4730b405b
1 changed files with 56 additions and 3 deletions
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57
parser.c
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@ -20,6 +20,9 @@ typedef struct {
MEM_VECTOR_MAKE(ast_value*, imm_string);
MEM_VECTOR_MAKE(ast_value*, imm_vector);
ast_value *imm_float_zero;
ast_value *imm_vector_zero;
ast_function *function;
MEM_VECTOR_MAKE(varentry_t, locals);
size_t blocklocal;
@ -161,6 +164,13 @@ ast_value* parser_const_float(parser_t *parser, double d)
return out;
}
ast_value* parser_const_float_0(parser_t *parser)
{
if (!parser->imm_float_zero)
parser->imm_float_zero = parser_const_float(parser, 0);
return parser->imm_float_zero;
}
ast_value* parser_const_string(parser_t *parser, const char *str)
{
size_t i;
@ -197,6 +207,22 @@ ast_value* parser_const_vector(parser_t *parser, vector v)
return out;
}
ast_value* parser_const_vector_f(parser_t *parser, float x, float y, float z)
{
vector v;
v.x = x;
v.y = y;
v.z = z;
return parser_const_vector(parser, v);
}
ast_value* parser_const_vector_0(parser_t *parser)
{
if (!parser->imm_vector_zero)
parser->imm_vector_zero = parser_const_vector_f(parser, 0, 0, 0);
return parser->imm_vector_zero;
}
ast_expression* parser_find_field(parser_t *parser, const char *name)
{
size_t i;
@ -432,9 +458,10 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
#define NotSameType(T) \
(exprs[0]->expression.vtype != exprs[1]->expression.vtype || \
exprs[0]->expression.vtype != T)
#define CanConstFold1(A) \
(ast_istype((A), ast_value) && ((ast_value*)(A))->isconst)
#define CanConstFold(A, B) \
(ast_istype((A), ast_value) && ast_istype((B), ast_value) && \
((ast_value*)(A))->isconst && ((ast_value*)(B))->isconst)
(CanConstFold1(A) && CanConstFold1(B))
#define ConstV(i) (asvalue[(i)]->constval.vvec)
#define ConstF(i) (asvalue[(i)]->constval.vfloat)
switch (op->id)
@ -479,6 +506,32 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
sy->out[sy->out_count++] = syblock(ctx, blocks[0]);
return true;
case opid2('-','P'):
switch (exprs[0]->expression.vtype) {
case TYPE_FLOAT:
if (CanConstFold1(exprs[0]))
out = (ast_expression*)parser_const_float(parser, -ConstF(0));
else
out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F,
(ast_expression*)parser_const_float_0(parser),
exprs[0]);
break;
case TYPE_VECTOR:
if (CanConstFold1(exprs[0]))
out = (ast_expression*)parser_const_vector_f(parser,
-ConstV(0).x, -ConstV(0).y, -ConstV(0).z);
else
out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V,
(ast_expression*)parser_const_vector_0(parser),
exprs[0]);
break;
default:
parseerror(parser, "invalid types used in expression: cannot negate type %s",
type_name[exprs[0]->expression.vtype]);
return false;
}
break;
case opid1('+'):
if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
(exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )