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Support vector/quaternion division by float

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Implemented via v*(1/f) or q*(1/f) to give CSE a chance to optimize the
division if necessary as otherwise the engine would have to divide every
time.
This commit is contained in:
Bill Currie 2019-06-10 08:44:36 +09:00
parent 7dc1a0640a
commit 83fb588727
1 changed files with 12 additions and 2 deletions
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14
tools/qfcc/source/expr_binary.c
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@ -46,6 +46,7 @@ typedef struct {
} expr_type_t;
static expr_t *pointer_arithmetic (int op, expr_t *e1, expr_t *e2);
static expr_t *inverse_multiply (int op, expr_t *e1, expr_t *e2);
static expr_type_t string_string[] = {
{'+', &type_string},
@ -85,7 +86,7 @@ static expr_type_t float_vector[] = {
static expr_type_t float_quat[] = {
{'*', &type_quaternion},
{'/', &type_quaternion},
{'/', 0, 0, 0, inverse_multiply},
{0, 0}
};
@ -113,7 +114,7 @@ static expr_type_t float_integer[] = {
static expr_type_t vector_float[] = {
{'*', &type_vector},
{'/', &type_vector},
{'/', 0, 0, 0, inverse_multiply},
{0, 0}
};
@ -601,6 +602,15 @@ pointer_arithmetic (int op, expr_t *e1, expr_t *e2)
return cast_expr (ptype, e);
}
static expr_t *
inverse_multiply (int op, expr_t *e1, expr_t *e2)
{
// There is no vector/float or quaternion/float instruction and adding
// one would mean the engine would have to do 1/f every time
expr_t *one = new_float_expr (1);
return binary_expr ('*', e1, binary_expr ('/', one, e2));
}
static expr_t *
invalid_binary_expr (int op, expr_t *e1, expr_t *e2)
{