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ir_swizzle: Add new constructor, refactor constructors

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Adds a new constructor that takes an array of component values.  Refactors
the meat of the two constructors to an init_mask method.
This commit is contained in:
Ian Romanick
2010-06-25 15:25:27 -07:00
parent 50577b96ac
commit 6315b68f5f
2 changed files with 55 additions and 17 deletions
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61
src/glsl/ir.cpp
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@@ -573,28 +573,40 @@ ir_texture::set_sampler(ir_dereference *sampler)
}
ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
unsigned w, unsigned count)
: val(val)
void
ir_swizzle::init_mask(const unsigned *comp, unsigned count)
{
assert((count >= 1) && (count <= 4));
const unsigned dup_mask = 0
| ((count > 1) ? ((1U << y) & ((1U << x) )) : 0)
| ((count > 2) ? ((1U << z) & ((1U << x) | (1U << y) )) : 0)
| ((count > 3) ? ((1U << w) & ((1U << x) | (1U << y) | (1U << z))) : 0);
memset(&this->mask, 0, sizeof(this->mask));
this->mask.num_components = count;
assert(x <= 3);
assert(y <= 3);
assert(z <= 3);
assert(w <= 3);
unsigned dup_mask = 0;
switch (count) {
case 4:
assert(comp[3] <= 3);
dup_mask |= (1U << comp[3])
& ((1U << comp[0]) | (1U << comp[1]) | (1U << comp[2]));
this->mask.w = comp[3];
mask.x = x;
mask.y = y;
mask.z = z;
mask.w = w;
mask.num_components = count;
mask.has_duplicates = dup_mask != 0;
case 3:
assert(comp[2] <= 3);
dup_mask |= (1U << comp[2])
& ((1U << comp[0]) | (1U << comp[1]));
this->mask.z = comp[2];
case 2:
assert(comp[1] <= 3);
dup_mask |= (1U << comp[1])
& ((1U << comp[0]));
this->mask.y = comp[1];
case 1:
assert(comp[0] <= 3);
this->mask.x = comp[0];
}
this->mask.has_duplicates = dup_mask != 0;
/* Based on the number of elements in the swizzle and the base type
* (i.e., float, int, unsigned, or bool) of the vector being swizzled,
@@ -603,6 +615,21 @@ ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
type = glsl_type::get_instance(val->type->base_type, mask.num_components, 1);
}
ir_swizzle::ir_swizzle(ir_rvalue *val, unsigned x, unsigned y, unsigned z,
unsigned w, unsigned count)
: val(val)
{
const unsigned components[4] = { x, y, z, w };
this->init_mask(components, count);
}
ir_swizzle::ir_swizzle(ir_rvalue *val, const unsigned *comp,
unsigned count)
: val(val)
{
this->init_mask(comp, count);
}
ir_swizzle::ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
{
this->val = val;