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glsl: Add ir_triop_vector_insert

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The new opcode is used to generate a new vector with a single field from
the source vector replaced.  This will eventually replace
ir_dereference_array of vectors in the LHS of assignments.

v2: Convert tabs to spaces.  Suggested by Eric.

v3: Add constant expression handling for ir_triop_vector_insert.  This
prevents the constant matrix inversion tests from regressing.  Duh.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Ian Romanick
2013-03-12 12:42:51 -07:00
parent f274a2ca87
commit dafd6918f3
5 changed files with 46 additions and 1 deletions
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src/glsl/ir_constant_expression.cpp
+25
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@@ -1388,6 +1388,31 @@ ir_expression::constant_expression_value(struct hash_table *variable_context)
break;
}
case ir_triop_vector_insert: {
const unsigned idx = op[2]->value.u[0];
memcpy(&data, &op[0]->value, sizeof(data));
switch (this->type->base_type) {
case GLSL_TYPE_INT:
data.i[idx] = op[1]->value.i[0];
break;
case GLSL_TYPE_UINT:
data.u[idx] = op[1]->value.u[0];
break;
case GLSL_TYPE_FLOAT:
data.f[idx] = op[1]->value.f[0];
break;
case GLSL_TYPE_BOOL:
data.b[idx] = op[1]->value.b[0];
break;
default:
assert(!"Should not get here.");
break;
}
break;
}
case ir_quadop_bitfield_insert: {
int offset = op[2]->value.i[0];
int bits = op[3]->value.i[0];