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SpecOp bool->uint/int and uint<->int conversion

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Bool -> uint/int with OpSpecConstantOp OpSelect instruction.

uint <-> int conversion with OpSpecConstantOp OpIAdd instruction.

Note, implicit conversion: `const uint = an_int_spec_constant` is not
supported. Explicit type casting is required: `const uint =
uint(an_int_spec_constant)`
This commit is contained in:
qining 2016-04-07 15:40:27 -04:00
parent d99524197f
commit e24aa5edbb
4 changed files with 188 additions and 103 deletions
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27
Test/spv.specConstantOperations.vert
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@ -10,9 +10,15 @@ layout(constant_id = 203) const int sp_sint = -10;
// Scalars
//
// Size convert
//const double float_to_double = double(sp_float);
//const float double_to_float = float(float_to_double);
// uint/int <-> bool conversion
const bool bool_from_int = bool(sp_int);
const bool bool_from_uint = bool(sp_uint);
const int int_from_bool = int(bool_from_int);
const uint uint_from_bool = uint(bool_from_int);
// uint <-> int
const uint sp_uint_from_sint = uint(sp_sint);
const int sp_sint_from_uint = int(sp_uint);
// Negate and Not
const int negate_int = -sp_int;
@ -54,9 +60,15 @@ const ivec4 iv = ivec4(20, 30, sp_int, sp_int);
const uvec4 uv = uvec4(sp_uint, sp_uint, -1, -2);
const vec4 fv = vec4(sp_float, 1.25, sp_float, 1.25);
// Size convert
//const dvec4 fv_to_dv = dvec4(fv);
//const vec4 dv_to_fv = vec4(fv_to_dv);
// uint/int <-> bool conversion
const bvec4 bv_from_iv = bvec4(iv);
const bvec4 bv_from_uv = bvec4(uv);
const ivec4 iv_from_bv = ivec4(bv_from_iv);
const uvec4 uv_from_bv = uvec4(bv_from_iv);
// uint <-> int
const uvec4 uv_from_iv = uvec4(iv);
const ivec4 iv_from_uv = ivec4(uv);
// Negate and Not
const ivec4 not_iv = ~iv;
@ -88,6 +100,9 @@ const ivec4 iv_yzxw = iv.yzxw;
int non_const_array_size_from_spec_const() {
int array[sp_int + 2];
for (int i = 0; i < sp_int + 2; i++) {
array[i] = 1023;
}
return array[sp_int + 1];
}