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spirv: Use the right bit-size for spec constant ops

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Previously, we would always pull the bit size from the destination which
is wrong for opcodes like nir_ilt where the sources are variable-sized
but the destination is a fixed size.  We were getting lucky before
because nir_op_ilt returns a 32-bit value and basically everyone who
uses spec constants uses 32-bit ones.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Jason Ekstrand 2018-10-19 19:08:58 -05:00
parent 1d2ed694c1
commit 8fa70cfcfd
1 changed files with 9 additions and 3 deletions
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12
src/compiler/spirv/spirv_to_nir.c
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@ -1798,11 +1798,17 @@ vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
nir_const_value src[4];
for (unsigned i = 0; i < count - 4; i++) {
nir_constant *c =
vtn_value(b, w[4 + i], vtn_value_type_constant)->constant;
struct vtn_value *src_val =
vtn_value(b, w[4 + i], vtn_value_type_constant);
/* If this is an unsized source, pull the bit size from the
* source; otherwise, we'll use the bit size from the destination.
*/
if (!nir_alu_type_get_type_size(nir_op_infos[op].input_types[i]))
bit_size = glsl_get_bit_size(src_val->type->type);
unsigned j = swap ? 1 - i : i;
src[j] = c->values[0];
src[j] = src_val->constant->values[0];
}
val->constant->values[0] =