nir: Add support for 1-bit data types

This commit adds support for 1-bit Booleans and integers.  Booleans
obviously take a value of true or false.  Because we have to define the
semantics of 1-bit signed and unsigned integers, we define uint1_t to
take values of 0 and 1 and int1_t to take values of 0 and -1.  1-bit
arithmetic is then well-defined in the usual way, just with fewer bits.
The definition of int1_t and uint1_t doesn't usually matter but we do
need something for purposes of constant folding.

Reviewed-by: Eric Anholt <[email protected]>
Reviewed-by: Bas Nieuwenhuizen <[email protected]>
Tested-by: Bas Nieuwenhuizen <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/compiler/nir/nir_validate.c b/src/compiler/nir/nir_validate.c
index 62893cad87e..c896b9a8037 100644
--- a/src/compiler/nir/nir_validate.c
+++ b/src/compiler/nir/nir_validate.c
@@ -818,7 +818,7 @@ validate_if(nir_if *if_stmt, validate_state *state)
    nir_cf_node *next_node = nir_cf_node_next(&if_stmt->cf_node);
    validate_assert(state, next_node->type == nir_cf_node_block);
 
-   validate_src(&if_stmt->condition, state, 32, 1);
+   validate_src(&if_stmt->condition, state, 0, 1);
 
    validate_assert(state, !exec_list_is_empty(&if_stmt->then_list));
    validate_assert(state, !exec_list_is_empty(&if_stmt->else_list));