nir: Add a saturated unsigned integer add opcode

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index ac2bb9cf7116c7b5d2d63d34f70581dd3a81c619..5458ddd8198a20887465092aa52fb5650b1b87d5 100644 (file)
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -462,6 +462,8 @@ def binop_reduce(name, output_size, output_type, src_type, prereduce_expr,
 
 binop("fadd", tfloat, commutative + associative, "src0 + src1")
 binop("iadd", tint, commutative + associative, "src0 + src1")
+binop("uadd_sat", tuint, commutative,
+      "(src0 + src1) < src0 ? UINT64_MAX : (src0 + src1)")
 binop("fsub", tfloat, "", "src0 - src1")
 binop("isub", tint, "", "src0 - src1")