pan/bi: Implement saturated add/sub operations

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8358>

diff --git a/src/panfrost/bifrost/bifrost_compile.c b/src/panfrost/bifrost/bifrost_compile.c
index dc9b6f9..3219d0e 100644 (file)
--- a/src/panfrost/bifrost/bifrost_compile.c
+++ b/src/panfrost/bifrost/bifrost_compile.c
@@ -1256,10 +1256,18 @@ bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
                 bi_iadd_to(b, sz, dst, s0, s1, false);
                 break;
 
+        case nir_op_iadd_sat:
+                bi_iadd_to(b, sz, dst, s0, s1, true);
+                break;
+
         case nir_op_isub:
                 bi_isub_to(b, sz, dst, s0, s1, false);
                 break;
 
+        case nir_op_isub_sat:
+                bi_isub_to(b, sz, dst, s0, s1, true);
+                break;
+
         case nir_op_imul:
                 bi_imul_to(b, sz, dst, s0, s1);
                 break;