nir: Add fisfinite op

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6355>
diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index d880c51..bd8e0cd 100644
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -1156,3 +1156,4 @@
       "(((uint32_t)src0 << 8) >> 8) * (((uint32_t)src1 << 8) >> 8)")
 
 unop_convert("fisnormal", tbool1, tfloat, "isnormal(src0)")
+unop_convert("fisfinite", tbool1, tfloat, "isfinite(src0)")