Upload anina_fp16_patch.py

scripts/anina_fp16_patch.py

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+# A very basic ComfyUI plugin to patch anima, which is based cosmos pt2,
+# to use fp16 "safely" on old GPUs.
+# Only tested for anima.
+# Written by reakaakasky (https://civitai.com/user/reakaakasky).
+
+# To clarify, this plugin isn't uploaded to GitHub because it's a very "dirty" plugin.
+# "dirty" means it hot-patches/monkey patches the comfyui core code.
+# This approach is terrible from a programming perspective.
+# But this is the simplest approach I can think of.
+
+# How to use:
+# Put this file in the ComfyUI "custom_nodes" dir.
+# Use "ModelComputeDtype" node and set dtype to "fp16".
+# To disable the patch, remove the file, or rename the ".py" suffix, to something
+# like ".disable", whatever.
+
+# Version: v1 (2/2/2026)
+# Version: v1.1 (2/2/2026) optimazed for torch.compile
+
+import torch
+import logging
+
+
+logger = logging.getLogger(__name__)
+logger.info("[anima fp16 patch] patch loading")
+
+NODE_CLASS_MAPPINGS = {}
+
+NODE_DISPLAY_NAME_MAPPINGS = {}
+
+import comfy.ldm.cosmos.predict2 as p2
+
+ampf16 = torch.autocast("cuda", dtype=torch.float16)
+ampf32 = torch.autocast("cuda", dtype=torch.float32)
+
+
+def p2_Block_init_patch(self: p2.Block, *args, **kwargs):
+    self.__init_org(*args, **kwargs)
+
+    self.adaln_modulation_self_attn.forward = ampf16(self.adaln_modulation_self_attn.forward)
+    self.adaln_modulation_cross_attn.forward = ampf16(self.adaln_modulation_cross_attn.forward)
+
+    self.self_attn.forward = ampf16(self.self_attn.forward)
+    self.cross_attn.forward = ampf16(self.cross_attn.forward)
+    self.mlp.forward = ampf16(self.mlp.forward)
+
+    self.forward = ampf32(self.forward)
+
+
+p2.Block.__init_org = p2.Block.__init__
+p2.Block.__init__ = p2_Block_init_patch
+
+torch.set_float32_matmul_precision("high")
+torch.backends.cuda.matmul.allow_fp16_accumulation = True
+
+logger.info("[anima fp16 patch] patch loaded")