> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/9.0/user-guide/disassembler/disassembly-gallery/philips-51xa-g3.md).

# Philips 51XA-G3

```armasm
seg000:02E4
seg000:02E4 ; =============== S U B R O U T I N E =======================================
seg000:02E4
seg000:02E4
seg000:02E4 sub_2E4:                                ; CODE XREF: seg000:0316↓p
seg000:02E4                                         ; seg000:0344↓p
seg000:02E4                 cmp.b   R1H, #0
seg000:02E7                 bge     loc_2F6
seg000:02E9                 movs.w  R4, #0
seg000:02EB                 sub.w   R4, R0
seg000:02ED                 mov.w   R0, R4
seg000:02EF                 movs.w  R4, #0
seg000:02F1                 subb.w  R4, R1
seg000:02F3                 mov.w   R1, R4
seg000:02F5                 nop
seg000:02F6
seg000:02F6 loc_2F6:                                ; CODE XREF: sub_2E4+3↑j
seg000:02F6                 cmp.b   R3H, #0
seg000:02F9                 bge     locret_308
seg000:02FB                 movs.w  R4, #0
seg000:02FD                 sub.w   R4, R2
seg000:02FF                 mov.w   R2, R4
seg000:0301                 movs.w  R4, #0
seg000:0303                 subb.w  R4, R3
seg000:0305                 mov.w   R3, R4
seg000:0307                 nop
seg000:0308
seg000:0308 locret_308:                             ; CODE XREF: sub_2E4+15↑j
seg000:0308                 ret
seg000:0308 ; End of function sub_2E4
seg000:0308
seg000:030A ; ---------------------------------------------------------------------------
seg000:030A                 push.w  R4
seg000:030C                 push.w  R5
seg000:030E                 push.w  R6
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.hex-rays.com/9.0/user-guide/disassembler/disassembly-gallery/philips-51xa-g3.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.