From 1469c5304899126b8822ec24c4550922eb021eee Mon Sep 17 00:00:00 2001
From: nmzik <Nmzik@mail.ru>
Date: Sun, 30 Aug 2026 23:39:18 +0400
Subject: [PATCH] fix(agc): honor top bound for single-ended buffers

---
 src/libs/agc.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/libs/agc.cpp b/src/libs/agc.cpp
index 3b065303f..9766c73af 100644
--- a/src/libs/agc.cpp
+++ b/src/libs/agc.cpp
@@ -257,11 +257,12 @@ struct CommandBuffer {
 	}
 
 	[[nodiscard]] KYTY_SYSV_ABI uint32_t GetAvailableSizeDW() const {
-		if (cursor_up == nullptr || cursor_down == nullptr || cursor_down <= cursor_up) {
+		auto* end = cursor_down != nullptr ? cursor_down : top;
+		if (cursor_up == nullptr || end == nullptr || end <= cursor_up) {
 			return 0;
 		}
 
-		auto available = static_cast<uint64_t>(cursor_down - cursor_up);
+		auto available = static_cast<uint64_t>(end - cursor_up);
 		if (available <= reserved_dw) {
 			return 0;
 		}