From 3039b090f2058949edf6a7f1c8e793bc309fa6de Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 15 Sep 2023 15:37:00 +0100 Subject: target/arm: Implement FEAT_HBC MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit FEAT_HBC (Hinted conditional branches) provides a new instruction BC.cond, which behaves exactly like the existing B.cond except that it provides a hint to the branch predictor about the likely behaviour of the branch. Since QEMU does not implement branch prediction, we can treat this identically to B.cond. Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson --- docs/system/arm/emulation.rst | 1 + 1 file changed, 1 insertion(+) (limited to 'docs/system') diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst index 3df936fc35..1fb6a2e8c3 100644 --- a/docs/system/arm/emulation.rst +++ b/docs/system/arm/emulation.rst @@ -42,6 +42,7 @@ the following architecture extensions: - FEAT_FlagM2 (Enhancements to flag manipulation instructions) - FEAT_GTG (Guest translation granule size) - FEAT_HAFDBS (Hardware management of the access flag and dirty bit state) +- FEAT_HBC (Hinted conditional branches) - FEAT_HCX (Support for the HCRX_EL2 register) - FEAT_HPDS (Hierarchical permission disables) - FEAT_HPDS2 (Translation table page-based hardware attributes) -- cgit 1.4.1