Unnamed repository; edit this file 'description' to name the repository. http://cgit.235523.xyz/opensbi.git/atom/include/sbi/sbi_fp.h?h=master 2026-05-18T08:32:28Z 2026-05-18T08:32:28Z Dave Patel dave.patel@riscstar.com 2026-05-18T08:30:22Z urn:sha1:718e1d194f5a41c657dfe094392abdeb02356680 Add support for saving and restoring RISC-V floating-point (F/D) extension state in OpenSBI. This introduces a floating-point context structure and helper routines to perform full context save and restore. The floating-point context includes storage for all 32 FPi registers (f0–f31) along with the fcsr control and status register. The register state is saved and restored using double-precision load/store instructions (fsd/fld), and single-precision load/store instructions (fsw/flw) on an RV64 system with F and D-extension support. The implementation follows an eager context switching model where the entire FP state is saved and restored on every context switch. This avoids the need for trap-based lazy management and keeps the design simple and deterministic. Signed-off-by: Dave Patel <dave.patel@riscstar.com> Signed-off-by: Anup Patel <anup.patel@oss.qualcomm.com> Link: https://lore.kernel.org/r/20260518083023.997323-3-anup.patel@oss.qualcomm.com Signed-off-by: Anup Patel <anup@brainfault.org>