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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arc/include/asm/fpu.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arc/include/asm/fpu.h')
-rw-r--r--arch/arc/include/asm/fpu.h57
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/arc/include/asm/fpu.h b/arch/arc/include/asm/fpu.h
new file mode 100644
index 0000000000..006bcf88a7
--- /dev/null
+++ b/arch/arc/include/asm/fpu.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ *
+ */
+
+#ifndef _ASM_ARC_FPU_H
+#define _ASM_ARC_FPU_H
+
+#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
+
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_ISA_ARCOMPACT
+
+/* These DPFP regs need to be saved/restored across ctx-sw */
+struct arc_fpu {
+ struct {
+ unsigned int l, h;
+ } aux_dpfp[2];
+};
+
+#define fpu_init_task(regs)
+
+#else
+
+/*
+ * ARCv2 FPU Control aux register
+ * - bits to enable Traps on Exceptions
+ * - Rounding mode
+ *
+ * ARCv2 FPU Status aux register
+ * - FPU exceptions flags (Inv, Div-by-Zero, overflow, underflow, inexact)
+ * - Flag Write Enable to clear flags explicitly (vs. by fpu instructions
+ * only
+ */
+
+struct arc_fpu {
+ unsigned int ctrl, status;
+};
+
+extern void fpu_init_task(struct pt_regs *regs);
+
+#endif /* !CONFIG_ISA_ARCOMPACT */
+
+struct task_struct;
+
+extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
+
+#else /* !CONFIG_ARC_FPU_SAVE_RESTORE */
+
+#define fpu_save_restore(p, n)
+#define fpu_init_task(regs)
+
+#endif /* CONFIG_ARC_FPU_SAVE_RESTORE */
+
+#endif /* _ASM_ARC_FPU_H */