sh: Bring the SH-5 FPU in line with the SH-4 FPU API.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 44 insertions, 0 deletions

diff --git a/include/asm-sh/fpu.h b/include/asm-sh/fpu.h
new file mode 100644
index 00000000000..33db698a6b4
--- /dev/null
+++ b/include/asm-sh/fpu.h
@@ -0,0 +1,44 @@
+#ifndef __ASM_SH_FPU_H
+#define __ASM_SH_FPU_H
+
+#define SR_FD    0x00008000
+
+#ifndef __ASSEMBLY__
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_SH_FPU
+static inline void release_fpu(struct pt_regs *regs)
+{
+        regs->sr |= SR_FD;
+}
+
+static inline void grab_fpu(struct pt_regs *regs)
+{
+        regs->sr &= ~SR_FD;
+}
+
+struct task_struct;
+
+extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
+#else
+#define release_fpu(regs)       do { } while (0)
+#define grab_fpu(regs)          do { } while (0)
+#define save_fpu(tsk, regs)     do { } while (0)
+#endif
+
+#define unlazy_fpu(tsk, regs) do {                      \
+        if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {   \
+                save_fpu(tsk, regs);                    \
+        }                                               \
+} while (0)
+
+#define clear_fpu(tsk, regs) do {                               \
+        if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) {           \
+                clear_tsk_thread_flag(tsk, TIF_USEDFPU);        \
+                release_fpu(regs);                              \
+        }                                                       \
+} while (0)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_SH_FPU_H */