arch/sh/include/cpu-sh4/cpu/fpu.h

File Facts

System

Linux kernel

Corpus path

arch/sh/include/cpu-sh4/cpu/fpu.h

Extension

.h

Size

708 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/sh

Inferred role

Architecture Layer: implementation source

Status

source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __CPU_SH4_FPU_H
#define __CPU_SH4_FPU_H

#define FPSCR_ENABLE_MASK	0x00000f80UL

#define FPSCR_FMOV_DOUBLE	(1<<1)

#define FPSCR_CAUSE_INEXACT	(1<<12)
#define FPSCR_CAUSE_UNDERFLOW	(1<<13)
#define FPSCR_CAUSE_OVERFLOW	(1<<14)
#define FPSCR_CAUSE_DIVZERO	(1<<15)
#define FPSCR_CAUSE_INVALID	(1<<16)
#define FPSCR_CAUSE_ERROR 	(1<<17)

#define FPSCR_DBL_PRECISION	(1<<19)
#define FPSCR_ROUNDING_MODE(x)	((x >> 20) & 3)
#define FPSCR_RM_NEAREST	(0)
#define FPSCR_RM_ZERO		(1)

#endif

Annotation

• Atlas domain: Architecture Layer / arch/sh.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.