arch/powerpc/math-emu/fctiw.c

Source file repositories/reference/linux-study-clean/arch/powerpc/math-emu/fctiw.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/math-emu/fctiw.c
Extension
.c
Size
463 bytes
Lines
29
Domain
Architecture Layer
Bucket
arch/powerpc
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/uaccess.h>

#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>
#include <math-emu/double.h>

int
fctiw(u32 *frD, void *frB)
{
	FP_DECL_D(B);
	FP_DECL_EX;
	unsigned int r;

	FP_UNPACK_DP(B, frB);
	FP_TO_INT_D(r, B, 32, 1);
	frD[1] = r;

#ifdef DEBUG
	printk("%s: D %p, B %p: ", __func__, frD, frB);
	dump_double(frD);
	printk("\n");
#endif

	return 0;
}

Annotation

Implementation Notes