x86: x86 i387 cleanup

This removes all the old code that is no longer used after
the i387 unification and cleanup.  The i387_64.h is renamed
to i387.h with no changes, but since it replaces the nonempty
one-line stub i387.h it looks like a big diff and not a rename.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 181 deletions

diff --git a/arch/x86/ia32/fpu32.c b/arch/x86/ia32/fpu32.c
deleted file mode 100644
index ae80745f668..00000000000
--- a/arch/x86/ia32/fpu32.c
+++ /dev/null
@@ -1,181 +0,0 @@
-/*
- * Copyright 2002 Andi Kleen, SuSE Labs.
- * FXSAVE<->i387 conversion support. Based on code by Gareth Hughes.
- * This is used for ptrace, signals and coredumps in 32bit emulation.
- */
-
-#include <linux/sched.h>
-#include <asm/sigcontext32.h>
-#include <asm/processor.h>
-#include <asm/uaccess.h>
-#include <asm/i387.h>
-
-static inline unsigned short twd_i387_to_fxsr(unsigned short twd)
-{
-	unsigned int tmp; /* to avoid 16 bit prefixes in the code */
-
-	/* Transform each pair of bits into 01 (valid) or 00 (empty) */
-	tmp = ~twd;
-	tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
-	/* and move the valid bits to the lower byte. */
-	tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
-	tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
-	tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
-	return tmp;
-}
-
-#define FPREG_ADDR(f, n)	((void *)&(f)->st_space + (n) * 16);
-#define FP_EXP_TAG_VALID	0
-#define FP_EXP_TAG_ZERO		1
-#define FP_EXP_TAG_SPECIAL	2
-#define FP_EXP_TAG_EMPTY	3
-
-static inline unsigned long twd_fxsr_to_i387(struct i387_fxsave_struct *fxsave)
-{
-	struct _fpxreg *st;
-	unsigned long tos = (fxsave->swd >> 11) & 7;
-	unsigned long twd = (unsigned long) fxsave->twd;
-	unsigned long tag;
-	unsigned long ret = 0xffff0000;
-	int i;
-
-	for (i = 0; i < 8; i++, twd >>= 1) {
-		if (twd & 0x1) {
-			st = FPREG_ADDR(fxsave, (i - tos) & 7);
-
-			switch (st->exponent & 0x7fff) {
-			case 0x7fff:
-				tag = FP_EXP_TAG_SPECIAL;
-				break;
-			case 0x0000:
-				if (!st->significand[0] &&
-				    !st->significand[1] &&
-				    !st->significand[2] &&
-				    !st->significand[3])
-					tag = FP_EXP_TAG_ZERO;
-				else
-					tag = FP_EXP_TAG_SPECIAL;
-				break;
-			default:
-				if (st->significand[3] & 0x8000)
-					tag = FP_EXP_TAG_VALID;
-				else
-					tag = FP_EXP_TAG_SPECIAL;
-				break;
-			}
-		} else {
-			tag = FP_EXP_TAG_EMPTY;
-		}
-		ret |= tag << (2 * i);
-	}
-	return ret;
-}
-
-#define G(num, val) err |= __get_user(val, num + (u32 __user *)buf)
-
-static inline int convert_fxsr_from_user(struct i387_fxsave_struct *fxsave,
-					 struct _fpstate_ia32 __user *buf)
-{
-	struct _fpxreg *to;
-	struct _fpreg __user *from;
-	int i, err = 0;
-	u32 v;
-
-	G(0, fxsave->cwd);
-	G(1, fxsave->swd);
-	G(2, fxsave->twd);
-	fxsave->twd = twd_i387_to_fxsr(fxsave->twd);
-	G(3, fxsave->rip);
-	G(4, v);
-	/* cs ignored */
-	fxsave->fop = v>>16;
-	G(5, fxsave->rdp);
-	/* 6: ds ignored */
-	if (err)
-		return -1;
-
-	to = (struct _fpxreg *)&fxsave->st_space[0];
-	from = &buf->_st[0];
-	for (i = 0; i < 8; i++, to++, from++) {
-		if (__copy_from_user(to, from, sizeof(*from)))
-			return -1;
-	}
-	return 0;
-}
-
-#define P(num, val) err |= __put_user(val, num + (u32 __user *)buf)
-
-static inline int convert_fxsr_to_user(struct _fpstate_ia32 __user *buf,
-				       struct i387_fxsave_struct *fxsave,
-				       struct pt_regs *regs,
-				       struct task_struct *tsk)
-{
-	struct _fpreg __user *to;
-	struct _fpxreg *from;
-	int i, err = 0;
-	u16 cs, ds;
-
-	if (tsk == current) {
-		/*
-		 * should be actually ds/cs at fpu exception time, but
-		 * that information is not available in 64bit mode.
-		 */
-		asm("movw %%ds,%0 " : "=r" (ds));
-		asm("movw %%cs,%0 " : "=r" (cs));
-	} else {
-		 /* ptrace. task has stopped. */
-		ds = tsk->thread.ds;
-		cs = regs->cs;
-	}
-
-	P(0, (u32)fxsave->cwd | 0xffff0000);
-	P(1, (u32)fxsave->swd | 0xffff0000);
-	P(2, twd_fxsr_to_i387(fxsave));
-	P(3, (u32)fxsave->rip);
-	P(4,  cs | ((u32)fxsave->fop) << 16);
-	P(5, fxsave->rdp);
-	P(6, 0xffff0000 | ds);
-
-	if (err)
-		return -1;
-
-	to = &buf->_st[0];
-	from = (struct _fpxreg *) &fxsave->st_space[0];
-	for (i = 0; i < 8; i++, to++, from++) {
-		if (__copy_to_user(to, from, sizeof(*to)))
-			return -1;
-	}
-	return 0;
-}
-
-int restore_i387_ia32(struct task_struct *tsk,
-		      struct _fpstate_ia32 __user *buf, int fsave)
-{
-	clear_fpu(tsk);
-	if (!fsave) {
-		if (__copy_from_user(&tsk->thread.i387.fxsave,
-				     &buf->_fxsr_env[0],
-				     sizeof(struct i387_fxsave_struct)))
-			return -1;
-		tsk->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
-		set_stopped_child_used_math(tsk);
-	}
-	return convert_fxsr_from_user(&tsk->thread.i387.fxsave, buf);
-}
-
-int save_i387_ia32(struct task_struct *tsk, struct _fpstate_ia32 __user *buf,
-		   struct pt_regs *regs, int fsave)
-{
-	int err = 0;
-
-	init_fpu(tsk);
-	if (convert_fxsr_to_user(buf, &tsk->thread.i387.fxsave, regs, tsk))
-		return -1;
-	if (fsave)
-		return 0;
-	err |= __put_user(tsk->thread.i387.fxsave.swd, &buf->status);
-	err |= __put_user(X86_FXSR_MAGIC, &buf->magic);
-	err |= __copy_to_user(&buf->_fxsr_env[0], &tsk->thread.i387.fxsave,
-			      sizeof(struct i387_fxsave_struct));
-	return err ? -1 : 1;
-}