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-rw-r--r--arch/x86/ia32/fpu32.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/arch/x86/ia32/fpu32.c b/arch/x86/ia32/fpu32.c
deleted file mode 100644
index 2c8209a3605..00000000000
--- a/arch/x86/ia32/fpu32.c
+++ /dev/null
@@ -1,183 +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;
-}
-
-static inline unsigned long twd_fxsr_to_i387(struct i387_fxsave_struct *fxsave)
-{
- struct _fpxreg *st = NULL;
- unsigned long tos = (fxsave->swd >> 11) & 7;
- unsigned long twd = (unsigned long) fxsave->twd;
- unsigned long tag;
- unsigned long ret = 0xffff0000;
- int i;
-
-#define FPREG_ADDR(f, n) ((void *)&(f)->st_space + (n) * 16);
-
- for (i = 0 ; i < 8 ; i++) {
- if (twd & 0x1) {
- st = FPREG_ADDR( fxsave, (i - tos) & 7 );
-
- switch (st->exponent & 0x7fff) {
- case 0x7fff:
- tag = 2; /* Special */
- break;
- case 0x0000:
- if ( !st->significand[0] &&
- !st->significand[1] &&
- !st->significand[2] &&
- !st->significand[3] ) {
- tag = 1; /* Zero */
- } else {
- tag = 2; /* Special */
- }
- break;
- default:
- if (st->significand[3] & 0x8000) {
- tag = 0; /* Valid */
- } else {
- tag = 2; /* Special */
- }
- break;
- }
- } else {
- tag = 3; /* Empty */
- }
- ret |= (tag << (2 * i));
- twd = twd >> 1;
- }
- return ret;
-}
-
-
-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;
- u32 v;
- int err = 0;
-
-#define G(num,val) err |= __get_user(val, num + (u32 __user *)buf)
- 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);
- fxsave->fop = v>>16; /* cs ignored */
- G(5, fxsave->rdp);
- /* 6: ds ignored */
-#undef G
- 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;
-}
-
-
-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;
- u16 cs,ds;
- int err = 0;
-
- 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;
- }
-
-#define P(num,val) err |= __put_user(val, num + (u32 __user *)buf)
- 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);
-#undef P
-
- 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);
- if (fsave)
- return err ? -1 : 1;
- 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;
-}