From d94448b1fdc91ee1d235607f6bbe595464e4fbb9 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 30 Jan 2008 13:30:07 +0100 Subject: x86: clean up arch/x86/ia32/fpu32.c White space and coding style clenaup. Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/ia32/fpu32.c | 134 +++++++++++++++++++++++++------------------------- 1 file changed, 67 insertions(+), 67 deletions(-) (limited to 'arch/x86/ia32') diff --git a/arch/x86/ia32/fpu32.c b/arch/x86/ia32/fpu32.c index 2c8209a3605a..459bf743128f 100644 --- a/arch/x86/ia32/fpu32.c +++ b/arch/x86/ia32/fpu32.c @@ -1,8 +1,8 @@ -/* +/* * 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 #include @@ -13,96 +13,97 @@ 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; + 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 = NULL; + 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; -#define FPREG_ADDR(f, n) ((void *)&(f)->st_space + (n) * 16); - - for (i = 0 ; i < 8 ; i++) { + for (i = 0; i < 8; i++, twd >>= 1) { if (twd & 0x1) { - st = FPREG_ADDR( fxsave, (i - tos) & 7 ); + st = FPREG_ADDR(fxsave, (i - tos) & 7); switch (st->exponent & 0x7fff) { case 0x7fff: - tag = 2; /* Special */ + tag = FP_EXP_TAG_SPECIAL; break; case 0x0000: - if ( !st->significand[0] && - !st->significand[1] && - !st->significand[2] && - !st->significand[3] ) { - tag = 1; /* Zero */ - } else { - tag = 2; /* Special */ - } + 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 = 0; /* Valid */ - } else { - tag = 2; /* Special */ - } + if (st->significand[3] & 0x8000) + tag = FP_EXP_TAG_VALID; + else + tag = FP_EXP_TAG_SPECIAL; break; } } else { - tag = 3; /* Empty */ + tag = FP_EXP_TAG_EMPTY; } - ret |= (tag << (2 * i)); - twd = twd >> 1; + 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; + int i, err = 0; 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 */ + /* cs ignored */ + fxsave->fop = v>>16; G(5, fxsave->rdp); /* 6: ds ignored */ -#undef G - if (err) - return -1; + if (err) + return -1; to = (struct _fpxreg *)&fxsave->st_space[0]; from = &buf->_st[0]; - for (i = 0 ; i < 8 ; i++, to++, from++) { + 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, @@ -111,60 +112,59 @@ static inline int convert_fxsr_to_user(struct _fpstate_ia32 __user *buf, { struct _fpreg __user *to; struct _fpxreg *from; - int i; - u16 cs,ds; - int err = 0; + 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. */ + /* + * 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(4, cs | ((u32)fxsave->fop) << 16); P(5, fxsave->rdp); P(6, 0xffff0000 | ds); -#undef P - if (err) - return -1; + if (err) + return -1; to = &buf->_st[0]; from = (struct _fpxreg *) &fxsave->st_space[0]; - for ( i = 0 ; i < 8 ; i++, to++, from++ ) { + 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) -{ +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, + 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 save_i387_ia32(struct task_struct *tsk, struct _fpstate_ia32 __user *buf, + struct pt_regs *regs, int fsave) { int err = 0; @@ -174,8 +174,8 @@ int save_i387_ia32(struct task_struct *tsk, if (fsave) return 0; err |= __put_user(tsk->thread.i387.fxsave.swd, &buf->status); - if (fsave) - return err ? -1 : 1; + 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)); -- cgit v1.2.3