3d0d14f983
lindent these files:
errors lines of code errors/KLOC
arch/x86/math-emu/ 2236 9424 237.2
arch/x86/math-emu/ 128 8706 14.7
no other changes. No code changed:
text data bss dec hex filename
5589802 612739 3833856 10036397 9924ad vmlinux.before
5589802 612739 3833856 10036397 9924ad vmlinux.after
the intent of this patch is to ease the automated tracking of kernel
code quality - it's just much easier for us to maintain it if every file
in arch/x86 is supposed to be clean.
NOTE: it is a known problem of lindent that it causes some style damage
of its own, but it's a safe tool (well, except for the gcc array range
initializers extension), so we did the bulk of the changes via lindent,
and did the manual fixups in a followup patch.
the resulting math-emu code has been tested by Thomas Gleixner on a real
386 DX CPU as well, and it works fine.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*---------------------------------------------------------------------------+
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| fpu_tags.c |
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| Set FPU register tags. |
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| Copyright (C) 1997 |
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| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
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| E-mail billm@jacobi.maths.monash.edu.au |
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+---------------------------------------------------------------------------*/
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#include "fpu_emu.h"
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#include "fpu_system.h"
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#include "exception.h"
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void FPU_pop(void)
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{
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fpu_tag_word |= 3 << ((top & 7) * 2);
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top++;
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}
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int FPU_gettag0(void)
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{
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return (fpu_tag_word >> ((top & 7) * 2)) & 3;
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}
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int FPU_gettagi(int stnr)
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{
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return (fpu_tag_word >> (((top + stnr) & 7) * 2)) & 3;
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}
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int FPU_gettag(int regnr)
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{
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return (fpu_tag_word >> ((regnr & 7) * 2)) & 3;
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}
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void FPU_settag0(int tag)
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{
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int regnr = top;
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regnr &= 7;
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fpu_tag_word &= ~(3 << (regnr * 2));
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fpu_tag_word |= (tag & 3) << (regnr * 2);
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}
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void FPU_settagi(int stnr, int tag)
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{
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int regnr = stnr + top;
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regnr &= 7;
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fpu_tag_word &= ~(3 << (regnr * 2));
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fpu_tag_word |= (tag & 3) << (regnr * 2);
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}
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void FPU_settag(int regnr, int tag)
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{
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regnr &= 7;
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fpu_tag_word &= ~(3 << (regnr * 2));
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fpu_tag_word |= (tag & 3) << (regnr * 2);
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}
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int FPU_Special(FPU_REG const *ptr)
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{
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int exp = exponent(ptr);
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if (exp == EXP_BIAS + EXP_UNDER)
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return TW_Denormal;
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else if (exp != EXP_BIAS + EXP_OVER)
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return TW_NaN;
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else if ((ptr->sigh == 0x80000000) && (ptr->sigl == 0))
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return TW_Infinity;
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return TW_NaN;
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}
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int isNaN(FPU_REG const *ptr)
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{
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return ((exponent(ptr) == EXP_BIAS + EXP_OVER)
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&& !((ptr->sigh == 0x80000000) && (ptr->sigl == 0)));
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}
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int FPU_empty_i(int stnr)
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{
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int regnr = (top + stnr) & 7;
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return ((fpu_tag_word >> (regnr * 2)) & 3) == TAG_Empty;
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}
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int FPU_stackoverflow(FPU_REG ** st_new_ptr)
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{
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*st_new_ptr = &st(-1);
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return ((fpu_tag_word >> (((top - 1) & 7) * 2)) & 3) != TAG_Empty;
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}
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void FPU_copy_to_regi(FPU_REG const *r, u_char tag, int stnr)
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{
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reg_copy(r, &st(stnr));
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FPU_settagi(stnr, tag);
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}
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void FPU_copy_to_reg1(FPU_REG const *r, u_char tag)
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{
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reg_copy(r, &st(1));
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FPU_settagi(1, tag);
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}
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void FPU_copy_to_reg0(FPU_REG const *r, u_char tag)
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{
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int regnr = top;
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regnr &= 7;
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reg_copy(r, &st(0));
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fpu_tag_word &= ~(3 << (regnr * 2));
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fpu_tag_word |= (tag & 3) << (regnr * 2);
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}
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