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x86/fpu/math-emu: Remove !NO_UNDOC_CODE

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We always want to support all FPU opcodes, including
undocumented ones. That define was fully justified ~20 years ago
but not today. Let's not complicate the code with it.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1440699330-1305-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Denys Vlasenko 2015-08-27 20:15:28 +02:00 committed by Ingo Molnar
parent ef78f2a4bf
commit 73477bbb09
1 changed files with 0 additions and 36 deletions
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36
arch/x86/math-emu/fpu_entry.c
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@ -40,8 +40,6 @@
#define __BAD__ FPU_illegal /* Illegal on an 80486, causes SIGILL */
#ifndef NO_UNDOC_CODE /* Un-documented FPU op-codes supported by default. */
/* WARNING: These codes are not documented by Intel in their 80486 manual
and may not work on FPU clones or later Intel FPUs. */
@ -68,21 +66,6 @@ static FUNC const st_instr_table[64] = {
fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__,
};
#else /* Support only documented FPU op-codes */
static FUNC const st_instr_table[64] = {
fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, __BAD__,
fmul__, fxch_i, __BAD__, __BAD__, fmul_i, __BAD__, fmulp_, __BAD__,
fcom_st, fp_nop, __BAD__, __BAD__, __BAD__, fst_i_, __BAD__, __BAD__,
fcompst, __BAD__, __BAD__, __BAD__, __BAD__, fstp_i, fcompp, __BAD__,
fsub__, FPU_etc, __BAD__, finit_, fsubri, fucom_, fsubrp, fstsw_,
fsubr_, fconst, fucompp, __BAD__, fsub_i, fucomp, fsubp_, __BAD__,
fdiv__, FPU_triga, __BAD__, __BAD__, fdivri, __BAD__, fdivrp, __BAD__,
fdivr_, FPU_trigb, __BAD__, __BAD__, fdiv_i, __BAD__, fdivp_, __BAD__,
};
#endif /* NO_UNDOC_CODE */
#define _NONE_ 0 /* Take no special action */
#define _REG0_ 1 /* Need to check for not empty st(0) */
#define _REGI_ 2 /* Need to check for not empty st(0) and st(rm) */
@ -94,10 +77,6 @@ static FUNC const st_instr_table[64] = {
#define _REGIc 0 /* Compare st(0) and st(rm) */
#define _REGIn 0 /* Uses st(0) and st(rm), but handle checks later */
#ifndef NO_UNDOC_CODE
/* Un-documented FPU op-codes supported by default. (see above) */
static u_char const type_table[64] = {
_REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _REGi_,
_REGI_, _REGIn, _null_, _null_, _REGIi, _REGI_, _REGIp, _REGI_,
@ -109,21 +88,6 @@ static u_char const type_table[64] = {
_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
};
#else /* Support only documented FPU op-codes */
static u_char const type_table[64] = {
_REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _null_,
_REGI_, _REGIn, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
_REGIc, _NONE_, _null_, _null_, _null_, _REG0_, _null_, _null_,
_REGIc, _null_, _null_, _null_, _null_, _REG0_, _REGIc, _null_,
_REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
_REGI_, _NONE_, _REGIc, _null_, _REGIi, _REGIc, _REGIp, _null_,
_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_,
_REGI_, _NONE_, _null_, _null_, _REGIi, _null_, _REGIp, _null_
};
#endif /* NO_UNDOC_CODE */
#ifdef RE_ENTRANT_CHECKING
u_char emulating = 0;
#endif /* RE_ENTRANT_CHECKING */