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authorDenys Vlasenko <dvlasenk@redhat.com>2015-08-27 21:15:28 +0300
committerIngo Molnar <mingo@kernel.org>2015-09-15 09:01:46 +0300
commit73477bbb09e7022063d1737c7322ad2e08968c23 (patch)
tree01ff5fda5d3a480fd69ba76b110bd65b4da5e516 /arch/x86/math-emu/fpu_entry.c
parentef78f2a4bf84d8db9f36868decca2dc24e02a6af (diff)
downloadlinux-73477bbb09e7022063d1737c7322ad2e08968c23.tar.xz
x86/fpu/math-emu: Remove !NO_UNDOC_CODE
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>
Diffstat (limited to 'arch/x86/math-emu/fpu_entry.c')
-rw-r--r--arch/x86/math-emu/fpu_entry.c36
1 files changed, 0 insertions, 36 deletions
diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index 3d8f2e421466..929b1d500823 100644
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -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 */