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Commit 4aef363e authored by Denys Vlasenko's avatar Denys Vlasenko Committed by Ingo Molnar
Browse files

x86/fpu/math-emu: Remove define layer for undocumented opcodes 



No code changes.

Signed-off-by: default avatarDenys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
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>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1442588010-20055-1-git-send-email-dvlasenk@redhat.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 57ca6897

arch/x86/math-emu/fpu_entry.c

+21 −22
Original line number Diff line number Diff line
@@ -40,30 +40,29 @@ 


#define __BAD__ FPU_illegal	/* Illegal on an 80486, causes SIGILL */



/* WARNING: These codes are not documented by Intel in their 80486 manual

   and may not work on FPU clones or later Intel FPUs. */



/* Changes to support the un-doc codes provided by Linus Torvalds. */



#define _d9_d8_ fstp_i		/* unofficial code (19) */

#define _dc_d0_ fcom_st		/* unofficial code (14) */

#define _dc_d8_ fcompst		/* unofficial code (1c) */

#define _dd_c8_ fxch_i		/* unofficial code (0d) */

#define _de_d0_ fcompst		/* unofficial code (16) */

#define _df_c0_ ffreep		/* unofficial code (07) ffree + pop */

#define _df_c8_ fxch_i		/* unofficial code (0f) */

#define _df_d0_ fstp_i		/* unofficial code (17) */

#define _df_d8_ fstp_i		/* unofficial code (1f) */

/* WARNING: "u" entries are not documented by Intel in their 80486 manual

   and may not work on FPU clones or later Intel FPUs.

   Changes to support them provided by Linus Torvalds. */



static FUNC const st_instr_table[64] = {

	fadd__, fld_i_, __BAD__, __BAD__, fadd_i, ffree_, faddp_, _df_c0_,

	fmul__, fxch_i, __BAD__, __BAD__, fmul_i, _dd_c8_, fmulp_, _df_c8_,

	fcom_st, fp_nop, __BAD__, __BAD__, _dc_d0_, fst_i_, _de_d0_, _df_d0_,

	fcompst, _d9_d8_, __BAD__, __BAD__, _dc_d8_, fstp_i, fcompp, _df_d8_,

	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__,

/* Opcode:	d8		d9		da		db */

/*		dc		dd		de		df */

/* c0..7 */	fadd__,		fld_i_,		__BAD__,	__BAD__,

/* c0..7 */	fadd_i,		ffree_,		faddp_,		ffreep,/*u*/

/* c8..f */	fmul__,		fxch_i,		__BAD__,	__BAD__,

/* c8..f */	fmul_i,		fxch_i,/*u*/	fmulp_,		fxch_i,/*u*/

/* d0..7 */	fcom_st,	fp_nop,		__BAD__,	__BAD__,

/* d0..7 */	fcom_st,/*u*/	fst_i_,		fcompst,/*u*/	fstp_i,/*u*/

/* d8..f */	fcompst,	fstp_i,/*u*/	__BAD__,	__BAD__,

/* d8..f */	fcompst,/*u*/	fstp_i,		fcompp,		fstp_i,/*u*/

/* e0..7 */	fsub__,		FPU_etc,	__BAD__,	finit_,

/* e0..7 */	fsubri,		fucom_,		fsubrp,		fstsw_,

/* e8..f */	fsubr_,		fconst,		fucompp,	__BAD__,

/* e8..f */	fsub_i,		fucomp,		fsubp_,		__BAD__,

/* f0..7 */	fdiv__,		FPU_triga,	__BAD__,	__BAD__,

/* f0..7 */	fdivri,		__BAD__,	fdivrp,		__BAD__,

/* f8..f */	fdivr_,		FPU_trigb,	__BAD__,	__BAD__,

/* f8..f */	fdiv_i,		__BAD__,	fdivp_,		__BAD__,

};



#define _NONE_ 0		/* Take no special action */