x86/fpu/math-emu: Add support for FCMOVcc insns
Run-tested by booting with "no387 nofxsr" and running test
program:
[RUN] Testing fcmovCC instructions
[OK] fcmovCC
Signed-off-by: Denys 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/1442588010-20055-3-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/arch/x86/math-emu/fpu_entry.c b/arch/x86/math-emu/fpu_entry.c
index 4ecf683..e945fed 100644
--- a/arch/x86/math-emu/fpu_entry.c
+++ b/arch/x86/math-emu/fpu_entry.c
@@ -40,7 +40,7 @@
#define __BAD__ FPU_illegal /* Illegal on an 80486, causes SIGILL */
-/* f(u)comi(p) are enabled if CPUID(1).EDX(15) "cmov" is set */
+/* fcmovCC and f(u)comi(p) are enabled if CPUID(1).EDX(15) "cmov" is set */
/* WARNING: "u" entries are not documented by Intel in their 80486 manual
and may not work on FPU clones or later Intel FPUs.
@@ -49,13 +49,13 @@
static FUNC const st_instr_table[64] = {
/* Opcode: d8 d9 da db */
/* dc dd de df */
-/* c0..7 */ fadd__, fld_i_, __BAD__, __BAD__,
+/* c0..7 */ fadd__, fld_i_, fcmovb, fcmovnb,
/* c0..7 */ fadd_i, ffree_, faddp_, ffreep,/*u*/
-/* c8..f */ fmul__, fxch_i, __BAD__, __BAD__,
+/* c8..f */ fmul__, fxch_i, fcmove, fcmovne,
/* c8..f */ fmul_i, fxch_i,/*u*/ fmulp_, fxch_i,/*u*/
-/* d0..7 */ fcom_st, fp_nop, __BAD__, __BAD__,
+/* d0..7 */ fcom_st, fp_nop, fcmovbe, fcmovnbe,
/* d0..7 */ fcom_st,/*u*/ fst_i_, fcompst,/*u*/ fstp_i,/*u*/
-/* d8..f */ fcompst, fstp_i,/*u*/ __BAD__, __BAD__,
+/* d8..f */ fcompst, fstp_i,/*u*/ fcmovu, fcmovnu,
/* d8..f */ fcompst,/*u*/ fstp_i, fcompp, fstp_i,/*u*/
/* e0..7 */ fsub__, FPU_etc, __BAD__, finit_,
/* e0..7 */ fsubri, fucom_, fsubrp, fstsw_,
@@ -80,10 +80,10 @@
static u_char const type_table[64] = {
/* Opcode: d8 d9 da db dc dd de df */
-/* c0..7 */ _REGI_, _NONE_, _null_, _null_, _REGIi, _REGi_, _REGIp, _REGi_,
-/* c8..f */ _REGI_, _REGIn, _null_, _null_, _REGIi, _REGI_, _REGIp, _REGI_,
-/* d0..7 */ _REGIc, _NONE_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
-/* d8..f */ _REGIc, _REG0_, _null_, _null_, _REGIc, _REG0_, _REGIc, _REG0_,
+/* c0..7 */ _REGI_, _NONE_, _REGIn, _REGIn, _REGIi, _REGi_, _REGIp, _REGi_,
+/* c8..f */ _REGI_, _REGIn, _REGIn, _REGIn, _REGIi, _REGI_, _REGIp, _REGI_,
+/* d0..7 */ _REGIc, _NONE_, _REGIn, _REGIn, _REGIc, _REG0_, _REGIc, _REG0_,
+/* d8..f */ _REGIc, _REG0_, _REGIn, _REGIn, _REGIc, _REG0_, _REGIc, _REG0_,
/* e0..7 */ _REGI_, _NONE_, _null_, _NONE_, _REGIi, _REGIc, _REGIp, _NONE_,
/* e8..f */ _REGI_, _NONE_, _REGIc, _REGIc, _REGIi, _REGIc, _REGIp, _REGIc,
/* f0..7 */ _REGI_, _NONE_, _null_, _REGIc, _REGIi, _null_, _REGIp, _REGIc,