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linux-next/arch/x86/math-emu/shr_Xsig.S
Jiri Slaby 6d685e5318 x86/asm/32: Change all ENTRY+ENDPROC to SYM_FUNC_*
These are all functions which are invoked from elsewhere, so annotate
them as global using the new SYM_FUNC_START and their ENDPROC's by
SYM_FUNC_END.

Now, ENTRY/ENDPROC can be forced to be undefined on X86, so do so.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Allison Randal <allison@lohutok.net>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Bill Metzenthen <billm@melbpc.org.au>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: linux-efi <linux-efi@vger.kernel.org>
Cc: linux-efi@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: platform-driver-x86@vger.kernel.org
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191011115108.12392-28-jslaby@suse.cz
2019-10-18 12:03:43 +02:00

90 lines
2.5 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0 */
.file "shr_Xsig.S"
/*---------------------------------------------------------------------------+
| shr_Xsig.S |
| |
| 12 byte right shift function |
| |
| Copyright (C) 1992,1994,1995 |
| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
| Australia. E-mail billm@jacobi.maths.monash.edu.au |
| |
| Call from C as: |
| void shr_Xsig(Xsig *arg, unsigned nr) |
| |
| Extended shift right function. |
| Fastest for small shifts. |
| Shifts the 12 byte quantity pointed to by the first arg (arg) |
| right by the number of bits specified by the second arg (nr). |
| |
+---------------------------------------------------------------------------*/
#include "fpu_emu.h"
.text
SYM_FUNC_START(shr_Xsig)
push %ebp
movl %esp,%ebp
pushl %esi
movl PARAM2,%ecx
movl PARAM1,%esi
cmpl $32,%ecx /* shrd only works for 0..31 bits */
jnc L_more_than_31
/* less than 32 bits */
pushl %ebx
movl (%esi),%eax /* lsl */
movl 4(%esi),%ebx /* midl */
movl 8(%esi),%edx /* msl */
shrd %cl,%ebx,%eax
shrd %cl,%edx,%ebx
shr %cl,%edx
movl %eax,(%esi)
movl %ebx,4(%esi)
movl %edx,8(%esi)
popl %ebx
popl %esi
leave
ret
L_more_than_31:
cmpl $64,%ecx
jnc L_more_than_63
subb $32,%cl
movl 4(%esi),%eax /* midl */
movl 8(%esi),%edx /* msl */
shrd %cl,%edx,%eax
shr %cl,%edx
movl %eax,(%esi)
movl %edx,4(%esi)
movl $0,8(%esi)
popl %esi
leave
ret
L_more_than_63:
cmpl $96,%ecx
jnc L_more_than_95
subb $64,%cl
movl 8(%esi),%eax /* msl */
shr %cl,%eax
xorl %edx,%edx
movl %eax,(%esi)
movl %edx,4(%esi)
movl %edx,8(%esi)
popl %esi
leave
ret
L_more_than_95:
xorl %eax,%eax
movl %eax,(%esi)
movl %eax,4(%esi)
movl %eax,8(%esi)
popl %esi
leave
ret
SYM_FUNC_END(shr_Xsig)