165 lines
3.9 KiB
ArmAsm
165 lines
3.9 KiB
ArmAsm
/* Copyright (C) 2011-2015 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@redhat.com>.
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This file is part of the GNU Transactional Memory Library (libitm).
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Libitm is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "hwcap.h"
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#include "asmcfi.h"
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.syntax unified
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#if defined(__thumb2__)
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# define PC_OFS 4
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.thumb
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.thumb_func
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#else
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# define PC_OFS 8
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#endif
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#if defined (__thumb2__) && defined(__ARM_ARCH_6T2__)
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# define HAVE_MOVT
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.arch armv6t2
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#elif defined (__ARM_ARCH_7A__)
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# define HAVE_MOVT
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.arch armv7-a
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#elif defined (__ARM_ARCH_7R__)
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# define HAVE_MOVT
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.arch armv7-r
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#elif defined (__ARM_ARCH_7M__)
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# define HAVE_MOVT
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.arch armv7-m
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#endif
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#if defined(HAVE_MOVT) && defined(PIC)
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.macro ldaddr reg, addr
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movw \reg, #:lower16:(\addr - (98f + PC_OFS))
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movt \reg, #:upper16:(\addr - (98f + PC_OFS))
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98: add \reg, \reg, pc
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.endm
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#elif defined(HAVE_MOVT)
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.macro ldaddr reg, addr
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movw \reg, #:lower16:\addr
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movt \reg, #:upper16:\addr
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.endm
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#elif defined(PIC)
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.macro ldaddr reg, addr
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ldr \reg, 99f
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98: add \reg, \reg, pc
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.subsection 1
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.align 2
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99: .word \addr - (98b + PC_OFS)
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.subsection 0
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.endm
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#else
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.macro ldaddr reg, addr
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ldr \reg, =\addr
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.endm
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#endif
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.text
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.align 2
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.global _ITM_beginTransaction
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.type _ITM_beginTransaction, %function
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_ITM_beginTransaction:
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.fnstart
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cfi_startproc
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mov ip, sp
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push { r4-r11, ip, lr }
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.save { lr }
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.pad #(9*4)
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cfi_adjust_cfa_offset(40)
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cfi_rel_offset(lr, 36)
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sub sp, sp, #(14*8)
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.pad #(14*8)
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cfi_adjust_cfa_offset(14*8)
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ldaddr r2, GTM_hwcap
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ldr r2, [r2]
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/* Store the VFP registers. Don't use VFP instructions directly
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because this code is used in non-VFP multilibs. */
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tst r2, #HWCAP_ARM_VFP
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beq 1f
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stc p11, cr8, [sp], {16} /* vstm sp, {d8-d15} */
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1:
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/* Save the call-preserved iWMMXt registers. */
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tst r2, #HWCAP_ARM_IWMMXT
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beq 1f
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stcl p1, cr10, [sp, #64] /* wstrd wr10, [sp, #64] */
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stcl p1, cr11, [sp, #72]
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stcl p1, cr12, [sp, #80]
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stcl p1, cr13, [sp, #88]
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stcl p1, cr14, [sp, #96]
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stcl p1, cr15, [sp, #104]
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1:
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/* Invoke GTM_begin_transaction with the struct we just built. */
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mov r1, sp
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bl GTM_begin_transaction
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/* Return; we don't need to restore any of the call-saved regs. */
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add sp, sp, #(14*8 + 9*4)
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cfi_adjust_cfa_offset(-(14*8 + 9*4))
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pop { pc }
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.fnend
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cfi_endproc
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.size _ITM_beginTransaction, . - _ITM_beginTransaction
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.align 2
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.global GTM_longjmp
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.hidden GTM_longjmp
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.type GTM_longjmp, %function
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GTM_longjmp:
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cfi_startproc
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ldaddr r2, GTM_hwcap
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ldr r2, [r2]
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tst r2, #HWCAP_ARM_VFP
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beq 1f
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ldc p11, cr8, [r1], {16} /* vldmia r1, {d8-d15} */
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1:
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tst r2, #HWCAP_ARM_IWMMXT
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beq 1f
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ldcl p1, cr10, [r1, #64] /* wldrd wr10, [r1, #64] */
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ldcl p1, cr11, [r1, #72]
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ldcl p1, cr12, [r1, #80]
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ldcl p1, cr13, [r1, #88]
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ldcl p1, cr14, [r1, #96]
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ldcl p1, cr15, [r1, #104]
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1:
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add r1, r1, #(14*8) /* Skip both VFP and iWMMXt blocks */
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#ifdef __thumb2__
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ldm r1, { r4-r11, ip, lr }
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cfi_def_cfa(ip, 0)
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mov sp, ip
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bx lr
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#else
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ldm r1, { r4-r11, sp, pc }
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#endif
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cfi_endproc
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.size GTM_longjmp, . - GTM_longjmp
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#ifdef __linux__
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.section .note.GNU-stack, "", %progbits
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#endif
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