75 lines
2 KiB
ArmAsm
75 lines
2 KiB
ArmAsm
|
/* $NetBSD: udivsi3.S,v 1.9 2013/09/12 15:36:14 joerg Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <machine/asm.h>
|
||
|
|
|
||
|
|
#if defined(__ARM_EABI__) && defined(__thumb__) && !defined(_ARM_ARCH_T2)
|
||
|
|
ARM_ENTRY(__udivsi3)
|
||
|
|
#else
|
||
|
|
ENTRY(__udivsi3)
|
||
|
|
#endif
|
||
|
|
#if defined(__ARM_ARCH_EXT_IDIV__)
|
||
|
|
# if defined(__ARM_EABI__)
|
||
|
|
mov r3, r0 @ save for mls
|
||
|
|
# endif
|
||
|
|
udiv r0, r0, r1
|
||
|
|
# if defined(__ARM_EABI__)
|
||
|
|
mls r1, r0, r1, r3 @ return modulus in r1
|
||
|
|
# endif
|
||
|
|
RET
|
||
|
|
#elif defined(__ARM_EABI__) && defined(_LIBC)
|
||
|
|
cmp r1, #0
|
||
|
|
beq .Ldiv0
|
||
|
|
ldr r2, .Lhwdiv_present
|
||
|
|
#ifdef __PIC__
|
||
|
|
add r2, r2, pc /* pc = &.LPIC0 */
|
||
|
|
# endif
|
||
|
|
ldr r2, [r2]
|
||
|
|
.LPIC0: cmp r2, #0
|
||
|
|
beq __udivide
|
||
|
|
mov r3, r0
|
||
|
|
# if defined(__ARM_ARCH_EXT_IDIV__)
|
||
|
|
udiv r0, r0, r1
|
||
|
|
mls r1, r0, r1, r3 /* return modulus in r1 */
|
||
|
|
# elif defined(__thumb__) && defined(_ARM_ARCH_T2)
|
||
|
|
.inst.w 0xfbb0f0f1
|
||
|
|
.inst.w 0xfb003111
|
||
|
|
# else
|
||
|
|
.inst 0xe730f110
|
||
|
|
.inst 0xe0613190
|
||
|
|
# endif
|
||
|
|
RET
|
||
|
|
|
||
|
|
.align 0
|
||
|
|
.Lhwdiv_present:
|
||
|
|
.word REL_SYM(_libc_arm_hwdiv_present, .LPIC0)
|
||
|
|
|
||
|
|
/* Handle divide by zero */
|
||
|
|
.align 0
|
||
|
|
.Ldiv0: push {r0, lr} /* save r0 */
|
||
|
|
mvns r0, #0 /* thumb2 */
|
||
|
|
bl _C_LABEL(__aeabi_idiv0)
|
||
|
|
pop {r1, pc} /* restore r0 as r1 */
|
||
|
|
#else
|
||
|
|
b __udivide
|
||
|
|
#endif
|
||
|
|
END(__udivsi3)
|
||
|
|
|
||
|
|
#ifdef __ARM_EABI__
|
||
|
|
STRONG_ALIAS(__aeabi_uidivmod, __udivsi3)
|
||
|
|
STRONG_ALIAS(__aeabi_uidiv, __udivsi3)
|
||
|
|
#endif
|