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lib1funcs.asm (ctzsi2): New function. 

* arm/lib1funcs.asm (ctzsi2): New function.
* arm/t-elf (LIB1ASMFUNCS): Add _ctzsi2.
* arm/t-linux (LIB1ASMFUNCS): Likewise.
* arm/t-strongarm-elf (LIB1ASMFUNCS): Likewise.
* arm/t-symbian (LIB1ASMFUNCS): Likewise.
* arm/t-vxworks (LIB1ASMFUNCS): Likewise.
* arm/t-wince-pe (LIB1ASMFUNCS): Likewise.

From-SVN: r185698
This commit is contained in:
Richard Earnshaw 2012-03-22 15:14:46 +00:00 committed by Richard Earnshaw
parent b4e93f4518
commit 06ea73711d
8 changed files with 80 additions and 6 deletions
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10
libgcc/ChangeLog
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@ -1,3 +1,13 @@
2012-03-22 Richard Earnshaw <rearnsha@arm.com>
* arm/lib1funcs.asm (ctzsi2): New function.
* arm/t-elf (LIB1ASMFUNCS): Add _ctzsi2.
* arm/t-linux (LIB1ASMFUNCS): Likewise.
* arm/t-strongarm-elf (LIB1ASMFUNCS): Likewise.
* arm/t-symbian (LIB1ASMFUNCS): Likewise.
* arm/t-vxworks (LIB1ASMFUNCS): Likewise.
* arm/t-wince-pe (LIB1ASMFUNCS): Likewise.
2012-03-21 Andreas Tobler <andreast@fgznet.ch>
* config.host: Add bits to support powerpc64-*-freebsd*.

64
libgcc/config/arm/lib1funcs.S
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@ -1594,6 +1594,70 @@ ARM_FUNC_START clzdi2
#endif
#endif /* L_clzdi2 */
#ifdef L_ctzsi2
#if defined(__ARM_ARCH_6M__)
FUNC_START ctzsi2
neg r1, r0
and r0, r0, r1
mov r1, #28
mov r3, #1
lsl r3, r3, #16
cmp r0, r3 /* 0x10000 */
bcc 2f
lsr r0, r0, #16
sub r1, r1, #16
2: lsr r3, r3, #8
cmp r0, r3 /* #0x100 */
bcc 2f
lsr r0, r0, #8
sub r1, r1, #8
2: lsr r3, r3, #4
cmp r0, r3 /* #0x10 */
bcc 2f
lsr r0, r0, #4
sub r1, r1, #4
2: adr r2, 1f
ldrb r0, [r2, r0]
sub r0, r0, r1
bx lr
.align 2
1:
.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
FUNC_END ctzsi2
#else
ARM_FUNC_START ctzsi2
rsb r1, r0, #0
and r0, r0, r1
# if defined(HAVE_ARM_CLZ)
clz r0, r0
rsb r0, r0, #31
RET
# else
mov r1, #28
cmp r0, #0x10000
do_it cs, t
movcs r0, r0, lsr #16
subcs r1, r1, #16
cmp r0, #0x100
do_it cs, t
movcs r0, r0, lsr #8
subcs r1, r1, #8
cmp r0, #0x10
do_it cs, t
movcs r0, r0, lsr #4
subcs r1, r1, #4
adr r2, 1f
ldrb r0, [r2, r0]
sub r0, r0, r1
RET
.align 2
1:
.byte 27, 28, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 31, 31, 31, 31
# endif /* !HAVE_ARM_CLZ */
FUNC_END ctzsi2
#endif
#endif /* L_clzsi2 */
/* ------------------------------------------------------------------------ */
/* These next two sections are here despite the fact that they contain Thumb
assembler because their presence allows interworked code to be linked even

2
libgcc/config/arm/t-elf
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@ -10,7 +10,7 @@ LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func \
_arm_truncdfsf2 _arm_negsf2 _arm_addsubsf3 _arm_muldivsf3 \
_arm_cmpsf2 _arm_unordsf2 _arm_fixsfsi _arm_fixunssfsi \
_arm_floatdidf _arm_floatdisf _arm_floatundidf _arm_floatundisf \
_clzsi2 _clzdi2
_clzsi2 _clzdi2 _ctzsi2
# Currently there is a bug somewhere in GCC's alias analysis
# or scheduling code that is breaking _fpmul_parts in fp-bit.c.

2
libgcc/config/arm/t-linux
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@ -1,6 +1,6 @@
LIB1ASMSRC = arm/lib1funcs.S
LIB1ASMFUNCS = _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_lnx _clzsi2 _clzdi2 \
_arm_addsubdf3 _arm_addsubsf3
_ctzsi2 _arm_addsubdf3 _arm_addsubsf3
# Just for these, we omit the frame pointer since it makes such a big
# difference.

2
libgcc/config/arm/t-strongarm-elf
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@ -1,4 +1,4 @@
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func _clzsi2 _clzdi2
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func _clzsi2 _clzdi2 _ctzsi2
# Currently there is a bug somewhere in GCC's alias analysis
# or scheduling code that is breaking _fpmul_parts in fp-bit.c.

2
libgcc/config/arm/t-symbian
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@ -1,4 +1,4 @@
LIB1ASMFUNCS += _bb_init_func _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2
LIB1ASMFUNCS += _bb_init_func _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2 _ctzsi2
# These functions have __aeabi equivalents and will never be called by GCC.
# By putting them in LIB1ASMFUNCS, we avoid the standard libgcc2.c code being

2
libgcc/config/arm/t-vxworks
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@ -1 +1 @@
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2 _ctzsi2

2
libgcc/config/arm/t-wince-pe
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@ -1 +1 @@
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _call_via_rX _interwork_call_via_rX _clzsi2 _clzdi2 _ctzsi2