* 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
+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*.
#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
_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.
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.
-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.
-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
-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
-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