2014-06-18 Charles Baylis <charles.baylis@linaro.org>
+ * config/arm/bpabi.S (__aeabi_ldivmod): Perform division using
+ __udivmoddi4, and fixups for negative operands.
+
+2014-06-18 Charles Baylis <charles.baylis@linaro.org>
+
* config/arm/bpabi.S (__aeabi_ldivmod): Optimise stack manipulation.
2014-06-18 Charles Baylis <charles.baylis@linaro.org>
test_div_by_zero signed
push_for_divide __aeabi_ldivmod
+ cmp xxh, #0
+ blt 1f
+ cmp yyh, #0
+ blt 2f
+ /* arguments in (r0:r1), (r2:r3) and *sp */
+ bl SYM(__udivmoddi4) __PLT__
+ pop_for_divide
+ RET
+
+1: /* xxh:xxl is negative */
+ negs xxl, xxl
+ sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
+ cmp yyh, #0
+ blt 3f
+ /* arguments in (r0:r1), (r2:r3) and *sp */
+ bl SYM(__udivmoddi4) __PLT__
+ pop_for_divide
+ negs xxl, xxl
+ sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
+ negs yyl, yyl
+ sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
+ RET
+
+2: /* only yyh:yyl is negative */
+ negs yyl, yyl
+ sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
+ /* arguments in (r0:r1), (r2:r3) and *sp */
+ bl SYM(__udivmoddi4) __PLT__
+ pop_for_divide
+ negs xxl, xxl
+ sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
+ RET
+
+3: /* both xxh:xxl and yyh:yyl are negative */
+ negs yyl, yyl
+ sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
/* arguments in (r0:r1), (r2:r3) and *sp */
- bl SYM(__gnu_ldivmod_helper) __PLT__
+ bl SYM(__udivmoddi4) __PLT__
pop_for_divide
+ negs yyl, yyl
+ sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
RET
+
cfi_end LSYM(Lend_aeabi_ldivmod)
#endif /* L_aeabi_ldivmod */