| Message ID | 1402481995-12749-6-git-send-email-charles.baylis@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 11/06/14 11:19, Charles Baylis wrote: > 2014-05-22 Charles Baylis <charles.baylis@linaro.org> > > * config/arm/bpabi.S (__aeabi_ldivmod): Perform division using > __udivmoddi4, and fixups for negative operands. OK. > --- > libgcc/config/arm/bpabi.S | 41 ++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 40 insertions(+), 1 deletion(-) > > diff --git a/libgcc/config/arm/bpabi.S b/libgcc/config/arm/bpabi.S > index 3f9ece5..c044167 100644 > --- a/libgcc/config/arm/bpabi.S > +++ b/libgcc/config/arm/bpabi.S > @@ -175,10 +175,49 @@ ARM_FUNC_START aeabi_ldivmod > 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 */ >
diff --git a/libgcc/config/arm/bpabi.S b/libgcc/config/arm/bpabi.S index 3f9ece5..c044167 100644 --- a/libgcc/config/arm/bpabi.S +++ b/libgcc/config/arm/bpabi.S @@ -175,10 +175,49 @@ ARM_FUNC_START aeabi_ldivmod 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 */