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): Perform division using __udivmoddi4, and fixups for negative operands. From-SVN: r211794
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2014-06-18 Charles Baylis <charles.baylis@linaro.org>
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* config/arm/bpabi.S (__aeabi_ldivmod): Perform division using
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__udivmoddi4, and fixups for negative operands.
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2014-06-18 Charles Baylis <charles.baylis@linaro.org>
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2014-06-18 Charles Baylis <charles.baylis@linaro.org>
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* config/arm/bpabi.S (__aeabi_ldivmod): Optimise stack manipulation.
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* config/arm/bpabi.S (__aeabi_ldivmod): Optimise stack manipulation.
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@ -175,10 +175,49 @@ ARM_FUNC_START aeabi_ldivmod
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test_div_by_zero signed
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test_div_by_zero signed
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push_for_divide __aeabi_ldivmod
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push_for_divide __aeabi_ldivmod
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cmp xxh, #0
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blt 1f
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cmp yyh, #0
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blt 2f
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/* arguments in (r0:r1), (r2:r3) and *sp */
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/* arguments in (r0:r1), (r2:r3) and *sp */
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bl SYM(__gnu_ldivmod_helper) __PLT__
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bl SYM(__udivmoddi4) __PLT__
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pop_for_divide
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pop_for_divide
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RET
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RET
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1: /* xxh:xxl is negative */
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negs xxl, xxl
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sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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cmp yyh, #0
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blt 3f
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/* arguments in (r0:r1), (r2:r3) and *sp */
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bl SYM(__udivmoddi4) __PLT__
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pop_for_divide
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negs xxl, xxl
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sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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negs yyl, yyl
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sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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RET
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2: /* only yyh:yyl is negative */
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negs yyl, yyl
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sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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/* arguments in (r0:r1), (r2:r3) and *sp */
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bl SYM(__udivmoddi4) __PLT__
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pop_for_divide
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negs xxl, xxl
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sbc xxh, xxh, xxh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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RET
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3: /* both xxh:xxl and yyh:yyl are negative */
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negs yyl, yyl
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sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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/* arguments in (r0:r1), (r2:r3) and *sp */
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bl SYM(__udivmoddi4) __PLT__
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pop_for_divide
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negs yyl, yyl
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sbc yyh, yyh, yyh, lsl #1 /* Thumb-2 has no RSC, so use X - 2X */
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RET
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cfi_end LSYM(Lend_aeabi_ldivmod)
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cfi_end LSYM(Lend_aeabi_ldivmod)
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#endif /* L_aeabi_ldivmod */
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#endif /* L_aeabi_ldivmod */
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