48 lines
586 B
ArmAsm
48 lines
586 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* unsigned long __xdiv64_32(unsigned long long n, unsigned long d);
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*/
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#include <linux/linkage.h>
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.text
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ENTRY(__xdiv64_32)
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#ifdef CONFIG_CPU_LITTLE_ENDIAN
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mov r4, r0
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mov r5, r1
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#else
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mov r4, r1
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mov r5, r0
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#endif
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cmp/hs r6, r1
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bf.s 1f
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mov #0, r2
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mov r1, r2
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mov #0, r3
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div0u
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.rept 32
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rotcl r2
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div1 r6, r3
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.endr
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rotcl r2
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mul.l r6, r2
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sts macl, r3
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sub r3, r1
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1:
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div0u
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.rept 32
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rotcl r0
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div1 r6, r1
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.endr
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#ifdef CONFIG_CPU_LITTLE_ENDIAN
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mov r2, r1
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rts
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rotcl r0
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#else
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rotcl r0
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mov r0, r1
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rts
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mov r2, r0
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#endif
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