61 lines
1.1 KiB
ArmAsm
61 lines
1.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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.global __udivsi3
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.section .text..SHmedia32,"ax"
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.align 2
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/*
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inputs: r4,r5
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clobbered: r18,r19,r20,r21,r22,r25,tr0
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result in r0.
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*/
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__udivsi3:
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addz.l r5,r63,r22
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nsb r22,r0
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shlld r22,r0,r25
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shlri r25,48,r25
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movi 0xffffffffffffbb0c,r20 /* shift count eqiv 76 */
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sub r20,r25,r21
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mmulfx.w r21,r21,r19
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mshflo.w r21,r63,r21
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ptabs r18,tr0
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mmulfx.w r25,r19,r19
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sub r20,r0,r0
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/* bubble */
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msub.w r21,r19,r19
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/*
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* It would be nice for scheduling to do this add to r21 before
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* the msub.w, but we need a different value for r19 to keep
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* errors under control.
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*/
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addi r19,-2,r21
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mulu.l r4,r21,r18
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mmulfx.w r19,r19,r19
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shlli r21,15,r21
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shlrd r18,r0,r18
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mulu.l r18,r22,r20
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mmacnfx.wl r25,r19,r21
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/* bubble */
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sub r4,r20,r25
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mulu.l r25,r21,r19
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addi r0,14,r0
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/* bubble */
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shlrd r19,r0,r19
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mulu.l r19,r22,r20
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add r18,r19,r18
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/* bubble */
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sub.l r25,r20,r25
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mulu.l r25,r21,r19
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addz.l r25,r63,r25
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sub r25,r22,r25
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shlrd r19,r0,r19
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mulu.l r19,r22,r20
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addi r25,1,r25
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add r18,r19,r18
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cmpgt r25,r20,r25
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add.l r18,r25,r0
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blink tr0,r63
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