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//depot/Lab01_N/Base/crts/crtw32/string/ia64/memmove.s#4 - integrate change 31248 (text)
#include "ksia64.h"
LEAF_ENTRY(memmove) .prologue .regstk 3,7,0,8 alloc t17 = ar.pfs,3,31,0,32 .save pr, r64 mov r64 = pr and t3 = -32, a1 ;;
lfetch [t3], 32 //0 .save ar.lc, r65 mov.i r65 = ar.lc and t1 = 7, a1 ;;
.body lfetch [t3], 32 //32 mov v0 = a0 and t0 = 7, a0 ;;
add t21 = a1, a2 cmp.gtu pt0 = a0, a1 or t2 = t0, t1 ;;
(pt0) cmp.ltu.unc pt0 = a0, t21 cmp.eq pt1 = zero, a2 (pt1) br.ret.spnt brp
lfetch [t3], 32 //64 cmp.lt pt2 = 24, a2 (pt0) br.cond.spnt CopyDown ;;
lfetch [t3], 32 //96 cmp.lt pt6 = 127, a2 cmp.le pt4 = 8, a2 ;;
(pt6) lfetch [t3], 32 //128 (pt4) cmp.eq.unc pt3 = 0, t2 (pt4) cmp.eq.unc pt5 = t0, t1
(pt3) br.cond.sptk QwordMoveUp (pt5) br.cond.spnt AlignedMove (pt2) br.cond.sptk UnalignedMove
ByteMoveUpLoop: ld1 t10 = [a1], 1 nop.f 0 add a2 = -1, a2 ;;
st1 [a0] = t10, 1 cmp.ne pt1 = zero, a2 (pt1) br.cond.sptk ByteMoveUpLoop
nop.m 0 nop.f 0 br.ret.sptk brp
UnalignedMove: cmp.eq pt0, pt1 = 0, t1 sub t1 = 8, t1 (pt0) br.cond.spnt SkipUnalignedMoveByteLoop ;;
UnalignedMoveByteLoop: ld1 t10 = [a1], 1 add t1 = -1, t1 add a2 = -1, a2 ;;
st1 [a0] = t10, 1 cmp.eq p0, pt1 = zero, t1 (pt1) br.cond.sptk UnalignedMoveByteLoop ;;
SkipUnalignedMoveByteLoop: (pt2) cmp.eq pt1, pt2 = r0, r0 mov t1 = 8 (pt1) br.cond.dptk UnalignedMoveByteLoop ;;
and t0 = 7, a0 mov pr.rot = 3<<16 or t1 = a1, r0 ;;
add t2 = a2, t0 mov.i ar.ec = 32 sub t21 = 8, t0 ;;
sub t4 = a0, t0 shr t10 = t2, 3 shl t21 = t21, 3 ;;
ld8 r33 = [t4], 0 add t10 = -1,t10 and t2 = 7, t2 ;;
cmp.eq pt0 = 2, t0 cmp.eq pt3 = 4, t0 cmp.eq pt5 = 6, t0 ;;
nop.m 0 shl r33 = r33,t21 // Prime r39 mov.i ar.lc = t10
(pt0) br.cond.spnt SpecialLoop2 (pt3) br.cond.spnt SpecialLoop4 (pt5) br.cond.spnt SpecialLoop6
cmp.eq pt1 = 3, t0 cmp.eq pt4 = 5, t0 cmp.eq pt6 = 7, t0
(pt1) br.cond.spnt SpecialLoop3 (pt4) br.cond.spnt SpecialLoop5 (pt6) br.cond.spnt SpecialLoop7 ;;
SpecialLoop1: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop1, SpecialLoop1E
SpecialLoop1E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,56 br.ctop.sptk.many SpecialLoop1
br UnalignedByteDone
SpecialLoop2: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop2, SpecialLoop2E
SpecialLoop2E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,48 br.ctop.sptk.many SpecialLoop2
br UnalignedByteDone
SpecialLoop3: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop3, SpecialLoop3E
SpecialLoop3E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,40 br.ctop.sptk.many SpecialLoop3
br UnalignedByteDone
SpecialLoop4: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop4, SpecialLoop4E
SpecialLoop4E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,32 br.ctop.sptk.many SpecialLoop4
br UnalignedByteDone
SpecialLoop5: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop5, SpecialLoop5E
SpecialLoop5E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,24 br.ctop.sptk.many SpecialLoop5
br UnalignedByteDone
SpecialLoop6: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop6, SpecialLoop6E
SpecialLoop6E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,16 br.ctop.sptk.many SpecialLoop6
br UnalignedByteDone
SpecialLoop7: (p16) ld8 r32 = [t1], 8 nop.f 0 brp.sptk.imp SpecialLoop7, SpecialLoop7E
SpecialLoop7E: (p48) st8 [t4] = r10, 8 (p47) shrp r10 = r62,r63,8 br.ctop.sptk.many SpecialLoop7;;
UnalignedByteDone: sub t1 = t1, t0 mov pr = r64 mov.i ar.lc = r65 ;;
cmp.eq pt0 = zero, t2 (pt0) br.ret.spnt brp
UnAlignedByteDoneLoop: ld1 t10 = [t1], 1 add t2 = -1, t2 ;;
cmp.ne pt1 = zero, t2
st1 [t4] = t10, 1 (pt1) br.cond.sptk UnAlignedByteDoneLoop br.ret.spnt brp
AlignedMove: add t4 = 64, t3 (pt6) lfetch [t3], 32 //160 sub t22 = 8, t0 ;;
(pt6) lfetch [t3], 64 //192 (pt6) lfetch [t4], 96 //224 sub a2 = a2, t22 ;;
AlignedMoveByteLoop: ld1 t10 = [a1], 1 nop.f 0 add t22 = -1, t22 ;;
st1 [a0] = t10, 1 cmp.ne pt1 = zero, t22 (pt1) br.cond.sptk AlignedMoveByteLoop ;;
(pt6) lfetch [t3], 32 //256 cmp.eq.unc pt0 = zero, a2 cmp.gt pt2 = 8, a2
(pt6) lfetch [t4], 128 //320 (pt0) br.ret.spnt brp (pt2) br.cond.sptk ByteMoveUpLoop ;;
//// both src & dest are now 8-byte aligned//
QwordMoveUp: add t3 = 128, a1 add t4 = 288, a1 add t7 = 8, a1
add t8 = 8, a0 cmp.gt pt3 = 64, a2 (pt3) br.cond.spnt QwordMoveUpLoop ;;
UnrolledQwordMoveUpLoop:
ld8 t10 = [a1], 16 ld8 t11 = [t7], 16 add a2 = -64, a2 ;;
ld8 t12 = [a1], 16 ld8 t13 = [t7], 16 cmp.le pt3 = 128, a2 ;;
ld8 t18 = [a1], 16 ld8 t19 = [t7], 16 cmp.gt pt2 = 8, a2 ;;
ld8 t16 = [a1], 16 ld8 t17 = [t7], 16 ;;
(pt3) lfetch [t3], 64 (pt3) lfetch [t4], 64
st8 [a0] = t10, 16 st8 [t8] = t11, 16 ;;
st8 [a0] = t12, 16 st8 [t8] = t13, 16 ;;
st8 [a0] = t18, 16 st8 [t8] = t19, 16 ;;
st8 [a0] = t16, 16 st8 [t8] = t17, 16 (pt3) br.cond.dptk UnrolledQwordMoveUpLoop
(pt2) br.cond.spnt ByteMoveUp ;;
QwordMoveUpLoop:
ld8 t10 = [a1], 8 add a2 = -8, a2 ;;
cmp.le pt1 = 8, a2
st8 [a0] = t10, 8 (pt1) br.cond.sptk QwordMoveUpLoop ;;
ByteMoveUp: cmp.eq pt0 = zero, a2 (pt0) br.ret.spnt brp ;;
AlignedByteDoneLoop: ld1 t10 = [a1], 1 add a2 = -1, a2 ;;
cmp.ne pt1 = zero, a2
st1 [a0] = t10, 1 (pt1) br.cond.sptk AlignedByteDoneLoop br.ret.spnt brp ;;
CopyDown: cmp.eq pt0 = zero, a2 cmp.ne pt6 = t0, t1(pt0) br.ret.spnt brp // return if length is zero
cmp.gt pt4 = 24, a2 add t20 = a2, a0 add t21 = a2, a1
nop.m 0(pt4) br.cond.sptk ByteMoveDown // less than 24 bytes to copy(pt6) br.cond.spnt UnalignedMoveDown // incompatible alignment ;;
nop.m 0 nop.m 0 and t22 = 0x7, t21 ;;
add t20 = -1, t20 add t21 = -1, t21 sub a2 = a2, t22 ;;
TailMove: cmp.eq pt0, pt1 = zero, t22 ;;
(pt1) ld1 t10 = [t21], -1 (pt1) add t22 = -1, t22 ;;
(pt1) st1 [t20] = t10, -1 (pt1) br.cond.sptk TailMove
Block8Move: nop.m 0 add t20 = -7, t20 add t21 = -7, t21 ;;
Block8MoveLoop: cmp.gt pt5, pt6 = 8, a2 ;;
(pt6) ld8 t10 = [t21], -8(pt6) add a2 = -8, a2 ;;
(pt6) st8 [t20] = t10, -8(pt6) br.cond.sptk Block8MoveLoop
add t20 = 8, t20 // adjust dest add t21 = 8, t21 // adjust source br.cond.sptk ByteMoveDown ;;
UnalignedMoveDown: and t1 = 7, t21 ;;
cmp.eq pt0, pt1 = 0, t1 (pt0) br.cond.spnt SkipUnalignedMoveDownByteLoop ;;
add t20 = -1, t20 add t21 = -1, t21 ;;
UnalignedMoveDownByteLoop: ld1 t10 = [t21], -1 add t1 = -1, t1 add a2 = -1, a2 ;;
st1 [t20] = t10, -1 cmp.eq p0, pt1 = zero, t1 (pt1) br.cond.sptk UnalignedMoveDownByteLoop ;;
add t20 = 1, t20 add t21 = 1, t21 ;;
SkipUnalignedMoveDownByteLoop: (pt2) cmp.eq pt1, pt2 = r0, r0 mov t1 = 8 ;;
(pt1) add t20 = -1, t20 (pt1) add t21 = -1, t21 (pt1) br.cond.dptk UnalignedMoveDownByteLoop ;;
add t21 = -8, t21 ;;
and t0 = 7, t20 mov pr.rot = 3<<16 or t1 = t21, r0 ;;
sub t7 = 8, t0 ;;
add t2 = a2, t7 mov.i ar.ec = 32 ;;
sub t4 = t20, t0 shr t10 = t2, 3 shl t6 = t0, 3 ;;
ld8 r33 = [t4], 0 add t10 = -1,t10 and t2 = 7, t2 ;;
cmp.eq pt0 = 2, t0 cmp.eq pt3 = 4, t0 cmp.eq pt5 = 6, t0 ;;
shr r33 = r33,t6 // Prime r39 mov.i ar.lc = t10
(pt0) br.cond.spnt SpecialLoopDown2 (pt3) br.cond.spnt SpecialLoopDown4 (pt5) br.cond.spnt SpecialLoopDown6
cmp.eq pt1 = 3, t0 cmp.eq pt4 = 5, t0 cmp.eq pt6 = 7, t0
(pt1) br.cond.spnt SpecialLoopDown3 (pt4) br.cond.spnt SpecialLoopDown5 (pt6) br.cond.spnt SpecialLoopDown7 ;;
SpecialLoopDown1: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown1, SpecialLoopDown1E
SpecialLoopDown1E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,56 br.ctop.sptk.many SpecialLoopDown1
br UnalignedByteDownDone
SpecialLoopDown2: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown2, SpecialLoopDown2E
SpecialLoopDown2E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,48 br.ctop.sptk.many SpecialLoopDown2
br UnalignedByteDownDone
SpecialLoopDown3: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown3, SpecialLoopDown3E
SpecialLoopDown3E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,40 br.ctop.sptk.many SpecialLoopDown3
br UnalignedByteDownDone
SpecialLoopDown4: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown4, SpecialLoopDown4E
SpecialLoopDown4E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,32 br.ctop.sptk.many SpecialLoopDown4
br UnalignedByteDownDone
SpecialLoopDown5: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown5, SpecialLoopDown5E
SpecialLoopDown5E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,24 br.ctop.sptk.many SpecialLoopDown5
br UnalignedByteDownDone
SpecialLoopDown6: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown6, SpecialLoopDown6E
SpecialLoopDown6E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,16 br.ctop.sptk.many SpecialLoopDown6
br UnalignedByteDownDone
SpecialLoopDown7: (p16) ld8 r32 = [t1], -8 nop.f 0 brp.sptk.imp SpecialLoopDown7, SpecialLoopDown7E
SpecialLoopDown7E: (p48) st8 [t4] = r10, -8 (p47) shrp r10 = r63,r62,8 br.ctop.sptk.many SpecialLoopDown7;;
UnalignedByteDownDone: add t1 = 7, t1 add t4 = 7, t4 ;;
add t1 = t1, t7 mov pr = r64 mov.i ar.lc = r65 ;;
cmp.eq pt0 = zero, t2 (pt0) br.ret.spnt brp ;;
UnAlignedByteDoneDownLoop: ld1 t10 = [t1], -1 add t2 = -1, t2 ;;
cmp.ne pt1 = zero, t2
st1 [t4] = t10, -1 (pt1) br.cond.sptk UnAlignedByteDoneDownLoop br.ret.spnt brp
ByteMoveDown: nop.m 0 add t20 = -1, t20 // adjust source add t21 = -1, t21 // adjust destination ;;
ByteMoveDownLoop: cmp.ne pt1 = zero, a2 ;;
(pt1) ld1 t10 = [t21], -1 (pt1) add a2 = -1, a2 ;;
(pt1) st1 [t20] = t10, -1 (pt1) br.cond.sptk ByteMoveDownLoop br.ret.spnt brp ;;
LEAF_EXIT(memmove)
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