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* ppc/altivec.igen (vperm): Latch inputs into temporaries.

This commit is contained in:
Joel Brobecker 2008-05-09 15:03:09 +00:00
parent 55ba0940d9
commit 7010a0c901
2 changed files with 11 additions and 2 deletions
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4
sim/ChangeLog
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@ -1,3 +1,7 @@
2008-05-09 Olivier Hainque <hainque@adacore.com>
* ppc/altivec.igen (vperm): Latch inputs into temporaries.
2008-03-25 M R Swami Reddy <MR.Swami.Reddy@nsc.com>
* MAINTAINERS: Add myself as maintainer of cr16 port.

9
sim/ppc/altivec.igen
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@ -1634,12 +1634,17 @@ unsigned32::model-function::altivec_unsigned_saturate_32:signed64 val, int *sat
0.4,6.VS,11.VA,16.VB,21.VC,26.43:VX:av:vperm %VD, %VA, %VB, %VC:Vector Permute
int i, who;
/* The permutation vector might have us read into the source vectors
back at positions before the iteration index, so we must latch the
sources to prevent early-clobbering in case the destination vector
is the same as one of them. */
vreg myvA = (*vA), myvB = (*vB);
for (i = 0; i < 16; i++) {
who = (*vC).b[AV_BINDEX(i)] & 0x1f;
if (who & 0x10)
(*vS).b[AV_BINDEX(i)] = (*vB).b[AV_BINDEX(who & 0xf)];
(*vS).b[AV_BINDEX(i)] = myvB.b[AV_BINDEX(who & 0xf)];
else
(*vS).b[AV_BINDEX(i)] = (*vA).b[AV_BINDEX(who & 0xf)];
(*vS).b[AV_BINDEX(i)] = myvA.b[AV_BINDEX(who & 0xf)];
}
PPC_INSN_VR(VS_BITMASK, VA_BITMASK | VB_BITMASK | VC_BITMASK);