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commit 4b825ef5dcf064fd0f05323e7edd538ce02ac146
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Author: florian <florian@8f6e269a-dfd6-0310-a8e1-e2731360e62c>
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Date: Wed Feb 17 19:57:01 2016 +0000
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s390: Implement popcnt insn. Part of fixing BZ #359289.
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Patch by Andreas Arnez (arnez@linux.vnet.ibm.com)
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git-svn-id: svn://svn.valgrind.org/vex/trunk@3210 8f6e269a-dfd6-0310-a8e1-e2731360e62c
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diff --git a/VEX/priv/guest_s390_toIR.c b/VEX/priv/guest_s390_toIR.c
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index 116a606..5e6acd4 100644
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--- a/VEX/priv/guest_s390_toIR.c
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+++ b/VEX/priv/guest_s390_toIR.c
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@@ -12938,6 +12938,38 @@ s390_irgen_FLOGR(UChar r1, UChar r2)
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}
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static const HChar *
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+s390_irgen_POPCNT(UChar r1, UChar r2)
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+{
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+ Int i;
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+ IRTemp val = newTemp(Ity_I64);
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+ IRTemp mask[3];
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+
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+ assign(val, get_gpr_dw0(r2));
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+ for (i = 0; i < 3; i++) {
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+ mask[i] = newTemp(Ity_I64);
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+ }
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+ assign(mask[0], mkU64(0x5555555555555555ULL));
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+ assign(mask[1], mkU64(0x3333333333333333ULL));
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+ assign(mask[2], mkU64(0x0F0F0F0F0F0F0F0FULL));
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+ for (i = 0; i < 3; i++) {
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+ IRTemp tmp = newTemp(Ity_I64);
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+
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+ assign(tmp,
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+ binop(Iop_Add64,
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+ binop(Iop_And64,
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+ mkexpr(val),
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+ mkexpr(mask[i])),
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+ binop(Iop_And64,
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+ binop(Iop_Shr64, mkexpr(val), mkU8(1 << i)),
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+ mkexpr(mask[i]))));
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+ val = tmp;
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+ }
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+ s390_cc_thunk_putZ(S390_CC_OP_BITWISE, val);
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+ put_gpr_dw0(r1, mkexpr(val));
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+ return "popcnt";
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+}
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+
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+static const HChar *
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s390_irgen_STCK(IRTemp op2addr)
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{
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IRDirty *d;
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@@ -14999,7 +15031,8 @@ s390_decode_4byte_and_irgen(const UChar *bytes)
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ovl.fmt.RRE.r2); goto ok;
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case 0xb9df: s390_format_RRE_RR(s390_irgen_CLHLR, ovl.fmt.RRE.r1,
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ovl.fmt.RRE.r2); goto ok;
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- case 0xb9e1: /* POPCNT */ goto unimplemented;
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+ case 0xb9e1: s390_format_RRE_RR(s390_irgen_POPCNT, ovl.fmt.RRE.r1,
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+ ovl.fmt.RRE.r2); goto ok;
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case 0xb9e2: s390_format_RRF_U0RR(s390_irgen_LOCGR, ovl.fmt.RRF3.r3,
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ovl.fmt.RRF3.r1, ovl.fmt.RRF3.r2,
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S390_XMNM_LOCGR); goto ok;
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