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target-ppc: Fix xxpermdi When T==A or T==B

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The existing implementation of xxpermdi is defective if the target
VSR is also a source VSR.  This patch fixes the defect in this case
but also preserves the simpler, two TCG operation implementation
when the target is not once of the two sources.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-02-10 11:25:09 -06:00 committed by Alexander Graf
parent 3f34cf910c
commit f5bc1bfa35
1 changed files with 33 additions and 8 deletions
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25
target-ppc/translate.c
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@ -7332,6 +7332,30 @@ static void gen_xxpermdi(DisasContext *ctx)
return;
}
if (unlikely((xT(ctx->opcode) == xA(ctx->opcode)) ||
(xT(ctx->opcode) == xB(ctx->opcode)))) {
TCGv_i64 xh, xl;
xh = tcg_temp_new_i64();
xl = tcg_temp_new_i64();
if ((DM(ctx->opcode) & 2) == 0) {
tcg_gen_mov_i64(xh, cpu_vsrh(xA(ctx->opcode)));
} else {
tcg_gen_mov_i64(xh, cpu_vsrl(xA(ctx->opcode)));
}
if ((DM(ctx->opcode) & 1) == 0) {
tcg_gen_mov_i64(xl, cpu_vsrh(xB(ctx->opcode)));
} else {
tcg_gen_mov_i64(xl, cpu_vsrl(xB(ctx->opcode)));
}
tcg_gen_mov_i64(cpu_vsrh(xT(ctx->opcode)), xh);
tcg_gen_mov_i64(cpu_vsrl(xT(ctx->opcode)), xl);
tcg_temp_free_i64(xh);
tcg_temp_free_i64(xl);
} else {
if ((DM(ctx->opcode) & 2) == 0) {
tcg_gen_mov_i64(cpu_vsrh(xT(ctx->opcode)), cpu_vsrh(xA(ctx->opcode)));
} else {
@ -7343,6 +7367,7 @@ static void gen_xxpermdi(DisasContext *ctx)
tcg_gen_mov_i64(cpu_vsrl(xT(ctx->opcode)), cpu_vsrl(xB(ctx->opcode)));
}
}
}
#define OP_ABS 1
#define OP_NABS 2