From: Paolo Bonzini <pbonzini@redhat.com>
To: Janne Grunau <j@jannau.net>, qemu-devel@nongnu.org
Cc: Eduardo Habkost <ehabkost@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 1/1] target/i386: fix phadd* with identical destination and source register
Date: Thu, 21 May 2020 18:04:54 +0200 [thread overview]
Message-ID: <aa08c8d6-c243-c0db-42c8-72bc6c69ef10@redhat.com> (raw)
In-Reply-To: <20200401225253.30745-1-j@jannau.net>
On 02/04/20 00:52, Janne Grunau wrote:
> Detected by asm test suite failures in dav1d
> (https://code.videolan.org/videolan/dav1d). Can be reproduced by
> `qemu-x86_64 -cpu core2duo ./tests/checkasm --test=mc_8bpc 1659890620`.
>
> Signed-off-by: Janne Grunau <j@jannau.net>
> ---
> target/i386/ops_sse.h | 53 +++++++++++++++++++++++++++----------------
> 1 file changed, 33 insertions(+), 20 deletions(-)
>
> diff --git a/target/i386/ops_sse.h b/target/i386/ops_sse.h
> index ec1ec745d0..2f41511aef 100644
> --- a/target/i386/ops_sse.h
> +++ b/target/i386/ops_sse.h
> @@ -1435,34 +1435,47 @@ void glue(helper_pshufb, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
>
> void glue(helper_phaddw, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
> {
> - d->W(0) = (int16_t)d->W(0) + (int16_t)d->W(1);
> - d->W(1) = (int16_t)d->W(2) + (int16_t)d->W(3);
> - XMM_ONLY(d->W(2) = (int16_t)d->W(4) + (int16_t)d->W(5));
> - XMM_ONLY(d->W(3) = (int16_t)d->W(6) + (int16_t)d->W(7));
> - d->W((2 << SHIFT) + 0) = (int16_t)s->W(0) + (int16_t)s->W(1);
> - d->W((2 << SHIFT) + 1) = (int16_t)s->W(2) + (int16_t)s->W(3);
> - XMM_ONLY(d->W(6) = (int16_t)s->W(4) + (int16_t)s->W(5));
> - XMM_ONLY(d->W(7) = (int16_t)s->W(6) + (int16_t)s->W(7));
> +
> + Reg r;
> +
> + r.W(0) = (int16_t)d->W(0) + (int16_t)d->W(1);
> + r.W(1) = (int16_t)d->W(2) + (int16_t)d->W(3);
> + XMM_ONLY(r.W(2) = (int16_t)d->W(4) + (int16_t)d->W(5));
> + XMM_ONLY(r.W(3) = (int16_t)d->W(6) + (int16_t)d->W(7));
> + r.W((2 << SHIFT) + 0) = (int16_t)s->W(0) + (int16_t)s->W(1);
> + r.W((2 << SHIFT) + 1) = (int16_t)s->W(2) + (int16_t)s->W(3);
> + XMM_ONLY(r.W(6) = (int16_t)s->W(4) + (int16_t)s->W(5));
> + XMM_ONLY(r.W(7) = (int16_t)s->W(6) + (int16_t)s->W(7));
> +
> + *d = r;
> }
>
> void glue(helper_phaddd, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
> {
> - d->L(0) = (int32_t)d->L(0) + (int32_t)d->L(1);
> - XMM_ONLY(d->L(1) = (int32_t)d->L(2) + (int32_t)d->L(3));
> - d->L((1 << SHIFT) + 0) = (int32_t)s->L(0) + (int32_t)s->L(1);
> - XMM_ONLY(d->L(3) = (int32_t)s->L(2) + (int32_t)s->L(3));
> + Reg r;
> +
> + r.L(0) = (int32_t)d->L(0) + (int32_t)d->L(1);
> + XMM_ONLY(r.L(1) = (int32_t)d->L(2) + (int32_t)d->L(3));
> + r.L((1 << SHIFT) + 0) = (int32_t)s->L(0) + (int32_t)s->L(1);
> + XMM_ONLY(r.L(3) = (int32_t)s->L(2) + (int32_t)s->L(3));
> +
> + *d = r;
> }
>
> void glue(helper_phaddsw, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
> {
> - d->W(0) = satsw((int16_t)d->W(0) + (int16_t)d->W(1));
> - d->W(1) = satsw((int16_t)d->W(2) + (int16_t)d->W(3));
> - XMM_ONLY(d->W(2) = satsw((int16_t)d->W(4) + (int16_t)d->W(5)));
> - XMM_ONLY(d->W(3) = satsw((int16_t)d->W(6) + (int16_t)d->W(7)));
> - d->W((2 << SHIFT) + 0) = satsw((int16_t)s->W(0) + (int16_t)s->W(1));
> - d->W((2 << SHIFT) + 1) = satsw((int16_t)s->W(2) + (int16_t)s->W(3));
> - XMM_ONLY(d->W(6) = satsw((int16_t)s->W(4) + (int16_t)s->W(5)));
> - XMM_ONLY(d->W(7) = satsw((int16_t)s->W(6) + (int16_t)s->W(7)));
> + Reg r;
> +
> + r.W(0) = satsw((int16_t)d->W(0) + (int16_t)d->W(1));
> + r.W(1) = satsw((int16_t)d->W(2) + (int16_t)d->W(3));
> + XMM_ONLY(r.W(2) = satsw((int16_t)d->W(4) + (int16_t)d->W(5)));
> + XMM_ONLY(r.W(3) = satsw((int16_t)d->W(6) + (int16_t)d->W(7)));
> + r.W((2 << SHIFT) + 0) = satsw((int16_t)s->W(0) + (int16_t)s->W(1));
> + r.W((2 << SHIFT) + 1) = satsw((int16_t)s->W(2) + (int16_t)s->W(3));
> + XMM_ONLY(r.W(6) = satsw((int16_t)s->W(4) + (int16_t)s->W(5)));
> + XMM_ONLY(r.W(7) = satsw((int16_t)s->W(6) + (int16_t)s->W(7)));
> +
> + *d = r;
> }
>
> void glue(helper_pmaddubsw, SUFFIX)(CPUX86State *env, Reg *d, Reg *s)
>
Queued, thanks.
Paolo
prev parent reply other threads:[~2020-05-21 16:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-01 22:52 [PATCH 1/1] target/i386: fix phadd* with identical destination and source register Janne Grunau
2020-04-02 17:23 ` Richard Henderson
2020-05-21 16:04 ` Paolo Bonzini [this message]
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