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X-Received-From: 2a00:1450:400c:c0c::241 Subject: [Qemu-devel] [RISU PATCH v3 08/22] risugen: Initialize sve predicates with random data X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-arm@nongnu.org, richard.henderson@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 From: Richard Henderson Using ptrue makes most of the uses of predicates trivial. Therefore, initialize them to something interesting. Signed-off-by: Richard Henderson Signed-off-by: Alex Benn=C3=A9e --- risugen_arm.pm | 48 ++++++++++++++++++++++++++++++++++-------------- 1 file changed, 34 insertions(+), 14 deletions(-) diff --git a/risugen_arm.pm b/risugen_arm.pm index bb3ee90..83e521d 100644 --- a/risugen_arm.pm +++ b/risugen_arm.pm @@ -174,6 +174,24 @@ sub write_sxt32($$) insn32(0x93407c00 | $rn << 5 | $rd); } =20 +sub write_add_rri($$$) +{ + my ($rd, $rn, $i) =3D @_; + my $sh; + + die "write_add_rri: invalid operation for this arch.\n" if (!$is_aarch= 64); + + if ($i >=3D 0 && $i < 0x1000) { + $sh =3D 0; + } elsif (($i & 0xfff) || $i >=3D 0x1000000) { + die "invalid immediate for this arch,\n"; + } else { + $sh =3D 1; + $i >>=3D 12; + } + insn32(0x91000000 | ($rd << 0) | ($rn << 5) | ($i << 10) | ($sh << 22)= ); +} + sub write_sub_rrr($$$) { my ($rd, $rn, $rm) =3D @_; @@ -477,33 +495,35 @@ sub write_random_aarch64_svedata() # Load SVE registers my $align =3D 16; my $vq =3D 16; # quadwords per vector - my $datalen =3D (32 * $vq * 16) + $align; - - write_pc_adr(0, (3 * 4) + ($align - 1)); # insn 1 - write_align_reg(0, $align); # insn 2 - write_jump_fwd($datalen); # insn 3 + my $veclen =3D 32 * $vq * 16; + my $predlen =3D 16 * $vq * 2; + my $datalen =3D $veclen + $predlen; =20 - # align safety - for (my $i =3D 0; $i < ($align / 4); $i++) { - # align with nops - insn32(0xd503201f); - }; + write_pc_adr(0, 2 * 4); # insn 1 + write_jump_fwd($datalen); # insn 2 =20 for (my $rt =3D 0; $rt <=3D 31; $rt++) { for (my $q =3D 0; $q < $vq; $q++) { write_random_fpreg_var(4); # quad } } - - # Reset all the predicate registers to all true - for (my $p =3D 0; $p < 16; $p++) { - insn32(0x2518e3e0 | $p); + for (my $rt =3D 0; $rt <=3D 15; $rt++) { + for (my $q =3D 0; $q < $vq; $q++) { + insn16(rand(0xffff)); + } } =20 for (my $rt =3D 0; $rt <=3D 31; $rt++) { # ldr z$rt, [x0, #$rt, mul vl] insn32(0x85804000 + $rt + (($rt & 7) << 10) + (($rt & 0x18) << 13)= ); } + + write_add_rri(0, 0, $veclen); + + for (my $rt =3D 0; $rt <=3D 15; $rt++) { + # ldr p$rt, [x0, #$pt, mul vl] + insn32(0x85800000 + $rt + (($rt & 7) << 10) + (($rt & 0x18) << 13)= ); + } } =20 sub write_random_aarch64_regdata($$) --=20 2.17.1