From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: "Aleksandar Rikalo" <aleksandar.rikalo@syrmia.com>,
kvm@vger.kernel.org, "Huacai Chen" <chenhuacai@kernel.org>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Jiaxun Yang" <jiaxun.yang@flygoat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Aurelien Jarno" <aurelien@aurel32.net>
Subject: [PATCH v2 07/24] target/mips: Simplify MSA TCG logic
Date: Tue, 15 Dec 2020 23:57:40 +0100 [thread overview]
Message-ID: <20201215225757.764263-8-f4bug@amsat.org> (raw)
In-Reply-To: <20201215225757.764263-1-f4bug@amsat.org>
Only decode MSA opcodes if MSA is present (implemented).
Now than check_msa_access() will only be called if MSA is
present, the only way to have MIPS_HFLAG_MSA unset is if
MSA is disabled (bit CP0C5_MSAEn cleared, see previous
commit). Therefore we can remove the 'reserved instruction'
exception.
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
target/mips/translate.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
diff --git a/target/mips/translate.c b/target/mips/translate.c
index fc658b3be33..02ea184f9a3 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -28568,13 +28568,8 @@ static inline int check_msa_access(DisasContext *ctx)
}
if (unlikely(!(ctx->hflags & MIPS_HFLAG_MSA))) {
- if (ctx->insn_flags & ASE_MSA) {
- generate_exception_end(ctx, EXCP_MSADIS);
- return 0;
- } else {
- gen_reserved_instruction(ctx);
- return 0;
- }
+ generate_exception_end(ctx, EXCP_MSADIS);
+ return 0;
}
return 1;
}
@@ -30418,7 +30413,7 @@ static void gen_msa_vec(CPUMIPSState *env, DisasContext *ctx)
static void gen_msa(CPUMIPSState *env, DisasContext *ctx)
{
uint32_t opcode = ctx->opcode;
- check_insn(ctx, ASE_MSA);
+
check_msa_access(ctx);
switch (MASK_MSA_MINOR(opcode)) {
@@ -31048,9 +31043,10 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
case OPC_BNZ_H:
case OPC_BNZ_W:
case OPC_BNZ_D:
- check_insn(ctx, ASE_MSA);
- gen_msa_branch(env, ctx, op1);
- break;
+ if (ase_msa_available(env)) {
+ gen_msa_branch(env, ctx, op1);
+ break;
+ }
default:
MIPS_INVAL("cp1");
gen_reserved_instruction(ctx);
@@ -31239,7 +31235,9 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
#endif
} else {
/* MDMX: Not implemented. */
- gen_msa(env, ctx);
+ if (ase_msa_available(env)) {
+ gen_msa(env, ctx);
+ }
}
break;
case OPC_PCREL:
--
2.26.2
next prev parent reply other threads:[~2020-12-15 23:06 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 22:57 [PATCH v2 00/24] target/mips: Convert MSA ASE to decodetree Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 01/24] target/mips/translate: Extract decode_opc_legacy() from decode_opc() Philippe Mathieu-Daudé
2020-12-15 23:23 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 02/24] target/mips/translate: Expose check_mips_64() to 32-bit mode Philippe Mathieu-Daudé
2021-01-06 18:20 ` Philippe Mathieu-Daudé
2021-01-06 18:37 ` Philippe Mathieu-Daudé
2021-01-07 3:56 ` Jiaxun Yang
2020-12-15 22:57 ` [PATCH v2 03/24] target/mips/cpu: Introduce isa_rel6_available() helper Philippe Mathieu-Daudé
2020-12-15 23:27 ` Richard Henderson
2020-12-15 23:48 ` Philippe Mathieu-Daudé
2020-12-16 2:50 ` Jiaxun Yang
2020-12-16 3:14 ` Jiaxun Yang
2020-12-16 10:50 ` Philippe Mathieu-Daudé
2020-12-16 10:59 ` Philippe Mathieu-Daudé
2020-12-16 11:30 ` Jiaxun Yang
2020-12-16 11:36 ` Jiaxun Yang
2021-01-07 9:04 ` Philippe Mathieu-Daudé
2021-01-07 13:17 ` Philippe Mathieu-Daudé
2020-12-16 10:55 ` Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 04/24] target/mips: Introduce ase_msa_available() helper Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 05/24] target/mips: Simplify msa_reset() Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 06/24] target/mips: Use CP0_Config3 to set MIPS_HFLAG_MSA Philippe Mathieu-Daudé
2020-12-15 22:57 ` Philippe Mathieu-Daudé [this message]
2020-12-15 22:57 ` [PATCH v2 08/24] target/mips: Remove now unused ASE_MSA definition Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 09/24] target/mips: Alias MSA vector registers on FPU scalar registers Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 10/24] target/mips: Extract msa_translate_init() from mips_tcg_init() Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 11/24] target/mips: Remove CPUMIPSState* argument from gen_msa*() methods Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 12/24] target/mips: Explode gen_msa_branch() as gen_msa_BxZ_V/BxZ() Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 13/24] target/mips: Rename msa_helper.c as mod-msa_helper.c Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 14/24] target/mips: Move msa_reset() to mod-msa_helper.c Philippe Mathieu-Daudé
2020-12-15 23:09 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 15/24] target/mips: Extract MSA helpers from op_helper.c Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 16/24] target/mips: Extract MSA helper definitions Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 17/24] target/mips: Declare gen_msa/_branch() in 'translate.h' Philippe Mathieu-Daudé
2020-12-15 23:10 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 18/24] target/mips: Extract MSA translation routines Philippe Mathieu-Daudé
2020-12-15 22:57 ` [PATCH v2 19/24] target/mips: Introduce decode tree bindings for MSA opcodes Philippe Mathieu-Daudé
2020-12-15 23:11 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 20/24] target/mips: Use decode_ase_msa() generated from decodetree Philippe Mathieu-Daudé
2020-12-15 23:15 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 21/24] target/mips: Extract LSA/DLSA translation generators Philippe Mathieu-Daudé
2020-12-15 23:17 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 22/24] target/mips: Introduce decodetree helpers for MSA LSA/DLSA opcodes Philippe Mathieu-Daudé
2020-12-15 23:19 ` Richard Henderson
2020-12-15 22:57 ` [PATCH v2 23/24] target/mips: Introduce decodetree helpers for Release6 " Philippe Mathieu-Daudé
2020-12-15 23:21 ` Richard Henderson
2020-12-15 22:57 ` [RFC PATCH v2 24/24] target/mips/mod-msa: Pass TCGCond argument to gen_check_zero_element() Philippe Mathieu-Daudé
2020-12-15 23:22 ` Richard Henderson
2021-01-07 18:29 ` [PATCH v2 00/24] target/mips: Convert MSA ASE to decodetree Philippe Mathieu-Daudé
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201215225757.764263-8-f4bug@amsat.org \
--to=f4bug@amsat.org \
--cc=aleksandar.rikalo@syrmia.com \
--cc=aurelien@aurel32.net \
--cc=chenhuacai@kernel.org \
--cc=jiaxun.yang@flygoat.com \
--cc=kvm@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=richard.henderson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).