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From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: f4bug@amsat.org, luis.pires@eldorado.org.br, qemu-ppc@nongnu.org,
	lagarcia@br.ibm.com, bruno.larsen@eldorado.org.br,
	matheus.ferst@eldorado.org.br, david@gibson.dropbear.id.au
Subject: [PATCH v3 26/30] target/ppc: Implement PNOP
Date: Thu, 29 Apr 2021 18:15:39 -0700	[thread overview]
Message-ID: <20210430011543.1017113-27-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210430011543.1017113-1-richard.henderson@linaro.org>

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/ppc/insn32.decode                   |  2 ++
 target/ppc/insn64.decode                   | 11 +++++++++++
 target/ppc/translate/fixedpoint-impl.c.inc |  5 +++++
 3 files changed, 18 insertions(+)

diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode
index 52d9b355d4..2ed25c7e67 100644
--- a/target/ppc/insn32.decode
+++ b/target/ppc/insn32.decode
@@ -17,6 +17,8 @@
 # License along with this library; if not, see <http://www.gnu.org/licenses/>.
 #
 
+&empty
+
 &D              rt ra si
 @D              ...... rt:5 ra:5 si:s16                 &D
 
diff --git a/target/ppc/insn64.decode b/target/ppc/insn64.decode
index f4272df724..5a82ce375e 100644
--- a/target/ppc/insn64.decode
+++ b/target/ppc/insn64.decode
@@ -20,6 +20,8 @@
 # Many all of these instruction names would be prefixed by "P",
 # but we share code with the non-prefixed instruction.
 
+&empty          !extern
+
 # Format MLS:D and 8LS:D
 &PLS_D          rt ra si:int64_t r:bool  !extern
 %pls_si         32:s18 0:16
@@ -31,3 +33,12 @@
 
 ADDI            000001 10 0--.-- ..................     \
                 001110 ..... ..... ................     @PLS_D
+
+### Prefixed No-operation Instruction
+
+# TODO: diagnose the set of patterns that are illegal:
+# branches, rfebb, sync other than isync, or a service processor attention.
+# The Engineering Note allows us to either diagnose these as illegal,
+# or treat them all as no-op.
+NOP             000001 11 0000-- 000000000000000000     \
+                --------------------------------
diff --git a/target/ppc/translate/fixedpoint-impl.c.inc b/target/ppc/translate/fixedpoint-impl.c.inc
index 7af1b3bcf5..96b8c38f60 100644
--- a/target/ppc/translate/fixedpoint-impl.c.inc
+++ b/target/ppc/translate/fixedpoint-impl.c.inc
@@ -55,3 +55,8 @@ static bool trans_ADDIS(DisasContext *ctx, arg_D *a)
     }
     return true;
 }
+
+static bool trans_NOP(DisasContext *ctx, arg_NOP *a)
+{
+    return true;
+}
-- 
2.25.1



  parent reply	other threads:[~2021-04-30  1:33 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-30  1:15 [PATCH v3 00/30] Base for adding PowerPC 64-bit instructions Richard Henderson
2021-04-30  1:15 ` [PATCH v3 01/30] decodetree: Introduce whex and whexC helpers Richard Henderson
2021-04-30 13:01   ` Luis Fernando Fujita Pires
2021-05-03 22:32   ` Philippe Mathieu-Daudé
2021-04-30  1:15 ` [PATCH v3 02/30] decodetree: More use of f-strings Richard Henderson
2021-04-30 13:01   ` Luis Fernando Fujita Pires
2021-05-03 22:33   ` Philippe Mathieu-Daudé
2021-04-30  1:15 ` [PATCH v3 03/30] decodetree: Add support for 64-bit instructions Richard Henderson
2021-04-30 13:03   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 04/30] decodetree: Extend argument set syntax to allow types Richard Henderson
2021-04-30 13:29   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 05/30] target/ppc: Add cia field to DisasContext Richard Henderson
2021-04-30 20:08   ` Bruno Piazera Larsen
2021-04-30 20:35   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 06/30] target/ppc: Split out decode_legacy Richard Henderson
2021-04-30 20:36   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 07/30] target/ppc: Move DISAS_NORETURN setting into gen_exception* Richard Henderson
2021-05-03 12:58   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 08/30] target/ppc: Remove special case for POWERPC_SYSCALL Richard Henderson
2021-05-03 12:59   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 09/30] target/ppc: Remove special case for POWERPC_EXCP_TRAP Richard Henderson
2021-05-03 13:00   ` Luis Fernando Fujita Pires
2021-04-30  1:15 ` [PATCH v3 10/30] target/ppc: Simplify gen_debug_exception Richard Henderson
2021-04-30  1:15 ` [PATCH v3 11/30] target/ppc: Introduce DISAS_{EXIT,CHAIN}{,_UPDATE} Richard Henderson
2021-04-30  1:15 ` [PATCH v3 12/30] target/ppc: Replace POWERPC_EXCP_SYNC with DISAS_EXIT Richard Henderson
2021-04-30  1:15 ` [PATCH v3 13/30] target/ppc: Remove unnecessary gen_io_end calls Richard Henderson
2021-04-30  1:15 ` [PATCH v3 14/30] target/ppc: Introduce gen_icount_io_start Richard Henderson
2021-04-30  1:15 ` [PATCH v3 15/30] target/ppc: Replace POWERPC_EXCP_STOP with DISAS_EXIT_UPDATE Richard Henderson
2021-04-30  1:15 ` [PATCH v3 16/30] target/ppc: Replace POWERPC_EXCP_BRANCH with DISAS_NORETURN Richard Henderson
2021-04-30  1:15 ` [PATCH v3 17/30] target/ppc: Remove DisasContext.exception Richard Henderson
2021-04-30 13:00   ` Matheus K. Ferst
2021-04-30  1:15 ` [PATCH v3 18/30] target/ppc: Move single-step check to ppc_tr_tb_stop Richard Henderson
2021-04-30  1:15 ` [PATCH v3 19/30] target/ppc: Tidy exception vs exit_tb Richard Henderson
2021-04-30  1:15 ` [PATCH v3 20/30] target/ppc: Mark helper_raise_exception* as noreturn Richard Henderson
2021-05-03 22:36   ` Philippe Mathieu-Daudé
2021-04-30  1:15 ` [PATCH v3 21/30] target/ppc: Use translator_loop_temp_check Richard Henderson
2021-04-30  1:15 ` [PATCH v3 22/30] target/ppc: Introduce macros to check isa extensions Richard Henderson
2021-05-03 22:37   ` Philippe Mathieu-Daudé
2021-04-30  1:15 ` [PATCH v3 23/30] target/ppc: Add infrastructure for prefixed insns Richard Henderson
2021-04-30  1:15 ` [PATCH v3 24/30] target/ppc: Move page crossing check to ppc_tr_translate_insn Richard Henderson
2021-04-30  1:26   ` Richard Henderson
2021-04-30  1:15 ` [PATCH v3 25/30] target/ppc: Move ADDI, ADDIS to decodetree, implement PADDI Richard Henderson
2021-04-30 11:23   ` Luis Fernando Fujita Pires
2021-04-30 14:23     ` Richard Henderson
2021-04-30 18:45       ` Luis Fernando Fujita Pires
2021-04-30 19:11         ` Richard Henderson
2021-04-30 20:32           ` Luis Fernando Fujita Pires
2021-04-30 22:29             ` Richard Henderson
2021-04-30 14:05   ` Matheus K. Ferst
2021-04-30 14:31     ` Richard Henderson
2021-04-30 18:02       ` Matheus K. Ferst
2021-04-30 18:43         ` Richard Henderson
2021-04-30 23:29           ` Matheus K. Ferst
2021-04-30  1:15 ` Richard Henderson [this message]
2021-05-03 22:41   ` [PATCH v3 26/30] target/ppc: Implement PNOP Philippe Mathieu-Daudé
2021-04-30  1:15 ` [PATCH v3 27/30] target/ppc: Move D/DS/X-form integer loads to decodetree Richard Henderson
2021-04-30 23:54   ` Matheus K. Ferst
2021-05-01  0:50     ` Richard Henderson
2021-05-03 12:28       ` Matheus K. Ferst
2021-04-30  1:15 ` [PATCH v3 28/30] target/ppc: Implement prefixed integer load instructions Richard Henderson
2021-04-30  1:15 ` [PATCH v3 29/30] target/ppc: Move D/DS/X-form integer stores to decodetree Richard Henderson
2021-04-30  1:15 ` [PATCH v3 30/30] target/ppc: Implement prefixed integer store instructions Richard Henderson
2021-04-30  1:48 ` [PATCH v3 00/30] Base for adding PowerPC 64-bit instructions no-reply

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