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From: Paolo Bonzini <pbonzini@redhat.com>
To: qemu-devel@nongnu.org
Cc: Richard Henderson <richard.henderson@linaro.org>
Subject: [PULL 03/46] target/i386: speedup JO/SETO after MUL or IMUL
Date: Sun, 31 Dec 2023 09:44:19 +0100	[thread overview]
Message-ID: <20231231084502.235366-4-pbonzini@redhat.com> (raw)
In-Reply-To: <20231231084502.235366-1-pbonzini@redhat.com>

OF is equal to the carry flag, so use the same CCPrepare.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/tcg/translate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 8fb80011a22..a16eb8d4008 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -1020,6 +1020,9 @@ static CCPrepare gen_prepare_eflags_o(DisasContext *s, TCGv reg)
     case CC_OP_CLR:
     case CC_OP_POPCNT:
         return (CCPrepare) { .cond = TCG_COND_NEVER, .mask = -1 };
+    case CC_OP_MULB ... CC_OP_MULQ:
+        return (CCPrepare) { .cond = TCG_COND_NE,
+                             .reg = cpu_cc_src, .mask = -1 };
     default:
         gen_compute_eflags(s);
         return (CCPrepare) { .cond = TCG_COND_NE, .reg = cpu_cc_src,
-- 
2.43.0



  parent reply	other threads:[~2023-12-31  8:51 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-31  8:44 [PULL 00/46] (mostly) target/i386 and meson changes for 2023-12-31 Paolo Bonzini
2023-12-31  8:44 ` [PULL 01/46] configure: use a native non-cross compiler for linux-user Paolo Bonzini
2023-12-31  8:44 ` [PULL 02/46] target/i386: optimize computation of JL and JLE from flags Paolo Bonzini
2023-12-31  8:44 ` Paolo Bonzini [this message]
2023-12-31  8:44 ` [PULL 04/46] target/i386: remove unnecessary arguments from raise_interrupt Paolo Bonzini
2023-12-31  8:44 ` [PULL 05/46] target/i386: remove unnecessary truncations Paolo Bonzini
2023-12-31  8:44 ` [PULL 06/46] target/i386: clean up cpu_cc_compute_all Paolo Bonzini
2023-12-31  8:44 ` [PULL 07/46] target/i386: document more deviations from the manual Paolo Bonzini
2023-12-31  8:44 ` [PULL 08/46] target/i386: reimplement check for validity of LOCK prefix Paolo Bonzini
2023-12-31  8:44 ` [PULL 09/46] target/i386: avoid trunc and ext for MULX and RORX Paolo Bonzini
2023-12-31  8:44 ` [PULL 10/46] target/i386: rename zext0/zext2 and make them closer to the manual Paolo Bonzini
2023-12-31  8:44 ` [PULL 11/46] target/i386: add X86_SPECIALs for MOVSX and MOVZX Paolo Bonzini
2023-12-31  8:44 ` [PULL 12/46] target/i386: do not decode string source/destination into decode->mem Paolo Bonzini
2023-12-31  8:44 ` [PULL 13/46] target/i386: do not clobber A0 in POP translation Paolo Bonzini
2023-12-31  8:44 ` [PULL 14/46] target/i386: do not clobber T0 on string operations Paolo Bonzini
2023-12-31  8:44 ` [PULL 15/46] target/i386: split eflags computation out of gen_compute_eflags Paolo Bonzini
2023-12-31  8:44 ` [PULL 16/46] target/i386: do not use s->tmp4 for push Paolo Bonzini
2023-12-31  8:44 ` [PULL 17/46] target/i386: do not use s->tmp0 for jumps on ECX ==/!= 0 Paolo Bonzini
2023-12-31  8:44 ` [PULL 18/46] target/i386: prepare for implementation of STOS/SCAS in new decoder Paolo Bonzini
2023-12-31  8:44 ` [PULL 19/46] target/i386: move operand load and writeback out of gen_cmovcc1 Paolo Bonzini
2023-12-31  8:44 ` [PULL 20/46] target/i386: adjust decoding of J operand Paolo Bonzini
2023-12-31  8:44 ` [PULL 21/46] target/i386: introduce flags writeback mechanism Paolo Bonzini
2023-12-31  8:44 ` [PULL 22/46] target/i386: implement CMPccXADD Paolo Bonzini
2023-12-31  8:44 ` [PULL 23/46] target/i386: the sgx_epc_get_section stub is reachable Paolo Bonzini
2023-12-31  8:44 ` [PULL 24/46] esp: check for NULL result from scsi_device_find() Paolo Bonzini
2023-12-31  8:44 ` [PULL 25/46] meson: fix type of "relocatable" option Paolo Bonzini
2023-12-31  8:44 ` [PULL 26/46] meson: remove unused variable Paolo Bonzini
2023-12-31  8:44 ` [PULL 27/46] meson: use version_compare() to compare version Paolo Bonzini
2023-12-31  8:44 ` [PULL 28/46] Makefile: clean qemu-iotests output Paolo Bonzini
2023-12-31  8:44 ` [PULL 29/46] configure: remove unnecessary subshell Paolo Bonzini
2023-12-31  8:44 ` [PULL 30/46] configure: unify again the case arms in probe_target_compiler Paolo Bonzini
2023-12-31  8:44 ` [PULL 31/46] meson: add more sections to main meson.build Paolo Bonzini
2023-12-31  8:44 ` [PULL 32/46] meson: move program checks together Paolo Bonzini
2023-12-31  8:44 ` [PULL 33/46] meson: move option validation together Paolo Bonzini
2023-12-31  8:44 ` [PULL 34/46] meson: move accelerator dependency checks together Paolo Bonzini
2023-12-31  8:44 ` [PULL 35/46] meson: keep subprojects together Paolo Bonzini
2023-12-31  8:44 ` [PULL 36/46] meson: move CFI detection code with other compiler flags Paolo Bonzini
2023-12-31  8:44 ` [PULL 37/46] meson: move config-host.h definitions together Paolo Bonzini
2023-12-31  8:44 ` [PULL 38/46] meson: move subdirs to "Collect sources" section Paolo Bonzini
2023-12-31  8:44 ` [PULL 39/46] meson: always probe u2f and canokey if the option is enabled Paolo Bonzini
2023-12-31  8:44 ` [PULL 40/46] meson: remove OS definitions from config_targetos Paolo Bonzini
2023-12-31  8:44 ` [PULL 41/46] meson: remove CONFIG_POSIX and CONFIG_WIN32 " Paolo Bonzini
2023-12-31  8:44 ` [PULL 42/46] meson: remove config_targetos Paolo Bonzini
2023-12-31  8:44 ` [PULL 43/46] meson: remove CONFIG_ALL Paolo Bonzini
2023-12-31  8:45 ` [PULL 44/46] meson: rename config_all Paolo Bonzini
2023-12-31  8:45 ` [PULL 45/46] configure, meson: rename targetos to host_os Paolo Bonzini
2023-12-31  8:45 ` [PULL 46/46] meson.build: report graphics backends separately Paolo Bonzini
2024-01-05 12:53 ` [PULL 00/46] (mostly) target/i386 and meson changes for 2023-12-31 Peter Maydell

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