Message ID | 20230503072331.1747057-18-richard.henderson@linaro.org |
---|---|
State | New |
Headers | show
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Wed, 03 May 2023 00:23:47 -0700 (PDT) Received: from stoup.Home ([2a02:c7c:74db:8d00:c01d:9d74:b630:9087]) by smtp.gmail.com with ESMTPSA id b14-20020a05600010ce00b0030627f58325sm9586745wrx.25.2023.05.03.00.23.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 May 2023 00:23:47 -0700 (PDT) From: Richard Henderson <richard.henderson@linaro.org> To: qemu-devel@nongnu.org Cc: ale@rev.ng, philmd@linaro.org, marcel.apfelbaum@gmail.com, wangyanan55@huawei.com, anjo@rev.ng Subject: [PATCH 17/84] tcg/i386: Conditionalize tcg_out_extu_i32_i64 Date: Wed, 3 May 2023 08:22:24 +0100 Message-Id: <20230503072331.1747057-18-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230503072331.1747057-1-richard.henderson@linaro.org> References: <20230503072331.1747057-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::433; envelope-from=richard.henderson@linaro.org; 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Series |
tcg: Build once for system, once for user
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expand
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Richard Henderson <richard.henderson@linaro.org> writes: > Since TCG_TYPE_I32 values are kept zero-extended in registers, via > omission of the REXW bit, we need not extend if the register matches. > This is already relied upon by qemu_{ld,st}. > > Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index 85fdea42b9..f8e7325a8b 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -1323,7 +1323,9 @@ static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg dest, TCGReg src) static void tcg_out_extu_i32_i64(TCGContext *s, TCGReg dest, TCGReg src) { - tcg_out_ext32u(s, dest, src); + if (dest != src) { + tcg_out_ext32u(s, dest, src); + } } static void tcg_out_extrl_i64_i32(TCGContext *s, TCGReg dest, TCGReg src)