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([2602:47:d483:7301:a064:e3f9:a812:973b]) by smtp.gmail.com with ESMTPSA id fe22-20020a056a002f1600b00682a0184742sm11619069pfb.148.2023.08.16.07.55.51 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Aug 2023 07:55:51 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 3/3] tcg/i386: Allow immediate as input to deposit_* Date: Wed, 16 Aug 2023 07:55:47 -0700 Message-Id: <20230816145547.477974-4-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230816145547.477974-1-richard.henderson@linaro.org> References: <20230816145547.477974-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::42d; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org We can use MOVB and MOVW with an immediate just as easily as with a register input. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- tcg/i386/tcg-target-con-set.h | 2 +- tcg/i386/tcg-target.c.inc | 26 ++++++++++++++++++++++---- 2 files changed, 23 insertions(+), 5 deletions(-) diff --git a/tcg/i386/tcg-target-con-set.h b/tcg/i386/tcg-target-con-set.h index 3949d49538..7d00a7dde8 100644 --- a/tcg/i386/tcg-target-con-set.h +++ b/tcg/i386/tcg-target-con-set.h @@ -33,7 +33,7 @@ C_O1_I1(r, q) C_O1_I1(r, r) C_O1_I1(x, r) C_O1_I1(x, x) -C_O1_I2(q, 0, q) +C_O1_I2(q, 0, qi) C_O1_I2(q, r, re) C_O1_I2(r, 0, ci) C_O1_I2(r, 0, r) diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc index ba40dd0f4d..3045b56002 100644 --- a/tcg/i386/tcg-target.c.inc +++ b/tcg/i386/tcg-target.c.inc @@ -276,6 +276,7 @@ static bool tcg_target_const_match(int64_t val, TCGType type, int ct) #define OPC_MOVL_GvEv (0x8b) /* loads, more or less */ #define OPC_MOVB_EvIz (0xc6) #define OPC_MOVL_EvIz (0xc7) +#define OPC_MOVB_Ib (0xb0) #define OPC_MOVL_Iv (0xb8) #define OPC_MOVBE_GyMy (0xf0 | P_EXT38) #define OPC_MOVBE_MyGy (0xf1 | P_EXT38) @@ -2750,13 +2751,30 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, OP_32_64(deposit): if (args[3] == 0 && args[4] == 8) { /* load bits 0..7 */ - tcg_out_modrm(s, OPC_MOVB_EvGv | P_REXB_R | P_REXB_RM, a2, a0); + if (const_a2) { + tcg_out_opc(s, OPC_MOVB_Ib | P_REXB_RM | LOWREGMASK(a0), + 0, a0, 0); + tcg_out8(s, a2); + } else { + tcg_out_modrm(s, OPC_MOVB_EvGv | P_REXB_R | P_REXB_RM, a2, a0); + } } else if (TCG_TARGET_REG_BITS == 32 && args[3] == 8 && args[4] == 8) { /* load bits 8..15 */ - tcg_out_modrm(s, OPC_MOVB_EvGv, a2, a0 + 4); + if (const_a2) { + tcg_out8(s, OPC_MOVB_Ib + a0 + 4); + tcg_out8(s, a2); + } else { + tcg_out_modrm(s, OPC_MOVB_EvGv, a2, a0 + 4); + } } else if (args[3] == 0 && args[4] == 16) { /* load bits 0..15 */ - tcg_out_modrm(s, OPC_MOVL_EvGv | P_DATA16, a2, a0); + if (const_a2) { + tcg_out_opc(s, OPC_MOVL_Iv | P_DATA16 | LOWREGMASK(a0), + 0, a0, 0); + tcg_out16(s, a2); + } else { + tcg_out_modrm(s, OPC_MOVL_EvGv | P_DATA16, a2, a0); + } } else { g_assert_not_reached(); } @@ -3311,7 +3329,7 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) case INDEX_op_deposit_i32: case INDEX_op_deposit_i64: - return C_O1_I2(q, 0, q); + return C_O1_I2(q, 0, qi); case INDEX_op_setcond_i32: case INDEX_op_setcond_i64: