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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::22c; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x22c.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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Treat this flag exactly like we treat the other rex bits. The -1 initialization is unused; the two tests are > 0 and =3D=3D 1, so the value can be reduced to a bool. Signed-off-by: Richard Henderson Reviewed-by: Paolo Bonzini Message-Id: <20210514151342.384376-19-richard.henderson@linaro.org> --- target/i386/tcg/translate.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 22175c6628..4222f09b6f 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -95,6 +95,7 @@ typedef struct DisasContext { uint8_t rex_r; uint8_t rex_x; uint8_t rex_b; + bool rex_w; #endif int vex_l; /* vex vector length */ int vex_v; /* vex vvvv register, without 1's complement. */ @@ -167,11 +168,13 @@ typedef struct DisasContext { =20 #ifdef TARGET_X86_64 #define REX_PREFIX(S) (((S)->prefix & PREFIX_REX) !=3D 0) +#define REX_W(S) ((S)->rex_w) #define REX_R(S) ((S)->rex_r + 0) #define REX_X(S) ((S)->rex_x + 0) #define REX_B(S) ((S)->rex_b + 0) #else #define REX_PREFIX(S) false +#define REX_W(S) false #define REX_R(S) 0 #define REX_X(S) 0 #define REX_B(S) 0 @@ -4552,12 +4555,12 @@ static target_ulong disas_insn(DisasContext *s, CPU= State *cpu) MemOp ot, aflag, dflag; int modrm, reg, rm, mod, op, opreg, val; target_ulong next_eip, tval; - int rex_w; target_ulong pc_start =3D s->base.pc_next; =20 s->pc_start =3D s->pc =3D pc_start; s->override =3D -1; #ifdef TARGET_X86_64 + s->rex_w =3D false; s->rex_r =3D 0; s->rex_x =3D 0; s->rex_b =3D 0; @@ -4571,7 +4574,6 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) } =20 prefixes =3D 0; - rex_w =3D -1; =20 next_byte: b =3D x86_ldub_code(env, s); @@ -4615,7 +4617,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) if (CODE64(s)) { /* REX prefix */ prefixes |=3D PREFIX_REX; - rex_w =3D (b >> 3) & 1; + s->rex_w =3D (b >> 3) & 1; s->rex_r =3D (b & 0x4) << 1; s->rex_x =3D (b & 0x2) << 2; s->rex_b =3D (b & 0x1) << 3; @@ -4654,12 +4656,12 @@ static target_ulong disas_insn(DisasContext *s, CPU= State *cpu) b =3D x86_ldub_code(env, s) | 0x100; } else { /* 3-byte VEX prefix: RXBmmmmm wVVVVlpp */ + vex3 =3D x86_ldub_code(env, s); #ifdef TARGET_X86_64 s->rex_x =3D (~vex2 >> 3) & 8; s->rex_b =3D (~vex2 >> 2) & 8; + s->rex_w =3D (vex3 >> 7) & 1; #endif - vex3 =3D x86_ldub_code(env, s); - rex_w =3D (vex3 >> 7) & 1; switch (vex2 & 0x1f) { case 0x01: /* Implied 0f leading opcode bytes. */ b =3D x86_ldub_code(env, s) | 0x100; @@ -4686,7 +4688,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) /* In 64-bit mode, the default data size is 32-bit. Select 64-bit data with rex_w, and 16-bit data with 0x66; rex_w takes precede= nce over 0x66 if both are present. */ - dflag =3D (rex_w > 0 ? MO_64 : prefixes & PREFIX_DATA ? MO_16 : MO= _32); + dflag =3D (REX_W(s) ? MO_64 : prefixes & PREFIX_DATA ? MO_16 : MO_= 32); /* In 64-bit mode, 0x67 selects 32-bit addressing. */ aflag =3D (prefixes & PREFIX_ADR ? MO_32 : MO_64); } else { @@ -5082,7 +5084,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) /* operand size for jumps is 64 bit */ ot =3D MO_64; } else if (op =3D=3D 3 || op =3D=3D 5) { - ot =3D dflag !=3D MO_16 ? MO_32 + (rex_w =3D=3D 1) : MO_16; + ot =3D dflag !=3D MO_16 ? MO_32 + REX_W(s) : MO_16; } else if (op =3D=3D 6) { /* default push size is 64 bit */ ot =3D mo_pushpop(s, dflag); --=20 2.25.1