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Mon, 29 Apr 2024 05:13:34 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0032820043; Mon, 29 Apr 2024 05:13:31 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E0C4F20040; Mon, 29 Apr 2024 05:13:29 +0000 (GMT) Received: from localhost.localdomain.com (unknown [9.171.12.153]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 29 Apr 2024 05:13:29 +0000 (GMT) From: Chinmay Rath To: qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, npiggin@gmail.com, danielhb413@gmail.com, richard.henderson@linaro.org, harshpb@linux.ibm.com Subject: [PATCH 1/3] target/ppc: Move VMX storage access instructions to decodetree Date: Mon, 29 Apr 2024 10:43:15 +0530 Message-Id: <20240429051317.289426-2-rathc@linux.ibm.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20240429051317.289426-1-rathc@linux.ibm.com> References: <20240429051317.289426-1-rathc@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: Eqi0Ks6ohcBZlx2Ly-jIuq7ahAh2ggjF X-Proofpoint-ORIG-GUID: y5oubBLAaGfrTm8HJ0IhfeSqaw3u00S_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-04-29_02,2024-04-26_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 mlxlogscore=999 bulkscore=0 suspectscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 malwarescore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2404010000 definitions=main-2404290033 Received-SPF: pass client-ip=148.163.156.1; envelope-from=rathc@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-ppc@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-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-ppc-bounces+incoming=patchwork.ozlabs.org@nongnu.org Moving the following instructions to decodetree specification : {l,st}ve{b,h,w}x, {l,st}v{x,xl}, lvs{l,r} : X-form The changes were verified by validating that the tcg ops generated by those instructions remain the same, which were captured using the '-d in_asm,op' flag. Signed-off-by: Chinmay Rath Reviewed-by: Richard Henderson --- target/ppc/helper.h | 12 +- target/ppc/insn32.decode | 17 +++ target/ppc/mem_helper.c | 12 +- target/ppc/translate.c | 2 - target/ppc/translate/vmx-impl.c.inc | 221 ++++++++++++---------------- target/ppc/translate/vmx-ops.c.inc | 19 --- 6 files changed, 120 insertions(+), 163 deletions(-) diff --git a/target/ppc/helper.h b/target/ppc/helper.h index 86f97ee1e7..f397ef459a 100644 --- a/target/ppc/helper.h +++ b/target/ppc/helper.h @@ -267,12 +267,12 @@ DEF_HELPER_5(VMSUMSHS, void, env, avr, avr, avr, avr) DEF_HELPER_FLAGS_5(VMLADDUHM, TCG_CALL_NO_RWG, void, avr, avr, avr, avr, i32) DEF_HELPER_FLAGS_2(mtvscr, TCG_CALL_NO_RWG, void, env, i32) DEF_HELPER_FLAGS_1(mfvscr, TCG_CALL_NO_RWG, i32, env) -DEF_HELPER_3(lvebx, void, env, avr, tl) -DEF_HELPER_3(lvehx, void, env, avr, tl) -DEF_HELPER_3(lvewx, void, env, avr, tl) -DEF_HELPER_3(stvebx, void, env, avr, tl) -DEF_HELPER_3(stvehx, void, env, avr, tl) -DEF_HELPER_3(stvewx, void, env, avr, tl) +DEF_HELPER_3(LVEBX, void, env, avr, tl) +DEF_HELPER_3(LVEHX, void, env, avr, tl) +DEF_HELPER_3(LVEWX, void, env, avr, tl) +DEF_HELPER_3(STVEBX, void, env, avr, tl) +DEF_HELPER_3(STVEHX, void, env, avr, tl) +DEF_HELPER_3(STVEWX, void, env, avr, tl) #if defined(TARGET_PPC64) DEF_HELPER_4(lxvl, void, env, tl, vsr, tl) DEF_HELPER_4(lxvll, void, env, tl, vsr, tl) diff --git a/target/ppc/insn32.decode b/target/ppc/insn32.decode index eada59f59f..27655f0d9e 100644 --- a/target/ppc/insn32.decode +++ b/target/ppc/insn32.decode @@ -526,6 +526,23 @@ DSCRIQ 111111 ..... ..... ...... 001100010 . @Z22_tap_sh_rc VPMSUMD 000100 ..... ..... ..... 10011001000 @VX +## Vector Load/Store Instructions + +LVEBX 011111 ..... ..... ..... 0000000111 - @X +LVEHX 011111 ..... ..... ..... 0000100111 - @X +LVEWX 011111 ..... ..... ..... 0001000111 - @X +LVX 011111 ..... ..... ..... 0001100111 - @X +LVXL 011111 ..... ..... ..... 0101100111 - @X + +STVEBX 011111 ..... ..... ..... 0010000111 - @X +STVEHX 011111 ..... ..... ..... 0010100111 - @X +STVEWX 011111 ..... ..... ..... 0011000111 - @X +STVX 011111 ..... ..... ..... 0011100111 - @X +STVXL 011111 ..... ..... ..... 0111100111 - @X + +LVSL 011111 ..... ..... ..... 0000000110 - @X +LVSR 011111 ..... ..... ..... 0000100110 - @X + ## Vector Integer Instructions VCMPEQUB 000100 ..... ..... ..... . 0000000110 @VC diff --git a/target/ppc/mem_helper.c b/target/ppc/mem_helper.c index ea7e8443a8..f88155ad45 100644 --- a/target/ppc/mem_helper.c +++ b/target/ppc/mem_helper.c @@ -404,9 +404,9 @@ target_ulong helper_lscbx(CPUPPCState *env, target_ulong addr, uint32_t reg, } \ } #define I(x) (x) -LVE(lvebx, cpu_ldub_data_ra, I, u8) -LVE(lvehx, cpu_lduw_data_ra, bswap16, u16) -LVE(lvewx, cpu_ldl_data_ra, bswap32, u32) +LVE(LVEBX, cpu_ldub_data_ra, I, u8) +LVE(LVEHX, cpu_lduw_data_ra, bswap16, u16) +LVE(LVEWX, cpu_ldl_data_ra, bswap32, u32) #undef I #undef LVE @@ -432,9 +432,9 @@ LVE(lvewx, cpu_ldl_data_ra, bswap32, u32) } \ } #define I(x) (x) -STVE(stvebx, cpu_stb_data_ra, I, u8) -STVE(stvehx, cpu_stw_data_ra, bswap16, u16) -STVE(stvewx, cpu_stl_data_ra, bswap32, u32) +STVE(STVEBX, cpu_stb_data_ra, I, u8) +STVE(STVEHX, cpu_stw_data_ra, bswap16, u16) +STVE(STVEWX, cpu_stl_data_ra, bswap32, u32) #undef I #undef LVE diff --git a/target/ppc/translate.c b/target/ppc/translate.c index 93ffec787c..cde3b88b98 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -6640,8 +6640,6 @@ GEN_HANDLER2_E(icbt_440, "icbt", 0x1F, 0x16, 0x00, 0x03E00001, PPC_BOOKE, PPC2_BOOKE206), GEN_HANDLER2(icbt_440, "icbt", 0x1F, 0x06, 0x08, 0x03E00001, PPC_440_SPEC), -GEN_HANDLER(lvsl, 0x1f, 0x06, 0x00, 0x00000001, PPC_ALTIVEC), -GEN_HANDLER(lvsr, 0x1f, 0x06, 0x01, 0x00000001, PPC_ALTIVEC), GEN_HANDLER(mfvscr, 0x04, 0x2, 0x18, 0x001ff800, PPC_ALTIVEC), GEN_HANDLER(mtvscr, 0x04, 0x2, 0x19, 0x03ff0000, PPC_ALTIVEC), #if defined(TARGET_PPC64) diff --git a/target/ppc/translate/vmx-impl.c.inc b/target/ppc/translate/vmx-impl.c.inc index b56e615c24..4d5e743cfe 100644 --- a/target/ppc/translate/vmx-impl.c.inc +++ b/target/ppc/translate/vmx-impl.c.inc @@ -14,125 +14,88 @@ static inline TCGv_ptr gen_avr_ptr(int reg) return r; } -#define GEN_VR_LDX(name, opc2, opc3) \ -static void glue(gen_, name)(DisasContext *ctx) \ -{ \ - TCGv EA; \ - TCGv_i64 avr; \ - if (unlikely(!ctx->altivec_enabled)) { \ - gen_exception(ctx, POWERPC_EXCP_VPU); \ - return; \ - } \ - gen_set_access_type(ctx, ACCESS_INT); \ - avr = tcg_temp_new_i64(); \ - EA = tcg_temp_new(); \ - gen_addr_reg_index(ctx, EA); \ - tcg_gen_andi_tl(EA, EA, ~0xf); \ - /* \ - * We only need to swap high and low halves. gen_qemu_ld64_i64 \ - * does necessary 64-bit byteswap already. \ - */ \ - if (ctx->le_mode) { \ - gen_qemu_ld64_i64(ctx, avr, EA); \ - set_avr64(rD(ctx->opcode), avr, false); \ - tcg_gen_addi_tl(EA, EA, 8); \ - gen_qemu_ld64_i64(ctx, avr, EA); \ - set_avr64(rD(ctx->opcode), avr, true); \ - } else { \ - gen_qemu_ld64_i64(ctx, avr, EA); \ - set_avr64(rD(ctx->opcode), avr, true); \ - tcg_gen_addi_tl(EA, EA, 8); \ - gen_qemu_ld64_i64(ctx, avr, EA); \ - set_avr64(rD(ctx->opcode), avr, false); \ - } \ -} - -#define GEN_VR_STX(name, opc2, opc3) \ -static void gen_st##name(DisasContext *ctx) \ -{ \ - TCGv EA; \ - TCGv_i64 avr; \ - if (unlikely(!ctx->altivec_enabled)) { \ - gen_exception(ctx, POWERPC_EXCP_VPU); \ - return; \ - } \ - gen_set_access_type(ctx, ACCESS_INT); \ - avr = tcg_temp_new_i64(); \ - EA = tcg_temp_new(); \ - gen_addr_reg_index(ctx, EA); \ - tcg_gen_andi_tl(EA, EA, ~0xf); \ - /* \ - * We only need to swap high and low halves. gen_qemu_st64_i64 \ - * does necessary 64-bit byteswap already. \ - */ \ - if (ctx->le_mode) { \ - get_avr64(avr, rD(ctx->opcode), false); \ - gen_qemu_st64_i64(ctx, avr, EA); \ - tcg_gen_addi_tl(EA, EA, 8); \ - get_avr64(avr, rD(ctx->opcode), true); \ - gen_qemu_st64_i64(ctx, avr, EA); \ - } else { \ - get_avr64(avr, rD(ctx->opcode), true); \ - gen_qemu_st64_i64(ctx, avr, EA); \ - tcg_gen_addi_tl(EA, EA, 8); \ - get_avr64(avr, rD(ctx->opcode), false); \ - gen_qemu_st64_i64(ctx, avr, EA); \ - } \ -} - -#define GEN_VR_LVE(name, opc2, opc3, size) \ -static void gen_lve##name(DisasContext *ctx) \ - { \ - TCGv EA; \ - TCGv_ptr rs; \ - if (unlikely(!ctx->altivec_enabled)) { \ - gen_exception(ctx, POWERPC_EXCP_VPU); \ - return; \ - } \ - gen_set_access_type(ctx, ACCESS_INT); \ - EA = tcg_temp_new(); \ - gen_addr_reg_index(ctx, EA); \ - if (size > 1) { \ - tcg_gen_andi_tl(EA, EA, ~(size - 1)); \ - } \ - rs = gen_avr_ptr(rS(ctx->opcode)); \ - gen_helper_lve##name(tcg_env, rs, EA); \ - } - -#define GEN_VR_STVE(name, opc2, opc3, size) \ -static void gen_stve##name(DisasContext *ctx) \ - { \ - TCGv EA; \ - TCGv_ptr rs; \ - if (unlikely(!ctx->altivec_enabled)) { \ - gen_exception(ctx, POWERPC_EXCP_VPU); \ - return; \ - } \ - gen_set_access_type(ctx, ACCESS_INT); \ - EA = tcg_temp_new(); \ - gen_addr_reg_index(ctx, EA); \ - if (size > 1) { \ - tcg_gen_andi_tl(EA, EA, ~(size - 1)); \ - } \ - rs = gen_avr_ptr(rS(ctx->opcode)); \ - gen_helper_stve##name(tcg_env, rs, EA); \ - } +static bool trans_LVX(DisasContext *ctx, arg_X *a) +{ + TCGv EA; + TCGv_i64 avr; + REQUIRE_INSNS_FLAGS(ctx, ALTIVEC); + REQUIRE_VECTOR(ctx); + gen_set_access_type(ctx, ACCESS_INT); + avr = tcg_temp_new_i64(); + EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]); + tcg_gen_andi_tl(EA, EA, ~0xf); + /* + * We only need to swap high and low halves. gen_qemu_ld64_i64 + * does necessary 64-bit byteswap already. + */ + gen_qemu_ld64_i64(ctx, avr, EA); + set_avr64(a->rt, avr, !ctx->le_mode); + tcg_gen_addi_tl(EA, EA, 8); + gen_qemu_ld64_i64(ctx, avr, EA); + set_avr64(a->rt, avr, ctx->le_mode); + return true; +} -GEN_VR_LDX(lvx, 0x07, 0x03); /* As we don't emulate the cache, lvxl is strictly equivalent to lvx */ -GEN_VR_LDX(lvxl, 0x07, 0x0B); +QEMU_FLATTEN +static bool trans_LVXL(DisasContext *ctx, arg_LVXL *a) +{ + return trans_LVX(ctx, a); +} -GEN_VR_LVE(bx, 0x07, 0x00, 1); -GEN_VR_LVE(hx, 0x07, 0x01, 2); -GEN_VR_LVE(wx, 0x07, 0x02, 4); +static bool trans_STVX(DisasContext *ctx, arg_STVX *a) +{ + TCGv EA; + TCGv_i64 avr; + REQUIRE_INSNS_FLAGS(ctx, ALTIVEC); + REQUIRE_VECTOR(ctx); + gen_set_access_type(ctx, ACCESS_INT); + avr = tcg_temp_new_i64(); + EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]); + tcg_gen_andi_tl(EA, EA, ~0xf); + /* + * We only need to swap high and low halves. gen_qemu_st64_i64 + * does necessary 64-bit byteswap already. + */ + get_avr64(avr, a->rt, !ctx->le_mode); + gen_qemu_st64_i64(ctx, avr, EA); + tcg_gen_addi_tl(EA, EA, 8); + get_avr64(avr, a->rt, ctx->le_mode); + gen_qemu_st64_i64(ctx, avr, EA); + return true; +} -GEN_VR_STX(svx, 0x07, 0x07); /* As we don't emulate the cache, stvxl is strictly equivalent to stvx */ -GEN_VR_STX(svxl, 0x07, 0x0F); +QEMU_FLATTEN +static bool trans_STVXL(DisasContext *ctx, arg_STVXL *a) +{ + return trans_STVX(ctx, a); +} + +static bool do_ldst_ve_X(DisasContext *ctx, arg_X *a, int size, + void (*helper)(TCGv_env, TCGv_ptr, TCGv)) +{ + TCGv EA; + TCGv_ptr vrt; + REQUIRE_INSNS_FLAGS(ctx, ALTIVEC); + REQUIRE_VECTOR(ctx); + gen_set_access_type(ctx, ACCESS_INT); + EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]); + if (size > 1) { + tcg_gen_andi_tl(EA, EA, ~(size - 1)); + } + vrt = gen_avr_ptr(a->rt); + helper(tcg_env, vrt, EA); + return true; +} + +TRANS(LVEBX, do_ldst_ve_X, 1, gen_helper_LVEBX); +TRANS(LVEHX, do_ldst_ve_X, 2, gen_helper_LVEHX); +TRANS(LVEWX, do_ldst_ve_X, 4, gen_helper_LVEWX); -GEN_VR_STVE(bx, 0x07, 0x04, 1); -GEN_VR_STVE(hx, 0x07, 0x05, 2); -GEN_VR_STVE(wx, 0x07, 0x06, 4); +TRANS(STVEBX, do_ldst_ve_X, 1, gen_helper_STVEBX); +TRANS(STVEHX, do_ldst_ve_X, 2, gen_helper_STVEHX); +TRANS(STVEWX, do_ldst_ve_X, 4, gen_helper_STVEWX); static void gen_mfvscr(DisasContext *ctx) { @@ -460,15 +423,17 @@ static void trans_vmrgow(DisasContext *ctx) * Let X be the 32-byte value 0x00 || 0x01 || 0x02 || ... || 0x1E || 0x1F. * Bytes sh:sh+15 of X are placed into vD. */ -static void trans_lvsl(DisasContext *ctx) +static bool trans_LVSL(DisasContext *ctx, arg_LVSL *a) { - int VT = rD(ctx->opcode); TCGv_i64 result = tcg_temp_new_i64(); TCGv_i64 sh = tcg_temp_new_i64(); TCGv EA = tcg_temp_new(); + REQUIRE_INSNS_FLAGS(ctx, ALTIVEC); + REQUIRE_VECTOR(ctx); + /* Get sh(from description) by anding EA with 0xf. */ - gen_addr_reg_index(ctx, EA); + EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]); tcg_gen_extu_tl_i64(sh, EA); tcg_gen_andi_i64(sh, sh, 0xfULL); @@ -478,13 +443,14 @@ static void trans_lvsl(DisasContext *ctx) */ tcg_gen_muli_i64(sh, sh, 0x0101010101010101ULL); tcg_gen_addi_i64(result, sh, 0x0001020304050607ull); - set_avr64(VT, result, true); + set_avr64(a->rt, result, true); /* * Create bytes sh+8:sh+15 of X(from description) and place them in * lower doubleword of vD. */ tcg_gen_addi_i64(result, sh, 0x08090a0b0c0d0e0fULL); - set_avr64(VT, result, false); + set_avr64(a->rt, result, false); + return true; } /* @@ -494,16 +460,17 @@ static void trans_lvsl(DisasContext *ctx) * Let X be the 32-byte value 0x00 || 0x01 || 0x02 || ... || 0x1E || 0x1F. * Bytes (16-sh):(31-sh) of X are placed into vD. */ -static void trans_lvsr(DisasContext *ctx) +static bool trans_LVSR(DisasContext *ctx, arg_LVSR *a) { - int VT = rD(ctx->opcode); TCGv_i64 result = tcg_temp_new_i64(); TCGv_i64 sh = tcg_temp_new_i64(); TCGv EA = tcg_temp_new(); + REQUIRE_INSNS_FLAGS(ctx, ALTIVEC); + REQUIRE_VECTOR(ctx); /* Get sh(from description) by anding EA with 0xf. */ - gen_addr_reg_index(ctx, EA); + EA = do_ea_calc(ctx, a->ra, cpu_gpr[a->rb]); tcg_gen_extu_tl_i64(sh, EA); tcg_gen_andi_i64(sh, sh, 0xfULL); @@ -513,13 +480,14 @@ static void trans_lvsr(DisasContext *ctx) */ tcg_gen_muli_i64(sh, sh, 0x0101010101010101ULL); tcg_gen_subfi_i64(result, 0x1011121314151617ULL, sh); - set_avr64(VT, result, true); + set_avr64(a->rt, result, true); /* * Create bytes (24-sh):(32-sh) of X(from description) and place them in * lower doubleword of vD. */ tcg_gen_subfi_i64(result, 0x18191a1b1c1d1e1fULL, sh); - set_avr64(VT, result, false); + set_avr64(a->rt, result, false); + return true; } /* @@ -1158,8 +1126,6 @@ GEN_VXFORM_TRANS_DUAL(vmrgow, PPC_NONE, PPC2_ALTIVEC_207, GEN_VXFORM_HETRO(vextubrx, 6, 28) GEN_VXFORM_HETRO(vextuhrx, 6, 29) GEN_VXFORM_HETRO(vextuwrx, 6, 30) -GEN_VXFORM_TRANS(lvsl, 6, 31) -GEN_VXFORM_TRANS(lvsr, 6, 32) GEN_VXFORM_TRANS_DUAL(vmrgew, PPC_NONE, PPC2_ALTIVEC_207, vextuwrx, PPC_NONE, PPC2_ISA300) @@ -3365,11 +3331,6 @@ TRANS_FLAGS2(ISA310, VMODUQ, do_vx_helper, gen_helper_VMODUQ) #undef DIVS64 #undef DIVU64 -#undef GEN_VR_LDX -#undef GEN_VR_STX -#undef GEN_VR_LVE -#undef GEN_VR_STVE - #undef GEN_VX_LOGICAL #undef GEN_VX_LOGICAL_207 #undef GEN_VXFORM diff --git a/target/ppc/translate/vmx-ops.c.inc b/target/ppc/translate/vmx-ops.c.inc index 33fec8aca4..672fba3796 100644 --- a/target/ppc/translate/vmx-ops.c.inc +++ b/target/ppc/translate/vmx-ops.c.inc @@ -1,22 +1,3 @@ -#define GEN_VR_LDX(name, opc2, opc3) \ -GEN_HANDLER(name, 0x1F, opc2, opc3, 0x00000001, PPC_ALTIVEC) -#define GEN_VR_STX(name, opc2, opc3) \ -GEN_HANDLER(st##name, 0x1F, opc2, opc3, 0x00000001, PPC_ALTIVEC) -#define GEN_VR_LVE(name, opc2, opc3) \ - GEN_HANDLER(lve##name, 0x1F, opc2, opc3, 0x00000001, PPC_ALTIVEC) -#define GEN_VR_STVE(name, opc2, opc3) \ - GEN_HANDLER(stve##name, 0x1F, opc2, opc3, 0x00000001, PPC_ALTIVEC) -GEN_VR_LDX(lvx, 0x07, 0x03), -GEN_VR_LDX(lvxl, 0x07, 0x0B), -GEN_VR_LVE(bx, 0x07, 0x00), -GEN_VR_LVE(hx, 0x07, 0x01), -GEN_VR_LVE(wx, 0x07, 0x02), -GEN_VR_STX(svx, 0x07, 0x07), -GEN_VR_STX(svxl, 0x07, 0x0F), -GEN_VR_STVE(bx, 0x07, 0x04), -GEN_VR_STVE(hx, 0x07, 0x05), -GEN_VR_STVE(wx, 0x07, 0x06), - #define GEN_VX_LOGICAL(name, tcg_op, opc2, opc3) \ GEN_HANDLER(name, 0x04, opc2, opc3, 0x00000000, PPC_ALTIVEC)