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Thu, 09 Apr 2026 08:09:04 -0700 (PDT) Message-ID: <69eeb7f1-b04e-4c61-90ef-a9e841e6758d@suse.com> Date: Thu, 9 Apr 2026 17:09:02 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v4 12/16] x86emul: support AVX10.2 minmax insns From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= , Teddy Astie References: <1e2ff012-b07a-43be-9ba6-290b38d3c97c@suse.com> Content-Language: en-US Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <1e2ff012-b07a-43be-9ba6-290b38d3c97c@suse.com> Content-Transfer-Encoding: quoted-printable X-purgate-ID: tlsNG-4011c0/1775747344-C4E1B0B1-59FCFDF7/0/0 X-purgate-type: clean X-purgate-size: 4819 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1775747370003154100 Content-Type: text/plain; charset="utf-8" While they use new major opcodes, they are still pretty similar to various existing insns. Signed-off-by: Jan Beulich --- SDE: -dmr / -future --- v4: Update to spec version 3. Switch to using fallthrough pseudo- keyword. v3: New. --- a/tools/tests/x86_emulator/evex-disp8.c +++ b/tools/tests/x86_emulator/evex-disp8.c @@ -726,6 +726,11 @@ static const struct test avx10_2_all[] =3D INSN_SFP(comx, 0f, 2f), INSN(comxsh, f3, map5, 2f, el, fp16, el), INSN(dpphps, , 0f38, 52, vl, d, vl), + INSN(minmax, 66, 0f3a, 52, vl, sd, vl), + INSN(minmax, 66, 0f3a, 53, el, sd, el), + INSN(minmaxbf16, f2, 0f3a, 52, vl, bf16, vl), + INSN(minmaxph, , 0f3a, 52, vl, fp16, vl), + INSN(minmaxsh, , 0f3a, 53, el, fp16, el), INSN(mpsadbw, f3, 0f3a, 42, vl, d_nb, vl), INSN(pdpbssd, f2, 0f38, 50, vl, d, vl), INSN(pdpbssds, f2, 0f38, 51, vl, d, vl), --- a/tools/tests/x86_emulator/predicates.c +++ b/tools/tests/x86_emulator/predicates.c @@ -2093,6 +2093,11 @@ static const struct evex { { { 0x44 }, 3, T, R, pfx_66, WIG, Ln }, /* vpclmulqdq */ { { 0x50 }, 3, T, R, pfx_66, Wn, Ln }, /* vrangep{s,d} */ { { 0x51 }, 3, T, R, pfx_66, Wn, LIG }, /* vranges{s,d} */ + { { 0x52 }, 3, T, R, pfx_no, W0, Ln }, /* vminmaxph */ + { { 0x52 }, 3, T, R, pfx_66, Wn, Ln }, /* vminmaxp{s,d} */ + { { 0x52 }, 3, T, R, pfx_f2, W0, Ln }, /* vminmaxbf16 */ + { { 0x53 }, 3, T, R, pfx_no, W0, LIG }, /* vminmaxsh */ + { { 0x53 }, 3, T, R, pfx_66, Wn, LIG }, /* vminmaxs{s,d} */ { { 0x54 }, 3, T, R, pfx_66, Wn, Ln }, /* vfixupimmp{s,d} */ { { 0x55 }, 3, T, R, pfx_66, Wn, LIG }, /* vfixumpimms{s,d} */ { { 0x56 }, 3, T, R, pfx_no, W0, Ln }, /* vreduceph */ --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -500,6 +500,8 @@ static const struct ext0f3a_table { [0x4c] =3D { .simd_size =3D simd_packed_int, .four_op =3D 1 }, [0x50] =3D { .simd_size =3D simd_packed_fp, .d8s =3D d8s_vl }, [0x51] =3D { .simd_size =3D simd_scalar_vexw, .d8s =3D d8s_dq }, + [0x52] =3D { .simd_size =3D simd_packed_fp, .d8s =3D d8s_vl }, + [0x53] =3D { .simd_size =3D simd_scalar_vexw, .d8s =3D d8s_dq }, [0x54] =3D { .simd_size =3D simd_packed_fp, .d8s =3D d8s_vl }, [0x55] =3D { .simd_size =3D simd_scalar_vexw, .d8s =3D d8s_dq }, [0x56] =3D { .simd_size =3D simd_packed_fp, .two_op =3D 1, .d8s =3D d8= s_vl }, @@ -1468,6 +1470,7 @@ int x86emul_decode(struct x86_emulate_st case 0x0a: /* vrndscalesh */ case 0x26: /* vfpclassph */ case 0x27: /* vfpclasssh */ + case 0x53: /* vminmaxsh */ case 0x56: /* vgetmantph */ case 0x57: /* vgetmantsh */ case 0x66: /* vreduceph */ @@ -1476,6 +1479,11 @@ int x86emul_decode(struct x86_emulate_st s->fp16 =3D true; break; =20 + case 0x52: /* vminmax{ph,bf16} */ + if ( !s->evex.pfx || s->evex.pfx =3D=3D vex_f2 ) + s->fp16 =3D true; + break; + case 0xc2: /* vpcmp{p,s}h */ if ( !(s->evex.pfx & VEX_PREFIX_DOUBLE_MASK) ) s->fp16 =3D true; --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -7697,6 +7697,21 @@ x86_emulate( generate_exception_if(vex.w, X86_EXC_UD); goto simd_0f_int_imm8; =20 + case X86EMUL_OPC_EVEX_F2(0x0f3a, 0x52): /* vminmaxbf16 $imm8,[xyz]mm/m= em,[xyz]mm,[xyz]mm{k} */ + generate_exception_if(ea.type !=3D OP_MEM && evex.brs, X86_EXC_UD); + op_bytes =3D 16 << evex.lr; + fallthrough; + case X86EMUL_OPC_EVEX(0x0f3a, 0x52): /* vminmaxph $imm8,[xyz]mm/mem,[x= yz]mm,[xyz]mm{k} */ + case X86EMUL_OPC_EVEX(0x0f3a, 0x53): /* vminmaxsh $imm,xmm/m16,xmm,xmm= ,xmm{k} */ + generate_exception_if(vex.w, X86_EXC_UD); + fallthrough; + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x52): /* vminmaxp{s,d} $imm8,[xyz]mm= /mem,[xyz]mm,[xyz]mm{k} */ + case X86EMUL_OPC_EVEX_66(0x0f3a, 0x53): /* vminmaxs{s,d} $imm8,xmm/mem= ,xmm,xmm{k} */ + vcpu_must_have(avx10, 2); + if ( ea.type !=3D OP_REG || !evex.brs ) + avx512_vlen_check(b & 1); + goto simd_imm8_zmm; + case X86EMUL_OPC_VEX_66(0x0f3a, 0x5c): /* vfmaddsubps {x,y}mm,{x,y}mm/= mem,{x,y}mm,{x,y}mm */ /* vfmaddsubps {x,y}mm/mem,{x,y= }mm,{x,y}mm,{x,y}mm */ case X86EMUL_OPC_VEX_66(0x0f3a, 0x5d): /* vfmaddsubpd {x,y}mm,{x,y}mm/= mem,{x,y}mm,{x,y}mm */