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Thu, 09 Apr 2026 08:07:18 -0700 (PDT) Message-ID: <4aa12415-2135-4e1c-b5a0-dcc4b01f71fc@suse.com> Date: Thu, 9 Apr 2026 17:07:17 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v4 10/16] x86emul: support AVX10.2 partial copy 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-42698a/1775747239-F5DC12A1-5140499A/0/0 X-purgate-type: clean X-purgate-size: 6364 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1775747259871154100 Content-Type: text/plain; charset="utf-8" Extend existing VMOV{Q,W} logic accordingly. Signed-off-by: Jan Beulich --- SDE: -dmr / -future --- v4: Series re-ordering adjustments. v3: New. --- a/tools/tests/x86_emulator/evex-disp8.c +++ b/tools/tests/x86_emulator/evex-disp8.c @@ -729,6 +729,13 @@ static const struct test avx10_2_all[] =3D INSN(ucomxsh, f3, map5, 2e, el, fp16, el), }; =20 +static const struct test avx10_2_128[] =3D { + INSN(movd, f3, 0f, 7e, el, d, el), + INSN(movd, 66, 0f, d6, el, d, el), + INSN(movw, f3, map5, 6e, el, fp16, el), + INSN(movw, f3, map5, 7e, el, fp16, el), +}; + static const struct test movrs_all[] =3D { INSN(movrsb, f2, map5, 6f, vl, b, vl), INSN(movrsd, f3, map5, 6f, vl, d_nb, vl), @@ -1165,4 +1172,5 @@ void evex_disp8_test(void *instr, struct } =20 run(cpu_has_avx10_2, avx10_2, all); + run(cpu_has_avx10_2, avx10_2, 128); } --- a/tools/tests/x86_emulator/predicates.c +++ b/tools/tests/x86_emulator/predicates.c @@ -1782,7 +1782,7 @@ static const struct evex { { { 0x7b }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvtusi2ss */ { { 0x7b }, 2, T, R, pfx_f2, Wn, LIG }, /* vcvtusi2sd */ { { 0x7e }, 2, T, W, pfx_66, Wn, L0 }, /* vmov{d,q} */ - { { 0x7e }, 2, T, R, pfx_f3, W1, L0 }, /* vmovq */ + { { 0x7e }, 2, T, R, pfx_f3, Wn, L0 }, /* vmov{d,q} */ { { 0x7f }, 2, T, W, pfx_66, Wn, Ln }, /* vmovdqa{32,64} */ { { 0x7f }, 2, T, W, pfx_f3, Wn, Ln }, /* vmovdqu{32,64} */ { { 0x7f }, 2, T, W, pfx_f2, Wn, Ln }, /* vmovdqu{8,16} */ @@ -1799,7 +1799,7 @@ static const struct evex { { { 0xd3 }, 2, T, R, pfx_66, W1, Ln }, /* vpsrlq */ { { 0xd4 }, 2, T, R, pfx_66, W1, Ln }, /* vpaddq */ { { 0xd5 }, 2, T, R, pfx_66, WIG, Ln }, /* vpmullw */ - { { 0xd6 }, 2, T, W, pfx_66, W1, L0 }, /* vmovq */ + { { 0xd6 }, 2, T, W, pfx_66, Wn, L0 }, /* vmov{d,q} */ { { 0xd8 }, 2, T, R, pfx_66, WIG, Ln }, /* vpsubusb */ { { 0xd9 }, 2, T, R, pfx_66, WIG, Ln }, /* vpsubusw */ { { 0xda }, 2, T, R, pfx_66, WIG, Ln }, /* vpminub */ @@ -2133,6 +2133,7 @@ static const struct evex { { { 0x5f }, 2, T, R, pfx_no, W0, Ln }, /* vmaxph */ { { 0x5f }, 2, T, R, pfx_f3, W0, LIG }, /* vmaxsh */ { { 0x6e }, 2, T, R, pfx_66, WIG, L0 }, /* vmovw */ + { { 0x6e }, 2, T, R, pfx_f3, W0, L0 }, /* vmovw */ { { 0x6f }, 2, T, R, pfx_f3, Wn, Ln }, /* vmovrs{d,q} */ { { 0x6f }, 2, T, R, pfx_f2, Wn, Ln }, /* vmovrs{b,w} */ { { 0x78 }, 2, T, R, pfx_no, W0, Ln }, /* vcvttph2udq */ @@ -2153,6 +2154,7 @@ static const struct evex { { { 0x7d }, 2, T, R, pfx_f3, W0, Ln }, /* vcvtw2ph */ { { 0x7d }, 2, T, R, pfx_f2, W0, Ln }, /* vcvtuwph */ { { 0x7e }, 2, T, W, pfx_66, WIG, L0 }, /* vmovw */ + { { 0x7e }, 2, T, W, pfx_f3, W0, L0 }, /* vmovw */ }, evex_map6[] =3D { { { 0x13 }, 2, T, R, pfx_66, W0, Ln }, /* vcvtph2psx */ { { 0x13 }, 2, T, R, pfx_no, W0, LIG }, /* vcvtsh2ss */ --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -293,7 +293,7 @@ static const struct twobyte_table { [0xd0] =3D { DstImplicit|SrcMem|ModRM, simd_other }, [0xd1 ... 0xd3] =3D { DstImplicit|SrcMem|ModRM, simd_128, 4 }, [0xd4 ... 0xd5] =3D { DstImplicit|SrcMem|ModRM, simd_packed_int, d8s_v= l }, - [0xd6] =3D { DstMem|SrcImplicit|ModRM|Mov, simd_other, 3 }, + [0xd6] =3D { DstMem|SrcImplicit|ModRM|Mov, simd_other, d8s_dq }, [0xd7] =3D { DstReg|SrcImplicit|ModRM|Mov }, [0xd8 ... 0xdf] =3D { DstImplicit|SrcMem|ModRM, simd_packed_int, d8s_v= l }, [0xe0] =3D { DstImplicit|SrcMem|ModRM, simd_packed_int, d8s_vl }, @@ -803,7 +803,7 @@ decode_twobyte(struct x86_emulate_state if ( s->vex.pfx =3D=3D vex_f3 ) /* movq xmm/m64,xmm */ { case X86EMUL_OPC_VEX_F3(0, 0x7e): /* vmovq xmm/m64,xmm */ - case X86EMUL_OPC_EVEX_F3(0, 0x7e): /* vmovq xmm/m64,xmm */ + case X86EMUL_OPC_EVEX_F3(0, 0x7e): /* vmov{d,q} xmm/mem,xmm */ s->desc =3D DstImplicit | SrcMem | TwoOp; s->simd_size =3D simd_other; /* Avoid the s->desc clobbering of TwoOp below. */ @@ -1416,7 +1416,7 @@ int x86emul_decode(struct x86_emulate_st break; =20 case 0x7e: /* vmovq xmm/m64,xmm needs special casing */ - if ( disp8scale =3D=3D 2 && s->evex.pfx =3D=3D vex_f3 ) + if ( disp8scale =3D=3D 2 && s->evex.pfx =3D=3D vex_f3 && s= ->evex.w ) disp8scale =3D 3; break; =20 @@ -1525,13 +1525,13 @@ int x86emul_decode(struct x86_emulate_st s->fp16 =3D true; break; =20 - case 0x6e: /* vmovw r/m16, xmm */ + case 0x6e: /* vmovw r/x/m16, xmm */ d =3D (d & ~SrcMask) | SrcMem16; /* fall through */ - case 0x7e: /* vmovw xmm, r/m16 */ + case 0x7e: /* vmovw xmm, r/x/m16 */ + s->fp16 =3D true; if ( s->evex.pfx =3D=3D vex_66 ) - s->fp16 =3D true; - s->simd_size =3D simd_none; + s->simd_size =3D simd_none; break; =20 case 0x78: case 0x79: /* vcvt{,t}ph2u{d,q}q, vcvt{,t}sh2usi */ --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -4938,13 +4938,17 @@ x86_emulate( op_bytes =3D 8; goto simd_0f_int; =20 - case X86EMUL_OPC_EVEX_F3(0x0f, 0x7e): /* vmovq xmm/m64,xmm */ - case X86EMUL_OPC_EVEX_66(0x0f, 0xd6): /* vmovq xmm,xmm/m64 */ - generate_exception_if(evex.lr || !evex.w || evex.opmsk || evex.brs, - X86_EXC_UD); - visa_check(f); + case X86EMUL_OPC_EVEX_F3(0x0f, 0x7e): /* vmov{d,q} xmm/mem,xmm */ + case X86EMUL_OPC_EVEX_66(0x0f, 0xd6): /* vmov{d,q} xmm,xmm/mem */ + case X86EMUL_OPC_EVEX_F3(5, 0x6e): /* vmovw xmm/m16,xmm */ + case X86EMUL_OPC_EVEX_F3(5, 0x7e): /* vmovw xmm,xmm/m16 */ + generate_exception_if(evex.lr || evex.opmsk || evex.brs, X86_EXC_U= D); + if ( evex.w ) + visa_check(f); + else + vcpu_must_have(avx10, 2); d |=3D TwoOp; - op_bytes =3D 8; + op_bytes =3D 2 << (!state->fp16 + evex.w); goto simd_zmm; =20 #endif /* !X86EMUL_NO_SIMD */