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Thu, 09 Apr 2026 08:15:06 -0700 (PDT) Message-ID: <476e3ba2-275f-4fda-bbae-090dee92e089@suse.com> Date: Thu, 9 Apr 2026 17:15:04 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v4 14/16] x86emul: support AVX10.2 saturating convert 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-33051d/1775747707-41713C9A-4A26ED8E/0/0 X-purgate-type: clean X-purgate-size: 9105 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1775747730351154100 Content-Type: text/plain; charset="utf-8" While the to-byte ones are somewhat different from what has been there (yet then nicely regular from an operands perspective), the others are pretty similar to various existing insns. Signed-off-by: Jan Beulich --- Spec rev 002 says VCVTTNEBF162I{,U}BS, yet that's going to change to VCVTTBF162I{,U}BS. --- SDE: -dmr / -future --- v4: Update to spec version 3. Switch to using fallthrough pseudo- keyword. Series re-ordering adjustments. v3: New. --- a/tools/tests/x86_emulator/evex-disp8.c +++ b/tools/tests/x86_emulator/evex-disp8.c @@ -727,6 +727,30 @@ static const struct test avx10_2_all[] =3D INSN(comisbf16, 66, map5, 2f, el, bf16, el), INSN_SFP(comx, 0f, 2f), INSN(comxsh, f3, map5, 2f, el, fp16, el), + INSN(cvtbf162ibs, f2, map5, 69, vl, bf16, vl), + INSN(cvtbf162iubs, f2, map5, 6b, vl, bf16, vl), + INSN(cvtph2ibs, , map5, 69, vl, fp16, vl), + INSN(cvtph2iubs, , map5, 6b, vl, fp16, vl), + INSN(cvtps2ibs, 66, map5, 69, vl, d, vl), + INSN(cvtps2iubs, 66, map5, 6b, vl, d, vl), + INSN(cvttbf162ibs, f2, map5, 68, vl, bf16, vl), + INSN(cvttbf162iubs, f2, map5, 6a, vl, bf16, vl), + INSN(cvttpd2dqs, , map5, 6d, vl, q, vl), + INSN(cvttpd2qqs, 66, map5, 6d, vl, q, vl), + INSN(cvttpd2udqs, , map5, 6c, vl, q, vl), + INSN(cvttpd2uqqs, 66, map5, 6c, vl, q, vl), + INSN(cvttph2ibs, , map5, 68, vl, fp16, vl), + INSN(cvttph2iubs, , map5, 6a, vl, fp16, vl), + INSN(cvttps2dqs, , map5, 6d, vl, d, vl), + INSN(cvttps2ibs, 66, map5, 68, vl, d, vl), + INSN(cvttps2iubs, 66, map5, 6a, vl, d, vl), + INSN(cvttps2qqs, 66, map5, 6d, vl_2, d, vl), + INSN(cvttps2udqs, , map5, 6c, vl, d, vl), + INSN(cvttps2uqqs, 66, map5, 6c, vl_2, d, vl), + INSN(cvttsd2sis, f2, map5, 6d, el, q, el), + INSN(cvttsd2usis, f2, map5, 6c, el, q, el), + INSN(cvttss2sis, f3, map5, 6d, el, d, el), + INSN(cvttss2usis, f3, map5, 6c, el, d, el), INSN(divbf16, 66, map5, 5e, vl, bf16, vl), INSN(dpphps, , 0f38, 52, vl, d, vl), INSN(fmadd132bf16, , map6, 98, vl, bf16, vl), --- a/tools/tests/x86_emulator/predicates.c +++ b/tools/tests/x86_emulator/predicates.c @@ -2163,6 +2163,26 @@ static const struct evex { { { 0x5f }, 2, T, R, pfx_no, W0, Ln }, /* vmaxph */ { { 0x5f }, 2, T, R, pfx_66, W0, Ln }, /* vmaxbf16 */ { { 0x5f }, 2, T, R, pfx_f3, W0, LIG }, /* vmaxsh */ + { { 0x68 }, 2, T, R, pfx_no, W0, Ln }, /* vcvttph2ibs */ + { { 0x68 }, 2, T, R, pfx_66, W0, Ln }, /* vcvttps2ibs */ + { { 0x68 }, 2, T, R, pfx_f2, W0, Ln }, /* vcvttbf162ibs */ + { { 0x69 }, 2, T, R, pfx_no, W0, Ln }, /* vcvtph2ibs */ + { { 0x69 }, 2, T, R, pfx_66, W0, Ln }, /* vcvtps2ibs */ + { { 0x69 }, 2, T, R, pfx_f2, W0, Ln }, /* vcvtbf162ibs */ + { { 0x6a }, 2, T, R, pfx_no, W0, Ln }, /* vcvttph2iubs */ + { { 0x6a }, 2, T, R, pfx_66, W0, Ln }, /* vcvttps2iubs */ + { { 0x6a }, 2, T, R, pfx_f2, W0, Ln }, /* vcvttbf162iubs */ + { { 0x6b }, 2, T, R, pfx_no, W0, Ln }, /* vcvtph2iubs */ + { { 0x6b }, 2, T, R, pfx_66, W0, Ln }, /* vcvtps2iubs */ + { { 0x6b }, 2, T, R, pfx_f2, W0, Ln }, /* vcvtbf162iubs */ + { { 0x6c }, 2, T, R, pfx_no, Wn, Ln }, /* vcvttp{s,d}2udqs */ + { { 0x6c }, 2, T, R, pfx_66, Wn, Ln }, /* vcvttp{s,d}2uqqs */ + { { 0x6c }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvttss2usis */ + { { 0x6c }, 2, T, R, pfx_f2, Wn, LIG }, /* vcvttsd2usis */ + { { 0x6d }, 2, T, R, pfx_no, Wn, Ln }, /* vcvttp{s,d}2dqs */ + { { 0x6d }, 2, T, R, pfx_66, Wn, Ln }, /* vcvttp{s,d}2qqs */ + { { 0x6d }, 2, T, R, pfx_f3, Wn, LIG }, /* vcvttss2sis */ + { { 0x6d }, 2, T, R, pfx_f2, Wn, LIG }, /* vcvttsd2sis */ { { 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} */ --- a/xen/arch/x86/x86_emulate/decode.c +++ b/xen/arch/x86/x86_emulate/decode.c @@ -1541,6 +1541,19 @@ int x86emul_decode(struct x86_emulate_st s->fp16 =3D true; break; =20 + case 0x68: /* vcvtt{ph,ps,bf16}2ibs */ + case 0x69: /* vcvt{ph,ps,nebf16}2ibs */ + case 0x6a: /* vcvtt{ph,ps,bf16}2iubs */ + case 0x6b: /* vcvt{ph,ps,nebf16}2iubs */ + if ( !s->evex.pfx || s->evex.pfx =3D=3D vex_f2 ) + s->fp16 =3D true; + fallthrough; + case 0x6c: /* vcvttp{s,d}2u{d,q}qs, vcvtts{s,d}2usis */ + case 0x6d: /* vcvttp{s,d}2{d,q}qs, vcvtts{s,d}2sis */ + d |=3D TwoOp; + s->simd_size =3D simd_other; + break; + case 0x6e: /* vmovw r/x/m16, xmm */ d =3D (d & ~SrcMask) | SrcMem16; /* fall through */ @@ -1606,6 +1619,14 @@ int x86emul_decode(struct x86_emulate_st --disp8scale; break; =20 + case 0x6c: /* vcvttps2uqqs and vcvts{s,d}2usi need special cas= ing */ + case 0x6d: /* vcvttps2qqs and vcvts{s,d}2si need special casin= g */ + if ( s->evex.pfx =3D=3D vex_66 && !s->evex.w && !s->evex.b= rs ) + --disp8scale; + else if ( s->evex.pfx & VEX_PREFIX_SCALAR_MASK ) + disp8scale =3D s->evex.pfx & VEX_PREFIX_DOUBLE_MASK ? = 3 : 2; + break; + case 0x7a: case 0x7b: /* vcvt{,t}ph2qq need special casing */ if ( s->evex.pfx =3D=3D vex_66 && !s->evex.brs ) disp8scale =3D s->evex.brs ? 1 : 2 + s->evex.lr; --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -8006,6 +8006,55 @@ x86_emulate( op_bytes =3D 8 << evex.lr; goto simd_zmm; =20 + case X86EMUL_OPC_EVEX_F2(5, 0x68): /* vcvttbf162ibs [xyz]mm/mem,[xyz]m= m{k} */ + case X86EMUL_OPC_EVEX_F2(5, 0x69): /* vcvtbf162ibs [xyz]mm/mem,[xyz]mm= {k} */ + case X86EMUL_OPC_EVEX_F2(5, 0x6a): /* vcvttbf162iubs [xyz]mm/mem,[xyz]= mm{k} */ + case X86EMUL_OPC_EVEX_F2(5, 0x6b): /* vcvtbf162iubs [xyz]mm/mem,[xyz]m= m{k} */ + generate_exception_if(ea.type !=3D OP_MEM && evex.brs, X86_EXC_UD); + fallthrough; + case X86EMUL_OPC_EVEX (5, 0x68): /* vcvttph2ibs [xyz]mm/mem,[xyz]mm{= k} */ + case X86EMUL_OPC_EVEX_66(5, 0x68): /* vcvttps2ibs [xyz]mm/mem,[xyz]mm{= k} */ + case X86EMUL_OPC_EVEX (5, 0x69): /* vcvtph2ibs [xyz]mm/mem,[xyz]mm{k= } */ + case X86EMUL_OPC_EVEX_66(5, 0x69): /* vcvtps2ibs [xyz]mm/mem,[xyz]mm{k= } */ + case X86EMUL_OPC_EVEX (5, 0x6a): /* vcvttph2iubs [xyz]mm/mem,[xyz]mm= {k} */ + case X86EMUL_OPC_EVEX_66(5, 0x6a): /* vcvttps2iubs [xyz]mm/mem,[xyz]mm= {k} */ + case X86EMUL_OPC_EVEX (5, 0x6b): /* vcvtph2iubs [xyz]mm/mem,[xyz]mm{= k} */ + case X86EMUL_OPC_EVEX_66(5, 0x6b): /* vcvtps2iubs [xyz]mm/mem,[xyz]mm{= k} */ + generate_exception_if(evex.w, X86_EXC_UD); + vcpu_must_have(avx10, 2); + if ( ea.type !=3D OP_REG || !evex.brs ) + avx512_vlen_check(false); + op_bytes =3D 16 << evex.lr; + goto simd_zmm; + + case X86EMUL_OPC_EVEX (5, 0x6c): /* vcvttps2udqs [xyz]mm/mem,[xyz]mm= {k} */ + /* vcvttpd2udqs [xyz]mm/mem,{x,y}mm= {k} */ + case X86EMUL_OPC_EVEX_66(5, 0x6c): /* vcvttps2uqqs {x,y}mm/mem,[xyz]mm= {k} */ + /* vcvttpd2uqqs [xyz]mm/mem,[xyz]mm= {k} */ + case X86EMUL_OPC_EVEX (5, 0x6d): /* vcvttps2dqs [xyz]mm/mem,[xyz]mm{= k} */ + /* vcvttpd2dqs [xyz]mm/mem,{x,y}mm{= k} */ + case X86EMUL_OPC_EVEX_66(5, 0x6d): /* vcvttps2qqs {x,y}mm/mem,[xyz]mm{= k} */ + /* vcvttpd2qqs [xyz]mm/mem,[xyz]mm{= k} */ + vcpu_must_have(avx10, 2); + if ( ea.type !=3D OP_REG || !evex.brs ) + avx512_vlen_check(false); + op_bytes =3D 8 << ((evex.w || !evex.pfx) + evex.lr); + goto simd_zmm; + + CASE_SIMD_SCALAR_FP(_EVEX, 5, 0x6c): /* vcvtts{s,d}2usis xmm/mem,reg */ + CASE_SIMD_SCALAR_FP(_EVEX, 5, 0x6d): /* vcvtts{s,d}2sis xmm/mem,reg */ + generate_exception_if((evex.reg !=3D 0xf || !evex.RX || !evex.R || + evex.opmsk), + X86_EXC_UD); + vcpu_must_have(avx10, 2); + if ( !evex.brs ) + avx512_vlen_check(true); + else + generate_exception_if(ea.type !=3D OP_REG, X86_EXC_UD); + get_fpu(X86EMUL_FPU_zmm); + opc =3D init_evex(stub); + goto cvts_2si; + case X86EMUL_OPC_EVEX_F2(5, 0x6f): /* vmovrs{b,w} mem,[xyz]mm{k} */ elem_bytes =3D 1 << evex.w; fallthrough;