diff mbox series

[RFC,v4,40/75] target/i386: introduce SSE code generators

Message ID 20190821172951.15333-41-jan.bobek@gmail.com (mailing list archive)
State New, archived
Headers show
Series rewrite MMX/SSE*/AVX/AVX2 vector instruction translation | expand

Commit Message

Jan Bobek Aug. 21, 2019, 5:29 p.m. UTC 
Introduce code generators required by SSE instructions.

Signed-off-by: Jan Bobek <jan.bobek@gmail.com>
---
 target/i386/translate.c | 309 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 309 insertions(+)
diff mbox series

Patch

diff --git a/target/i386/translate.c b/target/i386/translate.c
index d77c08b7db..d1537bc1b7 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -5586,6 +5586,90 @@  GEN_INSN2(movq, Eq, Pq)
 
 DEF_GEN_INSN2_GVEC(movq, Pq, Qq, mov, MM_OPRSZ, MM_MAXSZ, MO_64)
 DEF_GEN_INSN2_GVEC(movq, Qq, Pq, mov, MM_OPRSZ, MM_MAXSZ, MO_64)
+DEF_GEN_INSN2_GVEC(movaps, Vdq, Wdq, mov, XMM_OPRSZ, XMM_MAXSZ, MO_64)
+DEF_GEN_INSN2_GVEC(movaps, Wdq, Vdq, mov, XMM_OPRSZ, XMM_MAXSZ, MO_64)
+DEF_GEN_INSN2_GVEC(movups, Vdq, Wdq, mov, XMM_OPRSZ, XMM_MAXSZ, MO_64)
+DEF_GEN_INSN2_GVEC(movups, Wdq, Vdq, mov, XMM_OPRSZ, XMM_MAXSZ, MO_64)
+
+GEN_INSN4(movss, Vdq, Vdq, Wd, modrm_mod)
+{
+    const TCGv_i32 r32 = tcg_temp_new_i32();
+    const TCGv_i64 r64 = tcg_temp_new_i64();
+    if (arg4 == 3) {
+        /* merging movss */
+        tcg_gen_ld_i32(r32, cpu_env, arg3 + offsetof(ZMMReg, ZMM_L(0)));
+        tcg_gen_st_i32(r32, cpu_env, arg1 + offsetof(ZMMReg, ZMM_L(0)));
+        if (arg1 != arg2) {
+            tcg_gen_ld_i32(r32, cpu_env, arg2 + offsetof(ZMMReg, ZMM_L(1)));
+            tcg_gen_st_i32(r32, cpu_env, arg1 + offsetof(ZMMReg, ZMM_L(1)));
+            tcg_gen_ld_i64(r64, cpu_env, arg2 + offsetof(ZMMReg, ZMM_Q(1)));
+            tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(1)));
+        }
+    } else {
+        /* zero-extending movss */
+        tcg_gen_ld_i32(r32, cpu_env, arg3 + offsetof(ZMMReg, ZMM_L(0)));
+        tcg_gen_extu_i32_i64(r64, r32);
+        tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(0)));
+        tcg_gen_movi_i64(r64, 0);
+        tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(1)));
+    }
+    tcg_temp_free_i32(r32);
+    tcg_temp_free_i64(r64);
+}
+GEN_INSN2(movss, Wd, Vd)
+{
+    gen_insn4(movss, Vdq, Vdq, Wd, modrm_mod)(env, s, arg1, arg1, arg2, 3);
+}
+
+GEN_INSN3(movhlps, Vdq, Vdq, UdqMhq)
+{
+    const TCGv_i64 r64 = tcg_temp_new_i64();
+    tcg_gen_ld_i64(r64, cpu_env, arg3 + offsetof(ZMMReg, ZMM_Q(1)));
+    tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(0)));
+    if (arg1 != arg2) {
+        tcg_gen_ld_i64(r64, cpu_env, arg2 + offsetof(ZMMReg, ZMM_Q(1)));
+        tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(1)));
+    }
+    tcg_temp_free_i64(r64);
+}
+GEN_INSN2(movlps, Mq, Vq)
+{
+    insnop_ldst(xmm, Mq)(env, s, 1, arg2, arg1);
+}
+
+GEN_INSN3(movlhps, Vdq, Vq, Wq)
+{
+    const TCGv_i64 r64 = tcg_temp_new_i64();
+    tcg_gen_ld_i64(r64, cpu_env, arg3 + offsetof(ZMMReg, ZMM_Q(0)));
+    tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(1)));
+    if (arg1 != arg2) {
+        tcg_gen_ld_i64(r64, cpu_env, arg2 + offsetof(ZMMReg, ZMM_Q(0)));
+        tcg_gen_st_i64(r64, cpu_env, arg1 + offsetof(ZMMReg, ZMM_Q(0)));
+    }
+    tcg_temp_free_i64(r64);
+}
+GEN_INSN2(movhps, Mq, Vdq)
+{
+    insnop_ldst(xmm, Mhq)(env, s, 1, arg2, arg1);
+}
+
+DEF_GEN_INSN2_HELPER_DEP(pmovmskb, pmovmskb_mmx, Gd, Nq)
+GEN_INSN2(pmovmskb, Gq, Nq)
+{
+    const TCGv_i32 arg1_r32 = tcg_temp_new_i32();
+    gen_insn2(pmovmskb, Gd, Nq)(env, s, arg1_r32, arg2);
+    tcg_gen_extu_i32_i64(arg1, arg1_r32);
+    tcg_temp_free_i32(arg1_r32);
+}
+
+DEF_GEN_INSN2_HELPER_DEP(movmskps, movmskps, Gd, Udq)
+GEN_INSN2(movmskps, Gq, Udq)
+{
+    const TCGv_i32 arg1_r32 = tcg_temp_new_i32();
+    gen_insn2(movmskps, Gd, Udq)(env, s, arg1_r32, arg2);
+    tcg_gen_extu_i32_i64(arg1, arg1_r32);
+    tcg_temp_free_i32(arg1_r32);
+}
 
 DEF_GEN_INSN3_GVEC(paddb, Pq, Pq, Qq, add, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(paddw, Pq, Pq, Qq, add, MM_OPRSZ, MM_MAXSZ, MO_16)
@@ -5594,6 +5678,8 @@  DEF_GEN_INSN3_GVEC(paddsb, Pq, Pq, Qq, ssadd, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(paddsw, Pq, Pq, Qq, ssadd, MM_OPRSZ, MM_MAXSZ, MO_16)
 DEF_GEN_INSN3_GVEC(paddusb, Pq, Pq, Qq, usadd, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(paddusw, Pq, Pq, Qq, usadd, MM_OPRSZ, MM_MAXSZ, MO_16)
+DEF_GEN_INSN3_HELPER_EPP(addps, addps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(addss, addss, Vd, Vd, Wd)
 
 DEF_GEN_INSN3_GVEC(psubb, Pq, Pq, Qq, sub, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(psubw, Pq, Pq, Qq, sub, MM_OPRSZ, MM_MAXSZ, MO_16)
@@ -5602,11 +5688,38 @@  DEF_GEN_INSN3_GVEC(psubsb, Pq, Pq, Qq, sssub, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(psubsw, Pq, Pq, Qq, sssub, MM_OPRSZ, MM_MAXSZ, MO_16)
 DEF_GEN_INSN3_GVEC(psubusb, Pq, Pq, Qq, ussub, MM_OPRSZ, MM_MAXSZ, MO_8)
 DEF_GEN_INSN3_GVEC(psubusw, Pq, Pq, Qq, ussub, MM_OPRSZ, MM_MAXSZ, MO_16)
+DEF_GEN_INSN3_HELPER_EPP(subps, subps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(subss, subss, Vd, Vd, Wd)
 
 DEF_GEN_INSN3_HELPER_EPP(pmullw, pmullw_mmx, Pq, Pq, Qq)
 DEF_GEN_INSN3_HELPER_EPP(pmulhw, pmulhw_mmx, Pq, Pq, Qq)
+DEF_GEN_INSN3_HELPER_EPP(pmulhuw, pmulhuw_mmx, Pq, Pq, Qq)
+DEF_GEN_INSN3_HELPER_EPP(mulps, mulps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(mulss, mulss, Vd, Vd, Wd)
 DEF_GEN_INSN3_HELPER_EPP(pmaddwd, pmaddwd_mmx, Pq, Pq, Qq)
 
+DEF_GEN_INSN3_HELPER_EPP(divps, divps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(divss, divss, Vd, Vd, Wd)
+
+DEF_GEN_INSN2_HELPER_EPP(rcpps, rcpps, Vdq, Wdq)
+DEF_GEN_INSN2_HELPER_EPP(rcpss, rcpss, Vd, Wd)
+DEF_GEN_INSN2_HELPER_EPP(sqrtps, sqrtps, Vdq, Wdq)
+DEF_GEN_INSN2_HELPER_EPP(sqrtss, sqrtss, Vd, Wd)
+DEF_GEN_INSN2_HELPER_EPP(rsqrtps, rsqrtps, Vdq, Wdq)
+DEF_GEN_INSN2_HELPER_EPP(rsqrtss, rsqrtss, Vd, Wd)
+
+DEF_GEN_INSN3_GVEC(pminub, Pq, Pq, Qq, umin, MM_OPRSZ, MM_MAXSZ, MO_8)
+DEF_GEN_INSN3_GVEC(pminsw, Pq, Pq, Qq, smin, MM_OPRSZ, MM_MAXSZ, MO_16)
+DEF_GEN_INSN3_HELPER_EPP(minps, minps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(minss, minss, Vd, Vd, Wd)
+DEF_GEN_INSN3_GVEC(pmaxub, Pq, Pq, Qq, umax, MM_OPRSZ, MM_MAXSZ, MO_8)
+DEF_GEN_INSN3_GVEC(pmaxsw, Pq, Pq, Qq, smax, MM_OPRSZ, MM_MAXSZ, MO_16)
+DEF_GEN_INSN3_HELPER_EPP(maxps, maxps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(maxss, maxss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(pavgb, pavgb_mmx, Pq, Pq, Qq)
+DEF_GEN_INSN3_HELPER_EPP(pavgw, pavgw_mmx, Pq, Pq, Qq)
+DEF_GEN_INSN3_HELPER_EPP(psadbw, psadbw_mmx, Pq, Pq, Qq)
+
 DEF_GEN_INSN3_GVEC(pcmpeqb, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_8, TCG_COND_EQ)
 DEF_GEN_INSN3_GVEC(pcmpeqw, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_16, TCG_COND_EQ)
 DEF_GEN_INSN3_GVEC(pcmpeqd, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_32, TCG_COND_EQ)
@@ -5614,10 +5727,98 @@  DEF_GEN_INSN3_GVEC(pcmpgtb, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_8, TCG_COND_
 DEF_GEN_INSN3_GVEC(pcmpgtw, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_16, TCG_COND_GT)
 DEF_GEN_INSN3_GVEC(pcmpgtd, Pq, Pq, Qq, cmp, MM_OPRSZ, MM_MAXSZ, MO_32, TCG_COND_GT)
 
+DEF_GEN_INSN3_HELPER_EPP(cmpeqps, cmpeqps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpeqss, cmpeqss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpltps, cmpltps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpltss, cmpltss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpleps, cmpleps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpless, cmpless, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpunordps, cmpunordps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpunordss, cmpunordss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpneqps, cmpneqps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpneqss, cmpneqss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpnltps, cmpnltps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpnltss, cmpnltss, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpnleps, cmpnleps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpnless, cmpnless, Vd, Vd, Wd)
+DEF_GEN_INSN3_HELPER_EPP(cmpordps, cmpordps, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(cmpordss, cmpordss, Vd, Vd, Wd)
+
+GEN_INSN4(cmpps, Vdq, Vdq, Wdq, Ib)
+{
+    switch (arg4 & 7) {
+    case 0:
+        gen_insn3(cmpeqps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 1:
+        gen_insn3(cmpltps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 2:
+        gen_insn3(cmpleps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 3:
+        gen_insn3(cmpunordps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 4:
+        gen_insn3(cmpneqps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 5:
+        gen_insn3(cmpnltps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 6:
+        gen_insn3(cmpnleps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    case 7:
+        gen_insn3(cmpordps, Vdq, Vdq, Wdq)(env, s, arg1, arg2, arg3);
+        return;
+    }
+
+    g_assert_not_reached();
+}
+
+GEN_INSN4(cmpss, Vd, Vd, Wd, Ib)
+{
+    switch (arg4 & 7) {
+    case 0:
+        gen_insn3(cmpeqss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 1:
+        gen_insn3(cmpltss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 2:
+        gen_insn3(cmpless, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 3:
+        gen_insn3(cmpunordss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 4:
+        gen_insn3(cmpneqss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 5:
+        gen_insn3(cmpnltss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 6:
+        gen_insn3(cmpnless, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    case 7:
+        gen_insn3(cmpordss, Vd, Vd, Wd)(env, s, arg1, arg2, arg3);
+        return;
+    }
+
+    g_assert_not_reached();
+}
+
+DEF_GEN_INSN2_HELPER_EPP(comiss, comiss, Vd, Wd)
+DEF_GEN_INSN2_HELPER_EPP(ucomiss, ucomiss, Vd, Wd)
+
 DEF_GEN_INSN3_GVEC(pand, Pq, Pq, Qq, and, MM_OPRSZ, MM_MAXSZ, MO_64)
+DEF_GEN_INSN3_GVEC(andps, Vdq, Vdq, Wdq, and, XMM_OPRSZ, XMM_MAXSZ, MO_64)
 DEF_GEN_INSN3_GVEC(pandn, Pq, Pq, Qq, andn, MM_OPRSZ, MM_MAXSZ, MO_64)
+DEF_GEN_INSN3_GVEC(andnps, Vdq, Vdq, Wdq, andn, XMM_OPRSZ, XMM_MAXSZ, MO_64)
 DEF_GEN_INSN3_GVEC(por, Pq, Pq, Qq, or, MM_OPRSZ, MM_MAXSZ, MO_64)
+DEF_GEN_INSN3_GVEC(orps, Vdq, Vdq, Wdq, or, XMM_OPRSZ, XMM_MAXSZ, MO_64)
 DEF_GEN_INSN3_GVEC(pxor, Pq, Pq, Qq, xor, MM_OPRSZ, MM_MAXSZ, MO_64)
+DEF_GEN_INSN3_GVEC(xorps, Vdq, Vdq, Wdq, xor, XMM_OPRSZ, XMM_MAXSZ, MO_64)
 
 DEF_GEN_INSN3_HELPER_EPP(psllw, psllw_mmx, Pq, Pq, Qq)
 DEF_GEN_INSN3_HELPER_EPP(pslld, pslld_mmx, Pq, Pq, Qq)
@@ -5660,8 +5861,116 @@  DEF_GEN_INSN3_HELPER_EPP(punpckhbw, punpckhbw_mmx, Pq, Pq, Qq)
 DEF_GEN_INSN3_HELPER_EPP(punpckhwd, punpckhwd_mmx, Pq, Pq, Qq)
 DEF_GEN_INSN3_HELPER_EPP(punpckhdq, punpckhdq_mmx, Pq, Pq, Qq)
 
+DEF_GEN_INSN3_HELPER_EPP(unpcklps, punpckldq_xmm, Vdq, Vdq, Wdq)
+DEF_GEN_INSN3_HELPER_EPP(unpckhps, punpckhdq_xmm, Vdq, Vdq, Wdq)
+
+DEF_GEN_INSN3_HELPER_PPI(pshufw, pshufw_mmx, Pq, Qq, Ib)
+DEF_GEN_INSN4_HELPER_PPI(shufps, shufps, Vdq, Vdq, Wdq, Ib)
+
+GEN_INSN4(pinsrw, Pq, Pq, RdMw, Ib)
+{
+    assert(arg1 == arg2);
+
+    const size_t ofs = offsetof(MMXReg, MMX_W(arg4 & 3));
+    tcg_gen_st16_i32(arg3, cpu_env, arg1 + ofs);
+}
+
+GEN_INSN3(pextrw, Gd, Nq, Ib)
+{
+    const size_t ofs = offsetof(MMXReg, MMX_W(arg3 & 3));
+    tcg_gen_ld16u_i32(arg1, cpu_env, arg2 + ofs);
+}
+GEN_INSN3(pextrw, Gq, Nq, Ib)
+{
+    const size_t ofs = offsetof(MMXReg, MMX_W(arg3 & 3));
+    tcg_gen_ld16u_i64(arg1, cpu_env, arg2 + ofs);
+}
+
+DEF_GEN_INSN2_HELPER_EPP(cvtpi2ps, cvtpi2ps, Vdq, Qq)
+DEF_GEN_INSN2_HELPER_EPD(cvtsi2ss, cvtsi2ss, Vd, Ed)
+DEF_GEN_INSN2_HELPER_EPQ(cvtsi2ss, cvtsq2ss, Vd, Eq)
+DEF_GEN_INSN2_HELPER_EPP(cvtps2pi, cvtps2pi, Pq, Wq)
+DEF_GEN_INSN2_HELPER_DEP(cvtss2si, cvtss2si, Gd, Wd)
+DEF_GEN_INSN2_HELPER_QEP(cvtss2si, cvtss2sq, Gq, Wd)
+DEF_GEN_INSN2_HELPER_EPP(cvttps2pi, cvttps2pi, Pq, Wq)
+DEF_GEN_INSN2_HELPER_DEP(cvttss2si, cvttss2si, Gd, Wd)
+DEF_GEN_INSN2_HELPER_QEP(cvttss2si, cvttss2sq, Gq, Wd)
+
+GEN_INSN2(maskmovq, Pq, Nq)
+{
+    const TCGv_ptr arg1_ptr = tcg_temp_new_ptr();
+    const TCGv_ptr arg2_ptr = tcg_temp_new_ptr();
+
+    tcg_gen_mov_tl(s->A0, cpu_regs[R_EDI]);
+    gen_extu(s->aflag, s->A0);
+    gen_add_A0_ds_seg(s);
+
+    tcg_gen_addi_ptr(arg1_ptr, cpu_env, arg1);
+    tcg_gen_addi_ptr(arg2_ptr, cpu_env, arg2);
+    gen_helper_maskmov_mmx(cpu_env, arg1_ptr, arg2_ptr, s->A0);
+
+    tcg_temp_free_ptr(arg1_ptr);
+    tcg_temp_free_ptr(arg2_ptr);
+}
+
+GEN_INSN2(movntps, Mdq, Vdq)
+{
+    insnop_ldst(xmm, Mdq)(env, s, 1, arg2, arg1);
+}
+
+GEN_INSN2(movntq, Mq, Pq)
+{
+    insnop_ldst(mm, Mq)(env, s, 1, arg2, arg1);
+}
+
 DEF_GEN_INSN0_HELPER(emms, emms)
 
+GEN_INSN0(sfence)
+{
+    if (s->prefix & PREFIX_LOCK) {
+        gen_illegal_opcode(s);
+    } else {
+        tcg_gen_mb(TCG_MO_ST_ST | TCG_BAR_SC);
+    }
+}
+
+GEN_INSN1(ldmxcsr, Md)
+{
+    if ((s->flags & HF_EM_MASK) || !(s->flags & HF_OSFXSR_MASK)) {
+        gen_illegal_opcode(s);
+    } else if (s->flags & HF_TS_MASK) {
+        gen_exception(s, EXCP07_PREX);
+    } else {
+        tcg_gen_qemu_ld_i32(s->tmp2_i32, arg1, s->mem_index, MO_LEUL);
+        gen_helper_ldmxcsr(cpu_env, s->tmp2_i32);
+    }
+}
+GEN_INSN1(stmxcsr, Md)
+{
+    if ((s->flags & HF_EM_MASK) || !(s->flags & HF_OSFXSR_MASK)) {
+        gen_illegal_opcode(s);
+    } else if (s->flags & HF_TS_MASK) {
+        gen_exception(s, EXCP07_PREX);
+    } else {
+        const size_t ofs = offsetof(CPUX86State, mxcsr);
+        tcg_gen_ld_i32(s->tmp2_i32, cpu_env, ofs);
+        tcg_gen_qemu_st_i32(s->tmp2_i32, arg1, s->mem_index, MO_LEUL);
+    }
+}
+
+GEN_INSN1(prefetcht0, Mb)
+{
+}
+GEN_INSN1(prefetcht1, Mb)
+{
+}
+GEN_INSN1(prefetcht2, Mb)
+{
+}
+GEN_INSN1(prefetchnta, Mb)
+{
+}
+
 /*
  * Instruction translators
  */