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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 44/47] x86emul: support AVX512F floating point manipulation insns
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v5: New.
--- a/tools/tests/x86_emulator/evex-disp8.c
+++ b/tools/tests/x86_emulator/evex-disp8.c
@@ -140,6 +140,8 @@ static const struct test avx512f_all[] =
INSN(cvtusi2sd, f2, 0f, 7b, el, dq64, el),
INSN(cvtusi2ss, f3, 0f, 7b, el, dq64, el),
INSN_FP(div, 0f, 5e),
+ INSN(fixupimm, 66, 0f3a, 54, vl, sd, vl),
+ INSN(fixupimm, 66, 0f3a, 55, el, sd, el),
INSN(fmadd132, 66, 0f38, 98, vl, sd, vl),
INSN(fmadd132, 66, 0f38, 99, el, sd, el),
INSN(fmadd213, 66, 0f38, a8, vl, sd, vl),
@@ -170,6 +172,10 @@ static const struct test avx512f_all[] =
INSN(fnmsub213, 66, 0f38, af, el, sd, el),
INSN(fnmsub231, 66, 0f38, be, vl, sd, vl),
INSN(fnmsub231, 66, 0f38, bf, el, sd, el),
+ INSN(getexp, 66, 0f38, 42, vl, sd, vl),
+ INSN(getexp, 66, 0f38, 43, el, sd, el),
+ INSN(getmant, 66, 0f3a, 26, vl, sd, vl),
+ INSN(getmant, 66, 0f3a, 27, el, sd, el),
INSN_FP(max, 0f, 5f),
INSN_FP(min, 0f, 5d),
INSN_SFP(mov, 0f, 10),
@@ -285,6 +291,8 @@ static const struct test avx512f_all[] =
INSN(rndscaless, 66, 0f3a, 0a, el, d, el),
INSN(rsqrt14, 66, 0f38, 4e, vl, sd, vl),
INSN(rsqrt14, 66, 0f38, 4f, el, sd, el),
+ INSN(scalef, 66, 0f38, 2c, vl, sd, vl),
+ INSN(scalef, 66, 0f38, 2d, el, sd, el),
INSN_PFP(shuf, 0f, c6),
INSN_FP(sqrt, 0f, 51),
INSN_FP(sub, 0f, 5c),
--- a/tools/tests/x86_emulator/simd.c
+++ b/tools/tests/x86_emulator/simd.c
@@ -174,6 +174,11 @@ static inline bool _to_bool(byte_vec_t b
asm ( op : [out] "=&x" (r_) : [in] "m" (x) ); \
(vec_t){ r_[0] }; \
})
+# define scalar_2op(x, y, op) ({ \
+ typeof((x)[0]) __attribute__((vector_size(16))) r_ = { x[0] }; \
+ asm ( op : [out] "=&x" (r_) : [in1] "[out]" (r_), [in2] "m" (y) ); \
+ (vec_t){ r_[0] }; \
+})
#endif
#if VEC_SIZE == 16 && FLOAT_SIZE == 4 && defined(__SSE__)
@@ -203,6 +208,8 @@ static inline bool _to_bool(byte_vec_t b
})
#elif defined(FLOAT_SIZE) && VEC_SIZE == FLOAT_SIZE && defined(__AVX512F__)
# if FLOAT_SIZE == 4
+# define getexp(x) scalar_1op(x, "vgetexpss %[in], %[out], %[out]")
+# define getmant(x) scalar_1op(x, "vgetmantss $0, %[in], %[out], %[out]")
# ifdef __AVX512ER__
# define recip(x) scalar_1op(x, "vrcp28ss %[in], %[out], %[out]")
# define rsqrt(x) scalar_1op(x, "vrsqrt28ss %[in], %[out], %[out]")
@@ -210,9 +217,12 @@ static inline bool _to_bool(byte_vec_t b
# define recip(x) scalar_1op(x, "vrcp14ss %[in], %[out], %[out]")
# define rsqrt(x) scalar_1op(x, "vrsqrt14ss %[in], %[out], %[out]")
# endif
+# define scale(x, y) scalar_2op(x, y, "vscalefss %[in2], %[in1], %[out]")
# define sqrt(x) scalar_1op(x, "vsqrtss %[in], %[out], %[out]")
# define trunc(x) scalar_1op(x, "vrndscaless $0b1011, %[in], %[out], %[out]")
# elif FLOAT_SIZE == 8
+# define getexp(x) scalar_1op(x, "vgetexpsd %[in], %[out], %[out]")
+# define getmant(x) scalar_1op(x, "vgetmantsd $0, %[in], %[out], %[out]")
# ifdef __AVX512ER__
# define recip(x) scalar_1op(x, "vrcp28sd %[in], %[out], %[out]")
# define rsqrt(x) scalar_1op(x, "vrsqrt28sd %[in], %[out], %[out]")
@@ -220,6 +230,7 @@ static inline bool _to_bool(byte_vec_t b
# define recip(x) scalar_1op(x, "vrcp14sd %[in], %[out], %[out]")
# define rsqrt(x) scalar_1op(x, "vrsqrt14sd %[in], %[out], %[out]")
# endif
+# define scale(x, y) scalar_2op(x, y, "vscalefsd %[in2], %[in1], %[out]")
# define sqrt(x) scalar_1op(x, "vsqrtsd %[in], %[out], %[out]")
# define trunc(x) scalar_1op(x, "vrndscalesd $0b1011, %[in], %[out], %[out]")
# endif
@@ -267,9 +278,12 @@ static inline bool _to_bool(byte_vec_t b
# define broadcast_octet(x) B(broadcastf32x8_, _mask, x, undef(), ~0)
# define insert_octet(x, y, p) B(insertf32x8_, _mask, x, y, p, undef(), ~0)
# endif
+# define getexp(x) BR(getexpps, _mask, x, undef(), ~0)
+# define getmant(x) BR(getmantps, _mask, x, 0, undef(), ~0)
# define max(x, y) BR_(maxps, _mask, x, y, undef(), ~0)
# define min(x, y) BR_(minps, _mask, x, y, undef(), ~0)
# define mix(x, y) B(movaps, _mask, x, y, (0b0101010101010101 & ALL_TRUE))
+# define scale(x, y) BR(scalefps, _mask, x, y, undef(), ~0)
# if VEC_SIZE == 64 && defined(__AVX512ER__)
# define recip(x) BR(rcp28ps, _mask, x, undef(), ~0)
# define rsqrt(x) BR(rsqrt28ps, _mask, x, undef(), ~0)
@@ -329,9 +343,12 @@ static inline bool _to_bool(byte_vec_t b
# define broadcast_quartet(x) B(broadcastf64x4_, , x, undef(), ~0)
# define insert_quartet(x, y, p) B(insertf64x4_, _mask, x, y, p, undef(), ~0)
# endif
+# define getexp(x) BR(getexppd, _mask, x, undef(), ~0)
+# define getmant(x) BR(getmantpd, _mask, x, 0, undef(), ~0)
# define max(x, y) BR_(maxpd, _mask, x, y, undef(), ~0)
# define min(x, y) BR_(minpd, _mask, x, y, undef(), ~0)
# define mix(x, y) B(movapd, _mask, x, y, 0b01010101)
+# define scale(x, y) BR(scalefpd, _mask, x, y, undef(), ~0)
# if VEC_SIZE == 64 && defined(__AVX512ER__)
# define recip(x) BR(rcp28pd, _mask, x, undef(), ~0)
# define rsqrt(x) BR(rsqrt28pd, _mask, x, undef(), ~0)
@@ -1759,6 +1776,28 @@ int simd_test(void)
# endif
#endif
+#if defined(getexp) && defined(getmant)
+ touch(src);
+ x = getmant(src);
+ touch(src);
+ y = getexp(src);
+ touch(src);
+ for ( j = i = 0; i < ELEM_COUNT; ++i )
+ {
+ if ( y[i] != j ) return __LINE__;
+
+ if ( !((i + 1) & (i + 2)) )
+ ++j;
+
+ if ( !(i & (i + 1)) && x[i] != 1 ) return __LINE__;
+ }
+# ifdef scale
+ touch(y);
+ z = scale(x, y);
+ if ( !eq(src, z) ) return __LINE__;
+# endif
+#endif
+
#if (defined(__XOP__) && VEC_SIZE == 16 && (INT_SIZE == 2 || INT_SIZE == 4))
|| \
(defined(__AVX512F__) && defined(FLOAT_SIZE))
return -fma_test();
--- a/tools/tests/x86_emulator/test_x86_emulator.c
+++ b/tools/tests/x86_emulator/test_x86_emulator.c
@@ -3895,6 +3895,44 @@ int main(int argc, char **argv)
else
printf("skipped\n");
+ printf("%-40s", "Testing vfixupimmpd $0,8(%edx){1to8},%zmm3,%zmm4...");
+ if ( stack_exec && cpu_has_avx512f )
+ {
+ decl_insn(vfixupimmpd);
+ static const struct {
+ double d[4];
+ }
+ src = { { -1, 0, 1, 2 } },
+ dst = { { 3, 4, 5, 6 } },
+ out = { { .5, -1, 90, 2 } };
+
+ asm volatile ( "vbroadcastf64x4 %1, %%zmm3\n\t"
+ "vbroadcastf64x4 %2, %%zmm4\n"
+ put_insn(vfixupimmpd,
+ "vfixupimmpd $0, 8(%0)%{1to8%}, %%zmm3,
%%zmm4")
+ :: "d" (NULL), "m" (src), "m" (dst) );
+
+ set_insn(vfixupimmpd);
+ /*
+ * Nibble (token) mapping (unused ones simply set to zero):
+ * 2 (ZERO) -> -1 (0x9)
+ * 3 (POS_ONE) -> 90 (0xc)
+ * 6 (NEG) -> 1/2 (0xb)
+ * 7 (POS) -> src (0x1)
+ */
+ res[2] = 0x1b00c900;
+ regs.edx = (unsigned long)res;
+ rc = x86_emulate(&ctxt, &emulops);
+ asm volatile ( "vmovupd %%zmm4, %0" : "=m" (res[0]) );
+ if ( rc != X86EMUL_OKAY || !check_eip(vfixupimmpd) ||
+ memcmp(res + 0, &out, sizeof(out)) ||
+ memcmp(res + 8, &out, sizeof(out)) )
+ goto fail;
+ printf("okay\n");
+ }
+ else
+ printf("skipped\n");
+
#undef decl_insn
#undef put_insn
#undef set_insn
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -459,7 +459,8 @@ static const struct ext0f38_table {
[0x26 ... 0x29] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x2a] = { .simd_size = simd_packed_int, .two_op = 1, .d8s = d8s_vl },
[0x2b] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
- [0x2c ... 0x2d] = { .simd_size = simd_packed_fp },
+ [0x2c] = { .simd_size = simd_packed_fp, .d8s = d8s_vl },
+ [0x2d] = { .simd_size = simd_packed_fp, .d8s = d8s_dq },
[0x2e ... 0x2f] = { .simd_size = simd_packed_fp, .to_mem = 1 },
[0x30] = { .simd_size = simd_other, .two_op = 1, .d8s = d8s_vl_by_2 },
[0x31] = { .simd_size = simd_other, .two_op = 1, .d8s = d8s_vl_by_4 },
@@ -470,6 +471,8 @@ static const struct ext0f38_table {
[0x36 ... 0x3f] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x40] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x41] = { .simd_size = simd_packed_int, .two_op = 1 },
+ [0x42] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
+ [0x43] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
[0x45 ... 0x47] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x4c] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
[0x4d] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
@@ -563,6 +566,8 @@ static const struct ext0f3a_table {
[0x22] = { .simd_size = simd_none, .d8s = d8s_dq64 },
[0x23] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
[0x25] = { .simd_size = simd_packed_int, .d8s = d8s_vl },
+ [0x26] = { .simd_size = simd_packed_fp, .two_op = 1, .d8s = d8s_vl },
+ [0x27] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
[0x30 ... 0x33] = { .simd_size = simd_other, .two_op = 1 },
[0x38] = { .simd_size = simd_128, .d8s = 4 },
[0x3a] = { .simd_size = simd_256, .d8s = d8s_vl_by_2 },
@@ -577,6 +582,8 @@ static const struct ext0f3a_table {
[0x48 ... 0x49] = { .simd_size = simd_packed_fp, .four_op = 1 },
[0x4a ... 0x4b] = { .simd_size = simd_packed_fp, .four_op = 1 },
[0x4c] = { .simd_size = simd_packed_int, .four_op = 1 },
+ [0x54] = { .simd_size = simd_packed_fp, .d8s = d8s_vl },
+ [0x55] = { .simd_size = simd_scalar_vexw, .d8s = d8s_dq },
[0x5c ... 0x5f] = { .simd_size = simd_packed_fp, .four_op = 1 },
[0x60 ... 0x63] = { .simd_size = simd_packed_int, .two_op = 1 },
[0x68 ... 0x69] = { .simd_size = simd_packed_fp, .four_op = 1 },
@@ -2675,6 +2682,10 @@ x86_decode_0f38(
ctxt->opcode |= MASK_INSR(vex.pfx, X86EMUL_OPC_PFX_MASK);
break;
+ case X86EMUL_OPC_EVEX_66(0, 0x2d): /* vscalefs{d,s} */
+ state->simd_size = simd_scalar_vexw;
+ break;
+
case X86EMUL_OPC_EVEX_66(0, 0x7a): /* vpbroadcastb */
case X86EMUL_OPC_EVEX_66(0, 0x7b): /* vpbroadcastw */
case X86EMUL_OPC_EVEX_66(0, 0x7c): /* vpbroadcast{d,q} */
@@ -9029,6 +9040,8 @@ x86_emulate(
host_and_vcpu_must_have(fma);
goto simd_0f_ymm;
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x2c): /* vscalefp{s,d}
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x42): /* vgetexpp{s,d}
[xyz]mm/mem,[xyz]mm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x96): /* vfmaddsub132p{s,d}
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x97): /* vfmsubadd132p{s,d}
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x98): /* vfmadd132p{s,d}
[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
@@ -9052,6 +9065,8 @@ x86_emulate(
avx512_vlen_check(false);
goto simd_zmm;
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x2d): /* vscalefs{s,d}
xmm/mem,xmm,xmm{k} */
+ case X86EMUL_OPC_EVEX_66(0x0f38, 0x43): /* vgetexps{s,d}
xmm/mem,xmm,xmm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x99): /* vfmadd132s{s,d}
xmm/mem,xmm,xmm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x9b): /* vfmsub132s{s,d}
xmm/mem,xmm,xmm{k} */
case X86EMUL_OPC_EVEX_66(0x0f38, 0x9d): /* vfnmadd132s{s,d}
xmm/mem,xmm,xmm{k} */
@@ -9614,6 +9629,23 @@ x86_emulate(
EXC_UD);
goto avx512f_imm8_no_sae;
+ case X86EMUL_OPC_EVEX_66(0x0f3a, 0x26): /* vgetmantp{s,d}
$imm8,[xyz]mm/mem,[xyz]mm{k} */
+ case X86EMUL_OPC_EVEX_66(0x0f3a, 0x54): /* vfixupimmp{s,d}
$imm8,[xyz]mm/mem,[xyz]mm,[xyz]mm{k} */
+ host_and_vcpu_must_have(avx512f);
+ if ( ea.type == OP_MEM || !evex.br )
+ avx512_vlen_check(false);
+ goto simd_imm8_zmm;
+
+ case X86EMUL_OPC_EVEX_66(0x0f3a, 0x27): /* vgetmants{s,d}
$imm8,xmm/mem,xmm,xmm{k} */
+ case X86EMUL_OPC_EVEX_66(0x0f3a, 0x55): /* vfixupimms{s,d}
$imm8,xmm/mem,xmm,xmm{k} */
+ host_and_vcpu_must_have(avx512f);
+ if ( ea.type == OP_MEM )
+ {
+ generate_exception_if(evex.br, EXC_UD);
+ avx512_vlen_check(true);
+ }
+ goto simd_imm8_zmm;
+
case X86EMUL_OPC_VEX_66(0x0f3a, 0x30): /* kshiftr{b,w} $imm8,k,k */
case X86EMUL_OPC_VEX_66(0x0f3a, 0x32): /* kshiftl{b,w} $imm8,k,k */
if ( !vex.w )
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