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Implement simd_builder for x86
ASMJIT-based tool for building vectorized loops (such as ones in BufferUtils.cpp)
This commit is contained in:
Nekotekina
Ivan
parent
698c3415ea
commit
e28707055b
5 changed files with 740 additions and 387 deletions
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@ -7,6 +7,7 @@
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#include "mutex.h"
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#include "util/vm.hpp"
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#include "util/asm.hpp"
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#include "util/v128.hpp"
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#include <charconv>
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#include <zlib.h>
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@ -351,6 +352,424 @@ asmjit::inline_runtime::~inline_runtime()
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utils::memory_protect(m_data, m_size, utils::protection::rx);
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}
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#if defined(ARCH_X64)
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asmjit::simd_builder::simd_builder(CodeHolder* ch) noexcept
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: native_asm(ch)
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{
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_init(true);
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}
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void asmjit::simd_builder::_init(bool full)
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{
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if (full && utils::has_avx512_icl())
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{
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v0 = x86::zmm0;
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v1 = x86::zmm1;
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v2 = x86::zmm2;
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v3 = x86::zmm3;
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v4 = x86::zmm4;
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v5 = x86::zmm5;
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vsize = 64;
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}
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else if (full && utils::has_avx2())
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{
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v0 = x86::ymm0;
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v1 = x86::ymm1;
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v2 = x86::ymm2;
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v3 = x86::ymm3;
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v4 = x86::ymm4;
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v5 = x86::ymm5;
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vsize = 32;
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}
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else
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{
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v0 = x86::xmm0;
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v1 = x86::xmm1;
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v2 = x86::xmm2;
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v3 = x86::xmm3;
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v4 = x86::xmm4;
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v5 = x86::xmm5;
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vsize = 16;
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}
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if (full && utils::has_avx512())
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{
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vmask = -1;
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}
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else
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{
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vmask = 0;
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}
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}
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void asmjit::simd_builder::vec_cleanup_ret()
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{
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if (utils::has_avx() && vsize > 16)
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this->vzeroupper();
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this->ret();
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}
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void asmjit::simd_builder::vec_set_all_zeros(const Operand& v)
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{
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x86::Xmm reg(v.id());
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if (utils::has_avx())
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this->vpxor(reg, reg, reg);
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else
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this->xorps(reg, reg);
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}
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void asmjit::simd_builder::vec_set_all_ones(const Operand& v)
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{
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x86::Xmm reg(v.id());
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if (x86::Zmm zr(v.id()); zr == v)
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this->vpternlogd(zr, zr, zr, 0xff);
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else if (x86::Ymm yr(v.id()); yr == v)
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this->vpcmpeqd(yr, yr, yr);
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else if (utils::has_avx())
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this->vpcmpeqd(reg, reg, reg);
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else
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this->pcmpeqd(reg, reg);
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}
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void asmjit::simd_builder::vec_set_const(const Operand& v, const v128& val)
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{
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if (!val._u)
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return vec_set_all_zeros(v);
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if (!~val._u)
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return vec_set_all_ones(v);
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if (uptr(&val) < 0x8000'0000)
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{
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// Assume the constant comes from a code or data segment (unsafe)
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if (x86::Zmm zr(v.id()); zr == v)
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this->vbroadcasti32x4(zr, x86::oword_ptr(uptr(&val)));
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else if (x86::Ymm yr(v.id()); yr == v)
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this->vbroadcasti128(yr, x86::oword_ptr(uptr(&val)));
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else if (utils::has_avx())
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this->vmovaps(x86::Xmm(v.id()), x86::oword_ptr(uptr(&val)));
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else
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this->movaps(x86::Xmm(v.id()), x86::oword_ptr(uptr(&val)));
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}
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else
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{
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// TODO
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fmt::throw_exception("Unexpected constant location");
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}
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}
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void asmjit::simd_builder::vec_clobbering_test(u32 esize, const Operand& v, const Operand& rhs)
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{
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if (esize == 64)
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{
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this->emit(x86::Inst::kIdVptestmd, x86::k0, v, rhs);
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this->ktestw(x86::k0, x86::k0);
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}
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else if (esize == 32)
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{
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this->emit(x86::Inst::kIdVptest, v, rhs);
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}
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else if (esize == 16 && utils::has_sse41())
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{
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this->emit(x86::Inst::kIdPtest, v, rhs);
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}
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else
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{
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if (v != rhs)
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this->emit(x86::Inst::kIdPand, v, rhs);
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if (esize == 16)
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this->emit(x86::Inst::kIdPacksswb, v, v);
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this->emit(x86::Inst::kIdMovq, x86::rax, v);
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if (esize == 16 || esize == 8)
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this->test(x86::rax, x86::rax);
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else if (esize == 4)
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this->test(x86::eax, x86::eax);
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else if (esize == 2)
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this->test(x86::ax, x86::ax);
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else if (esize == 1)
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this->test(x86::al, x86::al);
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else
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fmt::throw_exception("Unimplemented");
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}
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}
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asmjit::x86::Mem asmjit::simd_builder::ptr_scale_for_vec(u32 esize, const x86::Gp& base, const x86::Gp& index)
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{
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switch (ensure(esize))
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{
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case 1: return x86::ptr(base, index, 0, 0);
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case 2: return x86::ptr(base, index, 1, 0);
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case 4: return x86::ptr(base, index, 2, 0);
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case 8: return x86::ptr(base, index, 3, 0);
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default: fmt::throw_exception("Bad esize");
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}
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}
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void asmjit::simd_builder::vec_load_unaligned(u32 esize, const Operand& v, const x86::Mem& src)
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{
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ensure(std::has_single_bit(esize));
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ensure(std::has_single_bit(vsize));
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if (esize == 2)
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{
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ensure(vsize >= 2);
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if (vsize == 2)
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vec_set_all_zeros(v);
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if (vsize == 2 && utils::has_avx())
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this->emit(x86::Inst::kIdVpinsrw, x86::Xmm(v.id()), x86::Xmm(v.id()), src, Imm(0));
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else if (vsize == 2)
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this->emit(x86::Inst::kIdPinsrw, v, src, Imm(0));
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else if (vmask && vmask < 8)
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this->emit(x86::Inst::kIdVmovdqu16, v, src);
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else
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return vec_load_unaligned(vsize, v, src);
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}
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else if (esize == 4)
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{
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ensure(vsize >= 4);
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if (vsize == 4 && utils::has_avx())
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this->emit(x86::Inst::kIdVmovd, x86::Xmm(v.id()), src);
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else if (vsize == 4)
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this->emit(x86::Inst::kIdMovd, v, src);
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else if (vmask && vmask < 8)
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this->emit(x86::Inst::kIdVmovdqu32, v, src);
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else
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return vec_load_unaligned(vsize, v, src);
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}
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else if (esize == 8)
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{
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ensure(vsize >= 8);
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if (vsize == 8 && utils::has_avx())
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this->emit(x86::Inst::kIdVmovq, x86::Xmm(v.id()), src);
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else if (vsize == 8)
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this->emit(x86::Inst::kIdMovq, v, src);
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else if (vmask && vmask < 8)
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this->emit(x86::Inst::kIdVmovdqu64, v, src);
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else
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return vec_load_unaligned(vsize, v, src);
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}
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else if (esize >= 16)
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{
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ensure(vsize >= 16);
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if (utils::has_avx())
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this->emit(x86::Inst::kIdVmovdqu, v, src);
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else
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this->emit(x86::Inst::kIdMovups, v, src);
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}
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else
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{
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fmt::throw_exception("Unimplemented");
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}
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}
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void asmjit::simd_builder::vec_store_unaligned(u32 esize, const Operand& v, const x86::Mem& dst)
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{
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ensure(std::has_single_bit(esize));
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ensure(std::has_single_bit(vsize));
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if (esize == 2)
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{
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ensure(vsize >= 2);
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if (vsize == 2 && utils::has_avx())
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this->emit(x86::Inst::kIdVpextrw, dst, x86::Xmm(v.id()), Imm(0));
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else if (vsize == 2 && utils::has_sse41())
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this->emit(x86::Inst::kIdPextrw, dst, v, Imm(0));
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else if (vsize == 2)
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this->push(x86::rax), this->pextrw(x86::eax, x86::Xmm(v.id()), 0), this->mov(dst, x86::ax), this->pop(x86::rax);
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else if ((vmask && vmask < 8) || vsize >= 64)
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this->emit(x86::Inst::kIdVmovdqu16, dst, v);
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else
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return vec_store_unaligned(vsize, v, dst);
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}
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else if (esize == 4)
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{
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ensure(vsize >= 4);
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if (vsize == 4 && utils::has_avx())
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this->emit(x86::Inst::kIdVmovd, dst, x86::Xmm(v.id()));
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else if (vsize == 4)
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this->emit(x86::Inst::kIdMovd, dst, v);
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else if ((vmask && vmask < 8) || vsize >= 64)
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this->emit(x86::Inst::kIdVmovdqu32, dst, v);
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else
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return vec_store_unaligned(vsize, v, dst);
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}
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else if (esize == 8)
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{
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ensure(vsize >= 8);
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if (vsize == 8 && utils::has_avx())
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this->emit(x86::Inst::kIdVmovq, dst, x86::Xmm(v.id()));
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else if (vsize == 8)
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this->emit(x86::Inst::kIdMovq, dst, v);
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else if ((vmask && vmask < 8) || vsize >= 64)
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this->emit(x86::Inst::kIdVmovdqu64, dst, v);
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else
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return vec_store_unaligned(vsize, v, dst);
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}
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else if (esize >= 16)
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{
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ensure(vsize >= 16);
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if ((vmask && vmask < 8) || vsize >= 64)
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this->emit(x86::Inst::kIdVmovdqu64, dst, v); // Not really needed
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else if (utils::has_avx())
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this->emit(x86::Inst::kIdVmovdqu, dst, v);
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else
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this->emit(x86::Inst::kIdMovups, dst, v);
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}
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else
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{
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fmt::throw_exception("Unimplemented");
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}
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}
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void asmjit::simd_builder::_vec_binary_op(x86::Inst::Id sse_op, x86::Inst::Id vex_op, x86::Inst::Id evex_op, const Operand& dst, const Operand& lhs, const Operand& rhs)
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{
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if (utils::has_avx())
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{
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if (vex_op == x86::Inst::kIdNone || this->_extraReg.isReg())
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{
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this->evex().emit(evex_op, dst, lhs, rhs);
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}
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else
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{
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this->emit(vex_op, dst, lhs, rhs);
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}
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}
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else if (dst == lhs)
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{
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this->emit(sse_op, dst, rhs);
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}
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else if (dst == rhs)
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{
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fmt::throw_exception("Unimplemented");
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}
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else
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{
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this->emit(x86::Inst::kIdMovaps, dst, lhs);
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this->emit(sse_op, dst, rhs);
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}
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}
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void asmjit::simd_builder::vec_umin(u32 esize, const Operand& dst, const Operand& lhs, const Operand& rhs)
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{
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using enum x86::Inst::Id;
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if (esize == 2)
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{
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if (utils::has_sse41())
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return _vec_binary_op(kIdPminuw, kIdVpminuw, kIdVpminuw, dst, lhs, rhs);
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}
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else if (esize == 4)
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{
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if (utils::has_sse41())
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return _vec_binary_op(kIdPminud, kIdVpminud, kIdVpminud, dst, lhs, rhs);
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}
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fmt::throw_exception("Unimplemented");
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}
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void asmjit::simd_builder::vec_umax(u32 esize, const Operand& dst, const Operand& lhs, const Operand& rhs)
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{
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using enum x86::Inst::Id;
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if (esize == 2)
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{
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if (utils::has_sse41())
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return _vec_binary_op(kIdPmaxuw, kIdVpmaxuw, kIdVpmaxuw, dst, lhs, rhs);
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}
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else if (esize == 4)
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{
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if (utils::has_sse41())
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return _vec_binary_op(kIdPmaxud, kIdVpmaxud, kIdVpmaxud, dst, lhs, rhs);
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}
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fmt::throw_exception("Unimplemented");
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}
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void asmjit::simd_builder::vec_umin_horizontal_i128(u32 esize, const x86::Gp& dst, const Operand& src, const Operand& tmp)
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{
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using enum x86::Inst::Id;
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if (!utils::has_sse41())
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{
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fmt::throw_exception("Unimplemented");
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}
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ensure(src != tmp);
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if (esize == 2)
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{
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this->emit(utils::has_avx() ? kIdVphminposuw : kIdPhminposuw, x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->emit(utils::has_avx() ? kIdVpextrw : kIdPextrw, dst, x86::Xmm(tmp.id()), Imm(0));
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}
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else if (esize == 4)
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{
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if (utils::has_avx())
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{
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this->vpsrldq(x86::Xmm(tmp.id()), x86::Xmm(src.id()), 8);
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this->vpminud(x86::Xmm(tmp.id()), x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->vpsrldq(x86::Xmm(src.id()), x86::Xmm(tmp.id()), 4);
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this->vpminud(x86::Xmm(src.id()), x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->vmovd(dst.r32(), x86::Xmm(src.id()));
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}
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else
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{
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this->movdqa(x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->psrldq(x86::Xmm(tmp.id()), 8);
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this->pminud(x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->movdqa(x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->psrldq(x86::Xmm(src.id()), 4);
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this->pminud(x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->movd(dst.r32(), x86::Xmm(src.id()));
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}
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}
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else
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{
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fmt::throw_exception("Unimplemented");
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}
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}
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void asmjit::simd_builder::vec_umax_horizontal_i128(u32 esize, const x86::Gp& dst, const Operand& src, const Operand& tmp)
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{
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using enum x86::Inst::Id;
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if (!utils::has_sse41())
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{
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fmt::throw_exception("Unimplemented");
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}
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ensure(src != tmp);
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if (esize == 2)
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{
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vec_set_all_ones(x86::Xmm(tmp.id()));
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vec_xor(esize, x86::Xmm(tmp.id()), x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->emit(utils::has_avx() ? kIdVphminposuw : kIdPhminposuw, x86::Xmm(tmp.id()), x86::Xmm(tmp.id()));
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this->emit(utils::has_avx() ? kIdVpextrw : kIdPextrw, dst, x86::Xmm(tmp.id()), Imm(0));
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this->not_(dst.r16());
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}
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else if (esize == 4)
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{
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if (utils::has_avx())
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{
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this->vpsrldq(x86::Xmm(tmp.id()), x86::Xmm(src.id()), 8);
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this->vpmaxud(x86::Xmm(tmp.id()), x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->vpsrldq(x86::Xmm(src.id()), x86::Xmm(tmp.id()), 4);
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this->vpmaxud(x86::Xmm(src.id()), x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->vmovd(dst.r32(), x86::Xmm(src.id()));
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}
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else
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{
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this->movdqa(x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->psrldq(x86::Xmm(tmp.id()), 8);
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this->pmaxud(x86::Xmm(tmp.id()), x86::Xmm(src.id()));
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this->movdqa(x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->psrldq(x86::Xmm(src.id()), 4);
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this->pmaxud(x86::Xmm(src.id()), x86::Xmm(tmp.id()));
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this->movd(dst.r32(), x86::Xmm(src.id()));
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
fmt::throw_exception("Unimplemented");
|
||||
}
|
||||
}
|
||||
#endif /* X86 */
|
||||
|
||||
#ifdef LLVM_AVAILABLE
|
||||
|
||||
#include <unordered_map>
|
||||
|
|
|
|||
179
Utilities/JIT.h
179
Utilities/JIT.h
|
|
@ -51,6 +51,8 @@ using native_asm = asmjit::a64::Assembler;
|
|||
using native_args = std::array<asmjit::a64::Gp, 4>;
|
||||
#endif
|
||||
|
||||
union v128;
|
||||
|
||||
void jit_announce(uptr func, usz size, std::string_view name);
|
||||
|
||||
void jit_announce(auto* func, usz size, std::string_view name)
|
||||
|
|
@ -211,40 +213,132 @@ namespace asmjit
|
|||
}
|
||||
|
||||
#if defined(ARCH_X64)
|
||||
template <uint Size>
|
||||
struct native_vec;
|
||||
|
||||
template <>
|
||||
struct native_vec<16> { using type = x86::Xmm; };
|
||||
|
||||
template <>
|
||||
struct native_vec<32> { using type = x86::Ymm; };
|
||||
|
||||
template <>
|
||||
struct native_vec<64> { using type = x86::Zmm; };
|
||||
|
||||
template <uint Size>
|
||||
using native_vec_t = typename native_vec<Size>::type;
|
||||
|
||||
// if (count > step) { for (; ctr < (count - step); ctr += step) {...} count -= ctr; }
|
||||
inline void build_incomplete_loop(native_asm& c, auto ctr, auto count, u32 step, auto&& build)
|
||||
struct simd_builder : native_asm
|
||||
{
|
||||
asmjit::Label body = c.newLabel();
|
||||
asmjit::Label exit = c.newLabel();
|
||||
Operand v0, v1, v2, v3, v4, v5;
|
||||
|
||||
ensure((step & (step - 1)) == 0);
|
||||
c.cmp(count, step);
|
||||
c.jbe(exit);
|
||||
c.sub(count, step);
|
||||
c.align(asmjit::AlignMode::kCode, 16);
|
||||
c.bind(body);
|
||||
build();
|
||||
c.add(ctr, step);
|
||||
c.sub(count, step);
|
||||
c.ja(body);
|
||||
c.add(count, step);
|
||||
c.bind(exit);
|
||||
}
|
||||
uint vsize = 16;
|
||||
uint vmask = 0;
|
||||
|
||||
simd_builder(CodeHolder* ch) noexcept;
|
||||
|
||||
void _init(bool full);
|
||||
void vec_cleanup_ret();
|
||||
void vec_set_all_zeros(const Operand& v);
|
||||
void vec_set_all_ones(const Operand& v);
|
||||
void vec_set_const(const Operand& v, const v128& value);
|
||||
void vec_clobbering_test(u32 esize, const Operand& v, const Operand& rhs);
|
||||
|
||||
// return x86::ptr(base, ctr, X, 0) where X is set for esize accordingly
|
||||
x86::Mem ptr_scale_for_vec(u32 esize, const x86::Gp& base, const x86::Gp& index);
|
||||
|
||||
void vec_load_unaligned(u32 esize, const Operand& v, const x86::Mem& src);
|
||||
void vec_store_unaligned(u32 esize, const Operand& v, const x86::Mem& dst);
|
||||
void vec_partial_move(u32 esize, const Operand& dst, const Operand& src);
|
||||
|
||||
void _vec_binary_op(x86::Inst::Id sse_op, x86::Inst::Id vex_op, x86::Inst::Id evex_op, const Operand& dst, const Operand& lhs, const Operand& rhs);
|
||||
|
||||
void vec_shuffle_xi8(const Operand& dst, const Operand& lhs, const Operand& rhs)
|
||||
{
|
||||
using enum x86::Inst::Id;
|
||||
_vec_binary_op(kIdPshufb, kIdVpshufb, kIdVpshufb, dst, lhs, rhs);
|
||||
}
|
||||
|
||||
void vec_xor(u32, const Operand& dst, const Operand& lhs, const Operand& rhs)
|
||||
{
|
||||
using enum x86::Inst::Id;
|
||||
_vec_binary_op(kIdPxor, kIdVpxor, kIdVpxord, dst, lhs, rhs);
|
||||
}
|
||||
|
||||
void vec_or(u32, const Operand& dst, const Operand& lhs, const Operand& rhs)
|
||||
{
|
||||
using enum x86::Inst::Id;
|
||||
_vec_binary_op(kIdPor, kIdVpor, kIdVpord, dst, lhs, rhs);
|
||||
}
|
||||
|
||||
void vec_umin(u32 esize, const Operand& dst, const Operand& lhs, const Operand& rhs);
|
||||
void vec_umax(u32 esize, const Operand& dst, const Operand& lhs, const Operand& rhs);
|
||||
|
||||
void vec_umin_horizontal_i128(u32 esize, const x86::Gp& dst, const Operand& src, const Operand& tmp);
|
||||
void vec_umax_horizontal_i128(u32 esize, const x86::Gp& dst, const Operand& src, const Operand& tmp);
|
||||
|
||||
simd_builder& keep_if_not_masked()
|
||||
{
|
||||
if (vmask && vmask < 8)
|
||||
{
|
||||
this->k(x86::KReg(vmask));
|
||||
}
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
simd_builder& zero_if_not_masked()
|
||||
{
|
||||
if (vmask && vmask < 8)
|
||||
{
|
||||
this->k(x86::KReg(vmask));
|
||||
this->z();
|
||||
}
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
void build_loop(u32 esize, auto reg_ctr, auto reg_cnt, auto&& build, auto&& reduce)
|
||||
{
|
||||
ensure((esize & (esize - 1)) == 0);
|
||||
ensure(esize <= vsize);
|
||||
|
||||
Label body = this->newLabel();
|
||||
Label next = this->newLabel();
|
||||
Label exit = this->newLabel();
|
||||
|
||||
const u32 step = vsize / esize;
|
||||
|
||||
this->xor_(reg_ctr.r32(), reg_ctr.r32()); // Reset counter reg
|
||||
this->sub(reg_cnt, step);
|
||||
this->jb(next); // If count < step, skip main loop body
|
||||
this->align(AlignMode::kCode, 16);
|
||||
this->bind(body);
|
||||
build();
|
||||
this->add(reg_ctr, step);
|
||||
this->sub(reg_cnt, step);
|
||||
this->ja(body);
|
||||
this->bind(next);
|
||||
if (!vmask)
|
||||
reduce();
|
||||
this->add(reg_cnt, step);
|
||||
this->jz(exit);
|
||||
|
||||
if (vmask)
|
||||
{
|
||||
// Build single last iteration (masked)
|
||||
static constexpr u64 all_ones = -1;
|
||||
this->bzhi(reg_cnt, x86::Mem(uptr(&all_ones)), reg_cnt);
|
||||
this->kmovq(x86::k7, reg_cnt);
|
||||
vmask = 7;
|
||||
build();
|
||||
vmask = -1;
|
||||
reduce();
|
||||
}
|
||||
else
|
||||
{
|
||||
// Build tail loop (reduced vector width)
|
||||
Label body = this->newLabel();
|
||||
this->align(AlignMode::kCode, 16);
|
||||
this->bind(body);
|
||||
const uint vsz = vsize / step;
|
||||
this->_init(false);
|
||||
vsize = vsz;
|
||||
build();
|
||||
this->_init(true);
|
||||
this->inc(reg_ctr);
|
||||
this->sub(reg_cnt, 1);
|
||||
this->ja(body);
|
||||
}
|
||||
|
||||
this->bind(exit);
|
||||
}
|
||||
};
|
||||
|
||||
// for (; count > 0; ctr++, count--)
|
||||
inline void build_loop(native_asm& c, auto ctr, auto count, auto&& build)
|
||||
|
|
@ -262,6 +356,27 @@ namespace asmjit
|
|||
c.ja(body);
|
||||
c.bind(exit);
|
||||
}
|
||||
|
||||
inline void maybe_flush_lbr(native_asm& c, uint count = 2)
|
||||
{
|
||||
// Workaround for bad LBR callstacks which happen in some situations (mainly TSX) - execute additional RETs
|
||||
Label next = c.newLabel();
|
||||
c.lea(x86::rcx, x86::qword_ptr(next));
|
||||
|
||||
for (u32 i = 0; i < count; i++)
|
||||
{
|
||||
c.push(x86::rcx);
|
||||
c.sub(x86::rcx, 16);
|
||||
}
|
||||
|
||||
for (u32 i = 0; i < count; i++)
|
||||
{
|
||||
c.ret();
|
||||
c.align(asmjit::AlignMode::kCode, 16);
|
||||
}
|
||||
|
||||
c.bind(next);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue