emit_x64_vector_saturation: AVX implementation of EmitVectorUnsignedSaturatedAdd32
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1 changed files with 39 additions and 30 deletions
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@ -222,45 +222,54 @@ void EmitX64::EmitVectorUnsignedSaturatedAdd16(EmitContext& ctx, IR::Inst* inst)
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void EmitX64::EmitVectorUnsignedSaturatedAdd32(EmitContext& ctx, IR::Inst* inst) {
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auto args = ctx.reg_alloc.GetArgumentInfo(inst);
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const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
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const Xbyak::Xmm addend = ctx.reg_alloc.UseXmm(args[1]);
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const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
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// TODO AVX2
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if (code.HasHostFeature(HostFeature::AVX512_Ortho | HostFeature::AVX512DQ)) {
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// Do a regular unsigned addition
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code.vpaddd(result, result, addend);
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const Xbyak::Xmm operand1 = ctx.reg_alloc.UseXmm(args[0]);
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const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
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const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
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const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
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// Test if an overflow happened
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code.vpcmpud(k1, result, addend, CmpInt::LessThan);
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// Write 0b1111... where overflows have happened
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// This is just a quick way to do this without touching memory
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code.vpaddd(result, operand1, operand2);
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code.vpcmpud(k1, result, operand2, CmpInt::LessThan);
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code.vpternlogd(result | k1, result, result, 0xFF);
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// Set ZF if an overflow happened
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code.ktestb(k1, k1);
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code.setnz(overflow);
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code.or_(code.byte[code.r15 + code.GetJitStateInfo().offsetof_fpsr_qc], overflow);
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ctx.reg_alloc.DefineValue(inst, result);
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return;
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}
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const Xbyak::Xmm operand1 = code.HasHostFeature(HostFeature::AVX) ? ctx.reg_alloc.UseXmm(args[0]) : ctx.reg_alloc.UseScratchXmm(args[0]);
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const Xbyak::Xmm operand2 = ctx.reg_alloc.UseXmm(args[1]);
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const Xbyak::Xmm result = code.HasHostFeature(HostFeature::AVX) ? ctx.reg_alloc.ScratchXmm() : operand1;
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const Xbyak::Reg8 overflow = ctx.reg_alloc.ScratchGpr().cvt8();
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const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
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if (code.HasHostFeature(HostFeature::AVX)) {
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code.vpxor(xmm0, operand1, operand2);
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code.vpand(tmp, operand1, operand2);
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code.vpaddd(result, operand1, operand2);
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} else {
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const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
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code.movaps(tmp, result);
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code.movaps(xmm0, result);
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code.movaps(tmp, operand1);
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code.movaps(xmm0, operand1);
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code.pxor(xmm0, addend);
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code.pand(tmp, addend);
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code.paddd(result, addend);
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code.pxor(xmm0, operand2);
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code.pand(tmp, operand2);
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code.paddd(result, operand2);
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}
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code.psrld(xmm0, 1);
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code.paddd(tmp, xmm0);
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code.psrad(tmp, 31);
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code.psrld(xmm0, 1);
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code.paddd(tmp, xmm0);
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code.psrad(tmp, 31);
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code.por(result, tmp);
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code.por(result, tmp);
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if (code.HasHostFeature(HostFeature::SSE41)) {
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code.ptest(tmp, tmp);
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} else {
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code.movmskps(overflow.cvt32(), tmp);
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code.test(overflow.cvt32(), overflow.cvt32());
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}
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if (code.HasHostFeature(HostFeature::SSE41)) {
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code.ptest(tmp, tmp);
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} else {
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code.movmskps(overflow.cvt32(), tmp);
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code.test(overflow.cvt32(), overflow.cvt32());
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}
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code.setnz(overflow);
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