From 13e8b7b51631de66a6ad7c56fa96a36646aa37ef Mon Sep 17 00:00:00 2001 From: MerryMage Date: Sun, 24 Mar 2019 15:42:14 +0000 Subject: [PATCH] emit_x64_floating_point: F16C implementation of FPSingleToHalf --- src/backend/x64/emit_x64_floating_point.cpp | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/src/backend/x64/emit_x64_floating_point.cpp b/src/backend/x64/emit_x64_floating_point.cpp index e4d97e86..5df30955 100644 --- a/src/backend/x64/emit_x64_floating_point.cpp +++ b/src/backend/x64/emit_x64_floating_point.cpp @@ -1133,8 +1133,19 @@ void EmitX64::EmitFPSingleToDouble(EmitContext& ctx, IR::Inst* inst) { void EmitX64::EmitFPSingleToHalf(EmitContext& ctx, IR::Inst* inst) { auto args = ctx.reg_alloc.GetArgumentInfo(inst); const auto rounding_mode = static_cast(args[1].GetImmediateU8()); + const auto round_imm = ConvertRoundingModeToX64Immediate(rounding_mode); - // TODO: F16C implementation requires ForceToDefaultNaN<16> to be implemented. + if (code.DoesCpuSupport(Xbyak::util::Cpu::tF16C) && !ctx.FPCR().AHP() && !ctx.FPCR().FZ16()) { + const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]); + + if (ctx.FPCR().DN()) { + ForceToDefaultNaN<32>(code, result); + } + code.vcvtps2ph(result, result, static_cast(*round_imm)); + + ctx.reg_alloc.DefineValue(inst, result); + return; + } ctx.reg_alloc.HostCall(inst, args[0]); code.mov(code.ABI_PARAM2.cvt32(), ctx.FPCR().Value());