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emit_x64_data_processing: Exclude edge case from lea path in EmitSub

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-0xffff'ffff'8000'0000 = 0x0000'0000'8000'0000 which is not a representable displacement
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Merry 2024-01-31 01:41:25 +00:00
parent 24bf921ff9
commit 75235ffedb
1 changed files with 1 additions and 1 deletions
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src/dynarmic/backend/x64/emit_x64_data_processing.cpp
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@ -1014,7 +1014,7 @@ static void EmitSub(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, int bit
const bool is_cmp = inst->UseCount() == size_t(!!carry_inst + !!overflow_inst + !!nzcv_inst) && carry_in.IsImmediate() && carry_in.GetImmediateU1(); const bool is_cmp = inst->UseCount() == size_t(!!carry_inst + !!overflow_inst + !!nzcv_inst) && carry_in.IsImmediate() && carry_in.GetImmediateU1();
// Consider using LEA. // Consider using LEA.
if (!carry_inst && !overflow_inst && !nzcv_inst && carry_in.IsImmediate() && carry_in.GetImmediateU1() && args[1].IsImmediate() && args[1].FitsInImmediateS32()) { if (!carry_inst && !overflow_inst && !nzcv_inst && carry_in.IsImmediate() && carry_in.GetImmediateU1() && args[1].IsImmediate() && args[1].FitsInImmediateS32() && args[1].GetImmediateS32() != 0xffff'ffff'8000'0000) {
const Xbyak::Reg op1 = ctx.reg_alloc.UseGpr(args[0]).changeBit(bitsize); const Xbyak::Reg op1 = ctx.reg_alloc.UseGpr(args[0]).changeBit(bitsize);
const Xbyak::Reg result = ctx.reg_alloc.ScratchGpr().changeBit(bitsize); const Xbyak::Reg result = ctx.reg_alloc.ScratchGpr().changeBit(bitsize);