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<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US">Hi Roman,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US">in the mode you want to use the opcodes both immediate are defined as signed values.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Imm32 is defined in the range </span><span lang="EN-GB" style="font-size:10.5pt;color:black">−2.147.483.648 to 2.147.483.647<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;color:black">In your case 0x80000000 will interpreted by the assembler as the unsigned value
</span><span lang="EN-GB" style="font-size:10.5pt;color:black">2.147.483.648</span><span lang="EN-GB" style="font-size:10.5pt;color:black"> which is bigger than 2.147.483.647<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;color:black">If you want to assemble that specific Imm in hex representation then you have to assemble:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:10.5pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“add rax, 0x80000000” as “add rax, </span>
<span lang="EN-US">-2147483648</span><span lang="EN-US">”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:black">“add rax, 0xfffffffff” as “add rax, -1”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“imul rbx, rsi, 0x80000000” as “imul rbx, rsi, -2147483648”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“imul rbx, rsi, 0xffffffff” as “imul rbx, rsi, 0xffffffff”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Peter Garba</span><span lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US">From the Intel Manuel:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">ADD r/m64, imm32 MI Valid N.E. Add imm32 sign-extended to 64-bits to r/m64.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">IMUL—Signed Multiply:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">IMUL r32, r/m32, imm32 RMI Valid Valid doubleword register ← r/m32
</span><span lang="EN-GB" style="font-family:"Cambria Math",serif">∗</span><span lang="EN-GB"> immediate doubleword.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Rohleder, Roman (Contractor) via llvm-dev<br>
<b>Sent:</b> Donnerstag, 17. Dezember 2015 11:15<br>
<b>To:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> [llvm-dev] llvm-3.6 MCAsmParser x64 Error "invalid operand for instruction" when msb set<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am experiencing problems, when trying to assemble these two x86-64 Opcodes<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“add r64, imm32”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“imul r64, r64, imm32”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">When having the most significant bit set for imm32, for example:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“add rax, 0x80000000”, “add rax, 0xffffffff”, …<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">“imul rbx, rsi, 0x80000000”, “imul rbx, rsi, 0xffffffff”, …<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The Error Message I receive is the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">„Instruction:1:1: error: invalid operand for instruction“<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I was using the MCAsmParser, with the RelaxAll Flag set to true, for the MCStreamer.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Can someone clarify, as to why this is happening, or what I am missing?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thank you in advance.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Kind regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Roman<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:12.0pt;font-family:"Times New Roman",serif">
<hr size="3" width="100%" align="center">
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black">________________________________________________<br>
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