SynthMaker

find the hidden ASM opcodes!

Archive · 2009 4 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

infuzion ·

Messing around with SM, I found there are a few undocumented ASM opcodes available to us already: //andnps xmm1,xmm1; fld dword ptr[eax]; jg jl jng jnl movd eax,xmm2; //movd xmm2,eax; //movhlps xmm1,xmm2; //movhpd xmm1,xmm2; //movhps xmm1,xmm2; //movq xmm1,eax; or orps xmm1,xmm2; //known to work before, but undocumented pand xmm2,xmm1; pand xmm2,dword ebp; //pandn xmm2,xmm1; pslld xmm2,2; //=pslldq? Shift xmm2 left by 2 bytes while shifting in 0s. ret; shufps xmm2,xmm2,57; The opcodes that are commented out may work, but are mis-coloring. Please look for more (may need a brute-force to check), test to see if the opcodes are 100% functional, & update the WiKi if proven to work please. If they work, but do not color correctly, please state this, so we can post a mega-bug report. Some ASM docs listed here. Vote for SSE2,SSE3, & other opcodes on this thread: + SSE2=64bit audio, SSE3=faster FFT... please Happy opcode hunting, & best wishes!

edit02: shufps only works with 2 xmm addresses. + more opcodes

MyCo ·

undocumented assembler instructions

infuzion ·

MyCo wrote: [old link]

Thanks for the link! I missed that; it was when I was taking a SM break. So pslld, shufps, & pand are confirmed, anyone with anymore please?

infuzion ·

found a few more! If you can offer proof it works, go ahead & add it to the WiKi. Ensure to note that it works or not for variables also!

Wrote something here? To have a post removed or your name hidden, write to [email protected].

Before your first post

A few rules keep this a friendly place. You agree to them once.

Shown next to what you post, here and in the app. It doesn’t have to be your real name: 3–24 lower-case letters, digits or _ (capitals become lower case, spaces become _).

    Then your post goes up straight away.

    Delete this reply?

    Open it in SynthMaker?

    It goes on the track you’re editing there, in place of that track’s sound, and into My sounds. Your other tracks stay as they are.

    Want to keep that track’s sound? Start a new song in SynthMaker first (Song › New song), then open this.

    Report this reply?

    Only the developer reads reports. The person isn’t told who reported them.

    What’s wrong with it?

    Block this person?

    You won’t see their posts and replies here any more. They aren’t told, and you can unblock them at any time.

    People you’ve blocked

    Their posts and replies are hidden from you. Unblock someone to see them again.

    The community rules

    A few rules keep this a friendly place. Everyone agrees to them once, before their first post.