Re: [ANNOUNCE] CMOV emulation for 2.4.19-rc1

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On 30 June 2002 02:39, Willy TARREAU wrote:
> Hi all,
>
> OK, I know that many people dislike this, but I know others
> who occasionally need it anyway. So I don't post it for general
> inclusion, but for interested people.

+ if ((*eip == 0x0F) && ((*(eip+1) & 0xF0) == 0x40)) { /* CMOV* */
...
+ if ((*eip == 0x0F) && ((*(eip+1) & 0xF8) == 0xC8)) { /* BSWAP */
...
+ if ((*eip == 0x0F) && ((*(eip+1) & 0xFE) == 0xB0)) { /* CMPXCHG */
...
+ if ((*eip == 0x0F) && ((*(eip+1) & 0xFE) == 0xC0)) { /* XADD */

You may check for 0x0F only once:

        if(*eip!=0x0f) goto invalid_opcode;
        eip++;

--
vda
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