Re: [linux-audio-dev] [i686] xmm regs + gcc inline assembly

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Subject: Re: [linux-audio-dev] [i686] xmm regs + gcc inline assembly
From: Tim Goetze (tim_AT_quitte.de)
Date: Sat Feb 14 2004 - 13:57:19 EET

>when i look into the code in question the next time (it works well now
>so not much incentive), i'll probably do a complete assembler rewrite.
>no more messing with my pointers, mr. gcc, thanks.

fwiw,

  float * t = &four_floats_somewhere_on_a_128_bit_boundary;

  asm ("
            movl %0, %%eax
            movaps %%xmm4, (%%eax)
            flds (%%eax)
            fadds 4(%%eax)
            fadds 8(%%eax)
            fadds 12(%%eax)
            fstps (%%eax)" : : "p" (t) : "%eax", "%st");

sums xmm4 into t[0].

tim

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