Modified: trunk/Source/WebCore/platform/audio/Biquad.cpp (110781 => 110782)
--- trunk/Source/WebCore/platform/audio/Biquad.cpp 2012-03-14 23:29:08 UTC (rev 110781)
+++ trunk/Source/WebCore/platform/audio/Biquad.cpp 2012-03-14 23:34:13 UTC (rev 110782)
@@ -96,60 +96,6 @@
double a1 = m_a1;
double a2 = m_a2;
-// Optimize the hot multiply-add by pipelining with SSE2 instructions.
-#ifdef __SSE2__
- double na1 = -a1;
- double na2 = -a2;
-
- __asm__(
- "movl %4, %%edx\n\t" // move sourceP to edx
- "movl %5, %%ecx\n\t" // move destP to ecx
- "movl %6, %%eax\n\t" // move n to eax
- "testl %%eax, %%eax\n\t"
- "je .LabelEnd\n\t"
- "movss (%%edx), %%xmm7\n\t" // load x to xmm7[63:0]
- "cvtss2sd %%xmm7, %%xmm1\n\t" // convert x from float to double
- "movlpd %1, %%xmm0\n\t" // move x2 to xmm0[63:0]
- "movlpd %9, %%xmm2\n\t" // move b2 to xmm2[63:0]
- "movlpd %7, %%xmm3\n\t" // move b0 to xmm3[63:0]
- "movhpd %0, %%xmm0\n\t" // move x1 to xmm0[127:64] ----> (x1 x2)
- "movhpd %3, %%xmm1\n\t" // move y2 to xmm1[127:64] ----> (y2 x )
- "movhpd %8, %%xmm2\n\t" // move b1 to xmm2[127:64] ----> (b1 b2)
- "movhpd %11, %%xmm3\n\t" // move a2 to xmm3[127:64] ----> (a2 b0)
- "movlpd %2, %%xmm4\n\t" // move y1 to xmm4[63:0]
- ".LabelLoop:\n\t"
- "addl $4, %%edx\n\t" // sourceP++
- "movapd %%xmm0, %%xmm5\n\t" // copy (x1 x2)
- "movapd %%xmm1, %%xmm6\n\t" // copy (y2 x )
- "shufpd $0, %%xmm4, %%xmm1\n\t" // y2=y1
- "mulpd %%xmm2, %%xmm5\n\t" // (x1*b1 x2*b2)
- "mulpd %%xmm3, %%xmm6\n\t" // (y2*a2 x *b0)
- "shufpd $1, %%xmm1, %%xmm0\n\t" // x2=x1 x1=x
- "mulsd %10, %%xmm4\n\t" // a1*y1
- "addpd %%xmm6, %%xmm5\n\t" // (x1*b1+y2*a2 x2*b2+x*b0)
- "subl $1, %%eax\n\t" // n--
- "movapd %%xmm5, %%xmm6\n\t"
- "movss (%%edx), %%xmm7\n\t" // load x
- "cvtss2sd %%xmm7, %%xmm1\n\t" // cvt x from float to double x = new x
- "addsd %%xmm4, %%xmm5\n\t" // a1*y1 + (x2*b2+x*b0)
- "shufpd $1, %%xmm6, %%xmm6\n\t" // (x1*b1+y2*a2 x2*b2+x*b0) -> (x2*b2+x*b0 x1*b1+y2*a2)
- "addsd %%xmm6, %%xmm5\n\t" // y
- "cvtsd2ss %%xmm5, %%xmm7\n\t"
- "movss %%xmm7, (%%ecx)\n\t" // y -> *destP
- "movapd %%xmm5, %%xmm4\n\t" // y1 = y
- "addl $4, %%ecx\n\t" // destP++
- "testl %%eax, %%eax\n\t"
- "jne .LabelLoop\n\t" // while()
- "movhpd %%xmm0, %0\n\t"
- "movlpd %%xmm0, %1\n\t"
- "movlpd %%xmm4, %2\n\t"
- "movhpd %%xmm1, %3\n\t"
- ".LabelEnd:\n\t"
- :"+m"(x1), "+m"(x2), "+m"(y1), "+m"(y2)
- :"m"(sourceP), "m"(destP), "m"(n), "m"(b0), "m"(b1), "m"(b2), "m"(na1), "m"(na2)
- :"eax", "edx", "ecx", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7"
- );
-#else
while (n--) {
// FIXME: this can be optimized by pipelining the multiply adds...
float x = *sourceP++;
@@ -163,7 +109,6 @@
y2 = y1;
y1 = y;
}
-#endif
// Local variables back to member. Flush denormals here so we
// don't slow down the inner loop above.
