ref: 0e6554d897d63214243cdf11db52f01e985420a0
parent: 7d9f87f6814836eab130bfe340828ec84d16f329
author: lenox <lenox>
date: Thu Mar 2 14:19:05 EST 2000
new quantizer code for other than VC and BCB compilers
--- a/aac_qc.c
+++ b/aac_qc.c
@@ -119,7 +119,7 @@
{const double istep = pow(2.0, -0.1875*quantInfo->common_scalefac);
-#if ((defined _MSC_VER) || (defined __BORLAND__))
+#if ((defined _MSC_VER) || (defined __BORLANDC__))
{/* asm from Acy Stapp <AStapp@austin.rr.com> */
int rx[4];
@@ -188,7 +188,7 @@
fstp st(0)
}
}
-#else
+#elif 0
{double x;
int j, rx;
@@ -210,6 +210,49 @@
XRPOW_FTOI(x + QUANTFAC(rx), *quant++);
}
}
+#else
+ {/* from Wilfried.Behne@t-online.de. Reported to be 2x faster than+ the above code (when not using ASM) on PowerPC */
+ int j;
+
+ for ( j = 1024/8; j > 0; --j)
+ {+ double x1, x2, x3, x4, x5, x6, x7, x8;
+ int rx1, rx2, rx3, rx4, rx5, rx6, rx7, rx8;
+ x1 = *pow_spectrum++ * istep;
+ x2 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x1, rx1);
+ x3 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x2, rx2);
+ x4 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x3, rx3);
+ x5 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x4, rx4);
+ x6 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x5, rx5);
+ x7 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x6, rx6);
+ x8 = *pow_spectrum++ * istep;
+ XRPOW_FTOI(x7, rx7);
+ x1 += QUANTFAC(rx1);
+ XRPOW_FTOI(x8, rx8);
+ x2 += QUANTFAC(rx2);
+ XRPOW_FTOI(x1,*quant++);
+ x3 += QUANTFAC(rx3);
+ XRPOW_FTOI(x2,*quant++);
+ x4 += QUANTFAC(rx4);
+ XRPOW_FTOI(x3,*quant++);
+ x5 += QUANTFAC(rx5);
+ XRPOW_FTOI(x4,*quant++);
+ x6 += QUANTFAC(rx6);
+ XRPOW_FTOI(x5,*quant++);
+ x7 += QUANTFAC(rx7);
+ XRPOW_FTOI(x6,*quant++);
+ x8 += QUANTFAC(rx8);
+ XRPOW_FTOI(x7,*quant++);
+ XRPOW_FTOI(x8,*quant++);
+ }
+ }
#endif
}