Apply HRTF coefficient stepping separately

1 files changed, 7 insertions, 53 deletions

diff --git a/Alc/mixer_sse.c b/Alc/mixer_sse.c
index 56a4bdae..719ebd23 100644
--- a/Alc/mixer_sse.c
+++ b/Alc/mixer_sse.c
@@ -21,65 +21,19 @@
 #include "mixer_defs.h"
 
 
-static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
-                                   const ALuint IrSize,
+static inline void ApplyCoeffsStep(const ALuint IrSize,
                                    ALfloat (*restrict Coeffs)[2],
-                                   const ALfloat (*restrict CoeffStep)[2],
-                                   ALfloat left, ALfloat right)
+                                   const ALfloat (*restrict CoeffStep)[2])
 {
-    const __m128 lrlr = { left, right, left, right };
-    __m128 coeffs, deltas, imp0, imp1;
-    __m128 vals = _mm_setzero_ps();
+    __m128 coeffs, deltas;
     ALuint i;
 
-    if((Offset&1))
+    for(i = 0;i < IrSize;i += 2)
     {
-        const ALuint o0 = Offset&HRIR_MASK;
-        const ALuint o1 = (Offset+IrSize-1)&HRIR_MASK;
-
-        coeffs = _mm_load_ps(&Coeffs[0][0]);
-        deltas = _mm_load_ps(&CoeffStep[0][0]);
-        vals = _mm_loadl_pi(vals, (__m64*)&Values[o0][0]);
-        imp0 = _mm_mul_ps(lrlr, coeffs);
+        coeffs = _mm_load_ps(&Coeffs[i][0]);
+        deltas = _mm_load_ps(&CoeffStep[i][0]);
         coeffs = _mm_add_ps(coeffs, deltas);
-        vals = _mm_add_ps(imp0, vals);
-        _mm_store_ps(&Coeffs[0][0], coeffs);
-        _mm_storel_pi((__m64*)&Values[o0][0], vals);
-        for(i = 1;i < IrSize-1;i += 2)
-        {
-            const ALuint o2 = (Offset+i)&HRIR_MASK;
-
-            coeffs = _mm_load_ps(&Coeffs[i+1][0]);
-            deltas = _mm_load_ps(&CoeffStep[i+1][0]);
-            vals = _mm_load_ps(&Values[o2][0]);
-            imp1 = _mm_mul_ps(lrlr, coeffs);
-            coeffs = _mm_add_ps(coeffs, deltas);
-            imp0 = _mm_shuffle_ps(imp0, imp1, _MM_SHUFFLE(1, 0, 3, 2));
-            vals = _mm_add_ps(imp0, vals);
-            _mm_store_ps(&Coeffs[i+1][0], coeffs);
-            _mm_store_ps(&Values[o2][0], vals);
-            imp0 = imp1;
-        }
-        vals = _mm_loadl_pi(vals, (__m64*)&Values[o1][0]);
-        imp0 = _mm_movehl_ps(imp0, imp0);
-        vals = _mm_add_ps(imp0, vals);
-        _mm_storel_pi((__m64*)&Values[o1][0], vals);
-    }
-    else
-    {
-        for(i = 0;i < IrSize;i += 2)
-        {
-            const ALuint o = (Offset + i)&HRIR_MASK;
-
-            coeffs = _mm_load_ps(&Coeffs[i][0]);
-            deltas = _mm_load_ps(&CoeffStep[i][0]);
-            vals = _mm_load_ps(&Values[o][0]);
-            imp0 = _mm_mul_ps(lrlr, coeffs);
-            coeffs = _mm_add_ps(coeffs, deltas);
-            vals = _mm_add_ps(imp0, vals);
-            _mm_store_ps(&Coeffs[i][0], coeffs);
-            _mm_store_ps(&Values[o][0], vals);
-        }
+        _mm_store_ps(&Coeffs[i][0], coeffs);
     }
 }