merge of glsl-compiler-1 branch

1 files changed, 181 insertions, 253 deletions

diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h
index 9e0a8a3d32..435491a0c8 100644
--- a/src/mesa/swrast/s_tritemp.h
+++ b/src/mesa/swrast/s_tritemp.h
@@ -1,8 +1,8 @@
 /*
  * Mesa 3-D graphics library
- * Version:  6.5
+ * Version:  6.5.3
  *
- * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -38,10 +38,8 @@
  *    INTERP_INDEX    - if defined, interpolate color index values
  *    INTERP_INT_TEX  - if defined, interpolate integer ST texcoords
  *                         (fast, simple 2-D texture mapping)
- *    INTERP_TEX      - if defined, interpolate set 0 float STRQ texcoords
+ *    INTERP_TEX      - if defined, interpolate texcoords and varying vars
  *                         NOTE:  OpenGL STRQ = Mesa STUV (R was taken for red)
- *    INTERP_MULTITEX - if defined, interpolate N units of STRQ texcoords
- *    INTERP_VARYING  - if defined, interpolate M floats of GLSL varyings
  *
  * When one can directly address pixels in the color buffer the following
  * macros can be defined and used to compute pixel addresses during
@@ -119,43 +117,19 @@
 #endif
 
 
-/*
- * Either loop over all texture units, or just use unit zero.
- */
-#ifdef INTERP_MULTITEX
-#define TEX_UNIT_LOOP(CODE)					\
-   {								\
-      GLuint u;							\
-      for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {	\
-         if (ctx->Texture._EnabledCoordUnits & (1 << u)) {	\
-            CODE						\
-         }							\
-      }								\
+#define TEXVAR_LOOP(CODE)                                \
+   {                                                     \
+      GLuint attr;                                       \
+      for (attr = swrast->_MinFragmentAttrib;            \
+           attr < swrast->_MaxFragmentAttrib; attr++) {  \
+         if (swrast->_FragmentAttribs & (1 << attr)) {   \
+            CODE                                         \
+         }                                               \
+      }                                                  \
    }
-#define INTERP_TEX
-#elif defined(INTERP_TEX)
-#define TEX_UNIT_LOOP(CODE)					\
-   {								\
-      const GLuint u = 0;					\
-      CODE							\
-   }
-#endif
 
 
 
-#ifdef INTERP_VARYING
-#define VARYING_LOOP(CODE)\
-   {\
-      GLuint iv, ic;\
-      for (iv = 0; iv < MAX_VARYING_VECTORS; iv++) {\
-         for (ic = 0; ic < VARYINGS_PER_VECTOR; ic++) {\
-            CODE\
-         }\
-      }\
-   }
-#endif
-
-
 
 /*
  * Some code we unfortunately need to prevent negative interpolated colors.
@@ -201,6 +175,7 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
       GLint lines;	/* number of lines to be sampled on this edge */
    } EdgeT;
 
+   const SWcontext *swrast = SWRAST_CONTEXT(ctx);
 #ifdef INTERP_Z
    const GLint depthBits = ctx->DrawBuffer->Visual.depthBits;
    const GLint fixedToDepthShift = depthBits <= 16 ? FIXED_SHIFT : 0;
@@ -218,6 +193,8 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 
    SWspan span;
 
+   (void) swrast;
+
    INIT_SPAN(span, GL_POLYGON, 0, 0, 0);
 
 #ifdef INTERP_Z
@@ -465,19 +442,19 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
       {
          GLfloat eMaj_dz = vMax->win[2] - vMin->win[2];
          GLfloat eBot_dz = vMid->win[2] - vMin->win[2];
-         span.dzdx = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
-         if (span.dzdx > maxDepth || span.dzdx < -maxDepth) {
+         span.attrStepX[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj_dz * eBot.dy - eMaj.dy * eBot_dz);
+         if (span.attrStepX[FRAG_ATTRIB_WPOS][2] > maxDepth || span.attrStepX[FRAG_ATTRIB_WPOS][2] < -maxDepth) {
             /* probably a sliver triangle */
-            span.dzdx = 0.0;
-            span.dzdy = 0.0;
+            span.attrStepX[FRAG_ATTRIB_WPOS][2] = 0.0;
+            span.attrStepY[FRAG_ATTRIB_WPOS][2] = 0.0;
          }
          else {
-            span.dzdy = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
+            span.attrStepY[FRAG_ATTRIB_WPOS][2] = oneOverArea * (eMaj.dx * eBot_dz - eMaj_dz * eBot.dx);
          }
          if (depthBits <= 16)
-            span.zStep = SignedFloatToFixed(span.dzdx);
+            span.zStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_WPOS][2]);
          else
-            span.zStep = (GLint) span.dzdx;
+            span.zStep = (GLint) span.attrStepX[FRAG_ATTRIB_WPOS][2];
       }
 #endif
 #ifdef INTERP_W
@@ -485,8 +462,8 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
       {
          const GLfloat eMaj_dw = vMax->win[3] - vMin->win[3];
          const GLfloat eBot_dw = vMid->win[3] - vMin->win[3];
-         span.dwdx = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw);
-         span.dwdy = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj_dw * eBot.dy - eMaj.dy * eBot_dw);
+         span.attrStepY[FRAG_ATTRIB_WPOS][3] = oneOverArea * (eMaj.dx * eBot_dw - eMaj_dw * eBot.dx);
       }
 #endif
 #ifdef INTERP_FOG
@@ -500,9 +477,8 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
          const GLfloat eMaj_dfog = vMax->fog - vMin->fog;
          const GLfloat eBot_dfog = vMid->fog - vMin->fog;
 #  endif
-         span.dfogdx = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
-         span.dfogdy = oneOverArea * (eMaj.dx * eBot_dfog - eMaj_dfog * eBot.dx);
-         span.fogStep = span.dfogdx;
+         span.attrStepX[FRAG_ATTRIB_FOGC][0] = oneOverArea * (eMaj_dfog * eBot.dy - eMaj.dy * eBot_dfog);
+         span.attrStepY[FRAG_ATTRIB_FOGC][0] = oneOverArea * (eMaj.dx * eBot_dfog - eMaj_dfog * eBot.dx);
       }
 #endif
 #ifdef INTERP_RGB
@@ -518,37 +494,37 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
          GLfloat eMaj_da = (GLfloat) ((ColorTemp) vMax->color[ACOMP] - (ColorTemp) vMin->color[ACOMP]);
          GLfloat eBot_da = (GLfloat) ((ColorTemp) vMid->color[ACOMP] - (ColorTemp) vMin->color[ACOMP]);
 #  endif
-         span.drdx = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
-         span.drdy = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
-         span.dgdx = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
-         span.dgdy = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
-         span.dbdx = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
-         span.dbdy = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj_dr * eBot.dy - eMaj.dy * eBot_dr);
+         span.attrStepY[FRAG_ATTRIB_COL0][0] = oneOverArea * (eMaj.dx * eBot_dr - eMaj_dr * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj_dg * eBot.dy - eMaj.dy * eBot_dg);
+         span.attrStepY[FRAG_ATTRIB_COL0][1] = oneOverArea * (eMaj.dx * eBot_dg - eMaj_dg * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj_db * eBot.dy - eMaj.dy * eBot_db);
+         span.attrStepY[FRAG_ATTRIB_COL0][2] = oneOverArea * (eMaj.dx * eBot_db - eMaj_db * eBot.dx);
 #  if CHAN_TYPE == GL_FLOAT
-         span.redStep   = span.drdx;
-         span.greenStep = span.dgdx;
-         span.blueStep  = span.dbdx;
+         span.redStep   = span.attrStepX[FRAG_ATTRIB_COL0][0];
+         span.greenStep = span.attrStepX[FRAG_ATTRIB_COL0][1];
+         span.blueStep  = span.attrStepX[FRAG_ATTRIB_COL0][2];
 #  else
-         span.redStep   = SignedFloatToFixed(span.drdx);
-         span.greenStep = SignedFloatToFixed(span.dgdx);
-         span.blueStep  = SignedFloatToFixed(span.dbdx);
+         span.redStep   = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][0]);
+         span.greenStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][1]);
+         span.blueStep  = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][2]);
 #  endif /* GL_FLOAT */
 #  ifdef INTERP_ALPHA
-         span.dadx = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
-         span.dady = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj_da * eBot.dy - eMaj.dy * eBot_da);
+         span.attrStepX[FRAG_ATTRIB_COL0][3] = oneOverArea * (eMaj.dx * eBot_da - eMaj_da * eBot.dx);
 #    if CHAN_TYPE == GL_FLOAT
-         span.alphaStep = span.dadx;
+         span.alphaStep = span.attrStepX[FRAG_ATTRIB_COL0][3];
 #    else
-         span.alphaStep = SignedFloatToFixed(span.dadx);
+         span.alphaStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][3]);
 #    endif /* GL_FLOAT */
 #  endif /* INTERP_ALPHA */
       }
       else {
          ASSERT(ctx->Light.ShadeModel == GL_FLAT);
          span.interpMask |= SPAN_FLAT;
-         span.drdx = span.drdy = 0.0F;
-         span.dgdx = span.dgdy = 0.0F;
-         span.dbdx = span.dbdy = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL0][0] = span.attrStepY[FRAG_ATTRIB_COL0][0] = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL0][1] = span.attrStepY[FRAG_ATTRIB_COL0][1] = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL0][2] = span.attrStepY[FRAG_ATTRIB_COL0][2] = 0.0F;
 #    if CHAN_TYPE == GL_FLOAT
 	 span.redStep   = 0.0F;
 	 span.greenStep = 0.0F;
@@ -559,7 +535,7 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 	 span.blueStep  = 0;
 #    endif /* GL_FLOAT */
 #  ifdef INTERP_ALPHA
-         span.dadx = span.dady = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL0][3] = span.attrStepX[FRAG_ATTRIB_COL0][3] = 0.0F;
 #    if CHAN_TYPE == GL_FLOAT
 	 span.alphaStep = 0.0F;
 #    else
@@ -577,26 +553,26 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
          GLfloat eBot_dsg = (GLfloat) ((ColorTemp) vMid->specular[GCOMP] - (ColorTemp) vMin->specular[GCOMP]);
          GLfloat eMaj_dsb = (GLfloat) ((ColorTemp) vMax->specular[BCOMP] - (ColorTemp) vMin->specular[BCOMP]);
          GLfloat eBot_dsb = (GLfloat) ((ColorTemp) vMid->specular[BCOMP] - (ColorTemp) vMin->specular[BCOMP]);
-         span.dsrdx = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
-         span.dsrdy = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
-         span.dsgdx = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
-         span.dsgdy = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
-         span.dsbdx = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
-         span.dsbdy = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL1][0] = oneOverArea * (eMaj_dsr * eBot.dy - eMaj.dy * eBot_dsr);
+         span.attrStepY[FRAG_ATTRIB_COL1][0] = oneOverArea * (eMaj.dx * eBot_dsr - eMaj_dsr * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL1][1] = oneOverArea * (eMaj_dsg * eBot.dy - eMaj.dy * eBot_dsg);
+         span.attrStepY[FRAG_ATTRIB_COL1][1] = oneOverArea * (eMaj.dx * eBot_dsg - eMaj_dsg * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_COL1][2] = oneOverArea * (eMaj_dsb * eBot.dy - eMaj.dy * eBot_dsb);
+         span.attrStepY[FRAG_ATTRIB_COL1][2] = oneOverArea * (eMaj.dx * eBot_dsb - eMaj_dsb * eBot.dx);
 #  if CHAN_TYPE == GL_FLOAT
-         span.specRedStep   = span.dsrdx;
+         span.specRedStep   = span.attrStep[FRAG_ATTRIB_COL1][0];
          span.specGreenStep = span.dsgdx;
          span.specBlueStep  = span.dsbdx;
 #  else
-         span.specRedStep   = SignedFloatToFixed(span.dsrdx);
-         span.specGreenStep = SignedFloatToFixed(span.dsgdx);
-         span.specBlueStep  = SignedFloatToFixed(span.dsbdx);
+         span.specRedStep   = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL1][0]);
+         span.specGreenStep = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL1][1]);
+         span.specBlueStep  = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL1][2]);
 #  endif
       }
       else {
-         span.dsrdx = span.dsrdy = 0.0F;
-         span.dsgdx = span.dsgdy = 0.0F;
-         span.dsbdx = span.dsbdy = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL1][0] = span.attrStepY[FRAG_ATTRIB_COL1][0] = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL1][1] = span.attrStepY[FRAG_ATTRIB_COL1][1] = 0.0F;
+         span.attrStepX[FRAG_ATTRIB_COL1][2] = span.attrStepY[FRAG_ATTRIB_COL1][2] = 0.0F;
 #  if CHAN_TYPE == GL_FLOAT
 	 span.specRedStep   = 0.0F;
 	 span.specGreenStep = 0.0F;
@@ -626,53 +602,40 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 #ifdef INTERP_INT_TEX
       span.interpMask |= SPAN_INT_TEXTURE;
       {
-         GLfloat eMaj_ds = (vMax->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
-         GLfloat eBot_ds = (vMid->texcoord[0][0] - vMin->texcoord[0][0]) * S_SCALE;
-         GLfloat eMaj_dt = (vMax->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
-         GLfloat eBot_dt = (vMid->texcoord[0][1] - vMin->texcoord[0][1]) * T_SCALE;
-         span.texStepX[0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
-         span.texStepY[0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
-         span.texStepX[0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
-         span.texStepY[0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
-         span.intTexStep[0] = SignedFloatToFixed(span.texStepX[0][0]);
-         span.intTexStep[1] = SignedFloatToFixed(span.texStepX[0][1]);
+         GLfloat eMaj_ds = (vMax->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+         GLfloat eBot_ds = (vMid->attrib[FRAG_ATTRIB_TEX0][0] - vMin->attrib[FRAG_ATTRIB_TEX0][0]) * S_SCALE;
+         GLfloat eMaj_dt = (vMax->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+         GLfloat eBot_dt = (vMid->attrib[FRAG_ATTRIB_TEX0][1] - vMin->attrib[FRAG_ATTRIB_TEX0][1]) * T_SCALE;
+         span.attrStepX[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+         span.attrStepY[FRAG_ATTRIB_TEX0][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+         span.attrStepX[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+         span.attrStepY[FRAG_ATTRIB_TEX0][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+         span.intTexStep[0] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+         span.intTexStep[1] = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_TEX0][1]);
       }
 #endif
 #ifdef INTERP_TEX
-      span.interpMask |= SPAN_TEXTURE;
+      span.interpMask |= (SPAN_TEXTURE | SPAN_VARYING);
       {
          /* win[3] is 1/W */
          const GLfloat wMax = vMax->win[3], wMin = vMin->win[3], wMid = vMid->win[3];
-         TEX_UNIT_LOOP(
-            GLfloat eMaj_ds = vMax->texcoord[u][0] * wMax - vMin->texcoord[u][0] * wMin;
-            GLfloat eBot_ds = vMid->texcoord[u][0] * wMid - vMin->texcoord[u][0] * wMin;
-            GLfloat eMaj_dt = vMax->texcoord[u][1] * wMax - vMin->texcoord[u][1] * wMin;
-            GLfloat eBot_dt = vMid->texcoord[u][1] * wMid - vMin->texcoord[u][1] * wMin;
-            GLfloat eMaj_du = vMax->texcoord[u][2] * wMax - vMin->texcoord[u][2] * wMin;
-            GLfloat eBot_du = vMid->texcoord[u][2] * wMid - vMin->texcoord[u][2] * wMin;
-            GLfloat eMaj_dv = vMax->texcoord[u][3] * wMax - vMin->texcoord[u][3] * wMin;
-            GLfloat eBot_dv = vMid->texcoord[u][3] * wMid - vMin->texcoord[u][3] * wMin;
-            span.texStepX[u][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
-            span.texStepY[u][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
-            span.texStepX[u][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
-            span.texStepY[u][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
-            span.texStepX[u][2] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
-            span.texStepY[u][2] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
-            span.texStepX[u][3] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
-            span.texStepY[u][3] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
-         )
-      }
-#endif
-#ifdef INTERP_VARYING
-      span.interpMask |= SPAN_VARYING;
-      {
-         /* win[3] is 1/W */
-         const GLfloat wMax = vMax->win[3], wMin = vMin->win[3], wMid = vMid->win[3];
-         VARYING_LOOP(
-            GLfloat eMaj_dvar = vMax->attribute[iv][ic] * wMax - vMin->attribute[iv][ic] * wMin;
-            GLfloat eBot_dvar = vMid->attribute[iv][ic] * wMid - vMin->attribute[iv][ic] * wMin;
-            span.varStepX[iv][ic] = oneOverArea * (eMaj_dvar * eBot.dy - eMaj.dy * eBot_dvar);
-            span.varStepY[iv][ic] = oneOverArea * (eMaj.dx * eBot_dvar - eMaj_dvar * eBot.dx);
+         TEXVAR_LOOP(
+            GLfloat eMaj_ds = vMax->attrib[attr][0] * wMax - vMin->attrib[attr][0] * wMin;
+            GLfloat eBot_ds = vMid->attrib[attr][0] * wMid - vMin->attrib[attr][0] * wMin;
+            GLfloat eMaj_dt = vMax->attrib[attr][1] * wMax - vMin->attrib[attr][1] * wMin;
+            GLfloat eBot_dt = vMid->attrib[attr][1] * wMid - vMin->attrib[attr][1] * wMin;
+            GLfloat eMaj_du = vMax->attrib[attr][2] * wMax - vMin->attrib[attr][2] * wMin;
+            GLfloat eBot_du = vMid->attrib[attr][2] * wMid - vMin->attrib[attr][2] * wMin;
+            GLfloat eMaj_dv = vMax->attrib[attr][3] * wMax - vMin->attrib[attr][3] * wMin;
+            GLfloat eBot_dv = vMid->attrib[attr][3] * wMid - vMin->attrib[attr][3] * wMin;
+            span.attrStepX[attr][0] = oneOverArea * (eMaj_ds * eBot.dy - eMaj.dy * eBot_ds);
+            span.attrStepY[attr][0] = oneOverArea * (eMaj.dx * eBot_ds - eMaj_ds * eBot.dx);
+            span.attrStepX[attr][1] = oneOverArea * (eMaj_dt * eBot.dy - eMaj.dy * eBot_dt);
+            span.attrStepY[attr][1] = oneOverArea * (eMaj.dx * eBot_dt - eMaj_dt * eBot.dx);
+            span.attrStepX[attr][2] = oneOverArea * (eMaj_du * eBot.dy - eMaj.dy * eBot_du);
+            span.attrStepY[attr][2] = oneOverArea * (eMaj.dx * eBot_du - eMaj_du * eBot.dx);
+            span.attrStepX[attr][3] = oneOverArea * (eMaj_dv * eBot.dy - eMaj.dy * eBot_dv);
+            span.attrStepY[attr][3] = oneOverArea * (eMaj.dx * eBot_dv - eMaj_dv * eBot.dx);
          )
       }
 #endif
@@ -770,19 +733,14 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
          GLfixed tLeft=0, dtOuter=0, dtInner;
 #endif
 #ifdef INTERP_TEX
-         GLfloat sLeft[MAX_TEXTURE_COORD_UNITS];
-         GLfloat tLeft[MAX_TEXTURE_COORD_UNITS];
-         GLfloat uLeft[MAX_TEXTURE_COORD_UNITS];
-         GLfloat vLeft[MAX_TEXTURE_COORD_UNITS];
-         GLfloat dsOuter[MAX_TEXTURE_COORD_UNITS], dsInner[MAX_TEXTURE_COORD_UNITS];
-         GLfloat dtOuter[MAX_TEXTURE_COORD_UNITS], dtInner[MAX_TEXTURE_COORD_UNITS];
-         GLfloat duOuter[MAX_TEXTURE_COORD_UNITS], duInner[MAX_TEXTURE_COORD_UNITS];
-         GLfloat dvOuter[MAX_TEXTURE_COORD_UNITS], dvInner[MAX_TEXTURE_COORD_UNITS];
-#endif
-#ifdef INTERP_VARYING
-         GLfloat varLeft[MAX_VARYING_VECTORS][VARYINGS_PER_VECTOR];
-         GLfloat dvarOuter[MAX_VARYING_VECTORS][VARYINGS_PER_VECTOR];
-         GLfloat dvarInner[MAX_VARYING_VECTORS][VARYINGS_PER_VECTOR];
+         GLfloat sLeft[FRAG_ATTRIB_MAX];
+         GLfloat tLeft[FRAG_ATTRIB_MAX];
+         GLfloat uLeft[FRAG_ATTRIB_MAX];
+         GLfloat vLeft[FRAG_ATTRIB_MAX];
+         GLfloat dsOuter[FRAG_ATTRIB_MAX], dsInner[FRAG_ATTRIB_MAX];
+         GLfloat dtOuter[FRAG_ATTRIB_MAX], dtInner[FRAG_ATTRIB_MAX];
+         GLfloat duOuter[FRAG_ATTRIB_MAX], duInner[FRAG_ATTRIB_MAX];
+         GLfloat dvOuter[FRAG_ATTRIB_MAX], dvInner[FRAG_ATTRIB_MAX];
 #endif
 
          for (subTriangle=0; subTriangle<=1; subTriangle++) {
@@ -894,19 +852,20 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
                   GLfloat z0 = vLower->win[2];
                   if (depthBits <= 16) {
                      /* interpolate fixed-pt values */
-                     GLfloat tmp = (z0 * FIXED_SCALE + span.dzdx * adjx
-                                    + span.dzdy * adjy) + FIXED_HALF;
+                     GLfloat tmp = (z0 * FIXED_SCALE
+                                    + span.attrStepX[FRAG_ATTRIB_WPOS][2] * adjx
+                                    + span.attrStepY[FRAG_ATTRIB_WPOS][2] * adjy) + FIXED_HALF;
                      if (tmp < MAX_GLUINT / 2)
                         zLeft = (GLfixed) tmp;
                      else
                         zLeft = MAX_GLUINT / 2;
-                     fdzOuter = SignedFloatToFixed(span.dzdy + dxOuter * span.dzdx);
+                     fdzOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_WPOS][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
                   }
                   else {
                      /* interpolate depth values w/out scaling */
-                     zLeft = (GLuint) (z0 + span.dzdx * FixedToFloat(adjx)
-                                       + span.dzdy * FixedToFloat(adjy));
-                     fdzOuter = (GLint) (span.dzdy + dxOuter * span.dzdx);
+                     zLeft = (GLuint) (z0 + span.attrStepX[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjx)
+                                          + span.attrStepY[FRAG_ATTRIB_WPOS][2] * FixedToFloat(adjy));
+                     fdzOuter = (GLint) (span.attrStepY[FRAG_ATTRIB_WPOS][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][2]);
                   }
 #  ifdef DEPTH_TYPE
                   zRow = (DEPTH_TYPE *)
@@ -916,41 +875,41 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
                }
 #endif
 #ifdef INTERP_W
-               wLeft = vLower->win[3] + (span.dwdx * adjx + span.dwdy * adjy) * (1.0F/FIXED_SCALE);
-               dwOuter = span.dwdy + dxOuter * span.dwdx;
+               wLeft = vLower->win[3] + (span.attrStepX[FRAG_ATTRIB_WPOS][3] * adjx + span.attrStepY[FRAG_ATTRIB_WPOS][3] * adjy) * (1.0F/FIXED_SCALE);
+               dwOuter = span.attrStepY[FRAG_ATTRIB_WPOS][3] + dxOuter * span.attrStepX[FRAG_ATTRIB_WPOS][3];
 #endif
 #ifdef INTERP_FOG
 #  ifdef INTERP_W
-               fogLeft = vLower->fog * vLower->win[3] + (span.dfogdx * adjx + span.dfogdy * adjy) * (1.0F/FIXED_SCALE);
+               fogLeft = vLower->fog * vLower->win[3] + (span.attrStepX[FRAG_ATTRIB_FOGC][0] * adjx + span.attrStepY[FRAG_ATTRIB_FOGC][0] * adjy) * (1.0F/FIXED_SCALE);
 #  else
-               fogLeft = vLower->fog + (span.dfogdx * adjx + span.dfogdy * adjy) * (1.0F/FIXED_SCALE);
+               fogLeft = vLower->fog + (span.attrStepX[FRAG_ATTRIB_FOGC][0] * adjx + span.attrStepY[FRAG_ATTRIB_FOGC][0] * adjy) * (1.0F/FIXED_SCALE);
 #  endif
-               dfogOuter = span.dfogdy + dxOuter * span.dfogdx;
+               dfogOuter = span.attrStepY[FRAG_ATTRIB_FOGC][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_FOGC][0];
 #endif
 #ifdef INTERP_RGB
                if (ctx->Light.ShadeModel == GL_SMOOTH) {
 #  if CHAN_TYPE == GL_FLOAT
-                  rLeft = vLower->color[RCOMP] + (span.drdx * adjx + span.drdy * adjy) * (1.0F / FIXED_SCALE);
-                  gLeft = vLower->color[GCOMP] + (span.dgdx * adjx + span.dgdy * adjy) * (1.0F / FIXED_SCALE);
-                  bLeft = vLower->color[BCOMP] + (span.dbdx * adjx + span.dbdy * adjy) * (1.0F / FIXED_SCALE);
-                  fdrOuter = span.drdy + dxOuter * span.drdx;
-                  fdgOuter = span.dgdy + dxOuter * span.dgdx;
-                  fdbOuter = span.dbdy + dxOuter * span.dbdx;
+                  rLeft = vLower->color[RCOMP] + (span.attrStepX[FRAG_ATTRIB_COL0][0] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][0] * adjy) * (1.0F / FIXED_SCALE);
+                  gLeft = vLower->color[GCOMP] + (span.attrStepX[FRAG_ATTRIB_COL0][1] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][1] * adjy) * (1.0F / FIXED_SCALE);
+                  bLeft = vLower->color[BCOMP] + (span.attrStepX[FRAG_ATTRIB_COL0][2] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][2] * adjy) * (1.0F / FIXED_SCALE);
+                  fdrOuter = span.attrStepY[FRAG_ATTRIB_COL0][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][0];
+                  fdgOuter = span.attrStepY[FRAG_ATTRIB_COL0][1] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][1];
+                  fdbOuter = span.attrStepY[FRAG_ATTRIB_COL0][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][2];
 #  else
-                  rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP]) + span.drdx * adjx + span.drdy * adjy) + FIXED_HALF;
-                  gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP]) + span.dgdx * adjx + span.dgdy * adjy) + FIXED_HALF;
-                  bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP]) + span.dbdx * adjx + span.dbdy * adjy) + FIXED_HALF;
-                  fdrOuter = SignedFloatToFixed(span.drdy + dxOuter * span.drdx);
-                  fdgOuter = SignedFloatToFixed(span.dgdy + dxOuter * span.dgdx);
-                  fdbOuter = SignedFloatToFixed(span.dbdy + dxOuter * span.dbdx);
+                  rLeft = (GLint)(ChanToFixed(vLower->color[RCOMP]) + span.attrStepX[FRAG_ATTRIB_COL0][0] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][0] * adjy) + FIXED_HALF;
+                  gLeft = (GLint)(ChanToFixed(vLower->color[GCOMP]) + span.attrStepX[FRAG_ATTRIB_COL0][1] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][1] * adjy) + FIXED_HALF;
+                  bLeft = (GLint)(ChanToFixed(vLower->color[BCOMP]) + span.attrStepX[FRAG_ATTRIB_COL0][2] * adjx + span.attrStepY[FRAG_ATTRIB_COL0][2] * adjy) + FIXED_HALF;
+                  fdrOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][0]);
+                  fdgOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][1] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][1]);
+                  fdbOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL0][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][2]);
 #  endif
 #  ifdef INTERP_ALPHA
 #    if CHAN_TYPE == GL_FLOAT
-                  aLeft = vLower->color[ACOMP] + (span.dadx * adjx + span.dady * adjy) * (1.0F / FIXED_SCALE);
-                  fdaOuter = span.dady + dxOuter * span.dadx;
+                  aLeft = vLower->color[ACOMP] + (span.attrStepX[FRAG_ATTRIB_COL0][3] * adjx + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjy) * (1.0F / FIXED_SCALE);
+                  fdaOuter = span.attrStepX[FRAG_ATTRIB_COL0][3] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][3];
 #    else
-                  aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP]) + span.dadx * adjx + span.dady * adjy) + FIXED_HALF;
-                  fdaOuter = SignedFloatToFixed(span.dady + dxOuter * span.dadx);
+                  aLeft = (GLint)(ChanToFixed(vLower->color[ACOMP]) + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjx + span.attrStepX[FRAG_ATTRIB_COL0][3] * adjy) + FIXED_HALF;
+                  fdaOuter = SignedFloatToFixed(span.attrStepX[FRAG_ATTRIB_COL0][3] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL0][3]);
 #    endif
 #  endif
                }
@@ -983,19 +942,19 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 #ifdef INTERP_SPEC
                if (ctx->Light.ShadeModel == GL_SMOOTH) {
 #  if CHAN_TYPE == GL_FLOAT
-                  srLeft = vLower->specular[RCOMP] + (span.dsrdx * adjx + span.dsrdy * adjy) * (1.0F / FIXED_SCALE);
-                  sgLeft = vLower->specular[GCOMP] + (span.dsgdx * adjx + span.dsgdy * adjy) * (1.0F / FIXED_SCALE);
-                  sbLeft = vLower->specular[BCOMP] + (span.dsbdx * adjx + span.dsbdy * adjy) * (1.0F / FIXED_SCALE);
-                  dsrOuter = span.dsrdy + dxOuter * span.dsrdx;
-                  dsgOuter = span.dsgdy + dxOuter * span.dsgdx;
-                  dsbOuter = span.dsbdy + dxOuter * span.dsbdx;
+                  srLeft = vLower->specular[RCOMP] + (span.attrStepX[FRAG_ATTRIB_COL1][0] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][0] * adjy) * (1.0F / FIXED_SCALE);
+                  sgLeft = vLower->specular[GCOMP] + (span.attrStepX[FRAG_ATTRIB_COL1][1] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][1] * adjy) * (1.0F / FIXED_SCALE);
+                  sbLeft = vLower->specular[BCOMP] + (span.attrStepX[FRAG_ATTRIB_COL1][2] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][2] * adjy) * (1.0F / FIXED_SCALE);
+                  dsrOuter = span.attrStepY[FRAG_ATTRIB_COL1][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][0];
+                  dsgOuter = span.attrStepY[FRAG_ATTRIB_COL1][1] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][1];
+                  dsbOuter = span.attrStepY[FRAG_ATTRIB_COL1][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][2];
 #  else
-                  srLeft = (GLfixed) (ChanToFixed(vLower->specular[RCOMP]) + span.dsrdx * adjx + span.dsrdy * adjy) + FIXED_HALF;
-                  sgLeft = (GLfixed) (ChanToFixed(vLower->specular[GCOMP]) + span.dsgdx * adjx + span.dsgdy * adjy) + FIXED_HALF;
-                  sbLeft = (GLfixed) (ChanToFixed(vLower->specular[BCOMP]) + span.dsbdx * adjx + span.dsbdy * adjy) + FIXED_HALF;
-                  dsrOuter = SignedFloatToFixed(span.dsrdy + dxOuter * span.dsrdx);
-                  dsgOuter = SignedFloatToFixed(span.dsgdy + dxOuter * span.dsgdx);
-                  dsbOuter = SignedFloatToFixed(span.dsbdy + dxOuter * span.dsbdx);
+                  srLeft = (GLfixed) (ChanToFixed(vLower->specular[RCOMP]) + span.attrStepX[FRAG_ATTRIB_COL1][0] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][0] * adjy) + FIXED_HALF;
+                  sgLeft = (GLfixed) (ChanToFixed(vLower->specular[GCOMP]) + span.attrStepX[FRAG_ATTRIB_COL1][1] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][1] * adjy) + FIXED_HALF;
+                  sbLeft = (GLfixed) (ChanToFixed(vLower->specular[BCOMP]) + span.attrStepX[FRAG_ATTRIB_COL1][2] * adjx + span.attrStepY[FRAG_ATTRIB_COL1][2] * adjy) + FIXED_HALF;
+                  dsrOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL1][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][0]);
+                  dsgOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL1][1] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][1]);
+                  dsbOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_COL1][2] + dxOuter * span.attrStepX[FRAG_ATTRIB_COL1][2]);
 #  endif
                }
                else {
@@ -1029,41 +988,32 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 #ifdef INTERP_INT_TEX
                {
                   GLfloat s0, t0;
-                  s0 = vLower->texcoord[0][0] * S_SCALE;
-                  sLeft = (GLfixed)(s0 * FIXED_SCALE + span.texStepX[0][0] * adjx
-                                 + span.texStepY[0][0] * adjy) + FIXED_HALF;
-                  dsOuter = SignedFloatToFixed(span.texStepY[0][0] + dxOuter * span.texStepX[0][0]);
-
-                  t0 = vLower->texcoord[0][1] * T_SCALE;
-                  tLeft = (GLfixed)(t0 * FIXED_SCALE + span.texStepX[0][1] * adjx
-                                 + span.texStepY[0][1] * adjy) + FIXED_HALF;
-                  dtOuter = SignedFloatToFixed(span.texStepY[0][1] + dxOuter * span.texStepX[0][1]);
+                  s0 = vLower->attrib[FRAG_ATTRIB_TEX0][0] * S_SCALE;
+                  sLeft = (GLfixed)(s0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][0] * adjx
+                                 + span.attrStepY[FRAG_ATTRIB_TEX0][0] * adjy) + FIXED_HALF;
+                  dsOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][0] + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][0]);
+
+                  t0 = vLower->attrib[FRAG_ATTRIB_TEX0][1] * T_SCALE;
+                  tLeft = (GLfixed)(t0 * FIXED_SCALE + span.attrStepX[FRAG_ATTRIB_TEX0][1] * adjx
+                                 + span.attrStepY[FRAG_ATTRIB_TEX0][1] * adjy) + FIXED_HALF;
+                  dtOuter = SignedFloatToFixed(span.attrStepY[FRAG_ATTRIB_TEX0][1] + dxOuter * span.attrStepX[FRAG_ATTRIB_TEX0][1]);
                }
 #endif
 #ifdef INTERP_TEX
-               TEX_UNIT_LOOP(
+               TEXVAR_LOOP(
                   const GLfloat invW = vLower->win[3];
-                  const GLfloat s0 = vLower->texcoord[u][0] * invW;
-                  const GLfloat t0 = vLower->texcoord[u][1] * invW;
-                  const GLfloat u0 = vLower->texcoord[u][2] * invW;
-                  const GLfloat v0 = vLower->texcoord[u][3] * invW;
-                  sLeft[u] = s0 + (span.texStepX[u][0] * adjx + span.texStepY[u][0] * adjy) * (1.0F/FIXED_SCALE);
-                  tLeft[u] = t0 + (span.texStepX[u][1] * adjx + span.texStepY[u][1] * adjy) * (1.0F/FIXED_SCALE);
-                  uLeft[u] = u0 + (span.texStepX[u][2] * adjx + span.texStepY[u][2] * adjy) * (1.0F/FIXED_SCALE);
-                  vLeft[u] = v0 + (span.texStepX[u][3] * adjx + span.texStepY[u][3] * adjy) * (1.0F/FIXED_SCALE);
-                  dsOuter[u] = span.texStepY[u][0] + dxOuter * span.texStepX[u][0];
-                  dtOuter[u] = span.texStepY[u][1] + dxOuter * span.texStepX[u][1];
-                  duOuter[u] = span.texStepY[u][2] + dxOuter * span.texStepX[u][2];
-                  dvOuter[u] = span.texStepY[u][3] + dxOuter * span.texStepX[u][3];
-               )
-#endif
-#ifdef INTERP_VARYING
-               VARYING_LOOP(
-                  const GLfloat invW = vLower->win[3];
-                  const GLfloat var0 = vLower->attribute[iv][ic] * invW;
-                  varLeft[iv][ic] = var0 + (span.varStepX[iv][ic] * adjx +
-                     span.varStepY[iv][ic] * adjy) * (1.0f / FIXED_SCALE);
-                  dvarOuter[iv][ic] = span.varStepY[iv][ic] + dxOuter * span.varStepX[iv][ic];
+                  const GLfloat s0 = vLower->attrib[attr][0] * invW;
+                  const GLfloat t0 = vLower->attrib[attr][1] * invW;
+                  const GLfloat u0 = vLower->attrib[attr][2] * invW;
+                  const GLfloat v0 = vLower->attrib[attr][3] * invW;
+                  sLeft[attr] = s0 + (span.attrStepX[attr][0] * adjx + span.attrStepY[attr][0] * adjy) * (1.0F/FIXED_SCALE);
+                  tLeft[attr] = t0 + (span.attrStepX[attr][1] * adjx + span.attrStepY[attr][1] * adjy) * (1.0F/FIXED_SCALE);
+                  uLeft[attr] = u0 + (span.attrStepX[attr][2] * adjx + span.attrStepY[attr][2] * adjy) * (1.0F/FIXED_SCALE);
+                  vLeft[attr] = v0 + (span.attrStepX[attr][3] * adjx + span.attrStepY[attr][3] * adjy) * (1.0F/FIXED_SCALE);
+                  dsOuter[attr] = span.attrStepY[attr][0] + dxOuter * span.attrStepX[attr][0];
+                  dtOuter[attr] = span.attrStepY[attr][1] + dxOuter * span.attrStepX[attr][1];
+                  duOuter[attr] = span.attrStepY[attr][2] + dxOuter * span.attrStepX[attr][2];
+                  dvOuter[attr] = span.attrStepY[attr][3] + dxOuter * span.attrStepX[attr][3];
                )
 #endif
             } /*if setupLeft*/
@@ -1095,10 +1045,10 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
             fdzInner = fdzOuter + span.zStep;
 #endif
 #ifdef INTERP_W
-            dwInner = dwOuter + span.dwdx;
+            dwInner = dwOuter + span.attrStepX[FRAG_ATTRIB_WPOS][3];
 #endif
 #ifdef INTERP_FOG
-            dfogInner = dfogOuter + span.dfogdx;
+            dfogInner = dfogOuter + span.attrStepX[FRAG_ATTRIB_FOGC][0];
 #endif
 #ifdef INTERP_RGB
             fdrInner = fdrOuter + span.redStep;
@@ -1121,16 +1071,11 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
             dtInner = dtOuter + span.intTexStep[1];
 #endif
 #ifdef INTERP_TEX
-            TEX_UNIT_LOOP(
-               dsInner[u] = dsOuter[u] + span.texStepX[u][0];
-               dtInner[u] = dtOuter[u] + span.texStepX[u][1];
-               duInner[u] = duOuter[u] + span.texStepX[u][2];
-               dvInner[u] = dvOuter[u] + span.texStepX[u][3];
-            )
-#endif
-#ifdef INTERP_VARYING
-            VARYING_LOOP(
-               dvarInner[iv][ic] = dvarOuter[iv][ic] + span.varStepX[iv][ic];
+            TEXVAR_LOOP(
+               dsInner[attr] = dsOuter[attr] + span.attrStepX[attr][0];
+               dtInner[attr] = dtOuter[attr] + span.attrStepX[attr][1];
+               duInner[attr] = duOuter[attr] + span.attrStepX[attr][2];
+               dvInner[attr] = dvOuter[attr] + span.attrStepX[attr][3];
             )
 #endif
 
@@ -1148,10 +1093,10 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
                span.z = zLeft;
 #endif
 #ifdef INTERP_W
-               span.w = wLeft;
+               span.attrStart[FRAG_ATTRIB_WPOS][3] = wLeft;
 #endif
 #ifdef INTERP_FOG
-               span.fog = fogLeft;
+               span.attrStart[FRAG_ATTRIB_FOGC][0] = fogLeft;
 #endif
 #ifdef INTERP_RGB
                span.red = rLeft;
@@ -1175,16 +1120,11 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 #endif
 
 #ifdef INTERP_TEX
-               TEX_UNIT_LOOP(
-                  span.tex[u][0] = sLeft[u];
-                  span.tex[u][1] = tLeft[u];
-                  span.tex[u][2] = uLeft[u];
-                  span.tex[u][3] = vLeft[u];
-               )
-#endif
-#ifdef INTERP_VARYING
-               VARYING_LOOP(
-                  span.var[iv][ic] = varLeft[iv][ic];
+               TEXVAR_LOOP(
+                  span.attrStart[attr][0] = sLeft[attr];
+                  span.attrStart[attr][1] = tLeft[attr];
+                  span.attrStart[attr][2] = uLeft[attr];
+                  span.attrStart[attr][3] = vLeft[attr];
                )
 #endif
 
@@ -1268,16 +1208,11 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
                   tLeft += dtOuter;
 #endif
 #ifdef INTERP_TEX
-                  TEX_UNIT_LOOP(
-                     sLeft[u] += dsOuter[u];
-                     tLeft[u] += dtOuter[u];
-                     uLeft[u] += duOuter[u];
-                     vLeft[u] += dvOuter[u];
-                  )
-#endif
-#ifdef INTERP_VARYING
-                  VARYING_LOOP(
-                     varLeft[iv][ic] += dvarOuter[iv][ic];
+                  TEXVAR_LOOP(
+                     sLeft[attr] += dsOuter[attr];
+                     tLeft[attr] += dtOuter[attr];
+                     uLeft[attr] += duOuter[attr];
+                     vLeft[attr] += dvOuter[attr];
                   )
 #endif
                }
@@ -1318,16 +1253,11 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
                   tLeft += dtInner;
 #endif
 #ifdef INTERP_TEX
-                  TEX_UNIT_LOOP(
-                     sLeft[u] += dsInner[u];
-                     tLeft[u] += dtInner[u];
-                     uLeft[u] += duInner[u];
-                     vLeft[u] += dvInner[u];
-                  )
-#endif
-#ifdef INTERP_VARYING
-                  VARYING_LOOP(
-                     varLeft[iv][ic] += dvarInner[iv][ic];
+                  TEXVAR_LOOP(
+                     sLeft[attr] += dsInner[attr];
+                     tLeft[attr] += dtInner[attr];
+                     uLeft[attr] += duInner[attr];
+                     vLeft[attr] += dvInner[attr];
                   )
 #endif
                }
@@ -1360,8 +1290,6 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
 #undef INTERP_INDEX
 #undef INTERP_INT_TEX
 #undef INTERP_TEX
-#undef INTERP_MULTITEX
-#undef INTERP_VARYING
 #undef TEX_UNIT_LOOP
 #undef VARYING_LOOP