i965: change args to get_src_reg() to prep for new constant buffer support

1 files changed, 85 insertions, 79 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
index 28ef84e4aac..41db3a805b7 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c
@@ -254,7 +254,8 @@ static void prealloc_reg(struct brw_wm_compile *c)
  * Convert Mesa dst register to brw register.
  */
 static struct brw_reg get_dst_reg(struct brw_wm_compile *c, 
-                                  struct prog_instruction *inst, int component)
+                                  const struct prog_instruction *inst,
+                                  GLuint component)
 {
     const int nr = 1;
     return get_reg(c, inst->DstReg.File, inst->DstReg.Index, component, nr,
@@ -266,10 +267,13 @@ static struct brw_reg get_dst_reg(struct brw_wm_compile *c,
  * Convert Mesa src register to brw register.
  */
 static struct brw_reg get_src_reg(struct brw_wm_compile *c, 
-                                  struct prog_src_register *src, int index)
+                                  const struct prog_instruction *inst,
+                                  GLuint srcRegIndex, GLuint channel)
 {
-    const int nr = 1;
-    int component = GET_SWZ(src->Swizzle, index);
+    const struct prog_src_register *src = &inst->SrcReg[srcRegIndex];
+    const GLuint nr = 1;
+    const GLuint component = GET_SWZ(src->Swizzle, channel);
+
     return get_reg(c, src->File, src->Index, component, nr, 
                    src->NegateBase, src->Abs);
 }
@@ -282,11 +286,13 @@ static struct brw_reg get_src_reg(struct brw_wm_compile *c,
  * For instructions with more than one operand, only the second can be a literal.
  */
 static struct brw_reg get_src_reg_imm(struct brw_wm_compile *c, 
-                                      struct prog_src_register *src, int index)
+                                      const struct prog_instruction *inst,
+                                      GLuint srcRegIndex, GLuint channel)
 {
+    const struct prog_src_register *src = &inst->SrcReg[srcRegIndex];
     if (src->File == PROGRAM_CONSTANT) {
        /* a literal */
-       const int component = GET_SWZ(src->Swizzle, index);
+       const int component = GET_SWZ(src->Swizzle, channel);
        const GLfloat *param =
           c->fp->program.Base.Parameters->ParameterValues[src->Index];
        GLfloat value = param[component];
@@ -297,7 +303,7 @@ static struct brw_reg get_src_reg_imm(struct brw_wm_compile *c,
        return brw_imm_f(value);
     }
     else {
-       return get_src_reg(c, src, index);
+       return get_src_reg(c, inst, srcRegIndex, channel);
     }
 }
 
@@ -376,7 +382,7 @@ static void emit_abs( struct brw_wm_compile *c,
 	if (inst->DstReg.WriteMask & (1<<i)) {
 	    struct brw_reg src, dst;
 	    dst = get_dst_reg(c, inst, i);
-	    src = get_src_reg(c, &inst->SrcReg[0], i);
+	    src = get_src_reg(c, inst, 0, i);
 	    brw_MOV(p, dst, brw_abs(src));
 	}
     }
@@ -394,7 +400,7 @@ static void emit_trunc( struct brw_wm_compile *c,
 	if (mask & (1<<i)) {
 	    struct brw_reg src, dst;
 	    dst = get_dst_reg(c, inst, i);
-	    src = get_src_reg(c, &inst->SrcReg[0], i);
+	    src = get_src_reg(c, inst, 0, i);
 	    brw_RNDZ(p, dst, src);
 	}
     }
@@ -412,7 +418,7 @@ static void emit_mov( struct brw_wm_compile *c,
 	if (mask & (1<<i)) {
 	    struct brw_reg src, dst;
 	    dst = get_dst_reg(c, inst, i);
-	    src = get_src_reg_imm(c, &inst->SrcReg[0], i);
+	    src = get_src_reg_imm(c, inst, 0, i);
 	    brw_MOV(p, dst, src);
 	}
     }
@@ -459,8 +465,8 @@ static void emit_delta_xy(struct brw_wm_compile *c,
 
     dst0 = get_dst_reg(c, inst, 0);
     dst1 = get_dst_reg(c, inst, 1);
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
-    src1 = get_src_reg(c, &inst->SrcReg[0], 1);
+    src0 = get_src_reg(c, inst, 0, 0);
+    src1 = get_src_reg(c, inst, 0, 1);
     /* Calc delta X,Y by subtracting origin in r1 from the pixel
      * centers.
      */
@@ -525,7 +531,7 @@ static void emit_fb_write(struct brw_wm_compile *c,
 
     brw_push_insn_state(p);
     for (channel = 0; channel < 4; channel++) {
-        src0 = get_src_reg(c,  &inst->SrcReg[0], channel);
+        src0 = get_src_reg(c,  inst, 0, channel);
         /*  mov (8) m2.0<1>:ud   r28.0<8;8,1>:ud  { Align1 } */
         /*  mov (8) m6.0<1>:ud   r29.0<8;8,1>:ud  { Align1 SecHalf } */
         brw_MOV(p, brw_message_reg(nr + channel), src0);
@@ -536,11 +542,11 @@ static void emit_fb_write(struct brw_wm_compile *c,
 
     if (c->key.source_depth_to_render_target) {
        if (c->key.computes_depth) {
-          src0 = get_src_reg(c, &inst->SrcReg[2], 2);
+          src0 = get_src_reg(c, inst, 2, 2);
           brw_MOV(p, brw_message_reg(nr), src0);
        }
        else {
-          src0 = get_src_reg(c, &inst->SrcReg[1], 1);
+          src0 = get_src_reg(c, inst, 1, 1);
           brw_MOV(p, brw_message_reg(nr), src0);
        }
 
@@ -567,7 +573,7 @@ static void emit_fb_write(struct brw_wm_compile *c,
         else
 #endif
         {
-           struct brw_reg src =  get_src_reg(c, &inst->SrcReg[1], 1);
+           struct brw_reg src =  get_src_reg(c, inst, 1, 1);
            brw_MOV(p, brw_message_reg(nr), src);
         }
         nr += 2;
@@ -588,9 +594,9 @@ static void emit_pixel_w( struct brw_wm_compile *c,
 	struct brw_reg interp3;
 
 	dst = get_dst_reg(c, inst, 3);
-	src0 = get_src_reg(c, &inst->SrcReg[0], 0);
-	delta0 = get_src_reg(c, &inst->SrcReg[1], 0);
-	delta1 = get_src_reg(c, &inst->SrcReg[1], 1);
+	src0 = get_src_reg(c, inst, 0, 0);
+	delta0 = get_src_reg(c, inst, 1, 0);
+	delta1 = get_src_reg(c, inst, 1, 1);
 
 	interp3 = brw_vec1_grf(src0.nr+1, 4);
 	/* Calc 1/w - just linterp wpos[3] optimized by putting the
@@ -618,9 +624,9 @@ static void emit_linterp(struct brw_wm_compile *c,
     struct brw_reg src0;
     GLuint nr, i;
 
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
-    delta0 = get_src_reg(c, &inst->SrcReg[1], 0);
-    delta1 = get_src_reg(c, &inst->SrcReg[1], 1);
+    src0 = get_src_reg(c, inst, 0, 0);
+    delta0 = get_src_reg(c, inst, 1, 0);
+    delta1 = get_src_reg(c, inst, 1, 1);
     nr = src0.nr;
 
     interp[0] = brw_vec1_grf(nr, 0);
@@ -647,7 +653,7 @@ static void emit_cinterp(struct brw_wm_compile *c,
     struct brw_reg dst, src0;
     GLuint nr, i;
 
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
+    src0 = get_src_reg(c, inst, 0, 0);
     nr = src0.nr;
 
     interp[0] = brw_vec1_grf(nr, 0);
@@ -674,10 +680,10 @@ static void emit_pinterp(struct brw_wm_compile *c,
     struct brw_reg src0, w;
     GLuint nr, i;
 
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
-    delta0 = get_src_reg(c, &inst->SrcReg[1], 0);
-    delta1 = get_src_reg(c, &inst->SrcReg[1], 1);
-    w = get_src_reg(c, &inst->SrcReg[2], 3);
+    src0 = get_src_reg(c, inst, 0, 0);
+    delta0 = get_src_reg(c, inst, 1, 0);
+    delta1 = get_src_reg(c, inst, 1, 1);
+    w = get_src_reg(c, inst, 2, 3);
     nr = src0.nr;
 
     interp[0] = brw_vec1_grf(nr, 0);
@@ -738,11 +744,11 @@ static void emit_xpd(struct brw_wm_compile *c,
 	if (mask & (1<<i)) {
 	    struct brw_reg src0, src1, dst;
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = negate(get_src_reg(c, &inst->SrcReg[0], i2));
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i1);
+	    src0 = negate(get_src_reg(c, inst, 0, i2));
+	    src1 = get_src_reg_imm(c, inst, 1, i1);
 	    brw_MUL(p, brw_null_reg(), src0, src1);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i1);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i2);
+	    src0 = get_src_reg(c, inst, 0, i1);
+	    src1 = get_src_reg_imm(c, inst, 1, i2);
 	    brw_set_saturate(p, inst->SaturateMode != SATURATE_OFF);
 	    brw_MAC(p, dst, src0, src1);
 	    brw_set_saturate(p, 0);
@@ -758,8 +764,8 @@ static void emit_dp3(struct brw_wm_compile *c,
     int i;
     struct brw_compile *p = &c->func;
     for (i = 0; i < 3; i++) {
-	src0[i] = get_src_reg(c, &inst->SrcReg[0], i);
-	src1[i] = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	src0[i] = get_src_reg(c, inst, 0, i);
+	src1[i] = get_src_reg_imm(c, inst, 1, i);
     }
 
     dst = get_dst_reg(c, inst, get_scalar_dst_index(inst));
@@ -777,8 +783,8 @@ static void emit_dp4(struct brw_wm_compile *c,
     int i;
     struct brw_compile *p = &c->func;
     for (i = 0; i < 4; i++) {
-	src0[i] = get_src_reg(c, &inst->SrcReg[0], i);
-	src1[i] = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	src0[i] = get_src_reg(c, inst, 0, i);
+	src1[i] = get_src_reg_imm(c, inst, 1, i);
     }
     dst = get_dst_reg(c, inst, get_scalar_dst_index(inst));
     brw_MUL(p, brw_null_reg(), src0[0], src1[0]);
@@ -796,8 +802,8 @@ static void emit_dph(struct brw_wm_compile *c,
     int i;
     struct brw_compile *p = &c->func;
     for (i = 0; i < 4; i++) {
-	src0[i] = get_src_reg(c, &inst->SrcReg[0], i);
-	src1[i] = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	src0[i] = get_src_reg(c, inst, 0, i);
+	src1[i] = get_src_reg_imm(c, inst, 1, i);
     }
     dst = get_dst_reg(c, inst, get_scalar_dst_index(inst));
     brw_MUL(p, brw_null_reg(), src0[0], src1[0]);
@@ -824,7 +830,7 @@ static void emit_math1(struct brw_wm_compile *c,
     tmp = alloc_tmp(c);
 
     /* Get first component of source register */
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
+    src0 = get_src_reg(c, inst, 0, 0);
 
     /* tmp = func(src0) */
     brw_MOV(p, brw_message_reg(2), src0);
@@ -897,8 +903,8 @@ static void emit_add(struct brw_wm_compile *c,
     for (i = 0 ; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 	    brw_ADD(p, dst, src0, src1);
 	}
     }
@@ -913,7 +919,7 @@ static void emit_arl(struct brw_wm_compile *c,
     brw_set_saturate(p, (inst->SaturateMode != SATURATE_OFF) ? 1 : 0);
     addr_reg = brw_uw8_reg(BRW_ARCHITECTURE_REGISTER_FILE, 
                            BRW_ARF_ADDRESS, 0);
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0); /* channel 0 */
+    src0 = get_src_reg(c, inst, 0, 0); /* channel 0 */
     brw_MOV(p, addr_reg, src0);
     brw_set_saturate(p, 0);
 }
@@ -929,8 +935,8 @@ static void emit_sub(struct brw_wm_compile *c,
     for (i = 0 ; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 	    brw_ADD(p, dst, src0, negate(src1));
 	}
     }
@@ -948,8 +954,8 @@ static void emit_mul(struct brw_wm_compile *c,
     for (i = 0 ; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 	    brw_MUL(p, dst, src0, src1);
 	}
     }
@@ -967,7 +973,7 @@ static void emit_frc(struct brw_wm_compile *c,
     for (i = 0 ; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg_imm(c, &inst->SrcReg[0], i);
+	    src0 = get_src_reg_imm(c, inst, 0, i);
 	    brw_FRC(p, dst, src0);
 	}
     }
@@ -986,7 +992,7 @@ static void emit_flr(struct brw_wm_compile *c,
     for (i = 0 ; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg_imm(c, &inst->SrcReg[0], i);
+	    src0 = get_src_reg_imm(c, inst, 0, i);
 	    brw_RNDD(p, dst, src0);
 	}
     }
@@ -1004,8 +1010,8 @@ static void emit_max(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 	    brw_set_saturate(p, (inst->SaturateMode != SATURATE_OFF) ? 1 : 0);
 	    brw_MOV(p, dst, src0);
 	    brw_set_saturate(p, 0);
@@ -1032,8 +1038,8 @@ static void emit_min(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg_imm(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg_imm(c, inst, 0, i);
+	    src1 = get_src_reg(c, inst, 1, i);
 	    brw_set_saturate(p, (inst->SaturateMode != SATURATE_OFF) ? 1 : 0);
 	    brw_MOV(p, dst, src0);
 	    brw_set_saturate(p, 0);
@@ -1055,8 +1061,8 @@ static void emit_pow(struct brw_wm_compile *c,
     struct brw_compile *p = &c->func;
     struct brw_reg dst, src0, src1;
     dst = get_dst_reg(c, inst, get_scalar_dst_index(inst));
-    src0 = get_src_reg_imm(c, &inst->SrcReg[0], 0);
-    src1 = get_src_reg_imm(c, &inst->SrcReg[1], 0);
+    src0 = get_src_reg_imm(c, inst, 0, 0);
+    src1 = get_src_reg_imm(c, inst, 1, 0);
 
     brw_MOV(p, brw_message_reg(2), src0);
     brw_MOV(p, brw_message_reg(3), src1);
@@ -1082,9 +1088,9 @@ static void emit_lrp(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
+	    src0 = get_src_reg(c, inst, 0, i);
 
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 
 	    if (src1.nr == dst.nr) {
 		tmp1 = alloc_tmp(c);
@@ -1092,7 +1098,7 @@ static void emit_lrp(struct brw_wm_compile *c,
 	    } else
 		tmp1 = src1;
 
-	    src2 = get_src_reg(c, &inst->SrcReg[2], i);
+	    src2 = get_src_reg(c, inst, 2, i);
 	    if (src2.nr == dst.nr) {
 		tmp2 = alloc_tmp(c);
 		brw_MOV(p, tmp2, src2);
@@ -1135,9 +1141,9 @@ static void emit_mad(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
-	    src2 = get_src_reg_imm(c, &inst->SrcReg[2], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
+	    src2 = get_src_reg_imm(c, inst, 2, i);
 	    brw_MUL(p, dst, src0, src1);
 
 	    brw_set_saturate(p, (inst->SaturateMode != SATURATE_OFF) ? 1 : 0);
@@ -1158,8 +1164,8 @@ static void emit_sop(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) {
 	if (mask & (1<<i)) {
 	    dst = get_dst_reg(c, inst, i);
-	    src0 = get_src_reg(c, &inst->SrcReg[0], i);
-	    src1 = get_src_reg_imm(c, &inst->SrcReg[1], i);
+	    src0 = get_src_reg(c, inst, 0, i);
+	    src1 = get_src_reg_imm(c, inst, 1, i);
 	    brw_push_insn_state(p);
 	    brw_CMP(p, brw_null_reg(), cond, src0, src1);
 	    brw_set_predicate_control(p, BRW_PREDICATE_NONE);
@@ -1216,8 +1222,8 @@ static void emit_ddx(struct brw_wm_compile *c,
     struct brw_reg dst;
     struct brw_reg src0, w;
     GLuint nr, i;
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
-    w = get_src_reg(c, &inst->SrcReg[1], 3);
+    src0 = get_src_reg(c, inst, 0, 0);
+    w = get_src_reg(c, inst, 1, 3);
     nr = src0.nr;
     interp[0] = brw_vec1_grf(nr, 0);
     interp[1] = brw_vec1_grf(nr, 4);
@@ -1244,9 +1250,9 @@ static void emit_ddy(struct brw_wm_compile *c,
     struct brw_reg src0, w;
     GLuint nr, i;
 
-    src0 = get_src_reg(c, &inst->SrcReg[0], 0);
+    src0 = get_src_reg(c, inst, 0, 0);
     nr = src0.nr;
-    w = get_src_reg(c, &inst->SrcReg[1], 3);
+    w = get_src_reg(c, inst, 1, 3);
     interp[0] = brw_vec1_grf(nr, 0);
     interp[1] = brw_vec1_grf(nr, 4);
     interp[2] = brw_vec1_grf(nr+1, 0);
@@ -1388,7 +1394,7 @@ static void emit_noise1( struct brw_wm_compile *c,
 
     assert( mark == 0 );
     
-    src = get_src_reg( c, inst->SrcReg, 0 );
+    src = get_src_reg( c, inst, 0, 0 );
 
     param = alloc_tmp( c );
 
@@ -1558,8 +1564,8 @@ static void emit_noise2( struct brw_wm_compile *c,
 
     assert( mark == 0 );
     
-    src0 = get_src_reg( c, inst->SrcReg, 0 );
-    src1 = get_src_reg( c, inst->SrcReg, 1 );
+    src0 = get_src_reg( c, inst, 0, 0 );
+    src1 = get_src_reg( c, inst, 0, 1 );
 
     param0 = alloc_tmp( c );
     param1 = alloc_tmp( c );
@@ -1861,9 +1867,9 @@ static void emit_noise3( struct brw_wm_compile *c,
 
     assert( mark == 0 );
     
-    src0 = get_src_reg( c, inst->SrcReg, 0 );
-    src1 = get_src_reg( c, inst->SrcReg, 1 );
-    src2 = get_src_reg( c, inst->SrcReg, 2 );
+    src0 = get_src_reg( c, inst, 0, 0 );
+    src1 = get_src_reg( c, inst, 0, 1 );
+    src2 = get_src_reg( c, inst, 0, 2 );
 
     param0 = alloc_tmp( c );
     param1 = alloc_tmp( c );
@@ -2284,10 +2290,10 @@ static void emit_noise4( struct brw_wm_compile *c,
 
     assert( mark == 0 );
     
-    src0 = get_src_reg( c, inst->SrcReg, 0 );
-    src1 = get_src_reg( c, inst->SrcReg, 1 );
-    src2 = get_src_reg( c, inst->SrcReg, 2 );
-    src3 = get_src_reg( c, inst->SrcReg, 3 );
+    src0 = get_src_reg( c, inst, 0, 0 );
+    src1 = get_src_reg( c, inst, 0, 1 );
+    src2 = get_src_reg( c, inst, 0, 2 );
+    src3 = get_src_reg( c, inst, 0, 3 );
 
     param0 = alloc_tmp( c );
     param1 = alloc_tmp( c );
@@ -2325,8 +2331,8 @@ static void emit_wpos_xy(struct brw_wm_compile *c,
     dst[0] = get_dst_reg(c, inst, 0);
     dst[1] = get_dst_reg(c, inst, 1);
 
-    src0[0] = get_src_reg(c, &inst->SrcReg[0], 0);
-    src0[1] = get_src_reg(c, &inst->SrcReg[0], 1);
+    src0[0] = get_src_reg(c, inst, 0, 0);
+    src0[1] = get_src_reg(c, inst, 0, 1);
 
     /* Calculate the pixel offset from window bottom left into destination
      * X and Y channels.
@@ -2364,7 +2370,7 @@ static void emit_txb(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) 
 	dst[i] = get_dst_reg(c, inst, i);
     for (i = 0; i < 4; i++)
-	src[i] = get_src_reg(c, &inst->SrcReg[0], i);
+	src[i] = get_src_reg(c, inst, 0, i);
 
     switch (inst->TexSrcTarget) {
 	case TEXTURE_1D_INDEX:
@@ -2416,7 +2422,7 @@ static void emit_tex(struct brw_wm_compile *c,
     for (i = 0; i < 4; i++) 
 	dst[i] = get_dst_reg(c, inst, i);
     for (i = 0; i < 4; i++)
-	src[i] = get_src_reg(c, &inst->SrcReg[0], i);
+	src[i] = get_src_reg(c, inst, 0, i);
 
     switch (inst->TexSrcTarget) {
 	case TEXTURE_1D_INDEX: