From 83ced5a918fd597fe2cb2991ff9732920354718c Mon Sep 17 00:00:00 2001
From: José Fonseca <jfonseca@vmware.com>
Date: Thu, 1 Jul 2010 10:14:46 +0100
Subject: llvmpipe: Remove lp_build_swizzle2_aos().

Unnecessary special case.
---
 src/gallium/auxiliary/gallivm/lp_bld_swizzle.c  | 49 -------------------------
 src/gallium/auxiliary/gallivm/lp_bld_swizzle.h  | 12 ------
 src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | 41 ++++++++++-----------
 3 files changed, 19 insertions(+), 83 deletions(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
index 3c8a7bc09e..53705fa082 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.c
@@ -205,55 +205,6 @@ lp_build_swizzle1_aos(struct lp_build_context *bld,
 }
 
 
-LLVMValueRef
-lp_build_swizzle2_aos(struct lp_build_context *bld,
-                      LLVMValueRef a,
-                      LLVMValueRef b,
-                      const unsigned char swizzle[4])
-{
-   const unsigned n = bld->type.length;
-   unsigned i, j;
-
-   if(swizzle[0] < 4 && swizzle[1] < 4 && swizzle[2] < 4 && swizzle[3] < 4)
-      return lp_build_swizzle1_aos(bld, a, swizzle);
-
-   if(a == b) {
-      unsigned char swizzle1[4];
-      swizzle1[0] = swizzle[0] % 4;
-      swizzle1[1] = swizzle[1] % 4;
-      swizzle1[2] = swizzle[2] % 4;
-      swizzle1[3] = swizzle[3] % 4;
-      return lp_build_swizzle1_aos(bld, a, swizzle1);
-   }
-
-   if(swizzle[0] % 4 == 0 &&
-      swizzle[1] % 4 == 1 &&
-      swizzle[2] % 4 == 2 &&
-      swizzle[3] % 4 == 3) {
-      boolean cond[4];
-      cond[0] = swizzle[0] / 4;
-      cond[1] = swizzle[1] / 4;
-      cond[2] = swizzle[2] / 4;
-      cond[3] = swizzle[3] / 4;
-      return lp_build_select_aos(bld, a, b, cond);
-   }
-
-   {
-      /*
-       * Shuffle.
-       */
-      LLVMTypeRef elem_type = LLVMInt32Type();
-      LLVMValueRef shuffles[LP_MAX_VECTOR_LENGTH];
-
-      for(j = 0; j < n; j += 4)
-         for(i = 0; i < 4; ++i)
-            shuffles[j + i] = LLVMConstInt(elem_type, j + (swizzle[i] % 4) + (swizzle[i] / 4 * n), 0);
-
-      return LLVMBuildShuffleVector(bld->builder, a, b, LLVMConstVector(shuffles, n), "");
-   }
-}
-
-
 /**
  * Extended swizzle of a single channel of a SoA vector.
  *
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.h b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.h
index 4f4fa777c9..509e97c0ae 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_swizzle.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_swizzle.h
@@ -76,18 +76,6 @@ lp_build_swizzle1_aos(struct lp_build_context *bld,
                       const unsigned char swizzle[4]);
 
 
-/**
- * Swizzle two vector consisting of an array of XYZW structs.
- *
- * @param swizzle is the in [0,8[ range. Values in [4,8[ range refer to b.
- */
-LLVMValueRef
-lp_build_swizzle2_aos(struct lp_build_context *bld,
-                      LLVMValueRef a,
-                      LLVMValueRef b,
-                      const unsigned char swizzle[4]);
-
-
 LLVMValueRef
 lp_build_swizzle_soa_channel(struct lp_build_context *bld,
                              const LLVMValueRef *unswizzled,
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
index 70d08e71f6..09e9833057 100644
--- a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
+++ b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c
@@ -190,30 +190,27 @@ lp_build_blend_swizzle(struct lp_build_blend_aos_context *bld,
                        enum lp_build_blend_swizzle rgb_swizzle,
                        unsigned alpha_swizzle)
 {
-   if(rgb == alpha) {
-      if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA)
-         return rgb;
-      if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA)
-         return lp_build_broadcast_aos(&bld->base, rgb, alpha_swizzle);
+   LLVMValueRef swizzled_rgb;
+
+   switch (rgb_swizzle) {
+   case LP_BUILD_BLEND_SWIZZLE_RGBA:
+      swizzled_rgb = rgb;
+      break;
+   case LP_BUILD_BLEND_SWIZZLE_AAAA:
+      swizzled_rgb = lp_build_broadcast_aos(&bld->base, rgb, alpha_swizzle);
+      break;
+   default:
+      assert(0);
+      swizzled_rgb = bld->base.undef;
    }
-   else {
-      if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_RGBA) {
-         boolean cond[4] = {0, 0, 0, 0};
-         cond[alpha_swizzle] = 1;
-         return lp_build_select_aos(&bld->base, alpha, rgb, cond);
-      }
-      if(rgb_swizzle == LP_BUILD_BLEND_SWIZZLE_AAAA) {
-         unsigned char swizzle[4];
-         swizzle[0] = alpha_swizzle;
-         swizzle[1] = alpha_swizzle;
-         swizzle[2] = alpha_swizzle;
-         swizzle[3] = alpha_swizzle;
-         swizzle[alpha_swizzle] += 4;
-         return lp_build_swizzle2_aos(&bld->base, rgb, alpha, swizzle);
-      }
+
+   if (rgb != alpha) {
+      boolean cond[4] = {0, 0, 0, 0};
+      cond[alpha_swizzle] = 1;
+      swizzled_rgb = lp_build_select_aos(&bld->base, alpha, swizzled_rgb, cond);
    }
-   assert(0);
-   return bld->base.undef;
+
+   return swizzled_rgb;
 }
 
 
-- 
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