r600g: Simplify some swizzle lookups.

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 4146cb3c5fdecd2c8260441070fada12250bc49d..546e21d6da3e069790021b15934009e380bb45b5 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -1722,37 +1722,15 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
        }
 
        if (inst->Texture.Texture == TGSI_TEXTURE_CUBE) {
-               int src_chan, src2_chan;
+               static const unsigned src0_swizzle[] = {2, 2, 0, 1};
+               static const unsigned src1_swizzle[] = {1, 0, 2, 2};
 
                /* tmp1.xyzw = CUBE(R0.zzxy, R0.yxzz) */
                for (i = 0; i < 4; i++) {
                        memset(&alu, 0, sizeof(struct r600_bc_alu));
                        alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_CUBE);
-                       switch (i) {
-                       case 0:
-                               src_chan = 2;
-                               src2_chan = 1;
-                               break;
-                       case 1:
-                               src_chan = 2;
-                               src2_chan = 0;
-                               break;
-                       case 2:
-                               src_chan = 0;
-                               src2_chan = 2;
-                               break;
-                       case 3:
-                               src_chan = 1;
-                               src2_chan = 2;
-                               break;
-                       default:
-                               assert(0);
-                               src_chan = 0;
-                               src2_chan = 0;
-                               break;
-                       }
-                       r600_bc_src(&alu.src[0], &ctx->src[0], src_chan);
-                       r600_bc_src(&alu.src[1], &ctx->src[0], src2_chan);
+                       r600_bc_src(&alu.src[0], &ctx->src[0], src0_swizzle[i]);
+                       r600_bc_src(&alu.src[1], &ctx->src[0], src1_swizzle[i]);
                        alu.dst.sel = ctx->temp_reg;
                        alu.dst.chan = i;
                        if (i == 3)
@@ -2027,6 +2005,8 @@ static int tgsi_cmp(struct r600_shader_ctx *ctx)
 static int tgsi_xpd(struct r600_shader_ctx *ctx)
 {
        struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+       static const unsigned int src0_swizzle[] = {2, 0, 1};
+       static const unsigned int src1_swizzle[] = {1, 2, 0};
        struct r600_bc_alu alu;
        uint32_t use_temp = 0;
        int i, r;
@@ -2037,33 +2017,12 @@ static int tgsi_xpd(struct r600_shader_ctx *ctx)
        for (i = 0; i < 4; i++) {
                memset(&alu, 0, sizeof(struct r600_bc_alu));
                alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MUL);
-
-               switch (i) {
-               case 0:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 2);
-                       break;
-               case 1:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 0);
-                       break;
-               case 2:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 1);
-                       break;
-               case 3:
+               if (i < 3) {
+                       r600_bc_src(&alu.src[0], &ctx->src[0], src0_swizzle[i]);
+                       r600_bc_src(&alu.src[1], &ctx->src[1], src1_swizzle[i]);
+               } else {
                        alu.src[0].sel = V_SQ_ALU_SRC_0;
                        alu.src[0].chan = i;
-               }
-
-               switch (i) {
-               case 0:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 1);
-                       break;
-               case 1:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 2);
-                       break;
-               case 2:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 0);
-                       break;
-               case 3:
                        alu.src[1].sel = V_SQ_ALU_SRC_0;
                        alu.src[1].chan = i;
                }
@@ -2083,32 +2042,12 @@ static int tgsi_xpd(struct r600_shader_ctx *ctx)
                memset(&alu, 0, sizeof(struct r600_bc_alu));
                alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP3_SQ_OP3_INST_MULADD);
 
-               switch (i) {
-               case 0:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 1);
-                       break;
-               case 1:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 2);
-                       break;
-               case 2:
-                       r600_bc_src(&alu.src[0], &ctx->src[0], 0);
-                       break;
-               case 3:
+               if (i < 3) {
+                       r600_bc_src(&alu.src[0], &ctx->src[0], src1_swizzle[i]);
+                       r600_bc_src(&alu.src[1], &ctx->src[1], src0_swizzle[i]);
+               } else {
                        alu.src[0].sel = V_SQ_ALU_SRC_0;
                        alu.src[0].chan = i;
-               }
-
-               switch (i) {
-               case 0:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 2);
-                       break;
-               case 1:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 0);
-                       break;
-               case 2:
-                       r600_bc_src(&alu.src[1], &ctx->src[1], 1);
-                       break;
-               case 3:
                        alu.src[1].sel = V_SQ_ALU_SRC_0;
                        alu.src[1].chan = i;
                }