r600g: implememt the LIT instruction

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index e865f013f71227a07b8282f6d7918a4a01b76c61..e5e6786fd04ec85bb6954ea3c9de5b64799d55c8 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -583,6 +583,124 @@ static int tgsi_slt(struct r600_shader_ctx *ctx)
        return 0;
 }
 
+static int tgsi_lit(struct r600_shader_ctx *ctx)
+{
+       struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+       struct r600_bc_alu alu;
+
+       int r;
+
+
+       if (inst->Dst[0].Register.WriteMask & (1 << 0))
+       {
+               /* dst.x, <- 1.0  */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV;
+               alu.src[0].sel  = 249; /*1.0*/
+               alu.src[0].chan = 0;
+               r = tgsi_dst(ctx, &inst->Dst[0], 0, &alu.dst);
+               if (r)
+                       return r;
+               if ((inst->Dst[0].Register.WriteMask & 0xe) == 0)
+                       alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+       }
+
+
+       if (inst->Dst[0].Register.WriteMask & (1 << 1))
+       {
+               /* dst.y = max(src.x, 0.0) */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MAX;
+               r = tgsi_src(ctx, &inst->Src[0], 0, &alu.src[0]);
+               if (r)
+                       return r;
+               alu.src[1].sel  = 248; /*0.0*/
+               alu.src[1].chan = 0;
+               r = tgsi_dst(ctx, &inst->Dst[0], 1, &alu.dst);
+               if (r)
+                       return r;
+               if ((inst->Dst[0].Register.WriteMask & 0xa) == 0)
+                       alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+       }
+
+       if (inst->Dst[0].Register.WriteMask & (1 << 3))
+       {
+               /* dst.w, <- 1.0  */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV;
+               alu.src[0].sel  = 249;
+               alu.src[0].chan = 0;
+               r = tgsi_dst(ctx, &inst->Dst[0], 3, &alu.dst);
+               if (r)
+                       return r;
+               if ((inst->Dst[0].Register.WriteMask & 0x4) == 0)
+                       alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+       }
+
+       if (inst->Dst[0].Register.WriteMask & (1 << 2))
+       {
+               /* dst.z = log(src.y) */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_LOG_CLAMPED;
+               r = tgsi_src(ctx, &inst->Src[0], 1, &alu.src[0]);
+               if (r)
+                       return r;
+               r = tgsi_dst(ctx, &inst->Dst[0], 2, &alu.dst);
+               if (r)
+                       return r;
+               alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+
+               int chan = alu.dst.chan;
+               int sel = alu.dst.sel;
+
+               /* tmp.x = amd MUL_LIT(src.w, dst.z, src.x ) */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP3_SQ_OP3_INST_MUL_LIT;
+               r = tgsi_src(ctx, &inst->Src[0], 3, &alu.src[0]);
+               if (r)
+               return r;
+               alu.src[1].sel  = sel;
+               alu.src[1].chan = chan;
+               r = tgsi_src(ctx, &inst->Src[0], 0, &alu.src[2]);
+               if (r)
+                       return r;
+               alu.dst.sel = ctx->temp_reg;
+               alu.dst.chan = 0;
+               alu.dst.write = 1;
+               alu.is_op3 = 1;
+               alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+
+               /* dst.z = exp(tmp.x) */
+               memset(&alu, 0, sizeof(struct r600_bc_alu));
+               alu.inst = V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_EXP_IEEE;
+               alu.src[0].sel = ctx->temp_reg;
+               alu.src[0].chan = 0;
+               r = tgsi_dst(ctx, &inst->Dst[0], 2, &alu.dst);
+               if (r)
+                       return r;
+               alu.last = 1;
+               r = r600_bc_add_alu(ctx->bc, &alu);
+               if (r)
+                       return r;
+       }
+       return 0;
+}
+
 static int tgsi_trans(struct r600_shader_ctx *ctx)
 {
        struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
@@ -735,7 +853,7 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
 static struct r600_shader_tgsi_instruction r600_shader_tgsi_instruction[] = {
        {TGSI_OPCODE_ARL,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_unsupported},
        {TGSI_OPCODE_MOV,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_MOV, tgsi_op2},
-       {TGSI_OPCODE_LIT,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_unsupported},
+       {TGSI_OPCODE_LIT,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_lit},
        {TGSI_OPCODE_RCP,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_unsupported},
        {TGSI_OPCODE_RSQ,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_RECIPSQRT_IEEE, tgsi_trans},
        {TGSI_OPCODE_EXP,       0, V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_NOP, tgsi_unsupported},