program: Remove unused emit_scs().

Was only used by the sin_reduced/cos_reduced cases, which themselves
were impossible to reach.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

diff --git a/src/mesa/program/ir_to_mesa.cpp b/src/mesa/program/ir_to_mesa.cpp
index 3a78dc4f0e39c0b29e61f60290ddb7774d4f3f4d..3dcb53702a55df2eb5fd2b5e57bd590fc3351b0a 100644 (file)
--- a/src/mesa/program/ir_to_mesa.cpp
+++ b/src/mesa/program/ir_to_mesa.cpp
@@ -303,9 +303,6 @@ public:
    void emit_scalar(ir_instruction *ir, enum prog_opcode op,
                    dst_reg dst, src_reg src0, src_reg src1);
 
-   void emit_scs(ir_instruction *ir, enum prog_opcode op,
-                dst_reg dst, const src_reg &src);
-
    bool try_emit_mad(ir_expression *ir,
                          int mul_operand);
    bool try_emit_mad_for_and_not(ir_expression *ir,
@@ -479,101 +476,6 @@ ir_to_mesa_visitor::emit_scalar(ir_instruction *ir, enum prog_opcode op,
    emit_scalar(ir, op, dst, src0, undef);
 }
 
-/**
- * Emit an OPCODE_SCS instruction
- *
- * The \c SCS opcode functions a bit differently than the other Mesa (or
- * ARB_fragment_program) opcodes.  Instead of splatting its result across all
- * four components of the destination, it writes one value to the \c x
- * component and another value to the \c y component.
- *
- * \param ir        IR instruction being processed
- * \param op        Either \c OPCODE_SIN or \c OPCODE_COS depending on which
- *                  value is desired.
- * \param dst       Destination register
- * \param src       Source register
- */
-void
-ir_to_mesa_visitor::emit_scs(ir_instruction *ir, enum prog_opcode op,
-                            dst_reg dst,
-                            const src_reg &src)
-{
-   /* Vertex programs cannot use the SCS opcode.
-    */
-   if (this->prog->Target == GL_VERTEX_PROGRAM_ARB) {
-      emit_scalar(ir, op, dst, src);
-      return;
-   }
-
-   const unsigned component = (op == OPCODE_SIN) ? 0 : 1;
-   const unsigned scs_mask = (1U << component);
-   int done_mask = ~dst.writemask;
-   src_reg tmp;
-
-   assert(op == OPCODE_SIN || op == OPCODE_COS);
-
-   /* If there are compnents in the destination that differ from the component
-    * that will be written by the SCS instrution, we'll need a temporary.
-    */
-   if (scs_mask != unsigned(dst.writemask)) {
-      tmp = get_temp(glsl_type::vec4_type);
-   }
-
-   for (unsigned i = 0; i < 4; i++) {
-      unsigned this_mask = (1U << i);
-      src_reg src0 = src;
-
-      if ((done_mask & this_mask) != 0)
-        continue;
-
-      /* The source swizzle specified which component of the source generates
-       * sine / cosine for the current component in the destination.  The SCS
-       * instruction requires that this value be swizzle to the X component.
-       * Replace the current swizzle with a swizzle that puts the source in
-       * the X component.
-       */
-      unsigned src0_swiz = GET_SWZ(src.swizzle, i);
-
-      src0.swizzle = MAKE_SWIZZLE4(src0_swiz, src0_swiz,
-                                  src0_swiz, src0_swiz);
-      for (unsigned j = i + 1; j < 4; j++) {
-        /* If there is another enabled component in the destination that is
-         * derived from the same inputs, generate its value on this pass as
-         * well.
-         */
-        if (!(done_mask & (1 << j)) &&
-            GET_SWZ(src0.swizzle, j) == src0_swiz) {
-           this_mask |= (1 << j);
-        }
-      }
-
-      if (this_mask != scs_mask) {
-        ir_to_mesa_instruction *inst;
-        dst_reg tmp_dst = dst_reg(tmp);
-
-        /* Emit the SCS instruction.
-         */
-        inst = emit(ir, OPCODE_SCS, tmp_dst, src0);
-        inst->dst.writemask = scs_mask;
-
-        /* Move the result of the SCS instruction to the desired location in
-         * the destination.
-         */
-        tmp.swizzle = MAKE_SWIZZLE4(component, component,
-                                    component, component);
-        inst = emit(ir, OPCODE_SCS, dst, tmp);
-        inst->dst.writemask = this_mask;
-      } else {
-        /* Emit the SCS instruction to write directly to the destination.
-         */
-        ir_to_mesa_instruction *inst = emit(ir, OPCODE_SCS, dst, src0);
-        inst->dst.writemask = scs_mask;
-      }
-
-      done_mask |= this_mask;
-   }
-}
-
 src_reg
 ir_to_mesa_visitor::src_reg_for_float(float val)
 {