From aa710c3e6b17a4af54f2243de8888da4844d5c75 Mon Sep 17 00:00:00 2001
From: Brian <brian@yutani.localnet.net>
Date: Fri, 22 Dec 2006 10:18:50 -0700
Subject: implement unary +, -

---
 src/mesa/shader/slang/slang_codegen.c | 13 +++++++++++--
 src/mesa/shader/slang/slang_emit.c    | 27 ++++++++-------------------
 2 files changed, 19 insertions(+), 21 deletions(-)

(limited to 'src/mesa/shader/slang')

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index 0f7a5a4cb6..3fca45ce12 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -84,7 +84,7 @@ static slang_asm_info AsmInfo[] = {
    { "vec4_floor", IR_FLOOR, 1, 1 },
    { "vec4_frac", IR_FRAC, 1, 1 },
    { "vec4_abs", IR_ABS, 1, 1 },
-   { "vec4_neg", IR_NEG, 1, 1 },
+   { "vec4_negate", IR_NEG, 1, 1 },
    /* float binary op */
    { "float_add", IR_ADD, 1, 2 },
    { "float_subtract", IR_SUB, 1, 2 },
@@ -1426,7 +1426,16 @@ _slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper)
 	 n = _slang_gen_function_call_name(A, "/", oper, NULL);
 	 return n;
       }
-
+   case slang_oper_minus:
+      {
+         slang_ir_node *n;
+         assert(oper->num_children == 1);
+	 n = _slang_gen_function_call_name(A, "-", oper, NULL);
+	 return n;
+      }
+   case slang_oper_plus:
+      /* +expr   --> do nothing */
+      return _slang_gen_operation(A, &oper->children[0]);
    case slang_oper_variable_decl:
       return _slang_gen_declaration(A, oper);
    case slang_oper_assign:
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 2b631a3b72..8b0999dfcc 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -78,7 +78,7 @@ static slang_ir_info IrInfo[] = {
    { IR_FLOOR, "IR_FLOOR", OPCODE_FLR, 4, 1 },
    { IR_FRAC, "IR_FRAC", OPCODE_FRC, 4, 1 },
    { IR_ABS, "IR_ABS", OPCODE_ABS, 4, 1 },
-   { IR_NEG, "IR_NEG", OPCODE_NOP, 4, 1 },  /* XXX fix!!!! */
+   { IR_NEG, "IR_NEG", 0/*spec case*/, 4, 1 },
    { IR_SIN, "IR_SIN", OPCODE_SIN, 1, 1 },
    { IR_COS, "IR_COS", OPCODE_COS, 1, 1 },
    /* other */
@@ -921,7 +921,6 @@ emit_unop(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
    emit(gc, n->Children[0], prog);
 
    inst = new_instruction(prog, info->InstOpcode);
-   /*slang_resolve_storage(gc, n, prog);*/
 
    if (!n->Store)
       slang_alloc_temp_storage(gc, n, info->ResultSize);
@@ -940,34 +939,24 @@ emit_unop(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
 static struct prog_instruction *
 emit_negation(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
 {
-#if 0
+   /* Implement as MOV dst, -src; */
+   /* XXX we could look at the previous instruction and in some circumstances
+    * modify it to accomplish the negation.
+    */
    struct prog_instruction *inst;
-   const slang_ir_info *info = slang_find_ir_info(n->Opcode);
-   assert(info);
-
-   assert(info->NumParams == 1);
 
    emit(gc, n->Children[0], prog);
 
-   inst = new_instruction(prog, info->InstOpcode);
-   /*slang_resolve_storage(gc, n, prog);*/
-
    if (!n->Store)
-      slang_alloc_temp_storage(gc, n, info->ResultSize);
+      slang_alloc_temp_storage(gc, n, n->Children[0]->Store->Size);
 
+   inst = new_instruction(prog, OPCODE_MOV);
    storage_to_dst_reg(&inst->DstReg, n->Store, n->Writemask);
-
    storage_to_src_reg(&inst->SrcReg[0], n->Children[0]->Store,
                       n->Children[0]->Swizzle);
-
+   inst->SrcReg[0].NegateBase = NEGATE_XYZW;
    inst->Comment = n->Comment;
-
    return inst;
-#else
-   /* XXX this is something we can optimize for, with a bit of work.*/
-   abort();
-   return NULL;
-#endif
 }
 
 
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