From a0d6b506cdb1faa74d53fcb9d93de49985bc3e95 Mon Sep 17 00:00:00 2001
From: Brian <brian@yutani.localnet.net>
Date: Thu, 21 Dec 2006 10:47:28 -0700
Subject: [PATCH] added IR_NEG for negation

---
 src/mesa/shader/slang/slang_codegen.c |  1 +
 src/mesa/shader/slang/slang_emit.c    | 37 +++++++++++++++++++++++++++
 src/mesa/shader/slang/slang_ir.h      |  3 ++-
 3 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index a2be0435427..0f7a5a4cb69 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -84,6 +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 },
    /* float binary op */
    { "float_add", IR_ADD, 1, 2 },
    { "float_subtract", IR_SUB, 1, 2 },
diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 39f470046b7..cc522131cef 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -78,6 +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_SIN, "IR_SIN", OPCODE_SIN, 1, 1 },
    { IR_COS, "IR_COS", OPCODE_COS, 1, 1 },
    /* other */
@@ -936,6 +937,40 @@ 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
+   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);
+
+   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->Comment = n->Comment;
+
+   return inst;
+#endif
+   /* XXX this is something we can optimize for, with a bit of work.*/
+   abort();
+   return NULL;
+#endif
+}
+
+
 static struct prog_instruction *
 emit_label(const char *target, struct gl_program *prog)
 {
@@ -1084,6 +1119,8 @@ emit(slang_gen_context *gc, slang_ir_node *n, struct gl_program *prog)
    case IR_SIN:
    case IR_COS:
       return emit_unop(gc, n, prog);
+   case IR_NEG:
+      return emit_negation(gc, n, prog):
    case IR_LABEL:
       return emit_label(n->Target, prog);
    case IR_FLOAT:
diff --git a/src/mesa/shader/slang/slang_ir.h b/src/mesa/shader/slang/slang_ir.h
index 188d7d96d34..7c5e0448618 100644
--- a/src/mesa/shader/slang/slang_ir.h
+++ b/src/mesa/shader/slang/slang_ir.h
@@ -72,7 +72,8 @@ typedef enum
    IR_RCP,     /* recipricol */
    IR_FLOOR,
    IR_FRAC,
-   IR_ABS,
+   IR_ABS,     /* absolute value */
+   IR_NEG,     /* negate */
    IR_SIN,     /* sine */
    IR_COS,     /* cosine */
    IR_NOT,     /* logical not */
-- 
2.30.2