From a8c4242395b1bce0eac2a20243e5289414a9f511 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 30 May 2006 22:17:35 +0000
Subject: [PATCH] Define new NEGATE_* tokens for setting the src register's
 NegateBase field. Before, we were using GL_TRUE/GL_FALSE in a few places.
 Note: only the SWZ instruction can negate individual components.

---
 src/mesa/shader/nvfragparse.c         | 18 +++++++++---------
 src/mesa/shader/nvvertparse.c         | 10 +++++-----
 src/mesa/shader/program_instruction.h | 19 ++++++++++++++++---
 3 files changed, 30 insertions(+), 17 deletions(-)

diff --git a/src/mesa/shader/nvfragparse.c b/src/mesa/shader/nvfragparse.c
index e5a34205fbd..14de7cdd52b 100644
--- a/src/mesa/shader/nvfragparse.c
+++ b/src/mesa/shader/nvfragparse.c
@@ -983,16 +983,16 @@ Parse_VectorSrc(struct parse_state *parseState,
       srcReg->NegateAbs = (sign < 0.0F) ? GL_TRUE : GL_FALSE;
 
       if (Parse_String(parseState, "-"))
-         srcReg->NegateBase = 0xf;
+         srcReg->NegateBase = NEGATE_XYZW;
       else if (Parse_String(parseState, "+"))
-         srcReg->NegateBase = 0;
+         srcReg->NegateBase = NEGATE_NONE;
       else
-         srcReg->NegateBase = 0;
+         srcReg->NegateBase = NEGATE_NONE;
    }
    else {
       srcReg->Abs = GL_FALSE;
       srcReg->NegateAbs = GL_FALSE;
-      srcReg->NegateBase = (sign < 0.0F) ? 0xf : 0x0;
+      srcReg->NegateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
    }
 
    /* This should be the real src vector/register name */
@@ -1107,16 +1107,16 @@ Parse_ScalarSrcReg(struct parse_state *parseState,
       srcReg->NegateAbs = (sign < 0.0F) ? GL_TRUE : GL_FALSE;
 
       if (Parse_String(parseState, "-"))
-         srcReg->NegateBase = 0xf;
+         srcReg->NegateBase = NEGATE_XYZW;
       else if (Parse_String(parseState, "+"))
-         srcReg->NegateBase = 0x0;
+         srcReg->NegateBase = NEGATE_NONE;
       else
-         srcReg->NegateBase = 0x0;
+         srcReg->NegateBase = NEGATE_NONE;
    }
    else {
       srcReg->Abs = GL_FALSE;
       srcReg->NegateAbs = GL_FALSE;
-      srcReg->NegateBase = (sign < 0.0F) ? 0xf : 0x0;
+      srcReg->NegateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE;
    }
 
    if (!Peek_Token(parseState, token))
@@ -1241,7 +1241,7 @@ Parse_PrintInstruction(struct parse_state *parseState,
    }
 
    inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
-   inst->SrcReg[0].NegateBase = 0x0;
+   inst->SrcReg[0].NegateBase = NEGATE_NONE;
    inst->SrcReg[0].Abs = GL_FALSE;
    inst->SrcReg[0].NegateAbs = GL_FALSE;
 
diff --git a/src/mesa/shader/nvvertparse.c b/src/mesa/shader/nvvertparse.c
index a7e062c61cb..ebfe1fdeefd 100644
--- a/src/mesa/shader/nvvertparse.c
+++ b/src/mesa/shader/nvvertparse.c
@@ -642,12 +642,12 @@ Parse_SwizzleSrcReg(struct parse_state *parseState, struct prog_src_register *sr
       RETURN_ERROR;
    if (token[0] == '-') {
       (void) Parse_String(parseState, "-");
-      srcReg->NegateBase = GL_TRUE;
+      srcReg->NegateBase = NEGATE_XYZW;
       if (!Peek_Token(parseState, token))
          RETURN_ERROR;
    }
    else {
-      srcReg->NegateBase = GL_FALSE;
+      srcReg->NegateBase = NEGATE_NONE;
    }
 
    /* Src reg can be R<n>, c[n], c[n +/- offset], or a named vertex attrib */
@@ -735,13 +735,13 @@ Parse_ScalarSrcReg(struct parse_state *parseState, struct prog_src_register *src
    if (!Peek_Token(parseState, token))
       RETURN_ERROR;
    if (token[0] == '-') {
-      srcReg->NegateBase = GL_TRUE;
+      srcReg->NegateBase = NEGATE_XYZW;
       (void) Parse_String(parseState, "-"); /* consume '-' */
       if (!Peek_Token(parseState, token))
          RETURN_ERROR;
    }
    else {
-      srcReg->NegateBase = GL_FALSE;
+      srcReg->NegateBase = NEGATE_NONE;
    }
 
    /* Src reg can be R<n>, c[n], c[n +/- offset], or a named vertex attrib */
@@ -1070,7 +1070,7 @@ Parse_PrintInstruction(struct parse_state *parseState, struct prog_instruction *
          RETURN_ERROR;
 
       srcReg->RelAddr = GL_FALSE;
-      srcReg->NegateBase = GL_FALSE;
+      srcReg->NegateBase = NEGATE_NONE;
       srcReg->Swizzle = SWIZZLE_NOOP;
 
       /* Register can be R<n>, c[n], c[n +/- offset], a named vertex attrib,
diff --git a/src/mesa/shader/program_instruction.h b/src/mesa/shader/program_instruction.h
index 20886d9f021..93bcfc240a9 100644
--- a/src/mesa/shader/program_instruction.h
+++ b/src/mesa/shader/program_instruction.h
@@ -74,6 +74,19 @@
 /*@}*/
 
 
+/**
+ * Per-component negation masks
+ */
+/*@{*/
+#define NEGATE_X    0x1
+#define NEGATE_Y    0x2
+#define NEGATE_Z    0x4
+#define NEGATE_W    0x8
+#define NEGATE_XYZW 0xf
+#define NEGATE_NONE 0x0
+/*@}*/
+
+
 /**
  * Program instruction opcodes, for both vertex and fragment programs.
  * \note changes to this opcode list must be reflected in t_vb_arbprogram.c
@@ -173,7 +186,8 @@ struct prog_src_register
     */
    /*@{*/
    /**
-    * Per-component negation for the SWZ instruction.
+    * Per-component negation for the SWZ instruction.  For non-SWZ
+    * instructions the only possible values are NEGATE_XYZW and NEGATE_NONE.
     *
     * \since
     * ARB_vertex_program, ARB_fragment_program
@@ -190,8 +204,7 @@ struct prog_src_register
    GLuint Abs:1;
 
    /**
-    * Take the component-wise negation.  The negation occurs \b after the
-    * (optional) absolute value operation.
+    * Post-absolute value negation (all components).
     */
    GLuint NegateAbs:1;
    /*@}*/
-- 
2.30.2