From ee3d0617f923cd4bcc8bfdc1ce878648480c2679 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <darktama@iinet.net.au>
Date: Sun, 21 Jan 2007 09:13:27 +1100
Subject: [PATCH] nouveau: shader backend branching support for all cards that
 support it.

---
 src/mesa/drivers/dri/nouveau/nouveau_shader.h |  5 +++
 src/mesa/drivers/dri/nouveau/nv30_vertprog.c  |  7 +++
 src/mesa/drivers/dri/nouveau/nv40_fragprog.c  | 45 +++++++++++++++++++
 src/mesa/drivers/dri/nouveau/nv40_vertprog.c  | 10 +++++
 4 files changed, 67 insertions(+)

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_shader.h b/src/mesa/drivers/dri/nouveau/nouveau_shader.h
index 08cb7817cf0..dfa53cad957 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_shader.h
+++ b/src/mesa/drivers/dri/nouveau/nouveau_shader.h
@@ -275,6 +275,11 @@ struct _nvsFunc {
    void		(*SetSaturate)		(nvsFunc *);
    void		(*SetLastInst)		(nvsFunc *);
 
+   void		(*SetBranchTarget)	(nvsFunc *, int addr);
+   void		(*SetBranchElse)	(nvsFunc *, int addr);
+   void		(*SetBranchEnd)		(nvsFunc *, int addr);
+   void		(*SetLoopParams)	(nvsFunc *, int cnt, int init, int inc);
+
    int		(*HasMergedInst)	(nvsFunc *);
    int		(*IsLastInst)		(nvsFunc *);
    int		(*GetOffsetNext)	(nvsFunc *);
diff --git a/src/mesa/drivers/dri/nouveau/nv30_vertprog.c b/src/mesa/drivers/dri/nouveau/nv30_vertprog.c
index 6ba8e35d55f..0b7678f55d5 100644
--- a/src/mesa/drivers/dri/nouveau/nv30_vertprog.c
+++ b/src/mesa/drivers/dri/nouveau/nv30_vertprog.c
@@ -48,6 +48,12 @@ NV30VPUpdateConst(GLcontext *ctx, nouveauShader *nvs, int id)
 /*****************************************************************************
  * Assembly routines
  */
+static void
+NV30VPSetBranchTarget(nvsFunc *shader, int addr)
+{
+	shader->inst[2] &= ~NV30_VP_INST_IADDR_MASK;
+	shader->inst[2] |= (addr << NV30_VP_INST_IADDR_SHIFT);
+}
 
 /*****************************************************************************
  * Disassembly routines
@@ -349,5 +355,6 @@ NV30VPInitShaderFuncs(nvsFunc * shader)
    shader->GetCondRegID		= NV30VPGetCondRegID;
 
    shader->GetBranch		= NV30VPGetBranch;
+   shader->SetBranchTarget	= NV30VPSetBranchTarget;
 }
 
diff --git a/src/mesa/drivers/dri/nouveau/nv40_fragprog.c b/src/mesa/drivers/dri/nouveau/nv40_fragprog.c
index 3d58d6b6667..8bca6ae9383 100644
--- a/src/mesa/drivers/dri/nouveau/nv40_fragprog.c
+++ b/src/mesa/drivers/dri/nouveau/nv40_fragprog.c
@@ -5,6 +5,47 @@
 unsigned int NVFP_TX_BOP_COUNT = 5;
 struct _op_xlat NVFP_TX_BOP[64];
 
+
+/*****************************************************************************
+ * Assembly routines
+ * 	- These extend the NV30 routines, which are almost identical.  NV40
+ * 	  just has branching hacked into the instruction set.
+ */
+static void
+NV40FPSetBranchTarget(nvsFunc *shader, int addr)
+{
+	shader->inst[2] &= ~NV40_FP_OP_IADDR_MASK;
+	shader->inst[2] |= (addr << NV40_FP_OP_IADDR_SHIFT);
+}
+
+static void
+NV40FPSetBranchElse(nvsFunc *shader, int addr)
+{
+	shader->inst[2] &= ~NV40_FP_OP_ELSE_ID_MASK;
+	shader->inst[2] |= (addr << NV40_FP_OP_ELSE_ID_SHIFT);
+}
+
+static void
+NV40FPSetBranchEnd(nvsFunc *shader, int addr)
+{
+	shader->inst[3] &= ~NV40_FP_OP_END_ID_MASK;
+	shader->inst[3] |= (addr << NV40_FP_OP_END_ID_SHIFT);
+}
+
+static void
+NV40FPSetLoopParams(nvsFunc *shader, int count, int initial, int increment)
+{
+	shader->inst[2] &= ~(NV40_FP_OP_LOOP_COUNT_MASK |
+			     NV40_FP_OP_LOOP_INDEX_MASK |
+			     NV40_FP_OP_LOOP_INCR_MASK);
+	shader->inst[2] |= ((count     << NV40_FP_OP_LOOP_COUNT_SHIFT) |
+			    (initial   << NV40_FP_OP_LOOP_INDEX_SHIFT) |
+			    (increment << NV40_FP_OP_LOOP_INCR_SHIFT));
+}
+
+/*****************************************************************************
+ * Disassembly routines
+ */
 static struct _op_xlat *
 NV40FPGetOPTXRec(nvsFunc * shader, int merged)
 {
@@ -149,4 +190,8 @@ NV40FPInitShaderFuncs(nvsFunc * shader)
    shader->GetLoopCount		= NV40FPGetLoopCount;
    shader->GetLoopInitial	= NV40FPGetLoopInitial;
    shader->GetLoopIncrement	= NV40FPGetLoopIncrement;
+   shader->SetBranchTarget	= NV40FPSetBranchTarget;
+   shader->SetBranchElse	= NV40FPSetBranchElse;
+   shader->SetBranchEnd		= NV40FPSetBranchEnd;
+   shader->SetLoopParams	= NV40FPSetLoopParams;
 }
diff --git a/src/mesa/drivers/dri/nouveau/nv40_vertprog.c b/src/mesa/drivers/dri/nouveau/nv40_vertprog.c
index 0493e184033..1ba1cfd1555 100644
--- a/src/mesa/drivers/dri/nouveau/nv40_vertprog.c
+++ b/src/mesa/drivers/dri/nouveau/nv40_vertprog.c
@@ -227,6 +227,15 @@ NV40VPSetSource(nvsFunc *shader, nvsRegister * src, int pos)
    }
 }
 
+static void
+NV40VPSetBranchTarget(nvsFunc *shader, int addr)
+{
+	shader->inst[2] &= ~NV40_VP_INST_IADDRH_MASK;
+	shader->inst[2] |= ((addr & 0xf8) >> 3) << NV40_VP_INST_IADDRH_SHIFT;
+	shader->inst[3] &= ~NV40_VP_INST_IADDRL_MASK;
+	shader->inst[3] |= ((addr & 0x07) << NV40_VP_INST_IADDRL_SHIFT);
+}
+
 static void
 NV40VPInitInstruction(nvsFunc *shader)
 {
@@ -657,6 +666,7 @@ NV40VPInitShaderFuncs(nvsFunc * shader)
    shader->SetResult		= NV40VPSetResult;
    shader->SetSource		= NV40VPSetSource;
    shader->SetLastInst		= NV40VPSetLastInst;
+   shader->SetBranchTarget	= NV40VPSetBranchTarget;
 
    shader->HasMergedInst	= NV40VPHasMergedInst;
    shader->GetOpcodeHW		= NV40VPGetOpcodeHW;
-- 
2.30.2