[Mesa-dev] [PATCH 03/19] i965/fs: Combine fs_inst constructors using default parameters.

[Matt Turner]

Wouldn't it be nice if case labels could be non-constant expressions.
---
 src/mesa/drivers/dri/i965/brw_fs.cpp | 77 +++++++++++++-----------------------
 src/mesa/drivers/dri/i965/brw_fs.h   | 10 ++---
 2 files changed, 31 insertions(+), 56 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index b0d6e4e..bb2d290 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -74,69 +74,46 @@ fs_inst::fs_inst()
    this->opcode = BRW_OPCODE_NOP;
 }
 
-fs_inst::fs_inst(enum opcode opcode)
+fs_inst::fs_inst(enum opcode opcode, const fs_reg &dst,
+                 const fs_reg &src0, const fs_reg &src1, const fs_reg &src2)
 {
-   init();
-   this->opcode = opcode;
-}
+   if (&dst == &reg_undef)
+      assert(&src0 == &reg_undef);
+   if (&src0 == &reg_undef)
+      assert(&src1 == &reg_undef);
+   if (&src1 == &reg_undef)
+      assert(&src2 == &reg_undef);
 
-fs_inst::fs_inst(enum opcode opcode, fs_reg dst)
-{
    init();
-   this->opcode = opcode;
-   this->dst = dst;
 
-   if (dst.file == GRF)
-      assert(dst.reg_offset >= 0);
-}
+   if (&src2 != &reg_undef) {
+      goto src2;
+   } else if (&src1 != &reg_undef) {
+      goto src1;
+   } else if (&src0 != &reg_undef) {
+      goto src0;
+   } else if (&dst != &reg_undef) {
+      goto dst;
+   }
 
-fs_inst::fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0)
-{
-   init();
-   this->opcode = opcode;
-   this->dst = dst;
+src2:
+   this->src[2] = src2;
+   if (src[2].file == GRF)
+      assert(src[2].reg_offset >= 0);
+src1:
+   this->src[1] = src1;
+   if (src[1].file == GRF)
+      assert(src[1].reg_offset >= 0);
+src0:
    this->src[0] = src0;
-
-   if (dst.file == GRF)
-      assert(dst.reg_offset >= 0);
    if (src[0].file == GRF)
       assert(src[0].reg_offset >= 0);
-}
-
-fs_inst::fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1)
-{
-   init();
-   this->opcode = opcode;
+dst:
    this->dst = dst;
-   this->src[0] = src0;
-   this->src[1] = src1;
-
    if (dst.file == GRF)
       assert(dst.reg_offset >= 0);
-   if (src[0].file == GRF)
-      assert(src[0].reg_offset >= 0);
-   if (src[1].file == GRF)
-      assert(src[1].reg_offset >= 0);
-}
 
-fs_inst::fs_inst(enum opcode opcode, fs_reg dst,
-		 fs_reg src0, fs_reg src1, fs_reg src2)
-{
-   init();
    this->opcode = opcode;
-   this->dst = dst;
-   this->src[0] = src0;
-   this->src[1] = src1;
-   this->src[2] = src2;
-
-   if (dst.file == GRF)
-      assert(dst.reg_offset >= 0);
-   if (src[0].file == GRF)
-      assert(src[0].reg_offset >= 0);
-   if (src[1].file == GRF)
-      assert(src[1].reg_offset >= 0);
-   if (src[2].file == GRF)
-      assert(src[2].reg_offset >= 0);
 }
 
 fs_inst::fs_inst(const fs_inst &that)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h
index 8af4520..8e2af4f 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.h
+++ b/src/mesa/drivers/dri/i965/brw_fs.h
@@ -192,12 +192,10 @@ public:
    void init();
 
    fs_inst();
-   fs_inst(enum opcode opcode);
-   fs_inst(enum opcode opcode, fs_reg dst);
-   fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0);
-   fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1);
-   fs_inst(enum opcode opcode, fs_reg dst,
-           fs_reg src0, fs_reg src1,fs_reg src2);
+   fs_inst(enum opcode opcode, const fs_reg &dst = reg_undef,
+           const fs_reg &src0 = reg_undef,
+           const fs_reg &src1 = reg_undef,
+           const fs_reg &src2 = reg_undef);
    fs_inst(const fs_inst &that);
 
    bool equals(fs_inst *inst) const;
-- 
1.8.3.2