summaryrefslogtreecommitdiff
path: root/src/mesa
diff options
context:
space:
mode:
authorBrian <brian.paul@tungstengraphics.com>2007-07-24 14:45:57 -0600
committerBrian <brian.paul@tungstengraphics.com>2007-07-24 14:45:57 -0600
commit6a235d3fe5ccaa8cd0d4a2f3356c1513006dadcb (patch)
tree3b41cb802faeadbcec158965bf582d7761b67687 /src/mesa
parent8c99f7ba61fcc95ef22d8ccd8cce3e31eaa67757 (diff)
comments
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
index 291e62d262..dc25bac4ea 100644
--- a/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
+++ b/src/mesa/pipe/tgsi/mesa/mesa_to_tgsi.c
@@ -31,22 +31,34 @@ map_register_file(
}
}
-/*
+/**
* Map mesa register file index to SBIR index.
* Take special care when processing input and output indices.
+ * \param processor either TGSI_PROCESSOR_FRAGMENT or TGSI_PROCESSOR_VERTEX
+ * \param file one of TGSI_FILE_x
+ * \param index the mesa register file index
+ * \param usage_bitmask ???
*/
static GLuint
map_register_file_index(
GLuint processor,
GLuint file,
GLuint index,
- GLuint usage_bitmask )
+ GLbitfield usage_bitmask )
{
GLuint mapped_index;
GLuint i;
switch( file ) {
case TGSI_FILE_INPUT:
+ /*
+ * The fragment/vertex program input indexes (FRAG/VERT_ATTRIB_x) get
+ * mapped to a packed sequence of integers.
+ * If a program uses one input attribute, the mapped index will be 1.
+ * If a program uses two input attribs, the mapped indexes will be 1,2.
+ * If a program uses 3 input attribs, the mapped indexes will be 1,2,3.
+ * etc.
+ */
assert( index < 32 );
assert( usage_bitmask & (1 << index) );
mapped_index = 0;
@@ -55,11 +67,15 @@ map_register_file_index(
mapped_index++;
}
}
+ printf("Map input %d to %d\n", index, mapped_index);
break;
case TGSI_FILE_OUTPUT:
- assert( usage_bitmask == 0 );
+ assert( usage_bitmask == 0x0 );
if( processor == TGSI_PROCESSOR_FRAGMENT ) {
+ /* depth result -> index 0
+ * color results -> index 1, 2, ...
+ */
if( index == FRAG_RESULT_DEPR ) {
mapped_index = 0;
}
@@ -69,6 +85,7 @@ map_register_file_index(
}
}
else {
+ /* mapped_index = VERT_RESULT_x */
mapped_index = index;
}
break;
@@ -137,7 +154,7 @@ convert_writemask(
static GLboolean
compile_instruction(
- struct prog_instruction *inst,
+ const struct prog_instruction *inst,
struct tgsi_full_instruction *fullinst,
GLuint inputs_read,
GLuint processor )
@@ -158,7 +175,7 @@ compile_instruction(
processor,
fulldst->DstRegister.File,
inst->DstReg.Index,
- 0 );
+ 0x0 );
fulldst->DstRegister.WriteMask = convert_writemask( inst->DstReg.WriteMask );
for( i = 0; i < fullinst->Instruction.NumSrcRegs; i++ ) {