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st/mesa: translate shader system inputs

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This commit is contained in:
Brian Paul 2010-12-08 19:01:15 -07:00
parent 2d62fb6c3f
commit 2b5e1e5287
1 changed files with 27 additions and 0 deletions
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27
src/mesa/state_tracker/st_mesa_to_tgsi.c
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@ -72,6 +72,7 @@ struct st_translate {
struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
struct ureg_dst address[1];
struct ureg_src samplers[PIPE_MAX_SAMPLERS];
struct ureg_src systemValues[SYSTEM_VALUE_MAX];
/* Extra info for handling point size clamping in vertex shader */
struct ureg_dst pointSizeResult; /**< Actual point size output register */
@ -104,6 +105,13 @@ struct st_translate {
};
/** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
static unsigned mesa_sysval_to_semantic[SYSTEM_VALUE_MAX] = {
TGSI_SEMANTIC_FACE,
TGSI_SEMANTIC_INSTANCEID
};
/**
* Make note of a branch to a label in the TGSI code.
* After we've emitted all instructions, we'll go over the list
@ -245,6 +253,10 @@ src_register( struct st_translate *t,
case PROGRAM_ADDRESS:
return ureg_src(t->address[index]);
case PROGRAM_SYSTEM_VALUE:
assert(index < Elements(t->systemValues));
return t->systemValues[index];
default:
debug_assert( 0 );
return ureg_src_undef();
@ -1076,6 +1088,21 @@ st_translate_mesa_program(
t->address[0] = ureg_DECL_address( ureg );
}
/* Declare misc input registers
*/
{
GLbitfield sysInputs = program->SystemValuesRead;
unsigned numSys = 0;
for (i = 0; sysInputs; i++) {
if (sysInputs & (1 << i)) {
unsigned semName = mesa_sysval_to_semantic[i];
t->systemValues[i] = ureg_DECL_system_value(ureg, numSys, semName, 0);
numSys++;
sysInputs &= ~(1 << i);
}
}
}
if (program->IndirectRegisterFiles & (1 << PROGRAM_TEMPORARY)) {
/* If temps are accessed with indirect addressing, declare temporaries
* in sequential order. Else, we declare them on demand elsewhere.