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nir/spirv: pull out logic for getting builtin locations

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Also add support for more builtins.
This commit is contained in:
Connor Abbott 2015-07-04 10:49:12 -07:00
parent aca5fc6af1
commit 70d2336e7e
1 changed files with 107 additions and 62 deletions
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169
src/glsl/nir/spirv_to_nir.c
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@ -582,6 +582,104 @@ vtn_handle_constant(struct vtn_builder *b, SpvOp opcode,
}
}
static void
vtn_get_builtin_location(SpvBuiltIn builtin, int *location,
nir_variable_mode *mode)
{
switch (builtin) {
case SpvBuiltInPosition:
*location = VARYING_SLOT_POS;
*mode = nir_var_shader_out;
break;
case SpvBuiltInPointSize:
*location = VARYING_SLOT_PSIZ;
*mode = nir_var_shader_out;
break;
case SpvBuiltInClipVertex:
*location = VARYING_SLOT_CLIP_VERTEX;
*mode = nir_var_shader_out;
break;
case SpvBuiltInClipDistance:
*location = VARYING_SLOT_CLIP_DIST0; /* XXX CLIP_DIST1? */
*mode = nir_var_shader_in;
break;
case SpvBuiltInCullDistance:
/* XXX figure this out */
unreachable("unhandled builtin");
case SpvBuiltInVertexId:
*location = SYSTEM_VALUE_VERTEX_ID;
*mode = nir_var_system_value;
break;
case SpvBuiltInInstanceId:
*location = SYSTEM_VALUE_INSTANCE_ID;
*mode = nir_var_system_value;
break;
case SpvBuiltInPrimitiveId:
*location = VARYING_SLOT_PRIMITIVE_ID;
*mode = nir_var_shader_out;
break;
case SpvBuiltInInvocationId:
*location = SYSTEM_VALUE_INVOCATION_ID;
*mode = nir_var_system_value;
break;
case SpvBuiltInLayer:
*location = VARYING_SLOT_LAYER;
*mode = nir_var_shader_out;
break;
case SpvBuiltInTessLevelOuter:
case SpvBuiltInTessLevelInner:
case SpvBuiltInTessCoord:
case SpvBuiltInPatchVertices:
unreachable("no tessellation support");
case SpvBuiltInFragCoord:
*location = VARYING_SLOT_POS;
*mode = nir_var_shader_in;
break;
case SpvBuiltInPointCoord:
*location = VARYING_SLOT_PNTC;
*mode = nir_var_shader_out;
break;
case SpvBuiltInFrontFacing:
*location = VARYING_SLOT_FACE;
*mode = nir_var_shader_out;
break;
case SpvBuiltInSampleId:
*location = SYSTEM_VALUE_SAMPLE_ID;
*mode = nir_var_shader_in;
break;
case SpvBuiltInSamplePosition:
*location = SYSTEM_VALUE_SAMPLE_POS;
*mode = nir_var_shader_in;
break;
case SpvBuiltInSampleMask:
*location = SYSTEM_VALUE_SAMPLE_MASK_IN; /* XXX out? */
*mode = nir_var_shader_in;
break;
case SpvBuiltInFragColor:
*location = FRAG_RESULT_COLOR;
*mode = nir_var_shader_out;
break;
case SpvBuiltInFragDepth:
*location = FRAG_RESULT_DEPTH;
*mode = nir_var_shader_out;
break;
case SpvBuiltInHelperInvocation:
unreachable("unsupported builtin"); /* XXX */
break;
case SpvBuiltInNumWorkgroups:
case SpvBuiltInWorkgroupSize:
/* these are constants, need to be handled specially */
unreachable("unsupported builtin");
case SpvBuiltInWorkgroupId:
case SpvBuiltInLocalInvocationId:
case SpvBuiltInGlobalInvocationId:
case SpvBuiltInLocalInvocationIndex:
unreachable("no compute shader support");
default:
unreachable("unsupported builtin");
}
}
static void
var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
const struct vtn_decoration *dec, void *void_var)
@ -639,69 +737,16 @@ var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
case SpvDecorationDescriptorSet:
var->data.descriptor_set = dec->literals[0];
break;
case SpvDecorationBuiltIn:
var->data.mode = nir_var_system_value;
var->data.read_only = true;
switch ((SpvBuiltIn)dec->literals[0]) {
case SpvBuiltInFrontFacing:
var->data.location = SYSTEM_VALUE_FRONT_FACE;
break;
case SpvBuiltInVertexId:
var->data.location = SYSTEM_VALUE_VERTEX_ID;
break;
case SpvBuiltInInstanceId:
var->data.location = SYSTEM_VALUE_INSTANCE_ID;
break;
case SpvBuiltInSampleId:
var->data.location = SYSTEM_VALUE_SAMPLE_ID;
break;
case SpvBuiltInSamplePosition:
var->data.location = SYSTEM_VALUE_SAMPLE_POS;
break;
case SpvBuiltInSampleMask:
var->data.location = SYSTEM_VALUE_SAMPLE_MASK_IN;
break;
case SpvBuiltInInvocationId:
var->data.location = SYSTEM_VALUE_INVOCATION_ID;
break;
case SpvBuiltInPrimitiveId:
case SpvBuiltInPosition:
case SpvBuiltInPointSize:
case SpvBuiltInClipVertex:
case SpvBuiltInClipDistance:
case SpvBuiltInCullDistance:
case SpvBuiltInLayer:
case SpvBuiltInViewportIndex:
case SpvBuiltInTessLevelOuter:
case SpvBuiltInTessLevelInner:
case SpvBuiltInTessCoord:
case SpvBuiltInPatchVertices:
case SpvBuiltInFragCoord:
case SpvBuiltInPointCoord:
case SpvBuiltInFragColor:
case SpvBuiltInFragDepth:
case SpvBuiltInHelperInvocation:
case SpvBuiltInNumWorkgroups:
case SpvBuiltInWorkgroupSize:
case SpvBuiltInWorkgroupId:
case SpvBuiltInLocalInvocationId:
case SpvBuiltInGlobalInvocationId:
case SpvBuiltInLocalInvocationIndex:
case SpvBuiltInWorkDim:
case SpvBuiltInGlobalSize:
case SpvBuiltInEnqueuedWorkgroupSize:
case SpvBuiltInGlobalOffset:
case SpvBuiltInGlobalLinearId:
case SpvBuiltInWorkgroupLinearId:
case SpvBuiltInSubgroupSize:
case SpvBuiltInSubgroupMaxSize:
case SpvBuiltInNumSubgroups:
case SpvBuiltInNumEnqueuedSubgroups:
case SpvBuiltInSubgroupId:
case SpvBuiltInSubgroupLocalInvocationId:
unreachable("Unhandled builtin enum");
}
case SpvDecorationBuiltIn: {
nir_variable_mode mode;
vtn_get_builtin_location(dec->literals[0], &var->data.location,
&mode);
var->data.mode = mode;
if (mode == nir_var_shader_in || mode == nir_var_system_value)
var->data.read_only = true;
b->builtins[dec->literals[0]] = var;
break;
}
case SpvDecorationNoStaticUse:
/* This can safely be ignored */
break;