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Implement GL_EXT_shader_16bit_storage and GL_EXT_shader_8bit_storage extensions.

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These introduce limited support for 8/16-bit types such that they can only be accessed in buffer memory and converted to/from 32-bit types.

Contributed from Khronos-internal work.
This commit is contained in:
John Kessenich 2018-07-03 13:19:51 -06:00
parent eefab240f7
commit 312dcfb070
43 changed files with 6179 additions and 2765 deletions
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1
SPIRV/GLSL.ext.KHR.h Normal file → Executable file
View file

@ -36,6 +36,7 @@ static const char* const E_SPV_KHR_device_group = "SPV_KHR_devic
static const char* const E_SPV_KHR_multiview = "SPV_KHR_multiview";
static const char* const E_SPV_KHR_shader_draw_parameters = "SPV_KHR_shader_draw_parameters";
static const char* const E_SPV_KHR_16bit_storage = "SPV_KHR_16bit_storage";
static const char* const E_SPV_KHR_8bit_storage = "SPV_KHR_8bit_storage";
static const char* const E_SPV_KHR_storage_buffer_storage_class = "SPV_KHR_storage_buffer_storage_class";
static const char* const E_SPV_KHR_post_depth_coverage = "SPV_KHR_post_depth_coverage";

14
SPIRV/GlslangToSpv.cpp
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@ -2507,6 +2507,20 @@ spv::Id TGlslangToSpvTraverser::createSpvVariable(const glslang::TIntermSymbol*
}
}
const bool contains8BitType = node->getType().containsBasicType(glslang::EbtInt8) ||
node->getType().containsBasicType(glslang::EbtUint8);
if (contains8BitType) {
if (storageClass == spv::StorageClassPushConstant) {
builder.addExtension(spv::E_SPV_KHR_8bit_storage);
builder.addCapability(spv::CapabilityStoragePushConstant8);
} else if (storageClass == spv::StorageClassUniform) {
builder.addExtension(spv::E_SPV_KHR_8bit_storage);
builder.addCapability(spv::CapabilityUniformAndStorageBuffer8BitAccess);
if (node->getType().getQualifier().storage == glslang::EvqBuffer)
builder.addCapability(spv::CapabilityStorageBuffer8BitAccess);
}
}
const char* name = node->getName().c_str();
if (glslang::IsAnonymous(name))
name = "";

4
SPIRV/doc.cpp
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@ -790,6 +790,10 @@ const char* CapabilityString(int info)
case CapabilityStoragePushConstant16: return "StoragePushConstant16";
case CapabilityStorageInputOutput16: return "StorageInputOutput16";
case CapabilityStorageBuffer8BitAccess: return "CapabilityStorageBuffer8BitAccess";
case CapabilityUniformAndStorageBuffer8BitAccess: return "CapabilityUniformAndStorageBuffer8BitAccess";
case CapabilityStoragePushConstant8: return "CapabilityStoragePushConstant8";
case CapabilityDeviceGroup: return "DeviceGroup";
case CapabilityMultiView: return "MultiView";

3
SPIRV/spirv.hpp Normal file → Executable file
View file

@ -679,6 +679,9 @@ enum Capability {
CapabilityVariablePointers = 4442,
CapabilityAtomicStorageOps = 4445,
CapabilitySampleMaskPostDepthCoverage = 4447,
CapabilityStorageBuffer8BitAccess = 4448,
CapabilityUniformAndStorageBuffer8BitAccess = 4449,
CapabilityStoragePushConstant8 = 4450,
CapabilityFloat16ImageAMD = 5008,
CapabilityImageGatherBiasLodAMD = 5009,
CapabilityFragmentMaskAMD = 5010,