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Merge pull request #1179 from js6i/no_fast_math

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Config: Added setting for fastMathEnabled Metal Compiler option.
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Bill Hollings 2020-12-14 13:11:33 -05:00 committed by GitHub
commit b8f044eaaf
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4 changed files with 20 additions and 0 deletions
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13
MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
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@ -558,6 +558,19 @@ typedef struct {
*/
uint32_t defaultGPUCaptureScopeQueueIndex;
/**
* Corresponds to the fastMathEnabled property of MTLCompileOptions.
* Setting it may cause the Metal Compiler to optimize floating point operations
* in ways that may violate the IEEE 754 standard.
*
* Must be changed before creating a VkDevice, for the change to take effect.
*
* The initial value or this parameter is set by the
* MVK_CONFIG_FAST_MATH_ENABLED
* runtime environment variable or MoltenVK compile-time build setting.
* If neither is set, the value of this parameter defaults to false.
*/
VkBool32 fastMathEnabled;
} MVKConfiguration;
/**

1
MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
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@ -4086,6 +4086,7 @@ void MVKDevice::reservePrivateData(const VkDeviceCreateInfo* pCreateInfo) {
void MVKDevice::initMTLCompileOptions() {
_mtlCompileOptions = [MTLCompileOptions new]; // retained
_mtlCompileOptions.languageVersion = _pMetalFeatures->mslVersionEnum;
_mtlCompileOptions.fastMathEnabled = _pMVKConfig->fastMathEnabled;
}
MVKDevice::~MVKDevice() {

1
MoltenVK/MoltenVK/GPUObjects/MVKInstance.mm
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@ -710,6 +710,7 @@ void MVKInstance::initConfig() {
MVK_SET_FROM_ENV_OR_BUILD_BOOL( _mvkConfig.fullImageViewSwizzle, MVK_CONFIG_FULL_IMAGE_VIEW_SWIZZLE);
MVK_SET_FROM_ENV_OR_BUILD_BOOL( _mvkConfig.defaultGPUCaptureScopeQueueFamilyIndex, MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_FAMILY_INDEX);
MVK_SET_FROM_ENV_OR_BUILD_BOOL( _mvkConfig.defaultGPUCaptureScopeQueueIndex, MVK_CONFIG_DEFAULT_GPU_CAPTURE_SCOPE_QUEUE_INDEX);
MVK_SET_FROM_ENV_OR_BUILD_BOOL( _mvkConfig.fastMathEnabled, MVK_CONFIG_FAST_MATH_ENABLED);
MVK_SET_FROM_ENV_OR_BUILD_INT32(_autoGPUCaptureScope, MVK_CONFIG_AUTO_GPU_CAPTURE_SCOPE);
MVK_SET_FROM_ENV_OR_BUILD_STRING(_autoGPUCaptureOutputFile, MVK_CONFIG_AUTO_GPU_CAPTURE_OUTPUT_FILE);

5
MoltenVK/MoltenVK/Utility/MVKEnvironment.h
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@ -138,6 +138,11 @@
# define MVK_CONFIG_FULL_IMAGE_VIEW_SWIZZLE 0
#endif
/** Set the fastMathEnabled Metal Compiler option. Disabled by default. */
#ifndef MVK_CONFIG_FAST_MATH_ENABLED
# define MVK_CONFIG_FAST_MATH_ENABLED 0
#endif
/**
* The index of the queue family whose presentation submissions will
* be used as the default GPU Capture Scope during debugging in Xcode.