C Specification
The members of the VkPhysicalDeviceFloatControlsPropertiesKHR
structure describe the following implementation-dependent limits:
typedef struct VkPhysicalDeviceFloatControlsPropertiesKHR {
VkStructureType sType;
void* pNext;
VkShaderFloatControlsIndependenceKHR denormBehaviorIndependence;
VkShaderFloatControlsIndependenceKHR roundingModeIndependence;
VkBool32 shaderSignedZeroInfNanPreserveFloat16;
VkBool32 shaderSignedZeroInfNanPreserveFloat32;
VkBool32 shaderSignedZeroInfNanPreserveFloat64;
VkBool32 shaderDenormPreserveFloat16;
VkBool32 shaderDenormPreserveFloat32;
VkBool32 shaderDenormPreserveFloat64;
VkBool32 shaderDenormFlushToZeroFloat16;
VkBool32 shaderDenormFlushToZeroFloat32;
VkBool32 shaderDenormFlushToZeroFloat64;
VkBool32 shaderRoundingModeRTEFloat16;
VkBool32 shaderRoundingModeRTEFloat32;
VkBool32 shaderRoundingModeRTEFloat64;
VkBool32 shaderRoundingModeRTZFloat16;
VkBool32 shaderRoundingModeRTZFloat32;
VkBool32 shaderRoundingModeRTZFloat64;
} VkPhysicalDeviceFloatControlsPropertiesKHR;
Members
-
denormBehaviorIndependence
is a VkShaderFloatControlsIndependenceKHR value indicating whether, and how, denorm behavior can be set independently for different bit widths. -
roundingModeIndependence
is a VkShaderFloatControlsIndependenceKHR value indicating whether, and how, rounding modes can be set independently for different bit widths. -
shaderSignedZeroInfNanPreserveFloat16
is a boolean value indicating whether sign of a zero, Nans and \(\pm\infty\) can be preserved in 16-bit floating-point computations. It also indicates whether theSignedZeroInfNanPreserve
execution mode can be used for 16-bit floating-point types. -
shaderSignedZeroInfNanPreserveFloat32
is a boolean value indicating whether sign of a zero, Nans and \(\pm\infty\) can be preserved in 32-bit floating-point computations. It also indicates whether theSignedZeroInfNanPreserve
execution mode can be used for 32-bit floating-point types. -
shaderSignedZeroInfNanPreserveFloat64
is a boolean value indicating whether sign of a zero, Nans and \(\pm\infty\) can be preserved in 64-bit floating-point computations. It also indicates whether theSignedZeroInfNanPreserve
execution mode can be used for 64-bit floating-point types. -
shaderDenormPreserveFloat16
is a boolean value indicating whether denormals can be preserved in 16-bit floating-point computations. It also indicates whether theDenormPreserve
execution mode can be used for 16-bit floating-point types. -
shaderDenormPreserveFloat32
is a boolean value indicating whether denormals can be preserved in 32-bit floating-point computations. It also indicates whether theDenormPreserve
execution mode can be used for 32-bit floating-point types. -
shaderDenormPreserveFloat64
is a boolean value indicating whether denormals can be preserved in 64-bit floating-point computations. It also indicates whether theDenormPreserve
execution mode can be used for 64-bit floating-point types. -
shaderDenormFlushToZeroFloat16
is a boolean value indicating whether denormals can be flushed to zero in 16-bit floating-point computations. It also indicates whether theDenormFlushToZero
execution mode can be used for 16-bit floating-point types. -
shaderDenormFlushToZeroFloat32
is a boolean value indicating whether denormals can be flushed to zero in 32-bit floating-point computations. It also indicates whether theDenormFlushToZero
execution mode can be used for 32-bit floating-point types. -
shaderDenormFlushToZeroFloat64
is a boolean value indicating whether denormals can be flushed to zero in 64-bit floating-point computations. It also indicates whether theDenormFlushToZero
execution mode can be used for 64-bit floating-point types. -
shaderRoundingModeRTEFloat16
is a boolean value indicating whether an implementation supports the round-to-nearest-even rounding mode for 16-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTE
execution mode can be used for 16-bit floating-point types. -
shaderRoundingModeRTEFloat32
is a boolean value indicating whether an implementation supports the round-to-nearest-even rounding mode for 32-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTE
execution mode can be used for 32-bit floating-point types. -
shaderRoundingModeRTEFloat64
is a boolean value indicating whether an implementation supports the round-to-nearest-even rounding mode for 64-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTE
execution mode can be used for 64-bit floating-point types. -
shaderRoundingModeRTZFloat16
is a boolean value indicating whether an implementation supports the round-towards-zero rounding mode for 16-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTZ
execution mode can be used for 16-bit floating-point types. -
shaderRoundingModeRTZFloat32
is a boolean value indicating whether an implementation supports the round-towards-zero rounding mode for 32-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTZ
execution mode can be used for 32-bit floating-point types. -
shaderRoundingModeRTZFloat64
is a boolean value indicating whether an implementation supports the round-towards-zero rounding mode for 64-bit floating-point arithmetic and conversion instructions. It also indicates whether theRoundingModeRTZ
execution mode can be used for 64-bit floating-point types.
Description
editing-note
Implementations may not be able to control behavior of denorms for floating-point atomics. This needs to be taken into account when such atomics will be added to Vulkan. |
If the VkPhysicalDeviceFloatControlsPropertiesKHR
structure is
included in the pNext
chain of VkPhysicalDeviceProperties2, it
is filled with the implementation-dependent limits.
See Also
Document Notes
For more information, see the Vulkan Specification
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.
Copyright
Copyright (c) 2014-2019 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.