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nir: document signed zero, inf, nan preserve flags

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Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39103>
This commit is contained in:
Georg Lehmann 2025-12-29 17:27:41 +01:00 • committed by Marge Bot
parent 9d027fc870
commit b70294b91f
1 changed files with 19 additions and 1 deletions
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20
src/compiler/nir/nir.h
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@ -1500,11 +1500,29 @@ nir_op_is_selection(nir_op op)
* to this enum in the future.
*/
typedef enum {
/**
* If not set, any -0.0 or +0.0 output can have either sign,
* and any zero input can be treated as having opposite sign.
*/
nir_fp_preserve_signed_zero = BITFIELD_BIT(0),
/**
* If not set, the output value is undefined if
* it or any input is -Inf or +Inf.
*/
nir_fp_preserve_inf = BITFIELD_BIT(1),
/**
* If not set, the output value is undefined if
* it or any input is a NaN.
*/
nir_fp_preserve_nan = BITFIELD_BIT(2),
nir_fp_preserve_sz_inf_nan = BITFIELD_MASK(3),
nir_fp_preserve_sz_inf_nan = nir_fp_preserve_signed_zero |
nir_fp_preserve_inf |
nir_fp_preserve_nan,
nir_fp_fast_math = 0,
nir_fp_no_fast_math = BITFIELD_MASK(3),
} nir_fp_math_control;