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nir: Add a couple is_zero() helpers

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Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Reviewed-by: Lorenzo Rossi <lorenzo.rossi@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40769>
This commit is contained in:
Faith Ekstrand 2026-04-02 13:59:20 -04:00
parent fd5c6d1223
commit fb347b8458
1 changed files with 20 additions and 0 deletions
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20
src/compiler/nir/nir.h
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@ -3102,6 +3102,20 @@ NIR_DEFINE_SRC_AS_CONST(double, float)
#undef NIR_DEFINE_SRC_AS_CONST
static inline bool
nir_src_is_zero(nir_src src)
{
if (!nir_src_is_const(src))
return false;
for (unsigned i = 0; i < nir_src_num_components(src); i++) {
if (nir_src_comp_as_uint(src, i) != 0)
return false;
}
return true;
}
static inline nir_const_value
nir_scalar_as_const_value(nir_scalar s)
{
@ -3125,6 +3139,12 @@ NIR_DEFINE_SCALAR_AS_CONST(double, float)
#undef NIR_DEFINE_SCALAR_AS_CONST
static inline bool
nir_scalar_is_zero(nir_scalar s)
{
return nir_scalar_is_const(s) && nir_scalar_as_uint(s) == 0;
}
static inline nir_op
nir_scalar_alu_op(nir_scalar s)
{