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vtn: set default fp_math_ctrl values for kernels

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The kernel capabilty has the `FPFastMathMode` decoration, but not the
`FPFastMathDefault` execution mode, so a SPIR-V module not using
`SPV_KHR_float_controls2` has no way of setting any defaults.

Fixes: 9da2d21804 ("vtn: implement default fp_math_ctrl without using execution mode")
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Tested-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39790>
This commit is contained in:
Karol Herbst 2026-02-09 21:08:05 +01:00 • committed by Marge Bot
parent 4df142acb6
commit faf3a93e8f
1 changed files with 6 additions and 0 deletions
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6
src/compiler/spirv/spirv_to_nir.c
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@ -5301,6 +5301,12 @@ vtn_handle_entry_point(struct vtn_builder *b, const uint32_t *w,
b->interface_ids = vtn_alloc_array(b, uint32_t, b->interface_ids_count);
memcpy(b->interface_ids, &w[start], b->interface_ids_count * 4);
qsort(b->interface_ids, b->interface_ids_count, 4, cmp_uint32_t);
if (stage == MESA_SHADER_KERNEL) {
*vtn_fp_math_ctrl_for_base_type(b, GLSL_TYPE_FLOAT16) |= nir_fp_preserve_sz_inf_nan;
*vtn_fp_math_ctrl_for_base_type(b, GLSL_TYPE_FLOAT) |= nir_fp_preserve_sz_inf_nan;
*vtn_fp_math_ctrl_for_base_type(b, GLSL_TYPE_DOUBLE) |= nir_fp_preserve_sz_inf_nan;
}
}
static bool