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pan/bi: do not vectorize nir_op_f2{i,u}8

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Vectorizing nir_op_f2i8 and nir_op_f2u8 can lead other passes to
generate large vector (32x2) that are not supported:
----------------------------------
        16x2  %23 = fmul! %22, %21
        8x2   %24 = f2i8! %23
---- TRANSFORM TO ----------------
        16x2  %30 = fmul! %29, %28
        32x2  %31 = f2f32! %30
        16x2  %32 = f2i16! %31
        8x2   %33 = i2i8! %32
----------------------------------

examples:
- dEQP-VK.spirv_assembly.type.vec2.i8#mod_frag
- dEQP-VK.spirv_assembly.type.vec2.i8#rem_frag
- dEQP-VK.spirv_assembly.instruction.compute.convertftou#float16_to_uint8_max

Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36638>
This commit is contained in:
Romaric Jodin 2025-11-14 15:16:50 +01:00 • committed by Marge Bot
parent 40e3d8e0e6
commit b4c2954503
1 changed files with 2 additions and 0 deletions
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2
src/panfrost/compiler/bifrost_compile.c
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@ -5510,6 +5510,8 @@ bi_vectorize_filter(const nir_instr *instr, const void *data)
case nir_op_b2f16:
case nir_op_f2i16:
case nir_op_f2u16:
case nir_op_f2i8:
case nir_op_f2u8:
case nir_op_extract_u8:
case nir_op_extract_i8:
case nir_op_extract_u16: