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nir: use bitfield_insert instead of bfi in nir_lower_double_ops 

NVIDIA hardware doesn't have an equivilant to bfi, but we do already have
a lowering for bitfield_insert->bfi.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5373>
This commit is contained in:
Ben Skeggs 2020-06-06 16:58:00 +10:00
parent 7b4f0eadc1
commit a6c747e8e0
1 changed files with 3 additions and 1 deletions
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4
src/compiler/nir/nir_lower_double_ops.c
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@ -49,7 +49,9 @@ set_exponent(nir_builder *b, nir_ssa_def *src, nir_ssa_def *exp)
/* The exponent is bits 52-62, or 20-30 of the high word, so set the exponent
* to 1023
*/
nir_ssa_def *new_hi = nir_bfi(b, nir_imm_int(b, 0x7ff00000), exp, hi);
nir_ssa_def *new_hi = nir_bitfield_insert(b, hi, exp,
nir_imm_int(b, 20),
nir_imm_int(b, 11));
/* recombine */
return nir_pack_64_2x32_split(b, lo, new_hi);
}