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pan/bi: Comment the fexp2 implementation 

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11733>
This commit is contained in:
Alyssa Rosenzweig 2021-06-28 10:22:35 -04:00 committed by Marge Bot
parent 297ac6e453
commit 0991e9592d
1 changed files with 6 additions and 2 deletions
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8
src/panfrost/bifrost/bifrost_compile.c
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@ -1821,12 +1821,16 @@ bi_emit_alu(bi_builder *b, nir_alu_instr *instr)
break;
}
/* multiply by 1.0 * 2*24 */
/* Multiply by 1.0 * 2*24 and convert to integer to get a 8:24
* fixed-point input */
bi_index scale = bi_fma_rscale_f32(b, s0, bi_imm_f32(1.0f),
bi_negzero(), bi_imm_u32(24), BI_ROUND_NONE,
BI_SPECIAL_NONE);
bi_index fixed_pt = bi_f32_to_s32(b, scale, BI_ROUND_NONE);
bi_fexp_f32_to(b, dst, bi_f32_to_s32(b, scale, BI_ROUND_NONE), s0);
/* Compute the result for the fixed-point input, but pass along
* the original input for correct NaN propagation */
bi_fexp_f32_to(b, dst, fixed_pt, s0);
break;
}