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pan/bi: Implement ACMPXCHG 

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8848>
This commit is contained in:
Alyssa Rosenzweig 2021-02-03 14:09:46 -05:00 committed by Marge Bot
parent d400d5e150
commit eff837c7c2
1 changed files with 50 additions and 0 deletions
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50
src/panfrost/bifrost/bifrost_compile.c
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@ -573,6 +573,48 @@ bi_emit_axchg(bi_builder *b, nir_intrinsic_instr *instr, enum bi_seg seg)
bi_make_vec_to(b, bi_dest_index(&instr->dest), inout_words, NULL, sz / 32, 32);
}
/* Exchanges the second staging register with memory if comparison with first
* staging register passes */
static void
bi_emit_acmpxchg(bi_builder *b, nir_intrinsic_instr *instr, enum bi_seg seg)
{
assert(seg == BI_SEG_NONE || seg == BI_SEG_WLS);
bi_index addr = bi_src_index(&instr->src[0]);
/* hardware is swapped from NIR */
bi_index src0 = bi_src_index(&instr->src[2]);
bi_index src1 = bi_src_index(&instr->src[1]);
unsigned sz = nir_src_bit_size(instr->src[1]);
assert(sz == 32 || sz == 64);
bi_index data_words[] = {
bi_word(src0, 0),
sz == 32 ? bi_word(src1, 0) : bi_word(src0, 1),
/* 64-bit */
bi_word(src1, 0),
bi_word(src1, 1),
};
bi_index inout = bi_temp_reg(b->shader);
bi_make_vec_to(b, inout, data_words, NULL, 2 * (sz / 32), 32);
bi_acmpxchg_to(b, sz, inout, inout,
bi_word(addr, 0),
(seg == BI_SEG_NONE) ? bi_word(addr, 1) : bi_zero(),
seg);
bi_index inout_words[] = {
bi_word(inout, 0),
bi_word(inout, 1),
};
bi_make_vec_to(b, bi_dest_index(&instr->dest), inout_words, NULL, sz / 32, 32);
}
static void
bi_load_sysval(bi_builder *b, nir_instr *instr,
unsigned nr_components, unsigned offset)
@ -696,6 +738,14 @@ bi_emit_intrinsic(bi_builder *b, nir_intrinsic_instr *instr)
bi_emit_axchg(b, instr, BI_SEG_WLS);
break;
case nir_intrinsic_global_atomic_comp_swap:
bi_emit_acmpxchg(b, instr, BI_SEG_NONE);
break;
case nir_intrinsic_shared_atomic_comp_swap:
bi_emit_acmpxchg(b, instr, BI_SEG_WLS);
break;
case nir_intrinsic_load_frag_coord:
bi_emit_load_frag_coord(b, instr);
break;