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pan/bi: Fix up dual texturing registers

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This must be done after RA. How delightful. Use the GenXML strategy to
just OR the birds.

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13723>
This commit is contained in:
Alyssa Rosenzweig 2021-11-08 14:43:08 -05:00 committed by Marge Bot
parent ce8d2b96c1
commit e6c6a1afb4
1 changed files with 22 additions and 0 deletions
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22
src/panfrost/bifrost/bi_ra.c
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@ -364,6 +364,25 @@ bi_reg_from_index(bi_context *ctx, struct lcra_state *l, bi_index index)
return new_index;
}
/* Dual texture instructions write to two sets of staging registers, modeled as
* two destinations in the IR. The first set is communicated with the usual
* staging register mechanism. The second set is encoded in the texture
* operation descriptor. This is quite unusual, and requires the following late
* fixup.
*/
static void
bi_fixup_dual_tex_register(bi_instr *I)
{
assert(I->dest[1].type == BI_INDEX_REGISTER);
assert(I->src[3].type == BI_INDEX_CONSTANT);
struct bifrost_dual_texture_operation desc = {
.secondary_register = I->dest[1].value
};
I->src[3].value |= bi_dual_tex_as_u32(desc);
}
static void
bi_install_registers(bi_context *ctx, struct lcra_state *l)
{
@ -373,6 +392,9 @@ bi_install_registers(bi_context *ctx, struct lcra_state *l)
bi_foreach_src(ins, s)
ins->src[s] = bi_reg_from_index(ctx, l, ins->src[s]);
if (ins->op == BI_OPCODE_TEXC && !bi_is_null(ins->dest[1]))
bi_fixup_dual_tex_register(ins);
}
}