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nir/lower_int64: Enable lowering of 64-bit float to 64-bit integer conversions.

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The existing code for this appears to work okay for conversions
involving 64-bit floats, relax the assert and enable the lowering
path.  This fixes 64-bit float to 64-bit integer integer conversions
on devices that have native support for 64-bit floats but lack 64-bit
integer support, like Intel MTL hardware.

Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19128>
This commit is contained in:
Francisco Jerez 2022-10-17 14:00:59 -07:00 • committed by Marge Bot
parent eac8cbb049
commit 29da985682
1 changed files with 1 additions and 5 deletions
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6
src/compiler/nir/nir_lower_int64.c
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@ -754,7 +754,7 @@ lower_2f(nir_builder *b, nir_ssa_def *x, unsigned dest_bit_size,
static nir_ssa_def *
lower_f2(nir_builder *b, nir_ssa_def *x, bool dst_is_signed)
{
assert(x->bit_size == 16 || x->bit_size == 32);
assert(x->bit_size == 16 || x->bit_size == 32 || x->bit_size == 64);
nir_ssa_def *x_sign = NULL;
if (dst_is_signed)
@ -977,10 +977,6 @@ lower_int64_alu_instr(nir_builder *b, nir_alu_instr *alu)
return lower_2f(b, src[0], nir_dest_bit_size(alu->dest.dest), false);
case nir_op_f2i64:
case nir_op_f2u64:
/* We don't support f64toi64 (yet?). */
if (src[0]->bit_size > 32)
return false;
return lower_f2(b, src[0], alu->op == nir_op_f2i64);
default:
unreachable("Invalid ALU opcode to lower");