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v3d,v3dv: use fquantize2f16 lowering in NIR

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Ths is equivalent to what we have been doing in the backend.

Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24924>
This commit is contained in:
Iago Toral Quiroga
2023-08-29 13:18:04 +02:00
committed by Marge Bot
parent 209ed8eace
commit ade44ad82e
3 changed files with 2 additions and 21 deletions
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src/broadcom/compiler/nir_to_vir.c
-21
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@@ -1694,27 +1694,6 @@ ntq_emit_alu(struct v3d_compile *c, nir_alu_instr *instr)
vir_set_unpack(c->defs[result.index], 0, V3D_QPU_UNPACK_H);
break;
case nir_op_fquantize2f16: {
/* F32 -> F16 -> F32 conversion */
struct qreg tmp = vir_FMOV(c, src[0]);
vir_set_pack(c->defs[tmp.index], V3D_QPU_PACK_L);
tmp = vir_FMOV(c, tmp);
vir_set_unpack(c->defs[tmp.index], 0, V3D_QPU_UNPACK_L);
/* Check for denorm */
struct qreg abs_src = vir_FMOV(c, src[0]);
vir_set_unpack(c->defs[abs_src.index], 0, V3D_QPU_UNPACK_ABS);
struct qreg threshold = vir_uniform_f(c, ldexpf(1.0, -14));
vir_set_pf(c, vir_FCMP_dest(c, vir_nop_reg(), abs_src, threshold),
V3D_QPU_PF_PUSHC);
/* Return +/-0 for denorms */
struct qreg zero =
vir_AND(c, src[0], vir_uniform_ui(c, 0x80000000));
result = vir_FMOV(c, vir_SEL(c, V3D_QPU_COND_IFNA, tmp, zero));
break;
}
default:
fprintf(stderr, "unknown NIR ALU inst: ");
nir_print_instr(&instr->instr, stderr);