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v3d: Add support for hardware pack/unpack of half floats.

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Cuts the formerly 7-minute simulation time of fs-packHalf2x16.shader_test
in half.
This commit is contained in:
Eric Anholt 2018-09-18 14:09:25 -07:00
parent 7d77fe1bcc
commit 8ec83dc51e
2 changed files with 17 additions and 0 deletions
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16
src/broadcom/compiler/nir_to_vir.c
View file

@ -845,6 +845,20 @@ ntq_emit_alu(struct v3d_compile *c, nir_alu_instr *instr)
vir_uniform_ui(c, 0)));
break;
case nir_op_pack_half_2x16_split:
result = vir_VFPACK(c, src[0], src[1]);
break;
case nir_op_unpack_half_2x16_split_x:
result = vir_FMOV(c, src[0]);
vir_set_unpack(c->defs[result.index], 0, V3D_QPU_UNPACK_L);
break;
case nir_op_unpack_half_2x16_split_y:
result = vir_FMOV(c, src[0]);
vir_set_unpack(c->defs[result.index], 0, V3D_QPU_UNPACK_H);
break;
default:
fprintf(stderr, "unknown NIR ALU inst: ");
nir_print_instr(&instr->instr, stderr);
@ -1917,6 +1931,8 @@ const nir_shader_compiler_options v3d_nir_options = {
.lower_pack_snorm_4x8 = true,
.lower_unpack_unorm_4x8 = true,
.lower_unpack_snorm_4x8 = true,
.lower_pack_half_2x16 = true,
.lower_unpack_half_2x16 = true,
.lower_fdiv = true,
.lower_find_lsb = true,
.lower_ffma = true,

1
src/gallium/drivers/v3d/v3d_screen.c
View file

@ -109,6 +109,7 @@ v3d_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
case PIPE_CAP_SIGNED_VERTEX_BUFFER_OFFSET:
case PIPE_CAP_TGSI_CAN_READ_OUTPUTS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
return 1;
case PIPE_CAP_INDEP_BLEND_ENABLE: