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radv: add a new function for exporting VS outputs

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Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2019-07-10 15:18:56 +02:00
parent ac0edc369c
commit c4ab33378a
1 changed files with 128 additions and 0 deletions
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128
src/amd/vulkan/radv_nir_to_llvm.c
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@ -2750,6 +2750,134 @@ radv_build_param_exports(struct radv_shader_context *ctx,
outinfo->param_exports = param_count;
}
/* Generate export instructions for hardware VS shader stage or NGG GS stage
* (position and parameter data only).
*/
static void
radv_llvm_export_vs(struct radv_shader_context *ctx,
struct radv_shader_output_values *outputs,
unsigned noutput,
struct radv_vs_output_info *outinfo,
bool export_clip_dists)
{
LLVMValueRef psize_value = NULL, layer_value = NULL, viewport_value = NULL;
struct ac_export_args pos_args[4] = {};
unsigned pos_idx, index;
int i;
/* Build position exports */
for (i = 0; i < noutput; i++) {
switch (outputs[i].slot_name) {
case VARYING_SLOT_POS:
si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
V_008DFC_SQ_EXP_POS, &pos_args[0]);
break;
case VARYING_SLOT_PSIZ:
psize_value = outputs[i].values[0];
break;
case VARYING_SLOT_LAYER:
layer_value = outputs[i].values[0];
break;
case VARYING_SLOT_VIEWPORT:
viewport_value = outputs[i].values[0];
break;
case VARYING_SLOT_CLIP_DIST0:
case VARYING_SLOT_CLIP_DIST1:
index = 2 + outputs[i].slot_index;
si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
V_008DFC_SQ_EXP_POS + index,
&pos_args[index]);
break;
default:
break;
}
}
/* We need to add the position output manually if it's missing. */
if (!pos_args[0].out[0]) {
pos_args[0].enabled_channels = 0xf; /* writemask */
pos_args[0].valid_mask = 0; /* EXEC mask */
pos_args[0].done = 0; /* last export? */
pos_args[0].target = V_008DFC_SQ_EXP_POS;
pos_args[0].compr = 0; /* COMPR flag */
pos_args[0].out[0] = ctx->ac.f32_0; /* X */
pos_args[0].out[1] = ctx->ac.f32_0; /* Y */
pos_args[0].out[2] = ctx->ac.f32_0; /* Z */
pos_args[0].out[3] = ctx->ac.f32_1; /* W */
}
if (outinfo->writes_pointsize ||
outinfo->writes_layer ||
outinfo->writes_viewport_index) {
pos_args[1].enabled_channels = ((outinfo->writes_pointsize == true ? 1 : 0) |
(outinfo->writes_layer == true ? 4 : 0));
pos_args[1].valid_mask = 0;
pos_args[1].done = 0;
pos_args[1].target = V_008DFC_SQ_EXP_POS + 1;
pos_args[1].compr = 0;
pos_args[1].out[0] = ctx->ac.f32_0; /* X */
pos_args[1].out[1] = ctx->ac.f32_0; /* Y */
pos_args[1].out[2] = ctx->ac.f32_0; /* Z */
pos_args[1].out[3] = ctx->ac.f32_0; /* W */
if (outinfo->writes_pointsize == true)
pos_args[1].out[0] = psize_value;
if (outinfo->writes_layer == true)
pos_args[1].out[2] = layer_value;
if (outinfo->writes_viewport_index == true) {
if (ctx->options->chip_class >= GFX9) {
/* GFX9 has the layer in out.z[10:0] and the viewport
* index in out.z[19:16].
*/
LLVMValueRef v = viewport_value;
v = ac_to_integer(&ctx->ac, v);
v = LLVMBuildShl(ctx->ac.builder, v,
LLVMConstInt(ctx->ac.i32, 16, false),
"");
v = LLVMBuildOr(ctx->ac.builder, v,
ac_to_integer(&ctx->ac, pos_args[1].out[2]), "");
pos_args[1].out[2] = ac_to_float(&ctx->ac, v);
pos_args[1].enabled_channels |= 1 << 2;
} else {
pos_args[1].out[3] = viewport_value;
pos_args[1].enabled_channels |= 1 << 3;
}
}
}
for (i = 0; i < 4; i++) {
if (pos_args[i].out[0])
outinfo->pos_exports++;
}
/* Navi10-14 skip POS0 exports if EXEC=0 and DONE=0, causing a hang.
* Setting valid_mask=1 prevents it and has no other effect.
*/
if (ctx->ac.family == CHIP_NAVI10 ||
ctx->ac.family == CHIP_NAVI12 ||
ctx->ac.family == CHIP_NAVI14)
pos_args[0].valid_mask = 1;
pos_idx = 0;
for (i = 0; i < 4; i++) {
if (!pos_args[i].out[0])
continue;
/* Specify the target we are exporting */
pos_args[i].target = V_008DFC_SQ_EXP_POS + pos_idx++;
if (pos_idx == outinfo->pos_exports)
/* Specify that this is the last export */
pos_args[i].done = 1;
ac_build_export(&ctx->ac, &pos_args[i]);
}
/* Build parameter exports */
radv_build_param_exports(ctx, outputs, noutput, outinfo, export_clip_dists);
}
static void
handle_vs_outputs_post(struct radv_shader_context *ctx,
bool export_prim_id,