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r600/shader: only read back the necessary tess factor components.

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This just reduces the lds reads for the the tess factor emission.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2017-12-29 03:14:21 +00:00
parent adfb9c5c7b
commit e836fb2002
1 changed files with 4 additions and 4 deletions
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src/gallium/drivers/r600/r600_shader.c
+4 -4
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@@ -2851,7 +2851,7 @@ static int r600_store_tcs_output(struct r600_shader_ctx *ctx)
}
static int r600_tess_factor_read(struct r600_shader_ctx *ctx,
int output_idx)
int output_idx, int nc)
{
int param;
unsigned temp_reg = r600_get_temp(ctx);
@@ -2871,7 +2871,7 @@ static int r600_tess_factor_read(struct r600_shader_ctx *ctx,
if (r)
return r;
do_lds_fetch_values(ctx, temp_reg, dreg, 0xf);
do_lds_fetch_values(ctx, temp_reg, dreg, ((1u << nc) - 1));
return 0;
}
@@ -2941,13 +2941,13 @@ static int r600_emit_tess_factor(struct r600_shader_ctx *ctx)
return -1;
if (tessouter_idx != -1) {
r = r600_tess_factor_read(ctx, tessouter_idx);
r = r600_tess_factor_read(ctx, tessouter_idx, outer_comps);
if (r)
return r;
}
if (tessinner_idx != -1) {
r = r600_tess_factor_read(ctx, tessinner_idx);
r = r600_tess_factor_read(ctx, tessinner_idx, inner_comps);
if (r)
return r;
}