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texture unit critical path optimization

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This commit is contained in:
Blaise Tine
2021-08-05 02:47:26 -07:00
parent deed327890
commit 43ad188ccb
8 changed files with 100 additions and 63 deletions
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34
hw/rtl/tex_unit/VX_tex_sampler.v
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@@ -51,20 +51,25 @@ module VX_tex_sampler #(
);
end
wire [7:0] beta = req_blends[i][0];
wire [8:0] alpha = `BLEND_ONE - beta;
VX_tex_lerp #(
) tex_lerp_ul (
.blend (req_blends[i][0]),
.in1 (fmt_texels[0]),
.in2 (fmt_texels[1]),
.out (texel_ul[i])
.in1 (fmt_texels[0]),
.in2 (fmt_texels[1]),
.alpha (alpha),
.beta (beta),
.out (texel_ul[i])
);
VX_tex_lerp #(
) tex_lerp_uh (
.blend (req_blends[i][0]),
.in1 (fmt_texels[2]),
.in2 (fmt_texels[3]),
.out (texel_uh[i])
.in1 (fmt_texels[2]),
.in2 (fmt_texels[3]),
.alpha (alpha),
.beta (beta),
.out (texel_uh[i])
);
assign blend_v[i] = req_blends[i][1];
@@ -82,12 +87,16 @@ module VX_tex_sampler #(
);
for (genvar i = 0; i < NUM_REQS; i++) begin
wire [7:0] beta = blend_v_s0[i];
wire [8:0] alpha = `BLEND_ONE - beta;
VX_tex_lerp #(
) tex_lerp_v (
.blend (blend_v_s0[i]),
.in1 (texel_ul_s0[i]),
.in2 (texel_uh_s0[i]),
.out (texel_v[i])
.in1 (texel_ul_s0[i]),
.in2 (texel_uh_s0[i]),
.alpha (alpha),
.beta (beta),
.out (texel_v[i])
);
end
@@ -108,7 +117,6 @@ module VX_tex_sampler #(
assign req_ready = ~stall_out;
`ifdef DBG_PRINT_TEX
wire [`NW_BITS-1:0] req_wid, rsp_wid;
wire [31:0] req_PC, rsp_PC;