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pan/bi: Implement txb

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Also uses the 8.8 signed fixed-point format.

dEQP-GLES2.functional.shaders.texture_functions.fragment.texture2d_bias

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7081>
This commit is contained in:
Alyssa Rosenzweig 2020-10-07 18:32:32 -04:00
parent 5fa5c01aca
commit 7fdb090709
1 changed files with 13 additions and 0 deletions
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13
src/panfrost/bifrost/bifrost_compile.c
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@ -1129,6 +1129,7 @@ emit_texc(bi_context *ctx, nir_tex_instr *instr)
switch (instr->op) {
case nir_texop_tex:
case nir_texop_txl:
case nir_texop_txb:
break;
default:
unreachable("Unsupported texture op");
@ -1177,11 +1178,13 @@ emit_texc(bi_context *ctx, nir_tex_instr *instr)
tex.swizzle[1][0] = 0;
tex.swizzle[2][0] = 1;
break;
case nir_tex_src_lod:
if (nir_src_is_const(instr->src[i].src) && nir_src_as_uint(instr->src[i].src) == 0) {
desc.lod_mode = BIFROST_LOD_MODE_ZERO;
} else {
assert(base == nir_type_float);
assert(sz == 16 || sz == 32);
dregs[BIFROST_TEX_DREG_LOD] =
bi_emit_lod_88(ctx, index, sz == 16);
@ -1189,6 +1192,16 @@ emit_texc(bi_context *ctx, nir_tex_instr *instr)
}
break;
case nir_tex_src_bias:
/* Upper 16-bits interpreted as a clamp, leave zero */
assert(base == nir_type_float);
assert(sz == 16 || sz == 32);
dregs[BIFROST_TEX_DREG_LOD] =
bi_emit_lod_88(ctx, index, sz == 16);
desc.lod_mode = BIFROST_LOD_MODE_BIAS;
break;
default:
unreachable("Unhandled src type in texc emit");
}