pan/bi: Implement load_ubo with the builder
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8135>
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@ -774,6 +774,42 @@ bi_emit_st_vary(bi_context *ctx, nir_intrinsic_instr *instr)
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bi_emit(ctx, st);
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}
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static void
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bi_emit_load_ubo(bi_builder *b, nir_intrinsic_instr *instr)
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{
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/* nir_lower_uniforms_to_ubo() should have been called, reserving
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* UBO #0 for uniforms even if the shaders doesn't have uniforms.
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*/
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assert(b->shader->nir->info.first_ubo_is_default_ubo);
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bool offset_is_const = nir_src_is_const(instr->src[1]);
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bi_index dyn_offset = bi_src_index(&instr->src[1]);
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uint32_t const_offset = 0;
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/* We may need to offset UBO loads by however many sysvals we have */
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unsigned sysval_offset = 16 * b->shader->sysvals.sysval_count;
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if (nir_src_is_const(instr->src[1]))
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const_offset = nir_src_as_uint(instr->src[1]);
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if (nir_src_is_const(instr->src[0]) &&
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nir_src_as_uint(instr->src[0]) == 0 &&
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b->shader->sysvals.sysval_count) {
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if (offset_is_const) {
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const_offset += sysval_offset;
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} else {
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dyn_offset = bi_iadd_u32(b, dyn_offset,
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bi_imm_u32(sysval_offset), false);
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}
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}
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bi_load_to(b, instr->num_components * 32,
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bi_dest_index(&instr->dest), offset_is_const ?
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bi_imm_u32(const_offset) : dyn_offset,
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bi_src_index(&instr->src[0]),
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BI_SEG_UBO);
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}
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static void
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bi_emit_ld_ubo(bi_context *ctx, nir_intrinsic_instr *instr)
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{
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