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/*
* Copyright 2014, 2015 Red Hat.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/* the virgl hw tgsi vs what the current gallium want will diverge over time.
so add a transform stage to remove things we don't want to send unless
the receiver supports it.
*/
#include "tgsi/tgsi_transform.h"
#include "tgsi/tgsi_info.h"
#include "virgl_context.h"
#include "virgl_screen.h"
struct virgl_transform_context {
struct tgsi_transform_context base;
bool cull_enabled;
bool has_precise;
bool fake_fp64;
};
static void
virgl_tgsi_transform_declaration(struct tgsi_transform_context *ctx,
struct tgsi_full_declaration *decl)
{
switch (decl->Declaration.File) {
case TGSI_FILE_CONSTANT:
if (decl->Declaration.Dimension) {
if (decl->Dim.Index2D == 0)
decl->Declaration.Dimension = 0;
}
break;
default:
break;
}
ctx->emit_declaration(ctx, decl);
}
/* for now just strip out the new properties the remote doesn't understand
yet */
static void
virgl_tgsi_transform_property(struct tgsi_transform_context *ctx,
struct tgsi_full_property *prop)
{
struct virgl_transform_context *vtctx = (struct virgl_transform_context *)ctx;
switch (prop->Property.PropertyName) {
case TGSI_PROPERTY_NUM_CLIPDIST_ENABLED:
case TGSI_PROPERTY_NUM_CULLDIST_ENABLED:
if (vtctx->cull_enabled)
ctx->emit_property(ctx, prop);
break;
case TGSI_PROPERTY_NEXT_SHADER:
break;
default:
ctx->emit_property(ctx, prop);
break;
}
}
static void
virgl_tgsi_transform_instruction(struct tgsi_transform_context *ctx,
struct tgsi_full_instruction *inst)
{
struct virgl_transform_context *vtctx = (struct virgl_transform_context *)ctx;
if (vtctx->fake_fp64 &&
(tgsi_opcode_infer_src_type(inst->Instruction.Opcode, 0) == TGSI_TYPE_DOUBLE ||
tgsi_opcode_infer_dst_type(inst->Instruction.Opcode, 0) == TGSI_TYPE_DOUBLE)) {
debug_printf("VIRGL: ARB_gpu_shader_fp64 is exposed but not supported.");
return;
}
if (!vtctx->has_precise && inst->Instruction.Precise)
inst->Instruction.Precise = 0;
for (unsigned i = 0; i < inst->Instruction.NumSrcRegs; i++) {
if (inst->Src[i].Register.File == TGSI_FILE_CONSTANT &&
inst->Src[i].Register.Dimension &&
inst->Src[i].Dimension.Index == 0)
inst->Src[i].Register.Dimension = 0;
}
ctx->emit_instruction(ctx, inst);
}
struct tgsi_token *virgl_tgsi_transform(struct virgl_context *vctx, const struct tgsi_token *tokens_in)
{
struct virgl_screen *vscreen = (struct virgl_screen *)vctx->base.screen;
struct virgl_transform_context transform;
const uint newLen = tgsi_num_tokens(tokens_in);
struct tgsi_token *new_tokens;
new_tokens = tgsi_alloc_tokens(newLen);
if (!new_tokens)
return NULL;
memset(&transform, 0, sizeof(transform));
transform.base.transform_declaration = virgl_tgsi_transform_declaration;
transform.base.transform_property = virgl_tgsi_transform_property;
transform.base.transform_instruction = virgl_tgsi_transform_instruction;
transform.cull_enabled = vscreen->caps.caps.v1.bset.has_cull;
transform.has_precise = vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_TGSI_PRECISE;
transform.fake_fp64 =
vscreen->caps.caps.v2.capability_bits & VIRGL_CAP_FAKE_FP64;
tgsi_transform_shader(tokens_in, new_tokens, newLen, &transform.base);
return new_tokens;
}
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