Mesa (master): virgl: Return an error if we use fp64 on top of GLES

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Module: Mesa
Branch: master
Commit: d7b31969767c0911b490022dc6bb67827e664644
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=d7b31969767c0911b490022dc6bb67827e664644

Author: Elie Tournier <tournier.elie at gmail.com>
Date:   Fri Feb 15 16:21:42 2019 +0000

virgl: Return an error if we use fp64 on top of GLES

Signed-off-by: Elie Tournier <elie.tournier at collabora.com>
Reviewed-by: <Gurchetan Singh gurchetansingh at chromium.org>

---

 src/gallium/drivers/virgl/virgl_tgsi.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/gallium/drivers/virgl/virgl_tgsi.c b/src/gallium/drivers/virgl/virgl_tgsi.c
index d1f785d4d21..7a06a572794 100644
--- a/src/gallium/drivers/virgl/virgl_tgsi.c
+++ b/src/gallium/drivers/virgl/virgl_tgsi.c
@@ -25,13 +25,17 @@
    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
@@ -78,6 +82,13 @@ 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)) {
+      fprintf(stderr, "ARB_gpu_shader_fp64 is exposed but not supported.");
+      return;
+   }
+
    if (!vtctx->has_precise && inst->Instruction.Precise)
       inst->Instruction.Precise = 0;
 
@@ -107,6 +118,8 @@ struct tgsi_token *virgl_tgsi_transform(struct virgl_context *vctx, const struct
    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;