[Mesa-dev] [PATCH 1/2] tgsi/scan: add uses_doubles to tgsi scanner

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This allows drivers to work out if a shader contains any
double opcodes easily.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/gallium/auxiliary/tgsi/tgsi_scan.c | 4 ++++
 src/gallium/auxiliary/tgsi/tgsi_scan.h | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index e6011d2..e19b8a1 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -97,6 +97,10 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
             assert(fullinst->Instruction.Opcode < TGSI_OPCODE_LAST);
             info->opcode_count[fullinst->Instruction.Opcode]++;
 
+            if (fullinst->Instruction.Opcode >= TGSI_OPCODE_F2D ||
+                fullinst->Instruction.Opcode < TGSI_OPCODE_DRSQ)
+               info->uses_doubles = true;
+
             for (i = 0; i < fullinst->Instruction.NumSrcRegs; i++) {
                const struct tgsi_full_src_register *src =
                   &fullinst->Src[i];
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 5dc9267..daa73cc 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -86,7 +86,7 @@ struct tgsi_shader_info
    boolean writes_viewport_index;
    boolean writes_layer;
    boolean is_msaa_sampler[PIPE_MAX_SAMPLERS];
-
+   boolean uses_doubles; /**< uses any of the double instructions */
    unsigned clipdist_writemask;
    unsigned culldist_writemask;
    unsigned num_written_culldistance;
-- 
1.9.3