tgsi: add DDIV instruction

Double-precision division, to allow more precision than a DRCP + DMUL
sequence.

Reviewed-by: Roland Scheidegger <[email protected]>
Reviewed-by: Ilia Mirkin <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index d2d30b41d00..3e2d0e9fac2 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -2005,6 +2005,15 @@ Perform a * b + c with no intermediate rounding step.
   dst.zw = src0.zw \times src1.zw + src2.zw
 
 
+.. opcode:: DDIV - Divide
+
+.. math::
+
+  dst.xy = \frac{src0.xy}{src1.xy}
+
+  dst.zw = \frac{src0.zw}{src1.zw}
+
+
 .. opcode:: DRCP - Reciprocal
 
 .. math::