Mesa (master): nir: Add an opcode for stomping a 32-bit value to 16-bit precision

[Jason Ekstrand]

Module: Mesa
Branch: master
Commit: de60e250f5095a9237727a3188eb0c092a4e6a05
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=de60e250f5095a9237727a3188eb0c092a4e6a05

Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Fri Mar 25 13:58:17 2016 -0700

nir: Add an opcode for stomping a 32-bit value to 16-bit precision

This correlates directly to the SPIR-V opcode OpQuantizeToF16

Reviewed-by: Rob Clark <robdclark at gmail.com>

---

 src/compiler/nir/nir_opcodes.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index 553f924..bc98450 100644
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -180,6 +180,7 @@ unop("ffloor", tfloat, "bit_size == 64 ? floor(src0) : floorf(src0)")
 unop("ffract", tfloat, "src0 - (bit_size == 64 ? floor(src0) : floorf(src0))")
 unop("fround_even", tfloat, "bit_size == 64 ? _mesa_roundeven(src0) : _mesa_roundevenf(src0)")
 
+unop("fquantize2f16", tfloat, "(fabs(src0) < ldexpf(1.0, -14)) ? copysignf(0.0f, src0) : _mesa_half_to_float(_mesa_float_to_half(src0))")
 
 # Trigonometric operations.