Mesa (master): pan/bi: Add discard ops
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Tue Mar 3 00:21:55 UTC 2020
Module: Mesa
Branch: master
Commit: 178d9d42696876fe244543a2c897e4c702a51cbd
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=178d9d42696876fe244543a2c897e4c702a51cbd
Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date: Fri Feb 28 07:05:31 2020 -0500
pan/bi: Add discard ops
These run on the ADD unit and evidently need to be their own clause
(probably treated as a high-latency instruction). Like csel, they can
either do a float comparison directly or ingest a 0/1 value.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4025>
---
src/panfrost/bifrost/disassemble.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/panfrost/bifrost/disassemble.c b/src/panfrost/bifrost/disassemble.c
index 3e3f6a9bc6c..463eafa48a2 100644
--- a/src/panfrost/bifrost/disassemble.c
+++ b/src/panfrost/bifrost/disassemble.c
@@ -1318,6 +1318,13 @@ static const struct add_op_info add_op_infos[] = {
{ 0x18100, "LD_VAR_ADDR.f32", ADD_VARYING_ADDRESS, true },
{ 0x18200, "LD_VAR_ADDR.i32", ADD_VARYING_ADDRESS, true },
{ 0x18300, "LD_VAR_ADDR.u32", ADD_VARYING_ADDRESS, true },
+ // Conditional discards (discard_if) in NIR. Compares the first two
+ // sources and discards if the result is true
+ { 0x19181, "DISCARD.FEQ.f32", ADD_TWO_SRC, true },
+ { 0x19189, "DISCARD.FNE.f32", ADD_TWO_SRC, true },
+ { 0x1918C, "DISCARD.GL.f32", ADD_TWO_SRC, true }, /* Consumes ICMP.GL/etc with fixed 0 argument */
+ { 0x19190, "DISCARD.FLE.f32", ADD_TWO_SRC, true },
+ { 0x19198, "DISCARD.FLT.f32", ADD_TWO_SRC, true },
// Implements alpha-to-coverage, as well as possibly the late depth and
// stencil tests. The first source is the existing sample mask in R60
// (possibly modified by gl_SampleMask), and the second source is the alpha
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