Mesa (master): nir/algebraic: Add missing 64-bit extract_[iu]8 patterns

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Module: Mesa
Branch: master
Commit: cbad201c2b34297dda11ffa414de2ef781225259
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=cbad201c2b34297dda11ffa414de2ef781225259

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Wed Feb 27 20:12:46 2019 -0800

nir/algebraic: Add missing 64-bit extract_[iu]8 patterns

No shader-db changes on any Intel platform.

v2: Use a loop to generate patterns.  Suggested by Jason.

v3: Fix a copy-and-paste bug in the extract_[ui] of ishl loop that would
replace an extract_i8 with and extract_u8.  This broke ~180 tests.  This
bug was introduced in v2.

Reviewed-by: Matt Turner <mattst88 at gmail.com> [v1]
Reviewed-by: Dylan Baker <dylan at pnwbakers.com> [v2]
Acked-by: Jason Ekstrand <jason at jlekstrand.net> [v2]

---

 src/compiler/nir/nir_opt_algebraic.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 70720efe048..42cf7673071 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -612,7 +612,9 @@ optimizations = [
 
    # Byte extraction
    (('ushr', 'a at 32', 24), ('extract_u8', a, 3), '!options->lower_extract_byte'),
+   (('ushr', 'a at 64', 56), ('extract_u8', a, 7), '!options->lower_extract_byte'),
    (('ishr', 'a at 32', 24), ('extract_i8', a, 3), '!options->lower_extract_byte'),
+   (('ishr', 'a at 64', 56), ('extract_i8', a, 7), '!options->lower_extract_byte'),
    (('iand', 0xff, a), ('extract_u8', a, 0), '!options->lower_extract_byte')
 ]
 
@@ -629,6 +631,7 @@ optimizations.extend([(('extract_u8', ('extract_u16', a, 1), 0), ('extract_u8',
 # patterns like those below.
 for op in ('extract_u8', 'extract_i8'):
    optimizations.extend([((op, ('ishl', 'a at 32', 24 - 8 * i), 3), (op, a, i)) for i in range(2, -1, -1)])
+   optimizations.extend([((op, ('ishl', 'a at 64', 56 - 8 * i), 7), (op, a, i)) for i in range(6, -1, -1)])
 
 optimizations.extend([
     # Word extraction