[Mesa-dev] [PATCH 53/59] intel/compiler: implement is_zero, is_one, is_negative_one for 8-bit/16-bit

[Iago Toral Quiroga]

There are no 8-bit immediates, so assert in that case.
16-bit immediates are replicated in each word of a 32-bit immediate, so
we only need to check the lower 16-bits.
---
 src/intel/compiler/brw_shader.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/src/intel/compiler/brw_shader.cpp b/src/intel/compiler/brw_shader.cpp
index b77bd798d17..9999adbb52f 100644
--- a/src/intel/compiler/brw_shader.cpp
+++ b/src/intel/compiler/brw_shader.cpp
@@ -708,11 +708,18 @@ backend_reg::is_zero() const
    if (file != IMM)
       return false;
 
+   assert(type_sz(type) > 1);
+
    switch (type) {
+   case BRW_REGISTER_TYPE_HF:
+      return (d & 0xffff) == 0;
    case BRW_REGISTER_TYPE_F:
       return f == 0;
    case BRW_REGISTER_TYPE_DF:
       return df == 0;
+   case BRW_REGISTER_TYPE_W:
+   case BRW_REGISTER_TYPE_UW:
+      return (d & 0xffff) == 0;
    case BRW_REGISTER_TYPE_D:
    case BRW_REGISTER_TYPE_UD:
       return d == 0;
@@ -730,11 +737,18 @@ backend_reg::is_one() const
    if (file != IMM)
       return false;
 
+   assert(type_sz(type) > 1);
+
    switch (type) {
+   case BRW_REGISTER_TYPE_HF:
+      return (d & 0xffff) == 0x3c00;
    case BRW_REGISTER_TYPE_F:
       return f == 1.0f;
    case BRW_REGISTER_TYPE_DF:
       return df == 1.0;
+   case BRW_REGISTER_TYPE_W:
+   case BRW_REGISTER_TYPE_UW:
+      return (d & 0xffff) == 1;
    case BRW_REGISTER_TYPE_D:
    case BRW_REGISTER_TYPE_UD:
       return d == 1;
@@ -752,11 +766,17 @@ backend_reg::is_negative_one() const
    if (file != IMM)
       return false;
 
+   assert(type_sz(type) > 1);
+
    switch (type) {
+   case BRW_REGISTER_TYPE_HF:
+      return (d & 0xffff) == 0xbc00;
    case BRW_REGISTER_TYPE_F:
       return f == -1.0;
    case BRW_REGISTER_TYPE_DF:
       return df == -1.0;
+   case BRW_REGISTER_TYPE_W:
+      return (d & 0xffff) == -1;
    case BRW_REGISTER_TYPE_D:
       return d == -1;
    case BRW_REGISTER_TYPE_Q:
-- 
2.17.1