[Mesa-dev] [PATCH 08/11] intel/compiler: fix brw_negate_immediate for 16-bit types

[Iago Toral Quiroga]

From: Jose Maria Casanova Crespo <jmcasanova at igalia.com>

16-bit immediates are replicated in each word of a 32-bit value
so we need to negate both.
---
 src/intel/compiler/brw_shader.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/intel/compiler/brw_shader.cpp b/src/intel/compiler/brw_shader.cpp
index 9cdf9fcb23d..c7edc60b63d 100644
--- a/src/intel/compiler/brw_shader.cpp
+++ b/src/intel/compiler/brw_shader.cpp
@@ -581,7 +581,8 @@ brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg)
       return true;
    case BRW_REGISTER_TYPE_W:
    case BRW_REGISTER_TYPE_UW:
-      reg->d = -(int16_t)reg->ud;
+   case BRW_REGISTER_TYPE_HF:
+      reg->ud ^= 0x80008000;
       return true;
    case BRW_REGISTER_TYPE_F:
       reg->f = -reg->f;
@@ -602,8 +603,6 @@ brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_UV:
    case BRW_REGISTER_TYPE_V:
       assert(!"unimplemented: negate UV/V immediate");
-   case BRW_REGISTER_TYPE_HF:
-      assert(!"unimplemented: negate HF immediate");
    case BRW_REGISTER_TYPE_NF:
       unreachable("no NF immediates");
    }
-- 
2.14.1