Mesa (master): i965/fs: Use brw_imm_uw().

[Matt Turner]

Module: Mesa
Branch: master
Commit: 9b978046eb1d1657060365e8dcde4aad41b50af9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9b978046eb1d1657060365e8dcde4aad41b50af9

Author: Matt Turner <mattst88 at gmail.com>
Date:   Mon Nov  2 11:28:35 2015 -0800

i965/fs: Use brw_imm_uw().

W/UW immediates are 16-bits, but those 16-bits must be replicated
in the high 16-bits of the 32-bit field.

Remove the useless W/UW immediate saturating code, since we'll now be
using the appropriate immediate (and W/UW immediates in the IR can now
no longer be larger than 16-bits).

Reviewed-by: Emil Velikov <emil.velikov at collabora.co.uk>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_fs_nir.cpp |    3 +--
 src/mesa/drivers/dri/i965/brw_shader.cpp |    8 ++------
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index 8364bbf..3394e4a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -454,8 +454,7 @@ fs_visitor::optimize_frontfacing_ternary(nir_alu_instr *instr,
       tmp.subreg_offset = 2;
       tmp.stride = 2;
 
-      fs_inst *or_inst = bld.OR(tmp, g0, brw_imm_d(0x3f80));
-      or_inst->src[1].type = BRW_REGISTER_TYPE_UW;
+      bld.OR(tmp, g0, brw_imm_uw(0x3f80));
 
       tmp.type = BRW_REGISTER_TYPE_D;
       tmp.subreg_offset = 0;
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index d221648..7a236cd 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -561,16 +561,12 @@ brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    switch (type) {
    case BRW_REGISTER_TYPE_UD:
    case BRW_REGISTER_TYPE_D:
+   case BRW_REGISTER_TYPE_UW:
+   case BRW_REGISTER_TYPE_W:
    case BRW_REGISTER_TYPE_UQ:
    case BRW_REGISTER_TYPE_Q:
       /* Nothing to do. */
       return false;
-   case BRW_REGISTER_TYPE_UW:
-      sat_imm.ud = CLAMP(imm.ud, 0, USHRT_MAX);
-      break;
-   case BRW_REGISTER_TYPE_W:
-      sat_imm.d = CLAMP(imm.d, SHRT_MIN, SHRT_MAX);
-      break;
    case BRW_REGISTER_TYPE_F:
       sat_imm.f = CLAMP(imm.f, 0.0f, 1.0f);
       break;