Mesa (master): i965/blorp: Emit MADs.
Matt Turner
mattst88 at kemper.freedesktop.org
Fri Feb 20 05:17:39 UTC 2015
Module: Mesa
Branch: master
Commit: dada30462b8469509ef16fbc351764d42320b236
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=dada30462b8469509ef16fbc351764d42320b236
Author: Matt Turner <mattst88 at gmail.com>
Date: Mon Feb 9 22:54:51 2015 -0800
i965/blorp: Emit MADs.
Low hanging fruit: cuts a couple of instructions.
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/mesa/drivers/dri/i965/brw_blorp_blit.cpp | 6 ++----
src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h | 9 +++++++++
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
index fc111ae..5c936cf 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
@@ -1255,10 +1255,8 @@ brw_blorp_blit_program::translate_dst_to_src()
emit_mov(Xp_f, X);
emit_mov(Yp_f, Y);
/* Scale and offset */
- emit_mul(X_f, Xp_f, x_transform.multiplier);
- emit_mul(Y_f, Yp_f, y_transform.multiplier);
- emit_add(X_f, X_f, x_transform.offset);
- emit_add(Y_f, Y_f, y_transform.offset);
+ emit_mad(X_f, x_transform.offset, Xp_f, x_transform.multiplier);
+ emit_mad(Y_f, y_transform.offset, Yp_f, y_transform.multiplier);
if (key->blit_scaled && key->blend) {
/* Translate coordinates to lay out the samples in a rectangular grid
* roughly corresponding to sample locations.
diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h
index bfad422..8e44eb4 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_blorp_blit_eu.h
@@ -85,6 +85,15 @@ protected:
new (mem_ctx) fs_inst(BRW_OPCODE_LRP, 16, dst, src1, src2, src3));
}
+ inline void emit_mad(const struct brw_reg &dst,
+ const struct brw_reg &src1,
+ const struct brw_reg &src2,
+ const struct brw_reg &src3)
+ {
+ insts.push_tail(
+ new (mem_ctx) fs_inst(BRW_OPCODE_MAD, 16, dst, src1, src2, src3));
+ }
+
inline void emit_min(const struct brw_reg& dst,
const struct brw_reg& src1,
const struct brw_reg& src2)
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