The second patch updates the Cortex-A57 scheduler now that we can differentiate betwe...

The second patch updates the Cortex-A57 scheduler now that we can differentiate
between shifts and bitfield inserts.  The Cortex-A57 Software Optimization Guide
indicates that BFM operations use the integer multi-cycle pipeline, while ARM
UXTB/H instructions use the Integer 1 or Integer 0 pipelines, so swap the bfm
and extend reservations.  This results in minor scheduling differences.

	* config/arm/cortex-a57.md (cortex_a57_alu): Move extend here, bfm...
	(cortex_a57_alu_shift): ...here.

From-SVN: r242385

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 07173ab..e1306dc 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2016-11-14  Wilco Dijkstra  <wdijkstr@arm.com>
 
+       * config/arm/cortex-a57.md (cortex_a57_alu): Move extend here, bfm...
+       (cortex_a57_alu_shift): ...here.
+
+2016-11-14  Wilco Dijkstra  <wdijkstr@arm.com>
+
        * config/aarch64/aarch64.md (aarch64_ashl_sisd_or_int_<mode>3)
        Use bfx attribute.
        (aarch64_lshr_sisd_or_int_<mode>3): Likewise.

diff --git a/gcc/config/arm/cortex-a57.md b/gcc/config/arm/cortex-a57.md
index da46184..6307250 100644 (file)
--- a/gcc/config/arm/cortex-a57.md
+++ b/gcc/config/arm/cortex-a57.md
@@ -297,7 +297,7 @@
        (eq_attr "type" "alu_imm,alus_imm,logic_imm,logics_imm,\
                        alu_sreg,alus_sreg,logic_reg,logics_reg,\
                        adc_imm,adcs_imm,adc_reg,adcs_reg,\
-                       adr,bfm,bfx,clz,rbit,rev,alu_dsp_reg,\
+                       adr,bfx,extend,clz,rbit,rev,alu_dsp_reg,\
                        rotate_imm,shift_imm,shift_reg,\
                        mov_imm,mov_reg,\
                        mvn_imm,mvn_reg,\
@@ -307,7 +307,7 @@
 ;; ALU ops with immediate shift
 (define_insn_reservation "cortex_a57_alu_shift" 3
   (and (eq_attr "tune" "cortexa57")
-       (eq_attr "type" "extend,\
+       (eq_attr "type" "bfm,\
                        alu_shift_imm,alus_shift_imm,\
                        crc,logic_shift_imm,logics_shift_imm,\
                        mov_shift,mvn_shift"))