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[AArch64] Improve regmove_costs for 128-bit types. 

2014-09-24  Wilco Dijkstra <wdijkstr@arm.com>

  gcc/
    * config/aarch64/aarch64.c (aarch64_register_move_cost): Add register move
    costs for 128-bit types.

From-SVN: r215562
This commit is contained in:
Wilco Dijkstra 2014-09-24 18:22:50 +00:00 committed by Jiong Wang
parent 6fe4595534
commit 8919453c16
2 changed files with 26 additions and 8 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-09-24 Wilco Dijkstra <wilco.dijkstra@arm.com>
* config/aarch64/aarch64.c (aarch64_register_move_cost): Add register
move costs for 128-bit types.
2014-09-24 Martin Jambor <mjambor@suse.cz>
* ipa-prop.c (ipa_edge_duplication_hook): Update controlled_use_count

29
gcc/config/aarch64/aarch64.c
View File

@ -5986,6 +5986,27 @@ aarch64_register_move_cost (enum machine_mode mode,
return aarch64_register_move_cost (mode, from, GENERAL_REGS)
+ aarch64_register_move_cost (mode, GENERAL_REGS, to);
if (GET_MODE_SIZE (mode) == 16)
{
/* 128-bit operations on general registers require 2 instructions. */
if (from == GENERAL_REGS && to == GENERAL_REGS)
return regmove_cost->GP2GP * 2;
else if (from == GENERAL_REGS)
return regmove_cost->GP2FP * 2;
else if (to == GENERAL_REGS)
return regmove_cost->FP2GP * 2;
/* When AdvSIMD instructions are disabled it is not possible to move
a 128-bit value directly between Q registers. This is handled in
secondary reload. A general register is used as a scratch to move
the upper DI value and the lower DI value is moved directly,
hence the cost is the sum of three moves. */
if (! TARGET_SIMD)
return regmove_cost->GP2FP + regmove_cost->FP2GP + regmove_cost->FP2FP;
return regmove_cost->FP2FP;
}
if (from == GENERAL_REGS && to == GENERAL_REGS)
return regmove_cost->GP2GP;
else if (from == GENERAL_REGS)
@ -5993,14 +6014,6 @@ aarch64_register_move_cost (enum machine_mode mode,
else if (to == GENERAL_REGS)
return regmove_cost->FP2GP;
/* When AdvSIMD instructions are disabled it is not possible to move
a 128-bit value directly between Q registers. This is handled in
secondary reload. A general register is used as a scratch to move
the upper DI value and the lower DI value is moved directly,
hence the cost is the sum of three moves. */
if (! TARGET_SIMD && GET_MODE_SIZE (mode) == 16)
return regmove_cost->GP2FP + regmove_cost->FP2GP + regmove_cost->FP2FP;
return regmove_cost->FP2FP;
}