[AArch64 costs 16/18] Cost TRUNCATE
gcc/ * config/aarch64/aarch64.c (aarch64_rtx_costs): Cost TRUNCATE. Co-Authored-By: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> From-SVN: r210508
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@ -1,3 +1,8 @@
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2014-05-16 James Greenhalgh <james.greenhalgh@arm.com>
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Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
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* config/aarch64/aarch64.c (aarch64_rtx_costs): Cost TRUNCATE.
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2014-05-16 James Greenhalgh <james.greenhalgh@arm.com>
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Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
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@ -5724,6 +5724,39 @@ cost_plus:
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}
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return false;
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case TRUNCATE:
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/* Decompose <su>muldi3_highpart. */
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if (/* (truncate:DI */
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mode == DImode
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/* (lshiftrt:TI */
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&& GET_MODE (XEXP (x, 0)) == TImode
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&& GET_CODE (XEXP (x, 0)) == LSHIFTRT
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/* (mult:TI */
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&& GET_CODE (XEXP (XEXP (x, 0), 0)) == MULT
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/* (ANY_EXTEND:TI (reg:DI))
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(ANY_EXTEND:TI (reg:DI))) */
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&& ((GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0)) == ZERO_EXTEND
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&& GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 1)) == ZERO_EXTEND)
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|| (GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0)) == SIGN_EXTEND
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&& GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 1)) == SIGN_EXTEND))
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&& GET_MODE (XEXP (XEXP (XEXP (XEXP (x, 0), 0), 0), 0)) == DImode
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&& GET_MODE (XEXP (XEXP (XEXP (XEXP (x, 0), 0), 1), 0)) == DImode
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/* (const_int 64) */
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&& CONST_INT_P (XEXP (XEXP (x, 0), 1))
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&& UINTVAL (XEXP (XEXP (x, 0), 1)) == 64)
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{
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/* UMULH/SMULH. */
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if (speed)
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*cost += extra_cost->mult[mode == DImode].extend;
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*cost += rtx_cost (XEXP (XEXP (XEXP (XEXP (x, 0), 0), 0), 0),
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MULT, 0, speed);
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*cost += rtx_cost (XEXP (XEXP (XEXP (XEXP (x, 0), 0), 1), 0),
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MULT, 1, speed);
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return true;
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}
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/* Fall through. */
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default:
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break;
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}
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