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| author | Kito Cheng <kito.cheng@sifive.com> | 2021-09-16 21:27:41 +0800 |
|---|---|---|
| committer | Kito Cheng <kito.cheng@sifive.com> | 2021-10-25 17:10:16 +0800 |
| commit | 77b84fb0a8eac736f456e42b6a7801a76e4644eb (patch) | |
| tree | 87f10c6aed6f9b0b9866f7b6b9e7fbf1b215ea84 /gcc | |
| parent | 4e1e0d79ecbe8727cb69d4cd97b20c71caaefafc (diff) | |
| download | gcc-77b84fb0a8eac736f456e42b6a7801a76e4644eb.zip gcc-77b84fb0a8eac736f456e42b6a7801a76e4644eb.tar.gz gcc-77b84fb0a8eac736f456e42b6a7801a76e4644eb.tar.bz2 | |
RISC-V: Cost model for ZBS extension.
gcc/ChangeLog:
* config/riscv/riscv.c (riscv_rtx_costs): Handle cost model
for zbs extension.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/riscv/riscv.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c index 3943eb4..6aef3d3 100644 --- a/gcc/config/riscv/riscv.c +++ b/gcc/config/riscv/riscv.c @@ -1852,6 +1852,24 @@ riscv_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno ATTRIBUTE_UN *total = COSTS_N_INSNS (1); return true; } + /* bclri pattern for zbs. */ + if (TARGET_ZBS + && not_single_bit_mask_operand (XEXP (x, 1), VOIDmode)) + { + *total = COSTS_N_INSNS (1); + return true; + } + /* bclr pattern for zbs. */ + if (TARGET_ZBS + && REG_P (XEXP (x, 1)) + && GET_CODE (XEXP (x, 0)) == ROTATE + && CONST_INT_P (XEXP ((XEXP (x, 0)), 0)) + && INTVAL (XEXP ((XEXP (x, 0)), 0)) == -2) + { + *total = COSTS_N_INSNS (1); + return true; + } + gcc_fallthrough (); case IOR: case XOR: @@ -1862,6 +1880,18 @@ riscv_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno ATTRIBUTE_UN *total = riscv_binary_cost (x, 1, 2); return true; } + + /* bset[i] and binv[i] pattern for zbs. */ + if ((GET_CODE (x) == IOR || GET_CODE (x) == XOR) + && TARGET_ZBS + && ((GET_CODE (XEXP (x, 0)) == ASHIFT + && CONST_INT_P (XEXP (XEXP (x, 0), 0))) + || single_bit_mask_operand (XEXP (x, 1), VOIDmode))) + { + *total = COSTS_N_INSNS (1); + return true; + } + /* Double-word operations use two single-word operations. */ *total = riscv_binary_cost (x, 1, 2); return false; @@ -1877,9 +1907,26 @@ riscv_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno ATTRIBUTE_UN *total = COSTS_N_INSNS (SINGLE_SHIFT_COST); return true; } + /* bext pattern for zbs. */ + if (TARGET_ZBS && outer_code == SET + && GET_CODE (XEXP (x, 1)) == CONST_INT + && INTVAL (XEXP (x, 1)) == 1) + { + *total = COSTS_N_INSNS (SINGLE_SHIFT_COST); + return true; + } return false; case ASHIFT: + /* bset pattern for zbs. */ + if (TARGET_ZBS + && CONST_INT_P (XEXP (x, 0)) + && INTVAL (XEXP (x, 0)) == 1) + { + *total = COSTS_N_INSNS (1); + return true; + } + gcc_fallthrough (); case ASHIFTRT: case LSHIFTRT: *total = riscv_binary_cost (x, SINGLE_SHIFT_COST, |