mirror of
https://github.com/antonblanchard/microwatt.git
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45cd8f4fc3
This extends the register file so it can hold FPR values, and implements the FP loads and stores that do not require conversion between single and double precision. We now have the FP, FE0 and FE1 bits in MSR. FP loads and stores cause a FP unavailable interrupt if MSR[FP] = 0. The FPU facilities are optional and their presence is controlled by the HAS_FPU generic passed down from the top-level board file. It defaults to true for all except the A7-35 boards. Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
242 lines
8.3 KiB
VHDL
242 lines
8.3 KiB
VHDL
library ieee;
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use ieee.std_logic_1164.all;
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package insn_helpers is
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function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_rcreg (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_l (insn_in : std_ulogic_vector) return std_ulogic;
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function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_lk (insn_in : std_ulogic_vector) return std_ulogic;
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function insn_aa (insn_in : std_ulogic_vector) return std_ulogic;
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function insn_rc (insn_in : std_ulogic_vector) return std_ulogic;
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function insn_oe (insn_in : std_ulogic_vector) return std_ulogic;
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function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_cr (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bt (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_ba (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bb (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_dx (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_frt (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_fra (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_frb (insn_in : std_ulogic_vector) return std_ulogic_vector;
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function insn_frc (insn_in : std_ulogic_vector) return std_ulogic_vector;
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end package insn_helpers;
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package body insn_helpers is
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function insn_rs (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_rt (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_ra (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(20 downto 16);
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end;
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function insn_rb (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 11);
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end;
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function insn_rcreg (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(10 downto 6);
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end;
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function insn_si (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 0);
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end;
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function insn_ui (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 0);
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end;
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function insn_l (insn_in : std_ulogic_vector) return std_ulogic is
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begin
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return insn_in(21);
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end;
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function insn_sh32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 11);
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end;
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function insn_mb32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(10 downto 6);
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end;
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function insn_me32 (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(5 downto 1);
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end;
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function insn_li (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 2);
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end;
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function insn_lk (insn_in : std_ulogic_vector) return std_ulogic is
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begin
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return insn_in(0);
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end;
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function insn_aa (insn_in : std_ulogic_vector) return std_ulogic is
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begin
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return insn_in(1);
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end;
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function insn_rc (insn_in : std_ulogic_vector) return std_ulogic is
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begin
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return insn_in(0);
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end;
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function insn_oe (insn_in : std_ulogic_vector) return std_ulogic is
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begin
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return insn_in(10);
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end;
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function insn_bd (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 2);
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end;
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function insn_bf (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 23);
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end;
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function insn_bfa (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(20 downto 18);
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end;
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function insn_cr (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(10 downto 1);
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end;
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function insn_bb (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 11);
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end;
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function insn_ba (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(20 downto 16);
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end;
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function insn_bt (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_fxm (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(19 downto 12);
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end;
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function insn_bo (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_bi (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(20 downto 16);
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end;
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function insn_bh (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(12 downto 11);
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end;
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function insn_d (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 0);
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end;
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function insn_ds (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 2);
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end;
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function insn_dx (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 6) & insn_in(20 downto 16) & insn_in(0);
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end;
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function insn_to (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_bc (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(10 downto 6);
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end;
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function insn_sh (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(1) & insn_in(15 downto 11);
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end;
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function insn_me (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(5) & insn_in(10 downto 6);
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end;
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function insn_mb (insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(5) & insn_in(10 downto 6);
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end;
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function insn_frt(insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(25 downto 21);
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end;
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function insn_fra(insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(20 downto 16);
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end;
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function insn_frb(insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(15 downto 11);
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end;
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function insn_frc(insn_in : std_ulogic_vector) return std_ulogic_vector is
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begin
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return insn_in(10 downto 6);
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end;
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end package body insn_helpers;
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