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FPU: Implement fadd[s] and fsub[s] and add tests for them

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Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
pull/245/head
Paul Mackerras 4 years ago
parent 4807d0bdb6
commit 86b826cd7e
5 changed files with 322 additions and 3 deletions
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19
decode1.vhdl
Unescape Escape View File

@ -58,6 +58,7 @@ architecture behaviour of decode1 is
type op_59_subop_array_t is array(0 to 31) of decode_rom_t; type op_59_subop_array_t is array(0 to 31) of decode_rom_t;
type minor_rom_array_2_t is array(0 to 3) of decode_rom_t; type minor_rom_array_2_t is array(0 to 3) of decode_rom_t;
type op_63_subop_array_0_t is array(0 to 511) of decode_rom_t; type op_63_subop_array_0_t is array(0 to 511) of decode_rom_t;
type op_63_subop_array_1_t is array(0 to 16) of decode_rom_t;


constant major_decode_rom_array : major_rom_array_t := ( constant major_decode_rom_array : major_rom_array_t := (
-- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl -- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl
@ -415,6 +416,8 @@ architecture behaviour of decode1 is
-- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl -- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl
-- op in out A out in out len ext pipe -- op in out A out in out len ext pipe
2#01110# => (FPU, OP_FPOP_I, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0'), -- fcfid[u]s 2#01110# => (FPU, OP_FPOP_I, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0'), -- fcfid[u]s
2#10100# => (FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0'), -- fsubs
2#10101# => (FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0'), -- fadds
others => illegal_inst others => illegal_inst
); );


@ -461,6 +464,15 @@ architecture behaviour of decode1 is
others => illegal_inst others => illegal_inst
); );


-- indexed by bits 4..1 of instruction word
constant decode_op_63h_array : op_63_subop_array_1_t := (
-- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl
-- op in out A out in out len ext pipe
2#0100# => (FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0'), -- fsub
2#0101# => (FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0'), -- fadd
others => illegal_inst
);

-- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl -- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl
-- op in out A out in out len ext pipe -- op in out A out in out len ext pipe
constant nop_instr : decode_rom_t := (ALU, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'); constant nop_instr : decode_rom_t := (ALU, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0');
@ -626,8 +638,11 @@ begin
when 63 => when 63 =>
if HAS_FPU then if HAS_FPU then
-- floating point operations, general and double-precision -- floating point operations, general and double-precision
v.decode := decode_op_63l_array(to_integer(unsigned(f_in.insn(4 downto 1) & f_in.insn(10 downto 6)))); if f_in.insn(5) = '0' then
vi.override := f_in.insn(5); v.decode := decode_op_63l_array(to_integer(unsigned(f_in.insn(4 downto 1) & f_in.insn(10 downto 6))));
else
v.decode := decode_op_63h_array(to_integer(unsigned(f_in.insn(4 downto 1))));
end if;
end if; end if;


when others => when others =>

150
fpu.vhdl
Unescape Escape View File

@ -40,7 +40,9 @@ architecture behaviour of fpu is
DO_FMR, DO_FMRG, DO_FMR, DO_FMRG,
DO_FCFID, DO_FCTI, DO_FCFID, DO_FCTI,
DO_FRSP, DO_FRI, DO_FRSP, DO_FRI,
DO_FADD,
FRI_1, FRI_1,
ADD_SHIFT, ADD_2, ADD_3,
INT_SHIFT, INT_ROUND, INT_ISHIFT, INT_SHIFT, INT_ROUND, INT_ISHIFT,
INT_FINAL, INT_CHECK, INT_OFLOW, INT_FINAL, INT_CHECK, INT_OFLOW,
FINISH, NORMALIZE, FINISH, NORMALIZE,
@ -79,6 +81,9 @@ architecture behaviour of fpu is
tiny : std_ulogic; tiny : std_ulogic;
denorm : std_ulogic; denorm : std_ulogic;
round_mode : std_ulogic_vector(2 downto 0); round_mode : std_ulogic_vector(2 downto 0);
is_subtract : std_ulogic;
exp_cmp : std_ulogic;
add_bsmall : std_ulogic;
end record; end record;


signal r, rin : reg_type; signal r, rin : reg_type;
@ -89,6 +94,7 @@ architecture behaviour of fpu is
signal opsel_r : std_ulogic_vector(1 downto 0); signal opsel_r : std_ulogic_vector(1 downto 0);
signal opsel_ainv : std_ulogic; signal opsel_ainv : std_ulogic;
signal opsel_amask : std_ulogic; signal opsel_amask : std_ulogic;
signal opsel_binv : std_ulogic;
signal in_a : std_ulogic_vector(63 downto 0); signal in_a : std_ulogic_vector(63 downto 0);
signal in_b : std_ulogic_vector(63 downto 0); signal in_b : std_ulogic_vector(63 downto 0);
signal result : std_ulogic_vector(63 downto 0); signal result : std_ulogic_vector(63 downto 0);
@ -368,6 +374,9 @@ begin
variable mshift : signed(EXP_BITS-1 downto 0); variable mshift : signed(EXP_BITS-1 downto 0);
variable need_check : std_ulogic; variable need_check : std_ulogic;
variable msb : std_ulogic; variable msb : std_ulogic;
variable is_add : std_ulogic;
variable qnan_result : std_ulogic;
variable longmask : std_ulogic;
begin begin
v := r; v := r;
illegal := '0'; illegal := '0';
@ -397,10 +406,16 @@ begin
v.tiny := '0'; v.tiny := '0';
v.denorm := '0'; v.denorm := '0';
v.round_mode := '0' & r.fpscr(FPSCR_RN+1 downto FPSCR_RN); v.round_mode := '0' & r.fpscr(FPSCR_RN+1 downto FPSCR_RN);
v.is_subtract := '0';
v.add_bsmall := '0';
adec := decode_dp(e_in.fra, int_input); adec := decode_dp(e_in.fra, int_input);
bdec := decode_dp(e_in.frb, int_input); bdec := decode_dp(e_in.frb, int_input);
v.a := adec; v.a := adec;
v.b := bdec; v.b := bdec;
v.exp_cmp := '0';
if adec.exponent > bdec.exponent then
v.exp_cmp := '1';
end if;
end if; end if;


r_hi_nz <= or (r.r(55 downto 31)); r_hi_nz <= or (r.r(55 downto 31));
@ -433,6 +448,7 @@ begin
opsel_ainv <= '0'; opsel_ainv <= '0';
opsel_amask <= '0'; opsel_amask <= '0';
opsel_b <= BIN_ZERO; opsel_b <= BIN_ZERO;
opsel_binv <= '0';
opsel_r <= RES_SUM; opsel_r <= RES_SUM;
carry_in <= '0'; carry_in <= '0';
misc_sel <= "0000"; misc_sel <= "0000";
@ -442,6 +458,8 @@ begin
invalid := '0'; invalid := '0';
renormalize := '0'; renormalize := '0';
set_x := '0'; set_x := '0';
qnan_result := '0';
longmask := r.single_prec;


case r.state is case r.state is
when IDLE => when IDLE =>
@ -483,6 +501,8 @@ begin
when "01111" => when "01111" =>
v.round_mode := "001"; v.round_mode := "001";
v.state := DO_FCTI; v.state := DO_FCTI;
when "10100" | "10101" =>
v.state := DO_FADD;
when others => when others =>
illegal := '1'; illegal := '1';
end case; end case;
@ -717,6 +737,117 @@ begin
v.state := FINISH; v.state := FINISH;
end if; end if;


when DO_FADD =>
-- fadd[s] and fsub[s]
opsel_a <= AIN_A;
v.result_sign := r.a.negative;
v.result_class := r.a.class;
v.result_exp := r.a.exponent;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
is_add := r.a.negative xor r.b.negative xor r.insn(1);
if r.a.class = FINITE and r.b.class = FINITE then
v.is_subtract := not is_add;
v.add_bsmall := r.exp_cmp;
if r.exp_cmp = '0' then
v.shift := r.a.exponent - r.b.exponent;
v.result_sign := r.b.negative xnor r.insn(1);
if r.a.exponent = r.b.exponent then
v.state := ADD_2;
else
v.state := ADD_SHIFT;
end if;
else
opsel_a <= AIN_B;
v.shift := r.b.exponent - r.a.exponent;
v.result_exp := r.b.exponent;
v.state := ADD_SHIFT;
end if;
else
if (r.a.class = NAN and r.a.mantissa(53) = '0') or
(r.b.class = NAN and r.b.mantissa(53) = '0') then
-- Signalling NAN
v.fpscr(FPSCR_VXSNAN) := '1';
invalid := '1';
end if;
if r.a.class = NAN then
-- nothing to do, result is A
elsif r.b.class = NAN then
v.result_class := NAN;
v.result_sign := r.b.negative;
opsel_a <= AIN_B;
elsif r.a.class = INFINITY and r.b.class = INFINITY and is_add = '0' then
-- invalid operation, construct QNaN
v.fpscr(FPSCR_VXISI) := '1';
qnan_result := '1';
elsif r.a.class = ZERO and r.b.class = ZERO and is_add = '0' then
-- return -0 for rounding to -infinity
v.result_sign := r.round_mode(1) and r.round_mode(0);
elsif r.a.class = INFINITY or r.b.class = ZERO then
-- nothing to do, result is A
else
-- result is +/- B
v.result_sign := r.b.negative xnor r.insn(1);
v.result_class := r.b.class;
v.result_exp := r.b.exponent;
opsel_a <= AIN_B;
end if;
arith_done := '1';
end if;

when ADD_SHIFT =>
opsel_r <= RES_SHIFT;
set_x := '1';
longmask := '0';
v.state := ADD_2;

when ADD_2 =>
if r.add_bsmall = '1' then
opsel_a <= AIN_A;
else
opsel_a <= AIN_B;
end if;
opsel_b <= BIN_R;
opsel_binv <= r.is_subtract;
carry_in <= r.is_subtract and not r.x;
v.shift := to_signed(-1, EXP_BITS);
v.state := ADD_3;

when ADD_3 =>
-- check for overflow or negative result (can't get both)
if r.r(63) = '1' then
-- result is opposite sign to expected
v.result_sign := not r.result_sign;
opsel_ainv <= '1';
carry_in <= '1';
v.state := FINISH;
elsif r.r(55) = '1' then
-- sum overflowed, shift right
opsel_r <= RES_SHIFT;
set_x := '1';
v.shift := to_signed(-2, EXP_BITS);
if exp_huge = '1' then
v.state := ROUND_OFLOW;
else
v.state := ROUNDING;
end if;
elsif r.r(54) = '1' then
set_x := '1';
v.shift := to_signed(-2, EXP_BITS);
v.state := ROUNDING;
elsif (r_hi_nz or r_lo_nz or r.r(1) or r.r(0)) = '0' then
-- r.x must be zero at this point
v.result_class := ZERO;
if r.is_subtract = '1' then
-- set result sign depending on rounding mode
v.result_sign := r.round_mode(1) and r.round_mode(0);
end if;
arith_done := '1';
else
renormalize := '1';
v.state := NORMALIZE;
end if;

when INT_SHIFT => when INT_SHIFT =>
opsel_r <= RES_SHIFT; opsel_r <= RES_SHIFT;
set_x := '1'; set_x := '1';
@ -927,6 +1058,10 @@ begin
mant_nz := r_hi_nz or (r_lo_nz and not r.single_prec); mant_nz := r_hi_nz or (r_lo_nz and not r.single_prec);
if mant_nz = '0' then if mant_nz = '0' then
v.result_class := ZERO; v.result_class := ZERO;
if r.is_subtract = '1' then
-- set result sign depending on rounding mode
v.result_sign := r.round_mode(1) and r.round_mode(0);
end if;
arith_done := '1'; arith_done := '1';
else else
-- Renormalize result after rounding -- Renormalize result after rounding
@ -946,6 +1081,13 @@ begin


end case; end case;


if qnan_result = '1' then
invalid := '1';
v.result_class := NAN;
v.result_sign := '0';
misc_sel <= "0001";
opsel_r <= RES_MISC;
end if;
if arith_done = '1' then if arith_done = '1' then
-- Enabled invalid exception doesn't write result or FPRF -- Enabled invalid exception doesn't write result or FPRF
if (invalid and r.fpscr(FPSCR_VE)) = '0' then if (invalid and r.fpscr(FPSCR_VE)) = '0' then
@ -960,7 +1102,7 @@ begin
-- Data path. -- Data path.
-- This has A and B input multiplexers, an adder, a shifter, -- This has A and B input multiplexers, an adder, a shifter,
-- count-leading-zeroes logic, and a result mux. -- count-leading-zeroes logic, and a result mux.
if r.single_prec = '1' then if longmask = '1' then
mshift := r.shift + to_signed(-29, EXP_BITS); mshift := r.shift + to_signed(-29, EXP_BITS);
else else
mshift := r.shift; mshift := r.shift;
@ -1000,6 +1142,9 @@ begin
when others => when others =>
in_b0 := (others => '0'); in_b0 := (others => '0');
end case; end case;
if opsel_binv = '1' then
in_b0 := not in_b0;
end if;
in_b <= in_b0; in_b <= in_b0;
if r.shift >= to_signed(-64, EXP_BITS) and r.shift <= to_signed(63, EXP_BITS) then if r.shift >= to_signed(-64, EXP_BITS) and r.shift <= to_signed(63, EXP_BITS) then
shift_res := shifter_64(r.r & x"00000000000000", shift_res := shifter_64(r.r & x"00000000000000",
@ -1016,6 +1161,9 @@ begin
case misc_sel is case misc_sel is
when "0000" => when "0000" =>
misc := x"00000000" & (r.fpscr and fpscr_mask); misc := x"00000000" & (r.fpscr and fpscr_mask);
when "0001" =>
-- generated QNaN mantissa
misc := x"0020000000000000";
when "0010" => when "0010" =>
-- mantissa of max representable DP number -- mantissa of max representable DP number
misc := x"007ffffffffffffc"; misc := x"007ffffffffffffc";

154
tests/fpu/fpu.c
Unescape Escape View File

@ -843,6 +843,158 @@ int fpu_test_12(void)
return trapit(0, test12); return trapit(0, test12);
} }


struct addvals {
unsigned long val_a;
unsigned long val_b;
unsigned long sum;
unsigned long diff;
} addvals[] = {
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x3fdfffffffffffff, 0x0000000000000000, 0x3fdfffffffffffff, 0x3fdfffffffffffff },
{ 0x3ff0000000000000, 0x3ff0000000000000, 0x4000000000000000, 0x0000000000000000 },
{ 0xbff0000000000000, 0xbff0000000000000, 0xc000000000000000, 0x0000000000000000 },
{ 0x402123456789abcd, 0x4021000000000000, 0x403111a2b3c4d5e6, 0x3fb1a2b3c4d5e680 },
{ 0x4061200000000000, 0x406123456789abcd, 0x407121a2b3c4d5e6, 0xbfba2b3c4d5e6800 },
{ 0x4061230000000000, 0x3fa4560000000000, 0x4061244560000000, 0x406121baa0000000 },
{ 0xc061230000000000, 0x3fa4560000000000, 0xc06121baa0000000, 0xc061244560000000 },
{ 0x4061230000000000, 0xbfa4560000000000, 0x406121baa0000000, 0x4061244560000000 },
{ 0xc061230000000000, 0xbfa4560000000000, 0xc061244560000000, 0xc06121baa0000000 },
{ 0x3fa1230000000000, 0x4064560000000000, 0x4064571230000000, 0xc06454edd0000000 },
{ 0xbfa1230000000000, 0x4064560000000000, 0x406454edd0000000, 0xc064571230000000 },
{ 0x3fa1230000000000, 0xc064560000000000, 0xc06454edd0000000, 0x4064571230000000 },
{ 0xbfa1230000000000, 0xc064560000000000, 0xc064571230000000, 0x406454edd0000000 },
{ 0x6780000000000001, 0x6470000000000000, 0x6780000000000009, 0x677ffffffffffff2 },
{ 0x6780000000000001, 0x6460000000000000, 0x6780000000000005, 0x677ffffffffffffa },
{ 0x6780000000000001, 0x6450000000000000, 0x6780000000000003, 0x677ffffffffffffe },
{ 0x6780000000000001, 0x6440000000000000, 0x6780000000000002, 0x6780000000000000 },
{ 0x7ff8888888888888, 0x7ff9999999999999, 0x7ff8888888888888, 0x7ff8888888888888 },
{ 0xfff8888888888888, 0x7ff9999999999999, 0xfff8888888888888, 0xfff8888888888888 },
{ 0x7ff8888888888888, 0x7ff0000000000000, 0x7ff8888888888888, 0x7ff8888888888888 },
{ 0x7ff8888888888888, 0x0000000000000000, 0x7ff8888888888888, 0x7ff8888888888888 },
{ 0x7ff8888888888888, 0x0001111111111111, 0x7ff8888888888888, 0x7ff8888888888888 },
{ 0x7ff8888888888888, 0x3ff0000000000000, 0x7ff8888888888888, 0x7ff8888888888888 },
{ 0x7ff0000000000000, 0x7ff9999999999999, 0x7ff9999999999999, 0x7ff9999999999999 },
{ 0x7ff0000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x7ff0000000000000, 0xfff0000000000000, 0x7ff8000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x0000000000000000, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x8000000000000000, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x8002222222222222, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0xc002222222222222, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x0000000000000000, 0x7ff9999999999999, 0x7ff9999999999999, 0x7ff9999999999999 },
{ 0x0000000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0xfff0000000000000 },
{ 0x8000000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0xfff0000000000000 },
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x8002222222222222, 0x0001111111111111, 0x8001111111111111, 0x8003333333333333 },
{ 0x0000022222222222, 0x0000111111111111, 0x0000133333333333, 0x80000eeeeeeeeeef },
{ 0x401ffffffbfffefe, 0x406b8265196bd89e, 0x406c8265194bd896, 0xc06a8265198bd8a6 },
{ 0x4030020000000004, 0xbf110001ffffffff, 0x403001fbbfff8004, 0x4030020440008004 },
{ 0x3fdfffffffffffff, 0x3fe0000000000000, 0x3ff0000000000000, 0xbc90000000000000 },
};

int test13(long arg)
{
long i;
unsigned long results[2];
struct addvals *vp = addvals;

set_fpscr(FPS_RN_NEAR);
for (i = 0; i < sizeof(addvals) / sizeof(addvals[0]); ++i, ++vp) {
asm("lfd 5,0(%0); lfd 6,8(%0); fadd 7,5,6; fsub 8,5,6; stfd 7,0(%1); stfd 8,8(%1)"
: : "b" (&vp->val_a), "b" (results) : "memory");
if (results[0] != vp->sum || results[1] != vp->diff) {
print_hex(i, 2, " ");
print_hex(results[0], 16, " ");
print_hex(results[1], 16, "\r\n");
return i + 1;
}
}
return 0;
}

int fpu_test_13(void)
{
enable_fp();
return trapit(0, test13);
}

struct addvals sp_addvals[] = {
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x3fdfffffffffffff, 0x0000000000000000, 0x3fe0000000000000, 0x3fe0000000000000 },
{ 0x3ff0000000000000, 0x3ff0000000000000, 0x4000000000000000, 0x0000000000000000 },
{ 0xbff0000000000000, 0xbff0000000000000, 0xc000000000000000, 0x0000000000000000 },
{ 0x402123456789abcd, 0x4021000000000000, 0x403111a2c0000000, 0x3fb1a2b000000000 },
{ 0x4061200000000000, 0x406123456789abcd, 0x407121a2c0000000, 0xbfba2b0000000000 },
{ 0x4061230000000000, 0x3fa4560000000000, 0x4061244560000000, 0x406121baa0000000 },
{ 0xc061230000000000, 0x3fa4560000000000, 0xc06121baa0000000, 0xc061244560000000 },
{ 0x4061230000000000, 0xbfa4560000000000, 0x406121baa0000000, 0x4061244560000000 },
{ 0xc061230000000000, 0xbfa4560000000000, 0xc061244560000000, 0xc06121baa0000000 },
{ 0x3fa1230000000000, 0x4064560000000000, 0x4064571240000000, 0xc06454edc0000000 },
{ 0xbfa1230000000000, 0x4064560000000000, 0x406454edc0000000, 0xc064571240000000 },
{ 0x3fa1230000000000, 0xc064560000000000, 0xc06454edc0000000, 0x4064571240000000 },
{ 0xbfa1230000000000, 0xc064560000000000, 0xc064571240000000, 0x406454edc0000000 },
{ 0x6780000000000001, 0x6470000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x6780000000000001, 0x6460000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x6780000000000001, 0x6450000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x6780000000000001, 0x6440000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x7ff8888888888888, 0x7ff9999999999999, 0x7ff8888880000000, 0x7ff8888880000000 },
{ 0xfff8888888888888, 0x7ff9999999999999, 0xfff8888880000000, 0xfff8888880000000 },
{ 0x7ff8888888888888, 0x7ff0000000000000, 0x7ff8888880000000, 0x7ff8888880000000 },
{ 0x7ff8888888888888, 0x0000000000000000, 0x7ff8888880000000, 0x7ff8888880000000 },
{ 0x7ff8888888888888, 0x0001111111111111, 0x7ff8888880000000, 0x7ff8888880000000 },
{ 0x7ff8888888888888, 0x3ff0000000000000, 0x7ff8888880000000, 0x7ff8888880000000 },
{ 0x7ff0000000000000, 0x7ff9999999999999, 0x7ff9999980000000, 0x7ff9999980000000 },
{ 0x7ff0000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0x7ff8000000000000 },
{ 0x7ff0000000000000, 0xfff0000000000000, 0x7ff8000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x0000000000000000, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x8000000000000000, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0x8002222222222222, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x7ff0000000000000, 0xc002222222222222, 0x7ff0000000000000, 0x7ff0000000000000 },
{ 0x0000000000000000, 0x7ff9999999999999, 0x7ff9999980000000, 0x7ff9999980000000 },
{ 0x0000000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0xfff0000000000000 },
{ 0x8000000000000000, 0x7ff0000000000000, 0x7ff0000000000000, 0xfff0000000000000 },
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x0000000000000000, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x8000000000000000, 0x8000000000000000, 0x8000000000000000, 0x0000000000000000 },
{ 0x8002222222222222, 0x0001111111111111, 0x0000000000000000, 0x8000000000000000 },
{ 0x0000022222222222, 0x0000111111111111, 0x0000000000000000, 0x0000000000000000 },
{ 0x47dc000020000000, 0x47ec03ffe0000000, 0x7ff0000000000000, 0xc7dc07ffa0000000 },
{ 0x47dbffffe0000000, 0x47eff7ffe0000000, 0x7ff0000000000000, 0xc7e1f80000000000 },
{ 0x47efffffc0000000, 0xc7efffffc0000000, 0x0000000000000000, 0x7ff0000000000000 },
};

int test14(long arg)
{
long i;
unsigned long results[2];
struct addvals *vp = sp_addvals;

set_fpscr(FPS_RN_NEAR);
for (i = 0; i < sizeof(sp_addvals) / sizeof(sp_addvals[0]); ++i, ++vp) {
asm("lfd 5,0(%0); frsp 5,5; lfd 6,8(%0); frsp 6,6; "
"fadds 7,5,6; fsubs 8,5,6; stfd 7,0(%1); stfd 8,8(%1)"
: : "b" (&vp->val_a), "b" (results) : "memory");
if (results[0] != vp->sum || results[1] != vp->diff) {
print_hex(i, 2, " ");
print_hex(results[0], 16, " ");
print_hex(results[1], 16, "\r\n");
return i + 1;
}
}
return 0;
}

int fpu_test_14(void)
{
enable_fp();
return trapit(0, test14);
}

int fail = 0; int fail = 0;


void do_test(int num, int (*test)(void)) void do_test(int num, int (*test)(void))
@ -880,6 +1032,8 @@ int main(void)
do_test(10, fpu_test_10); do_test(10, fpu_test_10);
do_test(11, fpu_test_11); do_test(11, fpu_test_11);
do_test(12, fpu_test_12); do_test(12, fpu_test_12);
do_test(13, fpu_test_13);
do_test(14, fpu_test_14);


return fail; return fail;
} }

BIN
tests/test_fpu.bin
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2
tests/test_fpu.console_out
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@ -10,3 +10,5 @@ test 09:PASS
test 10:PASS test 10:PASS
test 11:PASS test 11:PASS
test 12:PASS test 12:PASS
test 13:PASS
test 14:PASS

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