This patch adds a file for all the FPU related helpers with all the includes,
useful defines, and a function to update the status bits. Additionally it adds
a mask for the rounding mode bits of PSW as well as all the opcodes for the
FPU instructions.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <1457708597-3025-2-git-send-email-kbastian@mail.uni-paderborn.de>
This instruction was introduced by the new Aurix platform.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Those instruction were introduced in the new Aurix platform.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Those instruction were introduced in the new Aurix platform.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
The lower part of the combined offset was sign extended and could lead to
wrong results.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Add helpers helper_subadr_h/_ssov which subs one halfword and adds one
halfword, rounds / and saturates each half word independently.
Add microcode helper functions:
* gen_msubad_h/ads_h: multiply two halfwords left justified and sub from the
first one word and add the second one word
/ and saturate each resulting word independetly.
* gen_msubadm_h/adms_h: multiply two halfwords in q-format left justified
and sub from the first one word and add to
the second one word / and saturate each resulting
word independetly.
* gen_msubadr32_h/32s_h: multiply two halfwords in q-format left justified
and sub from the first one word and add to
the second one word, round both results / and
saturate each resulting word independetly.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Add helpers:
* msub64_q_ssov: multiply two 32 bit q-format number, sub the result from a
64 bit q-format number and saturate.
* msub32_q_sub_ssov: sub two 64 bit q-format numbers and return a 32 bit
result.
* msubr_q_ssov: multiply two 32 bit q-format numbers, sub the result from a 32 bit
q-format number and saturate.
* msubr_q: multiply two 32 bit q-format numbers and sub the result from a 32 bit
q-format number.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Add helpers:
* sub64_ssov: subs two 64 bit values and saturates the result.
* subr_h/_ssov: subs two halfwords from two words in q-format with rounding
/ and saturates each result independetly.
Add microcode generator:
* gen_sub64_d: adds two 64 bit values.
* gen_msub_h/s_h: multiply four halfwords, sub each result left justfied
from two word values / and saturate each result.
* gen_msubm_h/s_h: multiply four halfwords, sub each result left justfied
from two words values in q-format / and saturate each
result.
* gen_msubr32/64_h/s_h: multiply four halfwords, sub each result left
justfied from two halftwords/words values in q-format
/ and saturate each result.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Add helpers:
* madd64_q_ssov: multiply two 32 bit q-format number, add them with a
64 bit q-format number and saturate.
* madd32_q_add_ssov: add two 64 bit q-format numbers and return a 32 bit
result.
* maddr_q_ssov: multiplay two 32 bit q-format numbers, add a 32 bit
q-format number and saturate.
* maddr_q: multiplay two 32 bit q-format numbers and add a 32 bit
q-format number.
Note: madd instructions in the q format can behave strange, e.g.
0x1 + (0x80000000 * 0x80000000) << 1 for 32 bit signed values does not cause an
overflow on the guest, because all intermediate results should be handled as if
they are indefinitely precise. We handle this by inverting the overflow bit for
all cases: a + (0x80000000 * 0x80000000) << 1.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add microcode generator function gen_cond_sub.
Add helper functions:
* ixmax/ixmin: search for the max/min value and its related index in a
vector of 16-bit values.
* pack: dack two data registers into an IEEE-754 single precision floating
point format number.
* dvadj: divide-adjust the result after dvstep instructions.
* dvstep: divide a reg by a divisor, producing 8-bits of quotient at a time.
OPCM_32_RRR_FLOAT -> OPCM_32_RRR_DIVIDE
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Fix gen_mtcr using wrong register.
Fix gen_mtcr/mfcr using sign extended offsets.
Fix B format insn using not sign extendend offsets.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Some of the 1.6 ISA instructions were still missing. So let's add them.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of RR opcode format, that have 0x4b as the first opcode.
Add helper functions:
* parity: Calculates the parity bits for every byte of a 32 int.
* bmerge/bsplit: Merges two regs into one bitwise/Splits one reg into two bitwise.
* unpack: unpack a IEEE 754 single precision floating point number as exponent and mantissa.
* dvinit_b_13/131: (ISA v1.3/v1.31)Prepare operands for a divide operation,
where the quotient result is guaranteed to fit into 8 bit.
* dvinit_h_13/131: (ISA v1.3/v1.31)Prepare operands for a divide operation,
where the quotient result is guaranteed to fit into 16 bit.
OPCM_32_RR_FLOAT -> OPCM_32_RR_DIVIDE.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of RR opcode format, that have 0xb as the first opcode.
Add helper functions, for hword and byte arithmetics:
* add_h_ssov/suov: Add two halfword and saturate on overflow.
* sub_h_ssov/suov: Sub two halfword and saturate on overflow.
* absdif_h_ssov: Compute absolute difference for halfwords and saturate on overflow.
* abs_h_ssov/suov: Compute absolute value for two halfwords and saturate on overflow.
* abs_b/h: Compute absolute value for four/two bytes/halfwords
* absdif_b/h: Compute absolute difference for four/two bytes/halfwords
* add_b/h: Add four/two bytes/halfwords.
* sub_b/h: Sub four/two bytes/halfwords.
* eq_b/h: Compare four/two bytes/halfwords with four/two bytes/halfwords on
equality and set all bits of to either one ore zero.
* eqany_b/h: Compare four/two bytes/halfwords with four/two bytes/halfwords on equality.
* lt_b/bu/h/hu: Compare four/two bytes/halfwords with four/two bytes/halfwords
on less than signed and unsigned.
* max_b/bu/h/hu: Calculate max for four/two bytes/halfwords signed and unsigned.
* min_b/bu/h/hu: Calculate min for four/two bytes/halfwords signed and unsigned.
Add helper function abs_ssov, that computes the absolute value for a 32 bit integer and saturates on overflow.
Add microcode generator functions:
* gen_sub_CC: Caluclates sub and sets the carry bit.
* gen_subc_CC: Caluclates sub and carry and sets the carry bit
* gen_abs: Compute absolute value for a 32 bit integer.
* gen_cond_w: Compares two 32 bit values on cond and sets result either zero or all bits one.
OPC2_32_RR_MIN switched with OPC2_32_RR_MIN_U.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of RCR opcode format.
Add helper for madd32/64_ssov and madd32/64_suov.
Add helper for msub32/64_ssov and msub32/64_suov.
Add microcode generator function madd/msub for 32bit and 64bit, which calculate a mul and a add/sub.
OPC2_32_RCR_MSUB_U_32 -> OPC2_32_RCR_MSUB_U_32.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of RLC opcode format.
Add helper psw_write/read.
Add microcode generator gen_mtcr/mfcr, which loads/stores a value to a core special function register, which are defined in csfr.def
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of RC opcode format.
Add helper for mul, sha, absdif with signed saturation on overflow.
Add helper for add, sub, mul with unsigned saturation on overflow.
Add microcode generator functions:
* gen_add_CC, which calculates the carry bit.
* gen_addc_CC, which adds the carry bit to the add and calculates the carry bit.
* gen_absdif, which calculates the absolute difference.
* gen_mul_i64s/u, which mul two 32 bits val into one 64bit reg.
* gen_sh_hi, which shifts two 16bit words in one reg.
* gen_sha_hi, which does a arithmetic shift on two 16bit words.
* gen_sh_cond, which shifts left a reg by one and writes the result of cond into the lsb.
* gen_accumulating_cond, which ands/ors/xors the result of cond of the lsbs
with the lsb of the result.
* gen_eqany_bi/hi, which checks ever byte/hword on equality.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of BOL opcode format.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Add instructions of BO opcode format.
Add microcode generator functions gen_swap, gen_ldmst.
Add microcode generator functions gen_st/ld_preincr, which write back the address after the memory access.
Add helper for circular and bit reverse addr mode calculation.
Add sign extended bitmask for BO_OFF10 field.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Move FCX loading of save_context_ to caller functions, for STLCX, STUCX insn to use those functions.
Move FCX storing of restore_context_ to caller functions, for LDLCX, LDUCX insn to use those functions.
Remove do_raise_exception function, which caused clang to emit a warning.
Fix: save_context_lower now saves a[11] instead of PSW.
Fix: MASK_OP_ABSB_BPOS starting at wrong offset.
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Bastian Koppelmann
Stefan Weil
Alex Zuepke