94dc73b7f1
[xcc,opcodes,pk,sim] cleanup to FP ISA
- Added 5th rounding mode
- Removed MFCR/MTCR in favor of MFFSR/MTFSR (it was the only CR...)
- merged MTF.D with MTFLH.D; operation depends on RV32/RV64 mode
- made MFFL.D and MFFH.D illegal in RV64
16 years ago
ada2fe414b
[sim] added nearest/ties to max magnitude rounding mode
16 years ago
dc1aa62411
[sim] changed divide-by-0 semantics
now it always gives -1, no matter the signedness.
16 years ago
76ee8711f8
[sim,opcodes] add mulhsu instruction
16 years ago
5bae2bf372
[opcodes,pk,sim,xcc] great renumbering of 2011, part deux
16 years ago
f0063c2e8b
[sim, pk, xcc, opcodes] great instruction renaming of 2011
16 years ago
21ce327f5d
[opcodes, sim, xcc] made *w insns illegal in RV32
now generic variants behave differently in RV32 and RV64.
16 years ago
5ddec097b8
[opcodes, pk, sim, xcc] removed nor, normalized macros to addi
16 years ago
db6af47aa9
[sim] fix jalr bug
16 years ago
1313050769
[opcodes,pk,sim,xcc] flip fields to favor little endian
16 years ago
0ea058a5a8
[sim] fixed some compiler warnings
16 years ago
53e36319bc
[sim] cleaned up handling of link register
16 years ago
3ebbeba6d5
[sim] handle integer division overflow
Behavior is now same as GCC's optimizer. Previously, we just crashed :)
16 years ago
259d20a35d
[opcodes, pk, sim, xcc] Tweaked FP encoding
16 years ago
6d443095f9
[opcodes] generate latex and verilog correctly
16 years ago
e59cf7ebfe
[pk] various PK cleanups/speedups
16 years ago
7471eee0ba
[xcc, sim, pk, opcodes] new instruction encoding!
16 years ago
3f144b12ed
[xcc, sim, pk] link register is now x1
16 years ago
68f81d8f48
[opcodes, pk, sim, xcc] made jumps shorter and PC-relative
16 years ago
63844a7558
[sim] removed unnecessary trap in mfcr instruction
16 years ago
5f0b1c3e7b
[sim,xcc] fixed minor bugs related to tp/cr29
16 years ago
78bc7d9885
[pk,sim,xcc] get rid of at register, introduce tp register
16 years ago
2c9a832352
[sim,xcc,pk,opcodes] static rounding modes for FP insns
Now, you can either use the RM in the FSR or specify it in the insn.
(Except for FP->int; no dynamic for that.)
16 years ago
8456c1e923
[pk, sim] added FPU emulation support to proxy kernel
16 years ago
ab928baadb
[sim] made softfloat files C instead of C++
16 years ago
d3cb781e16
[sim] added writeback tracing
16 years ago
9222fb8ab8
[xcc] modified opcodes for better FP decode mapping
16 years ago
9817b7be3d
[opcodes] added code field back to syscall/break
16 years ago
2d58d46c89
[xcc] removed CEXC field from FSR
16 years ago
a359d7b81a
[xcc,sim] eliminated vectored traps
now, the evec register holds the address that all traps vector to,
and the cause register is set with the trap number.
16 years ago
fcdd030cbe
[sim, xcc] changed cvt/trunc to use GPRs for int args
this way, we don't have to futz with storing integers in recoded
floating-point registers. too bad we lose some decoupling.
16 years ago
04fa9f8603
[xcc, sim] mff now uses rs2 for data
this is symmetric with fp stores, so we only need one decoding pipe
16 years ago
68ddbd26c3
[opcodes, sim, xcc] added mffl.d instruction
...to be used instead of mff.s when doing int -> DP FP moves on a 32-bit cpu
16 years ago
ee7cb7243e
[xcc, sim] eliminated zero-extended immediates
This is a big commit because it involved rewriting gcc's algorithm for
generating constants.
16 years ago
c28cb729f9
[sim] fixed bug in which shift operands were reversed
16 years ago
cbefaf68c7
[xcc, sim] changed instruction format so imm12 subs for rs2
16 years ago
1583b7a9e2
[xcc, sim] replaced ble/bleu with bge/bgeu
This will simplify control logic (since every branch has a logical inverse)
16 years ago
19b59dd9a0
[sim] renamed sllv to sll (same for other shifts)
16 years ago
86ab285710
[xcc, sim] moved shamt field and renamed shifts
16 years ago
ab2da3ad68
[xcc, sim] branches now are next-PC-based, not PC-based
16 years ago
8edc1451b2
[xcc] fixed broken 32-bit FP ABI
16 years ago
9bd1c58531
[sim, xcc] Added mffh.d/mtflh.d; fixed FP ABI for 32-bit
16 years ago
b3dac377a1
[sim, pk] cleaned up exception vectors and FP exc flags
16 years ago
5b9b36def0
[opcodes,xcc,sim] mffh.d,mtfh.d added (broken commit)
16 years ago
05b409f48d
[opcodes,sim,xcc] move opcodes for 3 source instructions
16 years ago
a71855cfd6
Revert "[xcc, sim] added slei/sleui in lieu of slti/sltiu"
This reverts commit bf5406d4df625678bc6ec20ce1d48541541dba54.
We found a clever way to efficiently implement slti/sltiu despite the
reversed operands. The trick is because of the following fact:
(a < b) === !(b <= a) === !(b-1 < a)
So just turn off the carry-in when doing the subtraction for the comparison.
16 years ago
5c88aa157b
Merge branch 'master' of /project/eecs/parlab/git/projects/riscv
Conflicts:
sim/riscv/insns/mtpcr.h
sim/riscv/processor.cc
16 years ago
64ec648761
[pk, sim] added interrupt support to sim; added timer interrupt
16 years ago
a9176ab510
[sim] add while to interactive_until
16 years ago
9beab4ff43
[sim] change applink for tohost/fromhost (forgot one file)
16 years ago
Andrew Waterman
Yunsup Lee
Andrew Waterman