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15 Commity (08c661c930a8d6256e3065064820fa30d5485d39)

Autor SHA1 Wiadomość Data
Damien George bf3585b33c py/asmxtensa: Fix use of l32i/s32i when offset won't fit in encoding. 
This commit adds optimised l32i/s32i functions that select the best load/
store encoding based on the size of the offset, and uses the function when
necessary in code generation.

Without this, ASM_LOAD_REG_REG_OFFSET() could overflow the word offset
(using a narrow encoding), for example when loading the prelude from the
constant table when there are many (>16) constants.

Fixes issue #8458.

Signed-off-by: Damien George <damien@micropython.org>
 2022-03-30 16:32:17 +11:00
Damien George 69661f3343 all: Reformat C and Python source code with tools/codeformat.py. 
This is run with uncrustify 0.70.1, and black 19.10b0.
 2020-02-28 10:33:03 +11:00
Damien George 9adedce42e py: Add new Xtensa-Windowed arch for native emitter. 
Enabled via the configuration MICROPY_EMIT_XTENSAWIN.
 2019-10-05 13:44:53 +10:00
Damien George f7ddc94166 py/asmxtensa: Add support for Xtensa with windowed registers. 
Window-specific asm emit functions are added, along with a new macro option
GENERIC_ASM_API_WIN.
 2019-10-05 13:44:08 +10:00
Damien George 1396a026be py: Add support to save native, viper and asm code to .mpy files. 
This commit adds support for saving and loading .mpy files that contain
native code (native, viper and inline-asm).  A lot of the ground work was
already done for this in the form of removing pointers from generated
native code.  The changes here are mainly to link in qstr values to the
native code, and change the format of .mpy files to contain native code
blocks (possibly mixed with bytecode).

A top-level summary:

- @micropython.native, @micropython.viper and @micropython.asm_thumb/
  asm_xtensa are now allowed in .py files when compiling to .mpy, and they
  work transparently to the user.

- Entire .py files can be compiled to native via mpy-cross -X emit=native
  and for the most part the generated .mpy files should work the same as
  their bytecode version.

- The .mpy file format is changed to 1) specify in the header if the file
  contains native code and if so the architecture (eg x86, ARMV7M, Xtensa);
  2) for each function block the kind of code is specified (bytecode,
  native, viper, asm).

- When native code is loaded from a .mpy file the native code must be
  modified (in place) to link qstr values in, just like bytecode (see
  py/persistentcode.c:arch_link_qstr() function).

In addition, this now defines a public, native ABI for dynamically loadable
native code generated by other languages, like C.
 2019-03-08 15:53:05 +11:00
Damien George 006671056d py/emitnative: Load native fun table ptr from const table for all archs. 
All architectures now have a dedicated register to hold the pointer to the
native function table mp_fun_table, and so they all need to load this
register at the start of the native function.  This commit makes the
loading of this register uniform across architectures by passing the
pointer in the constant table for the native function, and then loading the
register from the constant table.  Doing it this way means that the pointer
is not stored in the assembly code, helping to make the code more portable.
 2018-10-13 15:16:33 +11:00
Damien George 4fc437f1ef py/asmxtensa: Use proper calculation for const table offset. 
Instead of hard-coding it to 4 bytes.  This allows for there to be other
data stored at the very start of the emitted native code.
 2018-10-01 12:34:58 +10:00
Damien George 30a45360e7 py/asmxtensa: Make indirect calls using func table, not raw pointers. 
Loading a pointer by indexing into the native function table mp_fun_table,
rather than loading an immediate value (via a PC-relative load), uses less
code space.
 2018-09-16 00:43:24 +10:00
Damien George 794c32102e py/asmxtensa: Use narrow version of add instr to reduce native code size 2018-08-17 14:53:58 +10:00
Damien George 1ad44acb15 py/asmxtensa: Optimise loading local addr and support larger offsets. 2018-08-17 14:11:37 +10:00
Damien George 2964b41c28 py/asm*: Support assembling code to jump to a register, and get PC+off. 
Useful for position independent code, and implementing state machines.
 2018-08-16 13:45:24 +10:00
Damien George f7d6108d1a py/asmxtensa: Handle function entry/exit when stack use larger than 127. 2018-08-16 13:43:36 +10:00
Damien George 155fdc74d5 py/asm: Remove need for dummy_data when doing initial assembler passes. 
For all but the last pass the assembler only needs to count how much space
is needed for the machine code, it doesn't actually need to emit anything.
The dummy_data just uses unnecessary RAM and without it the code is not
any more complex (and code size does not increase for Thumb and Xtensa
archs).
 2016-12-09 22:50:58 +11:00
Damien George f76b1bfa9f py: Add inline Xtensa assembler. 
This patch adds the MICROPY_EMIT_INLINE_XTENSA option, which, when
enabled, allows the @micropython.asm_xtensa decorator to be used.

The following opcodes are currently supported (ax is a register, a0-a15):

    ret_n()
    callx0(ax)
    j(label)
    jx(ax)

    beqz(ax, label)
    bnez(ax, label)
    mov(ax, ay)
    movi(ax, imm) # imm can be full 32-bit, uses l32r if needed

    and_(ax, ay, az)
    or_(ax, ay, az)
    xor(ax, ay, az)
    add(ax, ay, az)
    sub(ax, ay, az)
    mull(ax, ay, az)

    l8ui(ax, ay, imm)
    l16ui(ax, ay, imm)
    l32i(ax, ay, imm)
    s8i(ax, ay, imm)
    s16i(ax, ay, imm)
    s32i(ax, ay, imm)
    l16si(ax, ay, imm)
    addi(ax, ay, imm)

    ball(ax, ay, label)
    bany(ax, ay, label)
    bbc(ax, ay, label)
    bbs(ax, ay, label)
    beq(ax, ay, label)
    bge(ax, ay, label)
    bgeu(ax, ay, label)
    blt(ax, ay, label)
    bnall(ax, ay, label)
    bne(ax, ay, label)
    bnone(ax, ay, label)

Upon entry to the assembly function the registers a0, a12, a13, a14 are
pushed to the stack and the stack pointer (a1) decreased by 16.  Upon
exit, these registers and the stack pointer are restored, and ret.n is
executed to return to the caller (caller address is in a0).

Note that the ABI for the Xtensa emitters is non-windowing.
 2016-12-09 17:07:38 +11:00
Damien George fcac4b07f1 py/asmxtensa: Add low-level Xtensa assembler. 2016-12-09 16:51:49 +11:00