kopia lustrzana https://github.com/micropython/micropython
py/nlrxtensa: Convert from assembler to C file with inline asm.
nlr_jump is a little bit inefficient because it now saves a register to the stack.pull/2923/head
Damien George
rodzic
be3d7f91e5
commit
a85755aa22
119
py/nlrxtensa.S
119
py/nlrxtensa.S
|
|
@ -1,119 +0,0 @@
|
|||
/*
|
||||
* This file is part of the Micro Python project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) 2014 Damien P. George
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#if defined(__xtensa__)
|
||||
|
||||
/*
|
||||
calling conventions:
|
||||
a0 = return address
|
||||
a1 = stack pointer
|
||||
a2 = first arg, return value
|
||||
a3-a7 = rest of args
|
||||
*/
|
||||
|
||||
// the offset of nlr_top within mp_state_ctx_t
|
||||
#define NLR_TOP_OFFSET (2 * 4)
|
||||
|
||||
#define NLR_TOP (mp_state_ctx + NLR_TOP_OFFSET)
|
||||
|
||||
.file "nlr.s"
|
||||
.text
|
||||
|
||||
.literal_position
|
||||
.literal .LC0, NLR_TOP
|
||||
.align 4
|
||||
.global nlr_push
|
||||
.type nlr_push, @function
|
||||
nlr_push:
|
||||
// save regs
|
||||
s32i.n a0, a2, 8
|
||||
s32i.n a1, a2, 12
|
||||
s32i.n a8, a2, 16
|
||||
s32i.n a9, a2, 20
|
||||
s32i.n a10, a2, 24
|
||||
s32i.n a11, a2, 28
|
||||
s32i.n a12, a2, 32
|
||||
s32i.n a13, a2, 36
|
||||
s32i.n a14, a2, 40
|
||||
s32i.n a15, a2, 44
|
||||
|
||||
l32r a3, .LC0
|
||||
l32i.n a4, a3, 0
|
||||
s32i.n a2, a3, 0
|
||||
s32i.n a4, a2, 0
|
||||
movi.n a2, 0
|
||||
ret.n
|
||||
.size nlr_push, .-nlr_push
|
||||
|
||||
.literal_position
|
||||
.literal .LC1, NLR_TOP
|
||||
.align 4
|
||||
.global nlr_pop
|
||||
.type nlr_pop, @function
|
||||
nlr_pop:
|
||||
l32r a2, .LC1
|
||||
l32i.n a3, a2, 0
|
||||
l32i.n a3, a3, 0
|
||||
s32i.n a3, a2, 0
|
||||
ret.n
|
||||
.size nlr_pop, .-nlr_pop
|
||||
|
||||
.literal_position
|
||||
.literal .LC2, NLR_TOP
|
||||
.align 4
|
||||
.global nlr_jump
|
||||
.type nlr_jump, @function
|
||||
nlr_jump:
|
||||
l32r a3, .LC2
|
||||
l32i.n a3, a3, 0 // a3 = nlr_top
|
||||
bnez.n a3, .L4
|
||||
call0 nlr_jump_fail
|
||||
.L4:
|
||||
s32i.n a2, a3, 4 // nlr_top->ret_val = val
|
||||
|
||||
// restore regs
|
||||
l32i.n a0, a3, 8
|
||||
l32i.n a1, a3, 12
|
||||
l32i.n a8, a3, 16
|
||||
l32i.n a9, a3, 20
|
||||
l32i.n a10, a3, 24
|
||||
l32i.n a11, a3, 28
|
||||
l32i.n a12, a3, 32
|
||||
l32i.n a13, a3, 36
|
||||
l32i.n a14, a3, 40
|
||||
l32i.n a15, a3, 44
|
||||
|
||||
l32i.n a3, a3, 0 // a3 = nlr_top->prev
|
||||
l32r a2, .LC2
|
||||
s32i.n a3, a2, 0 // nlr_top = a3
|
||||
movi.n a2, 1 // return 1
|
||||
ret.n
|
||||
.size nlr_jump, .-nlr_jump
|
||||
|
||||
#endif // defined(__xtensa__)
|
||||
#if defined(linux)
|
||||
.section .note.GNU-stack,"",%progbits
|
||||
#endif
|
||||
|
|
@ -0,0 +1,103 @@
|
|||
/*
|
||||
* This file is part of the MicroPython project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) 2014-2017 Damien P. George
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include "py/mpstate.h"
|
||||
#include "py/nlr.h"
|
||||
|
||||
#if !MICROPY_NLR_SETJMP && defined(__xtensa__)
|
||||
|
||||
#undef nlr_push
|
||||
|
||||
// Xtensa calling conventions:
|
||||
// a0 = return address
|
||||
// a1 = stack pointer
|
||||
// a2 = first arg, return value
|
||||
// a3-a7 = rest of args
|
||||
|
||||
unsigned int nlr_push(nlr_buf_t *nlr) {
|
||||
|
||||
__asm volatile (
|
||||
"s32i.n a0, a2, 8 \n" // save regs...
|
||||
"s32i.n a1, a2, 12 \n"
|
||||
"s32i.n a8, a2, 16 \n"
|
||||
"s32i.n a9, a2, 20 \n"
|
||||
"s32i.n a10, a2, 24 \n"
|
||||
"s32i.n a11, a2, 28 \n"
|
||||
"s32i.n a12, a2, 32 \n"
|
||||
"s32i.n a13, a2, 36 \n"
|
||||
"s32i.n a14, a2, 40 \n"
|
||||
"s32i.n a15, a2, 44 \n"
|
||||
"j nlr_push_tail \n" // do the rest in C
|
||||
);
|
||||
|
||||
return 0; // needed to silence compiler warning
|
||||
}
|
||||
|
||||
__attribute__((used)) unsigned int nlr_push_tail(nlr_buf_t *nlr) {
|
||||
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
||||
nlr->prev = *top;
|
||||
*top = nlr;
|
||||
return 0; // normal return
|
||||
}
|
||||
|
||||
void nlr_pop(void) {
|
||||
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
|
||||
*top = (*top)->prev;
|
||||
}
|
||||
|
||||
NORETURN void nlr_jump(void *val) {
|
||||
nlr_buf_t **top_ptr = &MP_STATE_THREAD(nlr_top);
|
||||
nlr_buf_t *top = *top_ptr;
|
||||
if (top == NULL) {
|
||||
nlr_jump_fail(val);
|
||||
}
|
||||
|
||||
top->ret_val = val;
|
||||
*top_ptr = top->prev;
|
||||
|
||||
__asm volatile (
|
||||
"mov.n a2, %0 \n" // a2 points to nlr_buf
|
||||
"l32i.n a0, a2, 8 \n" // restore regs...
|
||||
"l32i.n a1, a2, 12 \n"
|
||||
"l32i.n a8, a2, 16 \n"
|
||||
"l32i.n a9, a2, 20 \n"
|
||||
"l32i.n a10, a2, 24 \n"
|
||||
"l32i.n a11, a2, 28 \n"
|
||||
"l32i.n a12, a2, 32 \n"
|
||||
"l32i.n a13, a2, 36 \n"
|
||||
"l32i.n a14, a2, 40 \n"
|
||||
"l32i.n a15, a2, 44 \n"
|
||||
"movi.n a2, 1 \n" // return 1, non-local return
|
||||
"ret.n \n" // return
|
||||
: // output operands
|
||||
: "r"(top) // input operands
|
||||
: // clobbered registers
|
||||
);
|
||||
|
||||
for (;;); // needed to silence compiler warning
|
||||
}
|
||||
|
||||
#endif // !MICROPY_NLR_SETJMP && defined(__xtensa__)
|
||||
Ładowanie…
Reference in New Issue