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py: Integrate Xtensa assembler into native emitter.

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The config option MICROPY_EMIT_XTENSA can now be enabled to target the
Xtensa architecture with @micropython.native and @micropython.viper
decorators.
This commit is contained in:
Damien George 2016-12-09 16:39:39 +11:00
parent fcac4b07f1
commit 8e5aced1fd
6 changed files with 42 additions and 4 deletions
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2
py/compile.c
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@ -79,6 +79,8 @@ typedef enum {
#define NATIVE_EMITTER(f) emit_native_thumb_##f
#elif MICROPY_EMIT_ARM
#define NATIVE_EMITTER(f) emit_native_arm_##f
#elif MICROPY_EMIT_XTENSA
#define NATIVE_EMITTER(f) emit_native_xtensa_##f
#else
#error "unknown native emitter"
#endif

3
py/emit.h
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@ -154,6 +154,7 @@ extern const emit_method_table_t emit_native_x64_method_table;
extern const emit_method_table_t emit_native_x86_method_table;
extern const emit_method_table_t emit_native_thumb_method_table;
extern const emit_method_table_t emit_native_arm_method_table;
extern const emit_method_table_t emit_native_xtensa_method_table;
extern const mp_emit_method_table_id_ops_t mp_emit_bc_method_table_load_id_ops;
extern const mp_emit_method_table_id_ops_t mp_emit_bc_method_table_store_id_ops;
@ -164,6 +165,7 @@ emit_t *emit_native_x64_new(mp_obj_t *error_slot, mp_uint_t max_num_labels);
emit_t *emit_native_x86_new(mp_obj_t *error_slot, mp_uint_t max_num_labels);
emit_t *emit_native_thumb_new(mp_obj_t *error_slot, mp_uint_t max_num_labels);
emit_t *emit_native_arm_new(mp_obj_t *error_slot, mp_uint_t max_num_labels);
emit_t *emit_native_xtensa_new(mp_obj_t *error_slot, mp_uint_t max_num_labels);
void emit_bc_set_max_num_labels(emit_t* emit, mp_uint_t max_num_labels);
@ -172,6 +174,7 @@ void emit_native_x64_free(emit_t *emit);
void emit_native_x86_free(emit_t *emit);
void emit_native_thumb_free(emit_t *emit);
void emit_native_arm_free(emit_t *emit);
void emit_native_xtensa_free(emit_t *emit);
void mp_emit_bc_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope);
void mp_emit_bc_end_pass(emit_t *emit);

24
py/emitnative.c
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@ -61,7 +61,8 @@
#if (MICROPY_EMIT_X64 && N_X64) \
|| (MICROPY_EMIT_X86 && N_X86) \
|| (MICROPY_EMIT_THUMB && N_THUMB) \
|| (MICROPY_EMIT_ARM && N_ARM)
|| (MICROPY_EMIT_ARM && N_ARM) \
|| (MICROPY_EMIT_XTENSA && N_XTENSA) \
// this is defined so that the assembler exports generic assembler API macros
#define GENERIC_ASM_API (1)
@ -139,6 +140,12 @@ STATIC byte mp_f_n_args[MP_F_NUMBER_OF] = {
#include "py/asmarm.h"
#define EXPORT_FUN(name) emit_native_arm_##name
#elif N_XTENSA
// Xtensa specific stuff
#include "py/asmxtensa.h"
#define EXPORT_FUN(name) emit_native_xtensa_##name
#else
#error unknown native emitter
@ -1965,6 +1972,21 @@ STATIC void emit_native_binary_op(emit_t *emit, mp_binary_op_t op) {
ASM_ARM_CC_NE,
};
asm_arm_setcc_reg(emit->as, REG_RET, ccs[op - MP_BINARY_OP_LESS]);
#elif N_XTENSA
static uint8_t ccs[6] = {
ASM_XTENSA_CC_LT,
0x80 | ASM_XTENSA_CC_LT, // for GT we'll swap args
ASM_XTENSA_CC_EQ,
0x80 | ASM_XTENSA_CC_GE, // for LE we'll swap args
ASM_XTENSA_CC_GE,
ASM_XTENSA_CC_NE,
};
uint8_t cc = ccs[op - MP_BINARY_OP_LESS];
if ((cc & 0x80) == 0) {
asm_xtensa_setcc_reg_reg_reg(emit->as, cc, REG_RET, REG_ARG_2, reg_rhs);
} else {
asm_xtensa_setcc_reg_reg_reg(emit->as, cc & ~0x80, REG_RET, reg_rhs, REG_ARG_2);
}
#else
#error not implemented
#endif

2
py/mkrules.mk
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@ -49,7 +49,7 @@ $(BUILD)/%.o: %.c
# List all native flags since the current build system doesn't have
# the micropython configuration available. However, these flags are
# needed to extract all qstrings
QSTR_GEN_EXTRA_CFLAGS += -DNO_QSTR -DN_X64 -DN_X86 -DN_THUMB -DN_ARM
QSTR_GEN_EXTRA_CFLAGS += -DNO_QSTR -DN_X64 -DN_X86 -DN_THUMB -DN_ARM -DN_XTENSA
QSTR_GEN_EXTRA_CFLAGS += -I$(BUILD)/tmp
vpath %.c . $(TOP)

7
py/mpconfig.h
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@ -288,8 +288,13 @@
#define MICROPY_EMIT_ARM (0)
#endif
// Whether to emit Xtensa native code
#ifndef MICROPY_EMIT_XTENSA
#define MICROPY_EMIT_XTENSA (0)
#endif
// Convenience definition for whether any native emitter is enabled
#define MICROPY_EMIT_NATIVE (MICROPY_EMIT_X64 || MICROPY_EMIT_X86 || MICROPY_EMIT_THUMB || MICROPY_EMIT_ARM)
#define MICROPY_EMIT_NATIVE (MICROPY_EMIT_X64 || MICROPY_EMIT_X86 || MICROPY_EMIT_THUMB || MICROPY_EMIT_ARM || MICROPY_EMIT_XTENSA)
/*****************************************************************************/
/* Compiler configuration */

8
py/py.mk
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@ -130,6 +130,8 @@ PY_O_BASENAME = \
emitinlinethumb.o \
asmarm.o \
emitnarm.o \
asmxtensa.o \
emitnxtensa.o \
formatfloat.o \
parsenumbase.o \
parsenum.o \
@ -250,7 +252,7 @@ PY_O += $(BUILD)/$(BUILD)/frozen_mpy.o
endif
# Sources that may contain qstrings
SRC_QSTR_IGNORE = nlr% emitnx% emitnthumb% emitnarm%
SRC_QSTR_IGNORE = nlr% emitnx86% emitnx64% emitnthumb% emitnarm% emitnxtensa%
SRC_QSTR = $(SRC_MOD) $(addprefix py/,$(filter-out $(SRC_QSTR_IGNORE),$(PY_O_BASENAME:.o=.c)) emitnative.c)
# Anything that depends on FORCE will be considered out-of-date
@ -292,6 +294,10 @@ $(PY_BUILD)/emitnarm.o: CFLAGS += -DN_ARM
$(PY_BUILD)/emitnarm.o: py/emitnative.c
$(call compile_c)
$(PY_BUILD)/emitnxtensa.o: CFLAGS += -DN_XTENSA
$(PY_BUILD)/emitnxtensa.o: py/emitnative.c
$(call compile_c)
# optimising gc for speed; 5ms down to 4ms on pybv2
$(PY_BUILD)/gc.o: CFLAGS += $(CSUPEROPT)