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py/emitinlinethumb: Make float instruction use dynamically selectable.

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This allows mpy-cross to dynamically select whether ARMv7-M float
instructions are supported in @micropython.asm_thumb functions.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2022-05-26 12:22:07 +10:00
parent cca08922d9
commit 4290d51320
2 changed files with 19 additions and 10 deletions
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1
mpy-cross/mpconfigport.h
View File

@ -42,7 +42,6 @@
#define MICROPY_EMIT_X86 (1)
#define MICROPY_EMIT_THUMB (1)
#define MICROPY_EMIT_INLINE_THUMB (1)
#define MICROPY_EMIT_INLINE_THUMB_FLOAT (1)
#define MICROPY_EMIT_ARM (1)
#define MICROPY_EMIT_XTENSA (1)
#define MICROPY_EMIT_INLINE_XTENSA (1)

28
py/emitinlinethumb.c
View File

@ -59,6 +59,21 @@ struct _emit_inline_asm_t {
qstr *label_lookup;
};
#if MICROPY_DYNAMIC_COMPILER
static inline bool emit_inline_thumb_allow_float(emit_inline_asm_t *emit) {
return MP_NATIVE_ARCH_ARMV7EMSP <= mp_dynamic_compiler.native_arch
&& mp_dynamic_compiler.native_arch <= MP_NATIVE_ARCH_ARMV7EMDP;
}
#else
static inline bool emit_inline_thumb_allow_float(emit_inline_asm_t *emit) {
return MICROPY_EMIT_INLINE_THUMB_FLOAT;
}
#endif
STATIC void emit_inline_thumb_error_msg(emit_inline_asm_t *emit, mp_rom_error_text_t msg) {
*emit->error_slot = mp_obj_new_exception_msg(&mp_type_SyntaxError, msg);
}
@ -216,7 +231,6 @@ STATIC mp_uint_t get_arg_special_reg(emit_inline_asm_t *emit, const char *op, mp
return 0;
}
#if MICROPY_EMIT_INLINE_THUMB_FLOAT
STATIC mp_uint_t get_arg_vfpreg(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) {
const char *reg_str = get_arg_str(pn);
if (reg_str[0] == 's' && reg_str[1] != '\0') {
@ -243,7 +257,6 @@ malformed:
MP_ERROR_TEXT("'%s' expects an FPU register"), op));
return 0;
}
#endif
STATIC mp_uint_t get_arg_reglist(emit_inline_asm_t *emit, const char *op, mp_parse_node_t pn) {
// a register list looks like {r0, r1, r2} and is parsed as a Python set
@ -409,10 +422,10 @@ STATIC const format_9_10_op_t format_9_10_op_table[] = {
};
#undef X
#if MICROPY_EMIT_INLINE_THUMB_FLOAT
// actual opcodes are: 0xee00 | op.hi_nibble, 0x0a00 | op.lo_nibble
typedef struct _format_vfp_op_t { byte op;
char name[3];
typedef struct _format_vfp_op_t {
byte op;
char name[3];
} format_vfp_op_t;
STATIC const format_vfp_op_t format_vfp_op_table[] = {
{ 0x30, "add" },
@ -420,7 +433,6 @@ STATIC const format_vfp_op_t format_vfp_op_table[] = {
{ 0x20, "mul" },
{ 0x80, "div" },
};
#endif
// shorthand alias for whether we allow ARMv7-M instructions
#define ARMV7M asm_thumb_allow_armv7m(&emit->as)
@ -439,8 +451,7 @@ STATIC void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, mp_uint_t n_a
size_t op_len;
const char *op_str = (const char *)qstr_data(op, &op_len);
#if MICROPY_EMIT_INLINE_THUMB_FLOAT
if (op_str[0] == 'v') {
if (emit_inline_thumb_allow_float(emit) && op_str[0] == 'v') {
// floating point operations
if (n_args == 2) {
mp_uint_t op_code = 0x0ac0, op_code_hi;
@ -535,7 +546,6 @@ STATIC void emit_inline_thumb_op(emit_inline_asm_t *emit, qstr op, mp_uint_t n_a
}
return;
}
#endif
if (n_args == 0) {
if (op == MP_QSTR_nop) {