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py and libm: Add asinf,acosf; print higher precision for float.

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Also use less stack space when printing single precision float.

Addition of asinf and acosf addresses issue #851.
This commit is contained in:
Damien George
2014-09-11 22:24:45 +01:00
parent 953074315e
commit 20beff9ae3
5 changed files with 148 additions and 13 deletions
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10
py/objfloat.c
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@@ -48,18 +48,18 @@
STATIC void float_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_float_t *o = o_in;
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
char buf[32];
format_float(o->value, buf, sizeof(buf), 'g', 6, '\0');
char buf[16];
format_float(o->value, buf, sizeof(buf), 'g', 7, '\0');
print(env, "%s", buf);
if (strchr(buf, '.') == NULL) {
if (strchr(buf, '.') == NULL && strchr(buf, 'e') == NULL) {
// Python floats always have decimal point
print(env, ".0");
}
#else
char buf[32];
sprintf(buf, "%.17g", (double) o->value);
sprintf(buf, "%.16g", (double) o->value);
print(env, buf);
if (strchr(buf, '.') == NULL) {
if (strchr(buf, '.') == NULL && strchr(buf, 'e') == NULL) {
// Python floats always have decimal point
print(env, ".0");
}