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Fixup divider save_restore for floating point too; improve tests (#405)

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- The divider state needs to be saved for __aeabi_ddiv, __aeabi_fdiv, __aeabi_dtan and __aeabi_ftan or they won't work in interrupts *(probably not used much youd hope), or on an RTOS context switch
 - Refactored code out for the integer and floating point cases
 - Improved the floating point 'tests' in passing to check more return values against GCC implementations
 - Added floating point usage to the IRQ nesting test case
This commit is contained in:
Graham Sanderson
2021-05-13 07:38:42 -05:00
committed by GitHub
parent c6c4eeb122
commit 574fdee37b
9 changed files with 501 additions and 158 deletions
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171
test/pico_float_test/pico_float_test.c
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@ -16,7 +16,6 @@
#include <stdlib.h>
#include <math.h>
#include <pico/float.h>
//#include <pico/float.h>
#include "pico/stdlib.h"
#include "inttypes.h"
@ -283,12 +282,58 @@ int test_fcmpun() {
return 0;
}
#define assert_nan(a) assert(isnan(a))
#define check_nan(a) ({ assert_nan(a); a; })
float __aeabi_i2f(int32_t);
float __aeabi_ui2f(int32_t);
float __aeabi_l2f(int64_t);
float __aeabi_ul2f(int64_t);
int32_t __aeabi_f2iz(float);
int64_t __aeabi_f2lz(float);
float __aeabi_fmul(float, float);
float __aeabi_fdiv(float, float);
#if LIB_PICO_FLOAT_PICO
float __real___aeabi_i2f(int);
float __real___aeabi_ui2f(int);
float __real___aeabi_l2f(int64_t);
float __real___aeabi_ul2f(int64_t);
float __real___aeabi_fmul(float, float);
float __real___aeabi_fdiv(float, float);
int32_t __real___aeabi_f2iz(float);
int64_t __real___aeabi_f2lz(float);
float __real_sqrtf(float);
float __real_cosf(float);
float __real_sinf(float);
float __real_tanf(float);
float __real_expf(float);
float __real_logf(float);
float __real_atan2f(float, float);
float __real_powf(float, float);
float __real_truncf(float);
float __real_ldexpf(float, int);
float __real_fmodf(float, float);
#define EPSILON 1e-9
#define assert_close(a, b) assert(((b - a) < EPSILON || (a - b) < EPSILON) || (isinf(a) && isinf(b) && (a < 0) == (b < 0)))
#define check1(func,p0) ({ typeof(p0) r = func(p0), r2 = __CONCAT(__real_, func)(p0); assert(r == r2); r; })
#define check2(func,p0,p1) ({ typeof(p0) r = func(p0,p1), r2 = __CONCAT(__real_, func)(p0,p1); assert(r == r2); r; })
#define check_close1(func,p0) ({ typeof(p0) r = func(p0), r2 = __CONCAT(__real_, func)(p0); if (isnan(p0)) assert_nan(r); else assert_close(r, r2); r; })
#define check_close2(func,p0,p1) ({ typeof(p0) r = func(p0,p1), r2 = __CONCAT(__real_, func)(p0,p1); if (isnan(p0) || isnan(p1)) assert_nan(r); else assert_close(r, r2); r; })
#else
#define check1(func,p0) func(p0)
#define check2(func,p0,p1) func(p0,p1)
#define check_close1(func,p0) func(p0)
#define check_close2(func,p0,p1) func(p0,p1)
#endif
double aa = 0.5;
double bb = 1;
int main() {
setup_default_uart();
bool fail = false;
printf("%d\n", aa < bb);
for(float a = -1; a <= 1; a++) {
for(float b = -1; b <= 1; b++) {
@ -341,21 +386,27 @@ int main() {
#if 1
for (float x = 0; x < 3; x++) {
printf("\n ----- %f\n", x);
printf("FSQRT %10.18f\n", sqrtf(x));
printf("FCOS %10.18f\n", cosf(x));
printf("FSIN %10.18f\n", sinf(x));
printf("FSQRT %10.18f\n", check_close1(sqrtf, x));
printf("FCOS %10.18f\n", check_close1(cosf, x));
printf("FSIN %10.18f\n", check_close1(sinf, x));
float s, c;
sincosf(x, &s, &c);
printf("FSINCOS %10.18f %10.18f\n", s, c);
printf("FTAN %10.18f\n", tanf(x));
printf("FATAN2 %10.18f\n", atan2f(x, 10));
printf("FATAN2 %10.18f\n", atan2f(10, x));
printf("FEXP %10.18f\n", expf(x));
printf("FLN %10.18f\n", logf(x));
printf("POWF %10.18f\n", powf(x, x));
printf("TRUNCF %10.18f\n", truncf(x));
printf("LDEXPF %10.18f\n", ldexpf(x, x));
printf("FMODF %10.18f\n", fmodf(x, 3.0f));
printf("FTAN %10.18f\n", check_close1(tanf, x));
printf("FATAN2 %10.18f\n", check_close2(atan2f, x, 10.f));
printf("FATAN2 %10.18f\n", check_close2(atan2f, 10.f, x));
printf("FEXP %10.18f\n", check_close1(expf, x));
printf("FLN %10.18f\n", check_close1(logf, x));
printf("POWF %10.18f\n", check_close2(powf, x, x));
printf("TRUNCF %10.18f\n", check_close1(truncf, x));
printf("LDEXPF %10.18f\n", check_close2(ldexpf, x, x));
printf("FMODF %10.18f\n", check_close2(fmodf, x, 3.0f));
sincosf(x, &s, &c);
printf("SINCOS %10.18f %10.18f\n", s, c);
if (s != sin(x) || c != cos(x)) {
printf("SINCOS mismatch\n");
fail = true;
}
}
for (double x = 0; x < 3; x++) {
@ -390,18 +441,25 @@ int main() {
// sincosf(x, &s, &c);
printf("FSINCOS %10.18f %10.18f\n", s, c);
for(int i=1; i<4; i++) {
char buf[4];
sprintf(buf, "%d", i);
float f0 = -nanf(buf);
double d0 = -nan(buf);
// hmm
*(uint64_t *)&d0 |= i;
*(uint32_t *)&f0 |= i;
float f = (float)d0;
double d = (double)f0;
printf("f2d %08"PRIx32" -> %g %016"PRIx64"\n", *(uint32_t*)&f0, d, *(uint64_t*)&d);
printf("d2f %016"PRIx64" -> %f %08"PRIx32"\n", *(uint64_t*)&d0, f, *(uint32_t*)&f);
for(int j=0;j<2;j++) {
for (int i = 1; i < 4; i++) {
char buf[4];
sprintf(buf, "%d", i);
float f0 = -nanf(buf);
double d0 = -nan(buf);
// hmm nanf/nan seem to ignore payload
*(uint64_t *) &d0 |= i;
*(uint32_t *) &f0 |= i;
if (j) {
// try without top bit set
*(uint64_t *) &d0 &= ~0x0008000000000000ull;
*(uint32_t *) &f0 &= ~0x00400000u;
}
float f = (float) d0;
double d = (double) f0;
printf("f2d %f %08"PRIx32" -> %g %016"PRIx64"\n", f0, *(uint32_t *) &f0, d, *(uint64_t *) &d);
printf("d2f %f %016"PRIx64" -> %f %08"PRIx32"\n", d0, *(uint64_t *) &d0, f, *(uint32_t *) &f);
}
}
}
#endif
@ -413,17 +471,21 @@ int main() {
// }
for (int32_t x = -1; x; x <<= 1) {
printf("i %d->%f\n", x, (float) x);
check1(__aeabi_i2f, x);
}
for (int32_t x = 1; x; x <<= 1) {
printf("i %d->%f\n", x, (float) x);
check1(__aeabi_i2f, x);
y = x << 1;
}
for (int64_t x = 1; x; x <<= 1) {
printf("i %lld->%f\n", x, (float) x);
check1(__aeabi_l2f, x);
y = x << 1;
}
for (int64_t x = -1; x; x <<= 1) {
printf("i %lld->%f\n", x, (float) x);
check1(__aeabi_l2f, x);
y = x << 1;
}
printf("d %d->%f\n", y, (float) y);
@ -433,40 +495,63 @@ int main() {
uint32_t y;
for(uint32_t x = 1; x; x <<= 1) {
printf("u %u->%f\n", x, (float)x);
check1(__aeabi_ui2f, x);
y = x << 1;
}
printf("u %u->%f\n", y, (float)y);
}
for(int64_t x = 1; x !=0; x <<= 1u) {
printf("%lld->%f\n", x, (float)x);
check1(__aeabi_l2f, x);
}
for(float x = -4294967296.f * 4294967296.f; x>=0.5f; x/=2.f) {
printf("f %f->%lld\n", x, (int64_t)x);
if (x < INT64_MIN) {
// seems like there is a bug in the gcc version!
assert(__aeabi_f2lz(x) == INT64_MIN);
} else {
check1(__aeabi_f2lz, x);
}
}
for(float x = 4294967296.f * 4294967296.f * 2.f; x>=0.5f; x/=2.f) {
printf("f2i64 %f->%lld\n", x, (int64_t)x);
if (x >= INT64_MAX) {
// seems like there is a bug in the gcc version!
assert(__aeabi_f2lz(x) == INT64_MAX);
} else {
check1(__aeabi_f2lz, x);
}
}
for(float x = -4294967296.f * 4294967296.f; x<=-0.5f; x/=2.f) {
printf("d2i32 %f->%d\n", x, (int32_t)x);
check1(__aeabi_f2iz, x);
}
for(float x = 4294967296.f * 4294967296.f; x>=0.5f; x/=2.f) {
printf("f %f->%lld\n", x, (int64_t)x);
printf("d2i32 %f->%d\n", x, (int32_t)x);
check1(__aeabi_f2iz, x);
}
for (double x = 1; x < 11; x += 2) {
double f = x * x;
double g = 1.0 / x;
printf("%g %10.18g %10.18g, %10.18g, %10.18g %10.18g\n", x, f, x + 0.37777777777777777777777777777,
x - 0.377777777777777777777777777777, g, 123456789.0 / x);
for (float x = 1; x < 11; x += 2) {
float f = x * x;
float g = 1.0f / x;
printf("%g %10.18g %10.18g, %10.18g, %10.18g %10.18g\n", x, f, x + 0.37777777777777777777777777777f,
x - 0.377777777777777777777777777777f, g, 123456789.0f / x);
check2(__aeabi_fmul, x, x);
check2(__aeabi_fdiv, 1.0f, x);
}
if (test_cfcmpeq() || test_cfcmple() ||
test_fcmpun() || test_cmple_gt() || test_cmplt_ge()) {
if (fail ||
test_cfcmpeq() ||
test_cfcmple() ||
test_fcmpun() ||
test_cmple_gt() ||
test_cmplt_ge()) {
printf("FAILED\n");
return 1;
} else {
printf("PASSED\n");
return 0;
}
if (test_cfcmpeq() || test_cfcmple() ||
test_fcmpun() || test_cmple_gt() || test_cmplt_ge()) {
printf("FAILED\n");
return 1;
} else {
printf("PASSED\n");
return 0;
}
#endif
}