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-rw-r--r--target/arm/sve_helper.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 8882393..a051854 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4729,6 +4729,94 @@ DO_ZPZ_FP(sve_ucvt_dh, uint64_t, , uint64_to_float16)
DO_ZPZ_FP(sve_ucvt_ds, uint64_t, , uint64_to_float32)
DO_ZPZ_FP(sve_ucvt_dd, uint64_t, , uint64_to_float64)
+static int16_t do_float16_logb_as_int(float16 a, float_status *s)
+{
+ /* Extract frac to the top of the uint32_t. */
+ uint32_t frac = (uint32_t)a << (16 + 6);
+ int16_t exp = extract32(a, 10, 5);
+
+ if (unlikely(exp == 0)) {
+ if (frac != 0) {
+ if (!get_flush_inputs_to_zero(s)) {
+ /* denormal: bias - fractional_zeros */
+ return -15 - clz32(frac);
+ }
+ /* flush to zero */
+ float_raise(float_flag_input_denormal, s);
+ }
+ } else if (unlikely(exp == 0x1f)) {
+ if (frac == 0) {
+ return INT16_MAX; /* infinity */
+ }
+ } else {
+ /* normal: exp - bias */
+ return exp - 15;
+ }
+ /* nan or zero */
+ float_raise(float_flag_invalid, s);
+ return INT16_MIN;
+}
+
+static int32_t do_float32_logb_as_int(float32 a, float_status *s)
+{
+ /* Extract frac to the top of the uint32_t. */
+ uint32_t frac = a << 9;
+ int32_t exp = extract32(a, 23, 8);
+
+ if (unlikely(exp == 0)) {
+ if (frac != 0) {
+ if (!get_flush_inputs_to_zero(s)) {
+ /* denormal: bias - fractional_zeros */
+ return -127 - clz32(frac);
+ }
+ /* flush to zero */
+ float_raise(float_flag_input_denormal, s);
+ }
+ } else if (unlikely(exp == 0xff)) {
+ if (frac == 0) {
+ return INT32_MAX; /* infinity */
+ }
+ } else {
+ /* normal: exp - bias */
+ return exp - 127;
+ }
+ /* nan or zero */
+ float_raise(float_flag_invalid, s);
+ return INT32_MIN;
+}
+
+static int64_t do_float64_logb_as_int(float64 a, float_status *s)
+{
+ /* Extract frac to the top of the uint64_t. */
+ uint64_t frac = a << 12;
+ int64_t exp = extract64(a, 52, 11);
+
+ if (unlikely(exp == 0)) {
+ if (frac != 0) {
+ if (!get_flush_inputs_to_zero(s)) {
+ /* denormal: bias - fractional_zeros */
+ return -1023 - clz64(frac);
+ }
+ /* flush to zero */
+ float_raise(float_flag_input_denormal, s);
+ }
+ } else if (unlikely(exp == 0x7ff)) {
+ if (frac == 0) {
+ return INT64_MAX; /* infinity */
+ }
+ } else {
+ /* normal: exp - bias */
+ return exp - 1023;
+ }
+ /* nan or zero */
+ float_raise(float_flag_invalid, s);
+ return INT64_MIN;
+}
+
+DO_ZPZ_FP(flogb_h, float16, H1_2, do_float16_logb_as_int)
+DO_ZPZ_FP(flogb_s, float32, H1_4, do_float32_logb_as_int)
+DO_ZPZ_FP(flogb_d, float64, , do_float64_logb_as_int)
+
#undef DO_ZPZ_FP
static void do_fmla_zpzzz_h(void *vd, void *vn, void *vm, void *va, void *vg,