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-rw-r--r--fpu/softfloat.c174
1 files changed, 101 insertions, 73 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index a6dbb1d..8002553 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -2037,83 +2037,105 @@ float128_div(float128 a, float128 b, float_status *status)
* conversion is performed according to the IEC/IEEE Standard for
* Binary Floating-Point Arithmetic.
*
- * The float_to_float helper only needs to take care of raising
- * invalid exceptions and handling the conversion on NaNs.
+ * Usually this only needs to take care of raising invalid exceptions
+ * and handling the conversion on NaNs.
*/
-static FloatParts64 float_to_float(FloatParts64 a, const FloatFmt *dstf,
- float_status *s)
+static void parts_float_to_ahp(FloatParts64 *a, float_status *s)
{
- if (dstf->arm_althp) {
- switch (a.cls) {
- case float_class_qnan:
- case float_class_snan:
- /* There is no NaN in the destination format. Raise Invalid
- * and return a zero with the sign of the input NaN.
- */
- float_raise(float_flag_invalid, s);
- a.cls = float_class_zero;
- a.frac = 0;
- a.exp = 0;
- break;
+ switch (a->cls) {
+ case float_class_qnan:
+ case float_class_snan:
+ /*
+ * There is no NaN in the destination format. Raise Invalid
+ * and return a zero with the sign of the input NaN.
+ */
+ float_raise(float_flag_invalid, s);
+ a->cls = float_class_zero;
+ break;
- case float_class_inf:
- /* There is no Inf in the destination format. Raise Invalid
- * and return the maximum normal with the correct sign.
- */
- float_raise(float_flag_invalid, s);
- a.cls = float_class_normal;
- a.exp = dstf->exp_max;
- a.frac = ((1ull << dstf->frac_size) - 1) << dstf->frac_shift;
- break;
+ case float_class_inf:
+ /*
+ * There is no Inf in the destination format. Raise Invalid
+ * and return the maximum normal with the correct sign.
+ */
+ float_raise(float_flag_invalid, s);
+ a->cls = float_class_normal;
+ a->exp = float16_params_ahp.exp_max;
+ a->frac = MAKE_64BIT_MASK(float16_params_ahp.frac_shift,
+ float16_params_ahp.frac_size + 1);
+ break;
- default:
- break;
- }
- } else if (is_nan(a.cls)) {
- parts_return_nan(&a, s);
+ case float_class_normal:
+ case float_class_zero:
+ break;
+
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static void parts64_float_to_float(FloatParts64 *a, float_status *s)
+{
+ if (is_nan(a->cls)) {
+ parts_return_nan(a, s);
+ }
+}
+
+static void parts128_float_to_float(FloatParts128 *a, float_status *s)
+{
+ if (is_nan(a->cls)) {
+ parts_return_nan(a, s);
}
- return a;
}
+#define parts_float_to_float(P, S) \
+ PARTS_GENERIC_64_128(float_to_float, P)(P, S)
+
float32 float16_to_float32(float16 a, bool ieee, float_status *s)
{
const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp;
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float16a_unpack_canonical(&pa, a, s, fmt16);
- pr = float_to_float(pa, &float32_params, s);
- return float32_round_pack_canonical(&pr, s);
+ float16a_unpack_canonical(&p, a, s, fmt16);
+ parts_float_to_float(&p, s);
+ return float32_round_pack_canonical(&p, s);
}
float64 float16_to_float64(float16 a, bool ieee, float_status *s)
{
const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp;
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float16a_unpack_canonical(&pa, a, s, fmt16);
- pr = float_to_float(pa, &float64_params, s);
- return float64_round_pack_canonical(&pr, s);
+ float16a_unpack_canonical(&p, a, s, fmt16);
+ parts_float_to_float(&p, s);
+ return float64_round_pack_canonical(&p, s);
}
float16 float32_to_float16(float32 a, bool ieee, float_status *s)
{
- const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp;
- FloatParts64 pa, pr;
+ FloatParts64 p;
+ const FloatFmt *fmt;
- float32_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, fmt16, s);
- return float16a_round_pack_canonical(&pr, s, fmt16);
+ float32_unpack_canonical(&p, a, s);
+ if (ieee) {
+ parts_float_to_float(&p, s);
+ fmt = &float16_params;
+ } else {
+ parts_float_to_ahp(&p, s);
+ fmt = &float16_params_ahp;
+ }
+ return float16a_round_pack_canonical(&p, s, fmt);
}
static float64 QEMU_SOFTFLOAT_ATTR
soft_float32_to_float64(float32 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float32_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &float64_params, s);
- return float64_round_pack_canonical(&pr, s);
+ float32_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return float64_round_pack_canonical(&p, s);
}
float64 float32_to_float64(float32 a, float_status *s)
@@ -2134,57 +2156,63 @@ float64 float32_to_float64(float32 a, float_status *s)
float16 float64_to_float16(float64 a, bool ieee, float_status *s)
{
- const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp;
- FloatParts64 pa, pr;
+ FloatParts64 p;
+ const FloatFmt *fmt;
- float64_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, fmt16, s);
- return float16a_round_pack_canonical(&pr, s, fmt16);
+ float64_unpack_canonical(&p, a, s);
+ if (ieee) {
+ parts_float_to_float(&p, s);
+ fmt = &float16_params;
+ } else {
+ parts_float_to_ahp(&p, s);
+ fmt = &float16_params_ahp;
+ }
+ return float16a_round_pack_canonical(&p, s, fmt);
}
float32 float64_to_float32(float64 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float64_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &float32_params, s);
- return float32_round_pack_canonical(&pr, s);
+ float64_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return float32_round_pack_canonical(&p, s);
}
float32 bfloat16_to_float32(bfloat16 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- bfloat16_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &float32_params, s);
- return float32_round_pack_canonical(&pr, s);
+ bfloat16_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return float32_round_pack_canonical(&p, s);
}
float64 bfloat16_to_float64(bfloat16 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- bfloat16_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &float64_params, s);
- return float64_round_pack_canonical(&pr, s);
+ bfloat16_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return float64_round_pack_canonical(&p, s);
}
bfloat16 float32_to_bfloat16(float32 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float32_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &bfloat16_params, s);
- return bfloat16_round_pack_canonical(&pr, s);
+ float32_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return bfloat16_round_pack_canonical(&p, s);
}
bfloat16 float64_to_bfloat16(float64 a, float_status *s)
{
- FloatParts64 pa, pr;
+ FloatParts64 p;
- float64_unpack_canonical(&pa, a, s);
- pr = float_to_float(pa, &bfloat16_params, s);
- return bfloat16_round_pack_canonical(&pr, s);
+ float64_unpack_canonical(&p, a, s);
+ parts_float_to_float(&p, s);
+ return bfloat16_round_pack_canonical(&p, s);
}
/*
generated by cgit v1.1 at 2024-12-24 05:20:35 +0000