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authorWill Newton <will.newton@linaro.org>2014-01-07 17:17:48 +0000
committerPeter Maydell <peter.maydell@linaro.org>2014-01-08 19:07:22 +0000
commitf581bf5474d2319ca37484eb63208017ac96ce0a (patch)
treef05a54d2477f6cbf9986797ea6f44cccfb58a0e0 /fpu/softfloat.c
parent38970efafdfa8a992c177563c4f0d77062b88fd9 (diff)
softfloat: Add float to 16bit integer conversions.
ARMv8 requires support for converting 32 and 64bit floating point values to signed and unsigned 16bit integers. Signed-off-by: Will Newton <will.newton@linaro.org> [PMM: updated not to incorrectly set Inexact for Invalid inputs] Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'fpu/softfloat.c')
-rw-r--r--fpu/softfloat.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 6a6b6567d7..dbaa32c7e3 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -6491,6 +6491,46 @@ uint32 float32_to_uint32_round_to_zero( float32 a STATUS_PARAM )
return res;
}
+int_fast16_t float32_to_int16(float32 a STATUS_PARAM)
+{
+ int32_t v;
+ int_fast16_t res;
+ int old_exc_flags = get_float_exception_flags(status);
+
+ v = float32_to_int32(a STATUS_VAR);
+ if (v < -0x8000) {
+ res = -0x8000;
+ } else if (v > 0x7fff) {
+ res = 0x7fff;
+ } else {
+ return v;
+ }
+
+ set_float_exception_flags(old_exc_flags, status);
+ float_raise(float_flag_invalid STATUS_VAR);
+ return res;
+}
+
+uint_fast16_t float32_to_uint16(float32 a STATUS_PARAM)
+{
+ int32_t v;
+ uint_fast16_t res;
+ int old_exc_flags = get_float_exception_flags(status);
+
+ v = float32_to_int32(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffff) {
+ res = 0xffff;
+ } else {
+ return v;
+ }
+
+ set_float_exception_flags(old_exc_flags, status);
+ float_raise(float_flag_invalid STATUS_VAR);
+ return res;
+}
+
uint_fast16_t float32_to_uint16_round_to_zero(float32 a STATUS_PARAM)
{
int64_t v;
@@ -6545,6 +6585,46 @@ uint32 float64_to_uint32_round_to_zero( float64 a STATUS_PARAM )
return res;
}
+int_fast16_t float64_to_int16(float64 a STATUS_PARAM)
+{
+ int64_t v;
+ int_fast16_t res;
+ int old_exc_flags = get_float_exception_flags(status);
+
+ v = float64_to_int32(a STATUS_VAR);
+ if (v < -0x8000) {
+ res = -0x8000;
+ } else if (v > 0x7fff) {
+ res = 0x7fff;
+ } else {
+ return v;
+ }
+
+ set_float_exception_flags(old_exc_flags, status);
+ float_raise(float_flag_invalid STATUS_VAR);
+ return res;
+}
+
+uint_fast16_t float64_to_uint16(float64 a STATUS_PARAM)
+{
+ int64_t v;
+ uint_fast16_t res;
+ int old_exc_flags = get_float_exception_flags(status);
+
+ v = float64_to_int32(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffff) {
+ res = 0xffff;
+ } else {
+ return v;
+ }
+
+ set_float_exception_flags(old_exc_flags, status);
+ float_raise(float_flag_invalid STATUS_VAR);
+ return res;
+}
+
uint_fast16_t float64_to_uint16_round_to_zero(float64 a STATUS_PARAM)
{
int64_t v;