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https://gitlab.com/qemu-project/qemu
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fpu/softfloat: Split floatXX_silence_nan from floatXX_maybe_silence_nan
The new function assumes that the input is an SNaN and does not double-check. Tested-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
parent
bca52234d1
commit
d619bb98fd
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@ -271,22 +271,35 @@ int float16_is_signaling_nan(float16 a_, float_status *status)
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN from a signalling NaN for the half-precision
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| floating point value `a'.
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*----------------------------------------------------------------------------*/
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float16 float16_silence_nan(float16 a, float_status *status)
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{
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#ifdef NO_SIGNALING_NANS
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g_assert_not_reached();
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#else
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if (status->snan_bit_is_one) {
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return float16_default_nan(status);
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} else {
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return a | (1 << 9);
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}
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN if the half-precision floating point value `a' is a
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| signaling NaN; otherwise returns `a'.
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*----------------------------------------------------------------------------*/
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float16 float16_maybe_silence_nan(float16 a_, float_status *status)
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float16 float16_maybe_silence_nan(float16 a, float_status *status)
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{
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if (float16_is_signaling_nan(a_, status)) {
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if (status->snan_bit_is_one) {
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return float16_default_nan(status);
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} else {
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uint16_t a = float16_val(a_);
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a |= (1 << 9);
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return make_float16(a);
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}
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if (float16_is_signaling_nan(a, status)) {
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return float16_silence_nan(a, status);
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}
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return a_;
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return a;
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}
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/*----------------------------------------------------------------------------
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@ -367,30 +380,40 @@ int float32_is_signaling_nan(float32 a_, float_status *status)
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN from a signalling NaN for the single-precision
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| floating point value `a'.
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*----------------------------------------------------------------------------*/
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float32 float32_silence_nan(float32 a, float_status *status)
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{
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#ifdef NO_SIGNALING_NANS
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g_assert_not_reached();
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#else
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if (status->snan_bit_is_one) {
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# ifdef TARGET_HPPA
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a &= ~0x00400000;
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a |= 0x00200000;
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return a;
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# else
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return float32_default_nan(status);
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# endif
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} else {
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return a | (1 << 22);
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}
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN if the single-precision floating point value `a' is a
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| signaling NaN; otherwise returns `a'.
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*----------------------------------------------------------------------------*/
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float32 float32_maybe_silence_nan(float32 a_, float_status *status)
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float32 float32_maybe_silence_nan(float32 a, float_status *status)
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{
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if (float32_is_signaling_nan(a_, status)) {
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if (status->snan_bit_is_one) {
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#ifdef TARGET_HPPA
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uint32_t a = float32_val(a_);
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a &= ~0x00400000;
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a |= 0x00200000;
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return make_float32(a);
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#else
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return float32_default_nan(status);
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#endif
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} else {
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uint32_t a = float32_val(a_);
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a |= (1 << 22);
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return make_float32(a);
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}
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if (float32_is_signaling_nan(a, status)) {
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return float32_silence_nan(a, status);
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}
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return a_;
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return a;
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}
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/*----------------------------------------------------------------------------
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@ -776,30 +799,41 @@ int float64_is_signaling_nan(float64 a_, float_status *status)
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN from a signalling NaN for the double-precision
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| floating point value `a'.
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*----------------------------------------------------------------------------*/
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float64 float64_silence_nan(float64 a, float_status *status)
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{
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#ifdef NO_SIGNALING_NANS
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g_assert_not_reached();
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#else
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if (status->snan_bit_is_one) {
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# ifdef TARGET_HPPA
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a &= ~0x0008000000000000ULL;
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a |= 0x0004000000000000ULL;
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return a;
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# else
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return float64_default_nan(status);
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# endif
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} else {
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return a | LIT64(0x0008000000000000);
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}
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN if the double-precision floating point value `a' is a
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| signaling NaN; otherwise returns `a'.
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*----------------------------------------------------------------------------*/
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float64 float64_maybe_silence_nan(float64 a_, float_status *status)
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float64 float64_maybe_silence_nan(float64 a, float_status *status)
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{
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if (float64_is_signaling_nan(a_, status)) {
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if (status->snan_bit_is_one) {
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#ifdef TARGET_HPPA
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uint64_t a = float64_val(a_);
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a &= ~0x0008000000000000ULL;
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a |= 0x0004000000000000ULL;
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return make_float64(a);
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#else
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return float64_default_nan(status);
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#endif
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} else {
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uint64_t a = float64_val(a_);
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a |= LIT64(0x0008000000000000);
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return make_float64(a);
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}
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if (float64_is_signaling_nan(a, status)) {
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return float64_silence_nan(a, status);
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}
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return a_;
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return a;
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}
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/*----------------------------------------------------------------------------
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@ -937,6 +971,25 @@ int floatx80_is_signaling_nan(floatx80 a, float_status *status)
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN from a signalling NaN for the extended double-precision
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| floating point value `a'.
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*----------------------------------------------------------------------------*/
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floatx80 floatx80_silence_nan(floatx80 a, float_status *status)
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{
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#ifdef NO_SIGNALING_NANS
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g_assert_not_reached();
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#else
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if (status->snan_bit_is_one) {
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return floatx80_default_nan(status);
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} else {
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a.low |= LIT64(0xC000000000000000);
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return a;
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}
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN if the extended double-precision floating point value
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| `a' is a signaling NaN; otherwise returns `a'.
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@ -945,12 +998,7 @@ int floatx80_is_signaling_nan(floatx80 a, float_status *status)
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floatx80 floatx80_maybe_silence_nan(floatx80 a, float_status *status)
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{
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if (floatx80_is_signaling_nan(a, status)) {
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if (status->snan_bit_is_one) {
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a = floatx80_default_nan(status);
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} else {
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a.low |= LIT64(0xC000000000000000);
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return a;
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}
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return floatx80_silence_nan(a, status);
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}
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return a;
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}
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@ -1084,6 +1132,25 @@ int float128_is_signaling_nan(float128 a, float_status *status)
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN from a signalling NaN for the quadruple-precision
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| floating point value `a'.
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*----------------------------------------------------------------------------*/
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float128 float128_silence_nan(float128 a, float_status *status)
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{
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#ifdef NO_SIGNALING_NANS
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g_assert_not_reached();
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#else
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if (status->snan_bit_is_one) {
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return float128_default_nan(status);
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} else {
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a.high |= LIT64(0x0000800000000000);
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return a;
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}
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#endif
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}
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/*----------------------------------------------------------------------------
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| Returns a quiet NaN if the quadruple-precision floating point value `a' is
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| a signaling NaN; otherwise returns `a'.
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@ -1092,12 +1159,7 @@ int float128_is_signaling_nan(float128 a, float_status *status)
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float128 float128_maybe_silence_nan(float128 a, float_status *status)
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{
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if (float128_is_signaling_nan(a, status)) {
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if (status->snan_bit_is_one) {
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a = float128_default_nan(status);
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} else {
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a.high |= LIT64(0x0000800000000000);
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return a;
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}
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return float128_silence_nan(a, status);
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}
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return a;
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}
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@ -257,6 +257,7 @@ int float16_compare_quiet(float16, float16, float_status *status);
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int float16_is_quiet_nan(float16, float_status *status);
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int float16_is_signaling_nan(float16, float_status *status);
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float16 float16_silence_nan(float16, float_status *status);
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float16 float16_maybe_silence_nan(float16, float_status *status);
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static inline int float16_is_any_nan(float16 a)
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@ -368,6 +369,7 @@ float32 float32_minnummag(float32, float32, float_status *status);
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float32 float32_maxnummag(float32, float32, float_status *status);
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int float32_is_quiet_nan(float32, float_status *status);
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int float32_is_signaling_nan(float32, float_status *status);
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float32 float32_silence_nan(float32, float_status *status);
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float32 float32_maybe_silence_nan(float32, float_status *status);
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float32 float32_scalbn(float32, int, float_status *status);
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@ -497,6 +499,7 @@ float64 float64_minnummag(float64, float64, float_status *status);
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float64 float64_maxnummag(float64, float64, float_status *status);
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int float64_is_quiet_nan(float64 a, float_status *status);
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int float64_is_signaling_nan(float64, float_status *status);
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float64 float64_silence_nan(float64, float_status *status);
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float64 float64_maybe_silence_nan(float64, float_status *status);
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float64 float64_scalbn(float64, int, float_status *status);
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@ -600,6 +603,7 @@ int floatx80_compare(floatx80, floatx80, float_status *status);
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int floatx80_compare_quiet(floatx80, floatx80, float_status *status);
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int floatx80_is_quiet_nan(floatx80, float_status *status);
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int floatx80_is_signaling_nan(floatx80, float_status *status);
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floatx80 floatx80_silence_nan(floatx80, float_status *status);
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floatx80 floatx80_maybe_silence_nan(floatx80, float_status *status);
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floatx80 floatx80_scalbn(floatx80, int, float_status *status);
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@ -811,6 +815,7 @@ int float128_compare(float128, float128, float_status *status);
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int float128_compare_quiet(float128, float128, float_status *status);
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int float128_is_quiet_nan(float128, float_status *status);
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int float128_is_signaling_nan(float128, float_status *status);
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float128 float128_silence_nan(float128, float_status *status);
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float128 float128_maybe_silence_nan(float128, float_status *status);
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float128 float128_scalbn(float128, int, float_status *status);
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