diff options
Diffstat (limited to 'libclc/generic/lib/shared/vstore.cl')
| -rw-r--r-- | libclc/generic/lib/shared/vstore.cl | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/libclc/generic/lib/shared/vstore.cl b/libclc/generic/lib/shared/vstore.cl index bafd76d1ac6..cbddd59795b 100644 --- a/libclc/generic/lib/shared/vstore.cl +++ b/libclc/generic/lib/shared/vstore.cl @@ -108,15 +108,48 @@ _CLC_DEF _CLC_OVERLOAD float __clc_noop(float x) { return x; } +_CLC_DEF _CLC_OVERLOAD float __clc_rtz(float x) +{ + /* Remove lower 13 bits to make sure the number is rounded down */ + int mask = 0xffffe000; + const int exp = (as_uint(x) >> 23 & 0xff) - 127; + /* Denormals cannot be flushed, and they use different bit for rounding */ + if (exp < -14) + mask <<= min(-(exp + 14), 10); + /* RTZ does not produce Inf for large numbers */ + if (fabs(x) > 65504.0f && !isinf(x)) + return copysign(65504.0f, x); + /* Handle nan corner case */ + if (isnan(x)) + return x; + return as_float(as_uint(x) & mask); +} #ifdef cl_khr_fp64 _CLC_DEF _CLC_OVERLOAD double __clc_noop(double x) { return x; } +_CLC_DEF _CLC_OVERLOAD double __clc_rtz(double x) +{ + /* Remove lower 42 bits to make sure the number is rounded down */ + ulong mask = 0xfffffc0000000000UL; + const int exp = (as_ulong(x) >> 52 & 0x7ff) - 1023; + /* Denormals cannot be flushed, and they use different bit for rounding */ + if (exp < -14) + mask <<= min(-(exp + 14), 10); + /* RTZ does not produce Inf for large numbers */ + if (fabs(x) > 65504.0 && !isinf(x)) + return copysign(65504.0, x); + /* Handle nan corner case */ + if (isnan(x)) + return x; + return as_double(as_ulong(x) & mask); +} #endif #define __XFUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS) \ - __FUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_noop) + __FUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_noop) \ + __FUNC(SUFFIX ## _rtz, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rtz) #define FUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS) \ __XFUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS) |
