Author: jvesely
Date: Tue Feb 6 10:44:50 2018
New Revision: 324376
URL: http://llvm.org/viewvc/llvm-project?rev=324376&view=rev
Log:
Add vstore_half_rte implementation
Passes CTS on carrizo
Reviewer: Jeroen Ketema <j.ket...@xs4all.nl>
Signed-off-by: Jan Vesely <jan.ves...@rutgers.edu>
Modified:
libclc/trunk/generic/include/clc/shared/vstore.h
libclc/trunk/generic/lib/shared/vstore.cl
Modified: libclc/trunk/generic/include/clc/shared/vstore.h
URL:
http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/shared/vstore.h?rev=324376&r1=324375&r2=324376&view=diff
==============================================================================
--- libclc/trunk/generic/include/clc/shared/vstore.h (original)
+++ libclc/trunk/generic/include/clc/shared/vstore.h Tue Feb 6 10:44:50 2018
@@ -40,6 +40,7 @@ _CLC_VECTOR_VSTORE_HALF_PRIM1(float,)
_CLC_VECTOR_VSTORE_HALF_PRIM1(float, _rtz)
_CLC_VECTOR_VSTORE_HALF_PRIM1(float, _rtn)
_CLC_VECTOR_VSTORE_HALF_PRIM1(float, _rtp)
+_CLC_VECTOR_VSTORE_HALF_PRIM1(float, _rte)
#ifdef cl_khr_fp64
_CLC_VECTOR_VSTORE_PRIM1(double)
@@ -47,6 +48,7 @@ _CLC_VECTOR_VSTORE_HALF_PRIM1(float, _rt
_CLC_VECTOR_VSTORE_HALF_PRIM1(double, _rtz)
_CLC_VECTOR_VSTORE_HALF_PRIM1(double, _rtn)
_CLC_VECTOR_VSTORE_HALF_PRIM1(double, _rtp)
+ _CLC_VECTOR_VSTORE_HALF_PRIM1(double, _rte)
#endif
#ifdef cl_khr_fp16
Modified: libclc/trunk/generic/lib/shared/vstore.cl
URL:
http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/shared/vstore.cl?rev=324376&r1=324375&r2=324376&view=diff
==============================================================================
--- libclc/trunk/generic/lib/shared/vstore.cl (original)
+++ libclc/trunk/generic/lib/shared/vstore.cl Tue Feb 6 10:44:50 2018
@@ -147,6 +147,27 @@ _CLC_DEF _CLC_OVERLOAD float __clc_rtp(f
{
return ((as_uint(x) & 0x80000000) == 0) ? __clc_rti(x) : __clc_rtz(x);
}
+_CLC_DEF _CLC_OVERLOAD float __clc_rte(float x)
+{
+ /* Mantisa + implicit bit */
+ const uint mantissa = (as_uint(x) & 0x7fffff) | (1u << 23);
+ const int exp = (as_uint(x) >> 23 & 0xff) - 127;
+ int shift = 13;
+ if (exp < -14) {
+ /* The default assumes lower 13 bits are rounded,
+ * but it might be more for denormals.
+ * Shifting beyond last == 0b, and qr == 00b is not necessary */
+ shift += min(-(exp + 14), 15);
+ }
+ int mask = (1 << shift) - 1;
+ const uint grs = mantissa & mask;
+ const uint last = mantissa & (1 << shift);
+ /* IEEE round up rule is: grs > 101b or grs == 100b and last == 1.
+ * exp > 15 should round to inf. */
+ bool roundup = (grs > (1 << (shift - 1))) ||
+ (grs == (1 << (shift - 1)) && last != 0) || (exp > 15);
+ return roundup ? __clc_rti(x) : __clc_rtz(x);
+}
#ifdef cl_khr_fp64
_CLC_DEF _CLC_OVERLOAD double __clc_noop(double x)
@@ -192,13 +213,35 @@ _CLC_DEF _CLC_OVERLOAD double __clc_rtp(
{
return ((as_ulong(x) & 0x8000000000000000UL) == 0) ? __clc_rti(x) :
__clc_rtz(x);
}
+_CLC_DEF _CLC_OVERLOAD double __clc_rte(double x)
+{
+ /* Mantisa + implicit bit */
+ const ulong mantissa = (as_ulong(x) & 0xfffffffffffff) | (1UL << 52);
+ const int exp = (as_ulong(x) >> 52 & 0x7ff) - 1023;
+ int shift = 42;
+ if (exp < -14) {
+ /* The default assumes lower 13 bits are rounded,
+ * but it might be more for denormals.
+ * Shifting beyond last == 0b, and qr == 00b is not necessary */
+ shift += min(-(exp + 14), 15);
+ }
+ ulong mask = (1UL << shift) - 1UL;
+ const ulong grs = mantissa & mask;
+ const ulong last = mantissa & (1UL << shift);
+ /* IEEE round up rule is: grs > 101b or grs == 100b and last == 1.
+ * exp > 15 should round to inf. */
+ bool roundup = (grs > (1UL << (shift - 1UL))) ||
+ (grs == (1UL << (shift - 1UL)) && last != 0) || (exp > 15);
+ return roundup ? __clc_rti(x) : __clc_rtz(x);
+}
#endif
#define __XFUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS) \
__FUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_noop) \
__FUNC(SUFFIX ## _rtz, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rtz) \
__FUNC(SUFFIX ## _rtn, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rtn) \
- __FUNC(SUFFIX ## _rtp, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rtp)
+ __FUNC(SUFFIX ## _rtp, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rtp) \
+ __FUNC(SUFFIX ## _rte, VEC_SIZE, OFFSET, TYPE, STYPE, AS, __clc_rte)
#define FUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS) \
__XFUNC(SUFFIX, VEC_SIZE, OFFSET, TYPE, STYPE, AS)
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