tanpi: Port from amd_builtins

Passes piglit on turks and carrizo.
Passes CTS on carrizo.

Acked-By: Aaron Watry <awatry@gmail.com>
Tested-By: Aaron Watry <awatry@gmail.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 322980

6 files changed, 168 insertions, 0 deletions

diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
index 930bbfc176d..edb67fd9acd 100644
--- a/libclc/generic/include/clc/clc.h
+++ b/libclc/generic/include/clc/clc.h
@@ -111,6 +111,7 @@
 #include <clc/math/sqrt.h>
 #include <clc/math/tan.h>
 #include <clc/math/tanh.h>
+#include <clc/math/tanpi.h>
 #include <clc/math/tgamma.h>
 #include <clc/math/trunc.h>
 #include <clc/math/native_cos.h>
diff --git a/libclc/generic/include/clc/math/tanpi.h b/libclc/generic/include/clc/math/tanpi.h
new file mode 100644
index 00000000000..e883122785a
--- /dev/null
+++ b/libclc/generic/include/clc/math/tanpi.h
@@ -0,0 +1,7 @@
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION tanpi
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/libclc/generic/include/math/clc_tanpi.h b/libclc/generic/include/math/clc_tanpi.h
new file mode 100644
index 00000000000..7900b1d48ba
--- /dev/null
+++ b/libclc/generic/include/math/clc_tanpi.h
@@ -0,0 +1,5 @@
+#define __CLC_FUNCTION __clc_tanpi
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#include <clc/math/gentype.inc>
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
index 4546a9ef610..31092866743 100644
--- a/libclc/generic/lib/SOURCES
+++ b/libclc/generic/lib/SOURCES
@@ -167,6 +167,8 @@ math/sqrt.cl
 math/clc_tan.cl
 math/tan.cl
 math/tanh.cl
+math/clc_tanpi.cl
+math/tanpi.cl
 math/tgamma.cl
 misc/shuffle.cl
 misc/shuffle2.cl
diff --git a/libclc/generic/lib/math/clc_tanpi.cl b/libclc/generic/lib/math/clc_tanpi.cl
new file mode 100644
index 00000000000..d57c3ce3eb2
--- /dev/null
+++ b/libclc/generic/lib/math/clc_tanpi.cl
@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include <clc/clc.h>
+
+#include "math.h"
+#include "sincos_helpers.h"
+#include "../clcmacro.h"
+#include "tables.h"
+
+_CLC_DEF _CLC_OVERLOAD float __clc_tanpi(float x)
+{
+    int ix = as_int(x);
+    int xsgn = ix & 0x80000000;
+    int xnsgn = xsgn ^ 0x80000000;
+    ix ^= xsgn;
+    float ax = as_float(ix);
+    int iax = (int)ax;
+    float r = ax - iax;
+    int xodd = xsgn ^ (iax & 0x1 ? 0x80000000 : 0);
+
+    // Initialize with return for +-Inf and NaN
+    int ir = 0x7fc00000;
+
+    // 2^24 <= |x| < Inf, the result is always even integer
+    ir = ix < 0x7f800000 ? xsgn : ir;
+
+    // 2^23 <= |x| < 2^24, the result is always integer
+    ir = ix < 0x4b800000 ? xodd : ir;
+
+    // 0x1.0p-7 <= |x| < 2^23, result depends on which 0.25 interval
+
+    // r < 1.0
+    float a = 1.0f - r;
+    int e = 0;
+    int s = xnsgn;
+
+    // r <= 0.75
+    int c = r <= 0.75f;
+    a = c ? r - 0.5f : a;
+    e = c ? 1 : e;
+    s = c ? xsgn : s;
+
+    // r < 0.5
+    c = r < 0.5f;
+    a = c ? 0.5f - r : a;
+    s = c ? xnsgn : s;
+
+    // 0 < r <= 0.25
+    c = r <= 0.25f;
+    a = c ? r : a;
+    e = c ? 0 : e;
+    s = c ? xsgn : s;
+
+    float t = __clc_tanf_piby4(a * M_PI_F, 0);
+    float tr = -native_recip(t);
+    int jr = s ^ as_int(e ? tr : t);
+
+    jr = r == 0.5f ? xodd | 0x7f800000 : jr;
+
+    ir = ix < 0x4b000000 ? jr : ir;
+
+    return as_float(ir);
+}
+_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, float, __clc_tanpi, float);
+
+#ifdef cl_khr_fp64
+#include "sincosD_piby4.h"
+
+_CLC_DEF _CLC_OVERLOAD double __clc_tanpi(double x)
+{
+    long ix = as_long(x);
+    long xsgn = ix & 0x8000000000000000L;
+    long xnsgn = xsgn ^ 0x8000000000000000L;
+    ix ^= xsgn;
+    double ax = as_double(ix);
+    long iax = (long)ax;
+    double r = ax - iax;
+    long xodd = xsgn ^ (iax & 0x1 ? 0x8000000000000000L : 0L);
+
+    // Initialize with return for +-Inf and NaN
+    long ir = 0x7ff8000000000000L;
+
+    // 2^53 <= |x| < Inf, the result is always even integer
+    ir = ix < 0x7ff0000000000000L ? xsgn : ir;
+
+    // 2^52 <= |x| < 2^53, the result is always integer
+    ir = ix < 0x4340000000000000L ? xodd : ir;
+
+    // 0x1.0p-14 <= |x| < 2^53, result depends on which 0.25 interval
+
+    // r < 1.0
+    double a = 1.0 - r;
+    int e = 0;
+    long s = xnsgn;
+
+    // r <= 0.75
+    int c = r <= 0.75;
+    double t = r - 0.5;
+    a = c ? t : a;
+    e = c ? 1 : e;
+    s = c ? xsgn : s;
+
+    // r < 0.5
+    c = r < 0.5;
+    t = 0.5 - r;
+    a = c ? t : a;
+    s = c ? xnsgn : s;
+
+    // r <= 0.25
+    c = r <= 0.25;
+    a = c ? r : a;
+    e = c ? 0 : e;
+    s = c ? xsgn : s;
+
+    double api = a * M_PI;
+    double2 tt = __clc_tan_piby4(api, 0.0);
+    long jr = s ^ as_long(e ? tt.hi : tt.lo);
+
+    long si = xodd | 0x7ff0000000000000L;
+    jr = r == 0.5 ? si : jr;
+
+    ir = ix < 0x4330000000000000L ? jr : ir;
+
+    return as_double(ir);
+}
+_CLC_UNARY_VECTORIZE(_CLC_DEF _CLC_OVERLOAD, double, __clc_tanpi, double);
+#endif
diff --git a/libclc/generic/lib/math/tanpi.cl b/libclc/generic/lib/math/tanpi.cl
new file mode 100644
index 00000000000..0012fb43f11
--- /dev/null
+++ b/libclc/generic/lib/math/tanpi.cl
@@ -0,0 +1,7 @@
+#include <clc/clc.h>
+
+#include <math/clc_tanpi.h>
+
+#define __CLC_FUNC tanpi
+#define __CLC_BODY <clc_sw_unary.inc>
+#include <clc/math/gentype.inc>