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authorElie Tournier <tournier.elie@gmail.com>2017-08-08 14:23:26 +0100
committerMatt Turner <mattst88@gmail.com>2019-01-09 16:42:40 -0800
commitec6e823a99168b7359e76f274641424f778211ef (patch)
treef0a755fdfecdf01b905f0cb2e1542fa56d19065d /src
parentc802cdde9df1295fe0d6d6a3dbf4151f46070d19 (diff)
glsl: Add "built-in" functions to do eq/ne(fp64, fp64)
Diffstat (limited to 'src')
-rw-r--r--src/compiler/glsl/float64.glsl56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index 31aae3fca22..2cf85bbcafc 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -103,3 +103,59 @@ __fsign64(uint64_t __a)
retval.y = mix((a.y & 0x80000000u) | 0x3FF00000u, 0u, (a.y << 1 | a.x) == 0u);
return packUint2x32(retval);
}
+
+/* Returns the fraction bits of the double-precision floating-point value `a'.*/
+uint
+__extractFloat64FracLo(uint64_t a)
+{
+ return unpackUint2x32(a).x;
+}
+
+uint
+__extractFloat64FracHi(uint64_t a)
+{
+ return unpackUint2x32(a).y & 0x000FFFFFu;
+}
+
+/* Returns the exponent bits of the double-precision floating-point value `a'.*/
+int
+__extractFloat64Exp(uint64_t __a)
+{
+ uvec2 a = unpackUint2x32(__a);
+ return int((a.y>>20) & 0x7FFu);
+}
+
+bool
+__feq64_nonnan(uint64_t __a, uint64_t __b)
+{
+ uvec2 a = unpackUint2x32(__a);
+ uvec2 b = unpackUint2x32(__b);
+ return (a.x == b.x) &&
+ ((a.y == b.y) || ((a.x == 0u) && (((a.y | b.y)<<1) == 0u)));
+}
+
+/* Returns true if the double-precision floating-point value `a' is equal to the
+ * corresponding value `b', and false otherwise. The comparison is performed
+ * according to the IEEE Standard for Floating-Point Arithmetic.
+ */
+bool
+__feq64(uint64_t a, uint64_t b)
+{
+ if (__is_nan(a) || __is_nan(b))
+ return false;
+
+ return __feq64_nonnan(a, b);
+}
+
+/* Returns true if the double-precision floating-point value `a' is not equal
+ * to the corresponding value `b', and false otherwise. The comparison is
+ * performed according to the IEEE Standard for Floating-Point Arithmetic.
+ */
+bool
+__fne64(uint64_t a, uint64_t b)
+{
+ if (__is_nan(a) || __is_nan(b))
+ return true;
+
+ return !__feq64_nonnan(a, b);
+}