summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorSagar Ghuge <sagar.ghuge@intel.com>2018-12-05 17:02:42 -0800
committerMatt Turner <mattst88@gmail.com>2019-01-09 16:42:40 -0800
commitd5cf6e92b4f76e55b2b9013b1332ead34881858f (patch)
treec7cf56188bd72919d02cf3f8ac1f44df94d007d1
parentb830efb191279e8fba480356c582d41e7f49ee78 (diff)
glsl: Add "built-in" functions to do uint64_to_fp32(uint64_t)
Reviewed-by: Elie Tournier <tournier.elie@gmail.com> Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
-rw-r--r--src/compiler/glsl/float64.glsl20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index e8f6acc3c30..da805131dc3 100644
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -1100,6 +1100,26 @@ __fp64_to_fp32(uint64_t __a)
return __roundAndPackFloat32(aSign, aExp - 0x381, zFrac);
}
+float
+__uint64_to_fp32(uint64_t __a)
+{
+ uint zFrac = 0u;
+ uvec2 aFrac = unpackUint2x32(__a);
+ int shiftCount = __countLeadingZeros32(mix(aFrac.y, aFrac.x, aFrac.y == 0u));
+ shiftCount -= mix(40, 8, aFrac.y == 0u);
+
+ if (0 <= shiftCount) {
+ __shortShift64Left(aFrac.y, aFrac.x, shiftCount, aFrac.y, aFrac.x);
+ bool is_zero = (aFrac.y | aFrac.x) == 0u;
+ return mix(__packFloat32(0u, 0x95 - shiftCount, aFrac.x), 0, is_zero);
+ }
+
+ shiftCount += 7;
+ __shift64RightJamming(aFrac.y, aFrac.x, -shiftCount, aFrac.y, aFrac.x);
+ zFrac = mix(aFrac.x<<shiftCount, aFrac.x, shiftCount < 0);
+ return __roundAndPackFloat32(0u, 0x9C - shiftCount, zFrac);
+}
+
/* Returns the result of converting the single-precision floating-point value
* `a' to the double-precision floating-point format.
*/