add loop unrolling to MathArray2D (#1872)

zingale · web-flow · commit 7bb013aaa33e · 2025-11-23T10:55:40.000-05:00
diff --git a/interfaces/ArrayUtilities.H b/interfaces/ArrayUtilities.H
@@ -37,9 +37,10 @@ namespace ArrayUtil
     template <typename T, int XLO, int XHI, int YLO, int YHI>
     struct MathArray2D
     {
-        AMREX_GPU_HOST_DEVICE AMREX_INLINE
+        AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
         void zero()
         {
+            AMREX_UNROLL_LOOP(NET_LOOP_UNROLL_LEN)
             for (int i = 0; i < (YHI-YLO+1)*(XHI-XLO+1); ++i) {
                 arr[i] = 0.0_rt;
             }

Original file line number	Diff line number	Diff line change
`@@ -37,9 +37,10 @@ namespace ArrayUtil`
`37`	`37`	`template <typename T, int XLO, int XHI, int YLO, int YHI>`
`38`	`38`	`struct MathArray2D`
`39`	`39`	`{`
`40`		`- AMREX_GPU_HOST_DEVICE AMREX_INLINE`
	`40`	`+ AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE`
`41`	`41`	`void zero()`
`42`	`42`	`{`
	`43`	`+ AMREX_UNROLL_LOOP(NET_LOOP_UNROLL_LEN)`
`43`	`44`	`for (int i = 0; i < (YHI-YLO+1)*(XHI-XLO+1); ++i) {`
`44`	`45`	`arr[i] = 0.0_rt;`
`45`	`46`	`}`