MdePkg/BaseIoLibIntrinsicArmVirt ARM: avoid double word loads and stores

[mirror_edk2.git] / MdePkg / Library / BaseIoLibIntrinsic / Arm / ArmVirtMmio.asm

diff --git a/MdePkg/Library/BaseIoLibIntrinsic/Arm/ArmVirtMmio.asm b/MdePkg/Library/BaseIoLibIntrinsic/Arm/ArmVirtMmio.asm
index e1a3d68a430c97d348a54ae590b1a82289696118..deba8c1f0c59daf29cc239ffaa3ac90c56875c3c 100644 (file)
--- a/MdePkg/Library/BaseIoLibIntrinsic/Arm/ArmVirtMmio.asm
+++ b/MdePkg/Library/BaseIoLibIntrinsic/Arm/ArmVirtMmio.asm
@@ -127,7 +127,8 @@ MmioWrite32Internal
 ;  @return The value read.\r
 ;\r
 MmioRead64Internal\r
-  ldrd    r0, r1, [r0]\r
+  ldr     r1, [r0, #4]\r
+  ldr     r0, [r0]\r
   dmb\r
   bx      lr\r
 \r
@@ -143,7 +144,8 @@ MmioRead64Internal
 ;\r
 MmioWrite64Internal\r
   dmb     st\r
-  strd    r2, r3, [r0]\r
+  str     r2, [r0]\r
+  str     r3, [r0, #4]\r
   bx      lr\r
 \r
   END\r