Changeset 94023 in vbox

Timestamp:

Mar 1, 2022 10:43:43 AM (3 years ago)

Author:

vboxsync

Message:

include/iprt/asm.h: Use the Q constraint instead of m for the arm64 atomic inline assembly stuff, m allows the compiler to generate a base register + immediate while Q results in a base register only which is required for some instructions (offset must be 0), bugref:9898

File:

• trunk/include/iprt/asm.h (modified) (15 diffs)

trunk/include/iprt/asm.h

@@ -217 +217 @@
                          "stlxr     %w[rc], %w[uNew], %[pMem]\n\t" \
                          "cbnz      %w[rc], .Ltry_again_" #name "_%=\n\t" \
-                         : [pMem] "+m"  (*a_pu32Mem) \
+                         : [pMem] "+Q"  (*a_pu32Mem) \
                          , [uNew] "=&r" (u32NewRet) \
                          , [rc]   "=&r" (rcSpill) \
@@ -232 +232 @@
                          "stlxr     %w[rc], %w[uNew], %[pMem]\n\t" \
                          "cbnz      %w[rc], .Ltry_again_" #name "_%=\n\t" \
-                         : [pMem] "+m"  (*a_pu32Mem) \
+                         : [pMem] "+Q"  (*a_pu32Mem) \
                          , [uOld] "=&r" (u32OldRet) \
                          , [uNew] "=&r" (u32NewSpill) \
@@ -247 +247 @@
                          "stlxr     %w[rc], %[uNew], %[pMem]\n\t" \
                          "cbnz      %w[rc], .Ltry_again_" #name "_%=\n\t" \
-                         : [pMem] "+m"  (*a_pu64Mem) \
+                         : [pMem] "+Q"  (*a_pu64Mem) \
                          , [uNew] "=&r" (u64NewRet) \
                          , [rc]   "=&r" (rcSpill) \
@@ -262 +262 @@
                          "stlxr     %w[rc], %[uNew], %[pMem]\n\t" \
                          "cbnz      %w[rc], .Ltry_again_" #name "_%=\n\t" \
-                         : [pMem] "+m"  (*a_pu64Mem) \
+                         : [pMem] "+Q"  (*a_pu64Mem) \
                          , [uOld] "=&r" (u64OldRet) \
                          , [uNew] "=&r" (u64NewSpill) \
@@ -520 +520 @@
                          "bne       .Ltry_again_ASMAtomicXchgU8_%=\n\t"
 #  endif
-                         : [pMem] "+m" (*pu8)
+                         : [pMem] "+Q" (*pu8)
                          , [uOld] "=&r" (uOld)
                          , [rc]   "=&r" (rcSpill)
@@ -617 +617 @@
                          "bne       .Ltry_again_ASMAtomicXchgU16_%=\n\t"
 #  endif
-                         : [pMem] "+m" (*pu16)
+                         : [pMem] "+Q" (*pu16)
                          , [uOld] "=&r" (uOld)
                          , [rc]   "=&r" (rcSpill)
@@ -703 +703 @@
                          "bne       .Ltry_again_ASMAtomicXchgU32_%=\n\t"
 #  endif
-                         : [pMem] "+m"  (*pu32)
+                         : [pMem] "+Q"  (*pu32)
                          , [uOld] "=&r" (uOld)
                          , [rc]   "=&r" (rcSpill)
@@ -829 +829 @@
                          "bne       .Ltry_again_ASMAtomicXchgU64_%=\n\t"
 #  endif
-                         : [pMem] "+m"  (*pu64)
+                         : [pMem] "+Q"  (*pu64)
                          , [uOld] "=&r" (uOld)
                          , [rc]   "=&r" (rcSpill)
@@ -1094 +1094 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu8)
+                         : [pMem]   "+Q"  (*pu8)
                          , [uOld]   "=&r" (u32Spill)
                          , [rc]     "=&r" (rcSpill)
@@ -1231 +1231 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu32)
+                         : [pMem]   "+Q"  (*pu32)
                          , [uOld]   "=&r" (u32Spill)
                          , [rc]     "=&r" (rcSpill)
@@ -1394 +1394 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu64)
+                         : [pMem]   "+Q"  (*pu64)
                          , [uOld]   "=&r" (u64Spill)
                          , [rc]     "=&r" (rcSpill)
@@ -1738 +1738 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu8)
+                         : [pMem]   "+Q"  (*pu8)
                          , [uOld]   "=&r" (u8ActualOld)
                          , [rc]     "=&r" (rcSpill)
@@ -1863 +1863 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu16)
+                         : [pMem]   "+Q"  (*pu16)
                          , [uOld]   "=&r" (u16ActualOld)
                          , [rc]     "=&r" (rcSpill)
@@ -1988 +1988 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu32)
+                         : [pMem]   "+Q"  (*pu32)
                          , [uOld]   "=&r" (u32ActualOld)
                          , [rc]     "=&r" (rcSpill)
@@ -2154 +2154 @@
 #  endif
                          "1:\n\t"
-                         : [pMem]   "+m"  (*pu64)
+                         : [pMem]   "+Q"  (*pu64)
                          , [uOld]   "=&r" (u64ActualOld)
                          , [rc]     "=&r" (rcSpill)