diff options
Diffstat (limited to 'src/jit')
| -rw-r--r-- | src/jit/compiler.h | 1 | ||||
| -rw-r--r-- | src/jit/regset.cpp | 9 |
2 files changed, 6 insertions, 4 deletions
diff --git a/src/jit/compiler.h b/src/jit/compiler.h index e5bd4436a2..ee76c2810d 100644 --- a/src/jit/compiler.h +++ b/src/jit/compiler.h @@ -660,6 +660,7 @@ public: // For 32-bit architectures, we make local variable SIMD12 types 16 bytes instead of just 12. We can't do // this for arguments, which must be passed according the defined ABI. We don't want to do this for // dependently promoted struct fields, but we don't know that here. See lvaMapSimd12ToSimd16(). + // (Note that for 64-bits, we are already rounding up to 16.) if ((lvType == TYP_SIMD12) && !lvIsParam) { assert(lvExactSize == 12); diff --git a/src/jit/regset.cpp b/src/jit/regset.cpp index 81887cc94e..8e41edfb0b 100644 --- a/src/jit/regset.cpp +++ b/src/jit/regset.cpp @@ -619,10 +619,11 @@ var_types RegSet::tmpNormalizeType(var_types type) { type = genActualType(type); -#if defined(FEATURE_SIMD) && !defined(_TARGET_64BIT_) - // For SIMD on 32-bit platforms, we always spill SIMD12 to a 16-byte SIMD16 temp. - // This is because we don't have a single instruction to store 12 bytes. We also - // allocate non-argument locals as 16 bytes; see lvSize(). +#if defined(FEATURE_SIMD) + // We always spill SIMD12 to a 16-byte SIMD16 temp. + // This is because we don't have a single instruction to store 12 bytes, so we want + // to ensure that we always have the full 16 bytes for loading & storing the value. + // We also allocate non-argument locals as 16 bytes; see lvSize(). if (type == TYP_SIMD12) { type = TYP_SIMD16; |