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| author | Ben Gamari <ben@smart-cactus.org> | 2022-02-04 13:18:49 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2022-04-06 15:24:01 -0400 |
| commit | ffdbe457189a12d9eca6be2cfab977cd71411766 (patch) | |
| tree | 0a874142a4c7068593a5a65269e0fe737e820e37 | |
| parent | ec4526b5cbb58b93457591e2595c5a66b2a101f9 (diff) | |
| download | haskell-wip/windows-high-codegen.tar.gz | |
nativeGen: Note signed-extended nature of MOVwip/windows-high-codegen
| -rw-r--r-- | compiler/GHC/CmmToAsm/X86/Instr.hs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/GHC/CmmToAsm/X86/Instr.hs b/compiler/GHC/CmmToAsm/X86/Instr.hs index 1f1515b0c9..42b9543204 100644 --- a/compiler/GHC/CmmToAsm/X86/Instr.hs +++ b/compiler/GHC/CmmToAsm/X86/Instr.hs @@ -196,6 +196,10 @@ data Instr -- Moves. | MOV Format Operand Operand + -- ^ N.B. when used with the 'II64' 'Format', the source + -- operand is interpreted to be a 32-bit sign-extended value. + -- True 64-bit operands need to be moved with @MOVABS@, which we + -- currently don't use. | CMOV Cond Format Operand Reg | MOVZxL Format Operand Operand -- ^ The format argument is the size of operand 1 (the number of bits we keep) |