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6f9a004738
This commit adds the pre-UAL aliases of fconsts and fconstd for vmov.f32 and vmov.f64. They use an InstAlias rather than a MnemonicAlias to properly support the predicate operand. We need to support encoded 8-bit constants in order to implement the pre-UAL fconsts/fconstd aliases for vmov.f32/vmov.f64, so this commit also fixes parsing of encoded floating point constants used in vmov.f32/vmov.f64 instructions. Now we can support assembly code like this: fconsts s0, #0x70 which is equivalent to vmov.f32 s0, #1.0. Most of the code was already in place to support this feature. Previously the code was trying to accept encoded 8-bit float constants for the vmov.f32/vmov.f64 instructions. It looks like the support for parsing encoded floats was lost in a refactoring in commit r148556 and we did not have any tests in place to catch it. The change in this commit is to keep the parsed value as a 32-bit float instead of a 64-bit double because that is what the isFPImm() function expects to find. There is no loss of precision by using a 32-bit float here because we are still limited to an 8-bit encoded value in the end. Additionally, we explicitly reject encoded 8-bit floats for vmovf.32/64. This is the same as the current behavior, but we now do it explicitly rather than accidently. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198697 91177308-0d34-0410-b5e6-96231b3b80d8
23 lines
743 B
ArmAsm
23 lines
743 B
ArmAsm
@ RUN: not llvm-mc -mcpu=cortex-a8 -triple armv7-none-linux-gnueabi < %s 2>&1 | FileCheck %s
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@ Test for floating point constants that are out of the 8-bit encoded value range
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vmov.f32 s2, #32.0
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@ CHECK: error: invalid operand for instruction
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vmov.f64 d2, #32.0
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@ CHECK: error: invalid operand for instruction
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@ Test that vmov.f instructions do not accept an 8-bit encoded float as an operand
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vmov.f32 s1, #0x70
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@ CHECK: error: invalid floating point immediate
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vmov.f64 d2, #0x70
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@ CHECK: error: invalid floating point immediate
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@ Test that fconst instructions do not accept a float constant as an operand
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fconsts s1, #1.0
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@ CHECK: error: invalid floating point immediate
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fconstd d2, #1.0
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@ CHECK: error: invalid floating point immediate
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