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3b63d409c9
Summary: The assembler temporary is normally $at ($1) but can be reassigned using '.set at=$reg'. Regardless of which register is nominated as the assembler temporary, $at remains $1 when written by the user. Adds warnings under the following conditions: * The register nominated as the assembler temporary is used by the user. * '.set noat' is in effect and $at is used by the user. Both of these only work for named registers. I have a follow up commit that makes it work for numeric registers as well. XFAIL set-at-directive.s since it incorrectly tests that $at is redefined by '.set at=$reg'. Testcases will follow in a separate commit. Patch by David Chisnall His work was sponsored by: DARPA, AFRL Differential Revision: http://llvm-reviews.chandlerc.com/D3167 llvm-svn: 204710
132 lines
3.7 KiB
ArmAsm
132 lines
3.7 KiB
ArmAsm
# RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding -mcpu=mips32r2 | \
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# RUN: FileCheck %s
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# Check that the assembler can handle the documented syntax
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# for ".set at" and set the correct value.
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# XFAIL:
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.text
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foo:
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# CHECK: jr $1 # encoding: [0x08,0x00,0x20,0x00]
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.set at=$1
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jr $at
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nop
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# CHECK: jr $2 # encoding: [0x08,0x00,0x40,0x00]
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.set at=$2
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jr $at
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nop
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# CHECK: jr $3 # encoding: [0x08,0x00,0x60,0x00]
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.set at=$3
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jr $at
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nop
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# CHECK: jr $4 # encoding: [0x08,0x00,0x80,0x00]
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.set at=$a0
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jr $at
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nop
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# CHECK: jr $5 # encoding: [0x08,0x00,0xa0,0x00]
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.set at=$a1
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jr $at
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nop
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# CHECK: jr $6 # encoding: [0x08,0x00,0xc0,0x00]
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.set at=$a2
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jr $at
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nop
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# CHECK: jr $7 # encoding: [0x08,0x00,0xe0,0x00]
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.set at=$a3
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jr $at
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nop
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# CHECK: jr $8 # encoding: [0x08,0x00,0x00,0x01]
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.set at=$8
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jr $at
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nop
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# CHECK: jr $9 # encoding: [0x08,0x00,0x20,0x01]
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.set at=$9
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jr $at
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nop
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# CHECK: jr $10 # encoding: [0x08,0x00,0x40,0x01]
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.set at=$10
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jr $at
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nop
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# CHECK: jr $11 # encoding: [0x08,0x00,0x60,0x01]
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.set at=$11
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jr $at
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nop
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# CHECK: jr $12 # encoding: [0x08,0x00,0x80,0x01]
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.set at=$12
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jr $at
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nop
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# CHECK: jr $13 # encoding: [0x08,0x00,0xa0,0x01]
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.set at=$13
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jr $at
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nop
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# CHECK: jr $14 # encoding: [0x08,0x00,0xc0,0x01]
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.set at=$14
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jr $at
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nop
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# CHECK: jr $15 # encoding: [0x08,0x00,0xe0,0x01]
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.set at=$15
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jr $at
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nop
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# CHECK: jr $16 # encoding: [0x08,0x00,0x00,0x02]
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.set at=$s0
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jr $at
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nop
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# CHECK: jr $17 # encoding: [0x08,0x00,0x20,0x02]
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.set at=$s1
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jr $at
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nop
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# CHECK: jr $18 # encoding: [0x08,0x00,0x40,0x02]
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.set at=$s2
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jr $at
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nop
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# CHECK: jr $19 # encoding: [0x08,0x00,0x60,0x02]
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.set at=$s3
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jr $at
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nop
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# CHECK: jr $20 # encoding: [0x08,0x00,0x80,0x02]
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.set at=$s4
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jr $at
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nop
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# CHECK: jr $21 # encoding: [0x08,0x00,0xa0,0x02]
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.set at=$s5
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jr $at
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nop
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# CHECK: jr $22 # encoding: [0x08,0x00,0xc0,0x02]
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.set at=$s6
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jr $at
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nop
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# CHECK: jr $23 # encoding: [0x08,0x00,0xe0,0x02]
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.set at=$s7
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jr $at
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nop
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# CHECK: jr $24 # encoding: [0x08,0x00,0x00,0x03]
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.set at=$24
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jr $at
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nop
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# CHECK: jr $25 # encoding: [0x08,0x00,0x20,0x03]
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.set at=$25
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jr $at
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nop
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# CHECK: jr $26 # encoding: [0x08,0x00,0x40,0x03]
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.set at=$26
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jr $at
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nop
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# CHECK: jr $27 # encoding: [0x08,0x00,0x60,0x03]
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.set at=$27
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jr $at
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nop
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# CHECK: jr $gp # encoding: [0x08,0x00,0x80,0x03]
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.set at=$gp
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jr $at
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nop
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# CHECK: jr $fp # encoding: [0x08,0x00,0xc0,0x03]
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.set at=$fp
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jr $at
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nop
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# CHECK: jr $sp # encoding: [0x08,0x00,0xa0,0x03]
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.set at=$sp
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jr $at
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nop
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# CHECK: jr $ra # encoding: [0x08,0x00,0xe0,0x03]
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.set at=$ra
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jr $at
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nop
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