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F1.2 Standard assembler syntax fields describes .w and .n suffixes for wide and narrow encodings. arch/arm/probes/kprobes/test-thumb.c tests installing kprobes for certain instructions using inline asm. There's a few instructions we fail to assemble due to missing .w t2InstAliases. Adds .w suffixes for: * bl (F5.1.25 BL, BLX (immediate) T1) * dbg (F5.1.42 DBG T1) Reviewed By: DavidSpickett Differential Revision: https://reviews.llvm.org/D97236
311 lines
13 KiB
ArmAsm
311 lines
13 KiB
ArmAsm
@ RUN: llvm-mc -triple=thumbv7-apple-darwin -mcpu=cortex-a8 -show-encoding < %s | FileCheck %s
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@------------------------------------------------------------------------------
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@ unconditional branches accept narrow suffix and encode to short encodings
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@------------------------------------------------------------------------------
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b.n #-2048
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b.n #2046
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@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: b #2046 @ encoding: [0xff,0xe3]
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@------------------------------------------------------------------------------
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@ unconditional branches accept wide suffix and encode to wide encodings
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@------------------------------------------------------------------------------
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b.w #-2048
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b.w #2046
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b.w #-1677216
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b.w #1677214
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@ CHECK: b.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
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@ CHECK: b.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
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@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ unconditional branches without width suffix encode depending of offset size
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@------------------------------------------------------------------------------
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b #-2048
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b #2046
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b #-2050
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b #2048
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b #-1677216
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b #1677214
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@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: b #2046 @ encoding: [0xff,0xe3]
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@ CHECK: b.w #-2050 @ encoding: [0xff,0xf7,0xff,0xbb]
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@ CHECK: b.w #2048 @ encoding: [0x00,0xf0,0x00,0xbc]
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@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ unconditional branches with width narrow suffix in IT block
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@------------------------------------------------------------------------------
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it eq
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beq.n #-2048
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it ne
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bne.n #-2046
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@ CHECK: it eq @ encoding: [0x08,0xbf]
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@ CHECK: beq #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: it ne @ encoding: [0x18,0xbf]
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@ CHECK: bne #-2046 @ encoding: [0x01,0xe4]
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@------------------------------------------------------------------------------
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@ unconditional branches with wide suffix in IT block
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@------------------------------------------------------------------------------
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it gt
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bgt.w #-2048
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it le
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ble.w #2046
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it ge
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bge.w #-1677216
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it lt
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blt.w #1677214
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@ CHECK: it gt @ encoding: [0xc8,0xbf]
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@ CHECK: bgt.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
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@ CHECK: it le @ encoding: [0xd8,0xbf]
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@ CHECK: ble.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
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@ CHECK: it ge @ encoding: [0xa8,0xbf]
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@ CHECK: bge.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: it lt @ encoding: [0xb8,0xbf]
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@ CHECK: blt.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ conditional branches accept narrow suffix and encode to short encodings
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@------------------------------------------------------------------------------
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beq.n #-256
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bne.n #254
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@ CHECK: beq #-256 @ encoding: [0x80,0xd0]
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@ CHECK: bne #254 @ encoding: [0x7f,0xd1]
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@------------------------------------------------------------------------------
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@ unconditional branches accept wide suffix and encode to wide encodings
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@------------------------------------------------------------------------------
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bl.w #256
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it ne
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blne.w #256
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bmi.w #-256
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bne.w #254
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blt.w #-1048576
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bge.w #1048574
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@ CHECK: bl #256 @ encoding: [0x00,0xf0,0x80,0xf8]
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@ CHECK: it ne @ encoding: [0x18,0xbf]
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@ CHECK: blne #256 @ encoding: [0x00,0xf0,0x80,0xf8]
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@ CHECK: bmi.w #-256 @ encoding: [0x3f,0xf5,0x80,0xaf]
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@ CHECK: bne.w #254 @ encoding: [0x40,0xf0,0x7f,0x80]
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@ CHECK: blt.w #-1048576 @ encoding: [0xc0,0xf6,0x00,0x80]
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@ CHECK: bge.w #1048574 @ encoding: [0xbf,0xf2,0xff,0xaf]
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@------------------------------------------------------------------------------
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@ unconditional branches without width suffix encode depending of offset size
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@------------------------------------------------------------------------------
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bne #-256
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bgt #254
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bne #-258
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bgt #256
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bne #-1048576
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bgt #1048574
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@ CHECK: bne #-256 @ encoding: [0x80,0xd1]
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@ CHECK: bgt #254 @ encoding: [0x7f,0xdc]
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@ CHECK: bne.w #-258 @ encoding: [0x7f,0xf4,0x7f,0xaf]
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@ CHECK: bgt.w #256 @ encoding: [0x00,0xf3,0x80,0x80]
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@ CHECK: bne.w #-1048576 @ encoding: [0x40,0xf4,0x00,0x80]
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@ CHECK: bgt.w #1048574 @ encoding: [0x3f,0xf3,0xff,0xaf]
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@------------------------------------------------------------------------------
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@ same branch insturction encoding to conditional or unconditional depending
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@ on whether it is in an IT block or not
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@------------------------------------------------------------------------------
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it eq
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addeq r0, r1
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bne #128
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@ CHECK: it eq @ encoding: [0x08,0xbf]
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@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
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@ CHECK: bne #128 @ encoding: [0x40,0xd1]
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ite eq
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addeq r0, r1
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bne #128
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@ CHECK: ite eq @ encoding: [0x0c,0xbf]
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@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
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@ CHECK: bne #128 @ encoding: [0x40,0xe0]
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@ RUN: llvm-mc -triple=thumbv7-apple-darwin -mcpu=cortex-a8 -show-encoding < %s | FileCheck %s
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@------------------------------------------------------------------------------
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@ unconditional branches accept narrow suffix and encode to short encodings
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@------------------------------------------------------------------------------
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b.n #-2048
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b.n #2046
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@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: b #2046 @ encoding: [0xff,0xe3]
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@------------------------------------------------------------------------------
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@ unconditional branches accept wide suffix and encode to wide encodings
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@------------------------------------------------------------------------------
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b.w #-2048
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b.w #2046
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b.w #-1677216
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b.w #1677214
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@ CHECK: b.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
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@ CHECK: b.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
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@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ unconditional branches without width suffix encode depending of offset size
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@------------------------------------------------------------------------------
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b #-2048
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b #2046
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b #-2050
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b #2048
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b #-1677216
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b #1677214
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@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: b #2046 @ encoding: [0xff,0xe3]
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@ CHECK: b.w #-2050 @ encoding: [0xff,0xf7,0xff,0xbb]
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@ CHECK: b.w #2048 @ encoding: [0x00,0xf0,0x00,0xbc]
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@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ unconditional branches with width narrow suffix in IT block
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@------------------------------------------------------------------------------
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it eq
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beq.n #-2048
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it ne
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bne.n #-2046
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@ CHECK: it eq @ encoding: [0x08,0xbf]
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@ CHECK: beq #-2048 @ encoding: [0x00,0xe4]
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@ CHECK: it ne @ encoding: [0x18,0xbf]
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@ CHECK: bne #-2046 @ encoding: [0x01,0xe4]
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@------------------------------------------------------------------------------
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@ unconditional branches with wide suffix in IT block
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@------------------------------------------------------------------------------
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it gt
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bgt.w #-2048
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it le
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ble.w #2046
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it ge
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bge.w #-1677216
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it lt
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blt.w #1677214
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@ CHECK: it gt @ encoding: [0xc8,0xbf]
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@ CHECK: bgt.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
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@ CHECK: it le @ encoding: [0xd8,0xbf]
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@ CHECK: ble.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
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@ CHECK: it ge @ encoding: [0xa8,0xbf]
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@ CHECK: bge.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
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@ CHECK: it lt @ encoding: [0xb8,0xbf]
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@ CHECK: blt.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
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@------------------------------------------------------------------------------
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@ conditional branches accept narrow suffix and encode to short encodings
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@------------------------------------------------------------------------------
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beq.n #-256
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bne.n #254
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@ CHECK: beq #-256 @ encoding: [0x80,0xd0]
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@ CHECK: bne #254 @ encoding: [0x7f,0xd1]
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@------------------------------------------------------------------------------
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@ unconditional branches accept wide suffix and encode to wide encodings
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@------------------------------------------------------------------------------
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bmi.w #-256
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bne.w #254
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blt.w #-1048576
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bge.w #1048574
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@ CHECK: bmi.w #-256 @ encoding: [0x3f,0xf5,0x80,0xaf]
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@ CHECK: bne.w #254 @ encoding: [0x40,0xf0,0x7f,0x80]
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@ CHECK: blt.w #-1048576 @ encoding: [0xc0,0xf6,0x00,0x80]
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@ CHECK: bge.w #1048574 @ encoding: [0xbf,0xf2,0xff,0xaf]
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@------------------------------------------------------------------------------
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@ unconditional branches without width suffix encode depending of offset size
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@------------------------------------------------------------------------------
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bne #-256
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bgt #254
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bne #-258
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bgt #256
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bne #-1048576
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bgt #1048574
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@ CHECK: bne #-256 @ encoding: [0x80,0xd1]
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@ CHECK: bgt #254 @ encoding: [0x7f,0xdc]
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@ CHECK: bne.w #-258 @ encoding: [0x7f,0xf4,0x7f,0xaf]
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@ CHECK: bgt.w #256 @ encoding: [0x00,0xf3,0x80,0x80]
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@ CHECK: bne.w #-1048576 @ encoding: [0x40,0xf4,0x00,0x80]
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@ CHECK: bgt.w #1048574 @ encoding: [0x3f,0xf3,0xff,0xaf]
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@------------------------------------------------------------------------------
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@ same branch insturction encoding to conditional or unconditional depending
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@ on whether it is in an IT block or not
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@------------------------------------------------------------------------------
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it eq
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addeq r0, r1
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bne #128
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@ CHECK: it eq @ encoding: [0x08,0xbf]
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@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
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@ CHECK: bne #128 @ encoding: [0x40,0xd1]
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ite eq
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addeq r0, r1
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bne #128
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@ CHECK: ite eq @ encoding: [0x0c,0xbf]
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@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
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@ CHECK: bne #128 @ encoding: [0x40,0xe0]
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@------------------------------------------------------------------------------
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@ Branch targets destined for ARM mode must == 0 (mod 4), otherwise (mod 2).
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@------------------------------------------------------------------------------
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b #2
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bl #2
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beq #2
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cbz r0, #2
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@ N.b. destination is "align(PC, 4) + imm" so imm is still 4-byte
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@ aligned even though current PC may not and destination must be.
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blx #4
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@ CHECK: b #2 @ encoding: [0x01,0xe0]
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@ CHECK: bl #2 @ encoding: [0x00,0xf0,0x01,0xf8]
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@ CHECK: beq #2 @ encoding: [0x01,0xd0]
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@ CHECK: cbz r0, #2 @ encoding: [0x08,0xb1]
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@ CHECK: blx #4 @ encoding: [0x00,0xf0,0x02,0xe8]
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