mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 04:52:54 +02:00
b2bffb2bad
Immediate branch targets aren't commonly used, but if they are we should make sure they can actually be encoded. This means they must be divisible by 2 when targeting Thumb mode, and by 4 when targeting ARM mode. Also do a little naming cleanup while I was changing everything around anyway. llvm-svn: 275116
305 lines
12 KiB
ArmAsm
305 lines
12 KiB
ArmAsm
@ RUN: llvm-mc -triple=thumbv7-apple-darwin -mcpu=cortex-a8 -show-encoding < %s | FileCheck %s
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept narrow suffix and encode to short encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
b.n #-2048
|
|
b.n #2046
|
|
|
|
@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: b #2046 @ encoding: [0xff,0xe3]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept wide suffix and encode to wide encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
b.w #-2048
|
|
b.w #2046
|
|
b.w #-1677216
|
|
b.w #1677214
|
|
|
|
@ CHECK: b.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
|
|
@ CHECK: b.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
|
|
@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches without width suffix encode depending of offset size
|
|
@------------------------------------------------------------------------------
|
|
|
|
b #-2048
|
|
b #2046
|
|
b #-2050
|
|
b #2048
|
|
b #-1677216
|
|
b #1677214
|
|
|
|
@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: b #2046 @ encoding: [0xff,0xe3]
|
|
@ CHECK: b.w #-2050 @ encoding: [0xff,0xf7,0xff,0xbb]
|
|
@ CHECK: b.w #2048 @ encoding: [0x00,0xf0,0x00,0xbc]
|
|
@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches with width narrow suffix in IT block
|
|
@------------------------------------------------------------------------------
|
|
|
|
it eq
|
|
beq.n #-2048
|
|
it ne
|
|
bne.n #-2046
|
|
|
|
@ CHECK: it eq @ encoding: [0x08,0xbf]
|
|
@ CHECK: beq #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: it ne @ encoding: [0x18,0xbf]
|
|
@ CHECK: bne #-2046 @ encoding: [0x01,0xe4]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches with wide suffix in IT block
|
|
@------------------------------------------------------------------------------
|
|
|
|
it gt
|
|
bgt.w #-2048
|
|
it le
|
|
ble.w #2046
|
|
it ge
|
|
bge.w #-1677216
|
|
it lt
|
|
blt.w #1677214
|
|
|
|
@ CHECK: it gt @ encoding: [0xc8,0xbf]
|
|
@ CHECK: bgt.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
|
|
@ CHECK: it le @ encoding: [0xd8,0xbf]
|
|
@ CHECK: ble.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
|
|
@ CHECK: it ge @ encoding: [0xa8,0xbf]
|
|
@ CHECK: bge.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: it lt @ encoding: [0xb8,0xbf]
|
|
@ CHECK: blt.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ conditional branches accept narrow suffix and encode to short encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
beq.n #-256
|
|
bne.n #254
|
|
|
|
@ CHECK: beq #-256 @ encoding: [0x80,0xd0]
|
|
@ CHECK: bne #254 @ encoding: [0x7f,0xd1]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept wide suffix and encode to wide encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
bmi.w #-256
|
|
bne.w #254
|
|
blt.w #-1048576
|
|
bge.w #1048574
|
|
|
|
@ CHECK: bmi.w #-256 @ encoding: [0x3f,0xf5,0x80,0xaf]
|
|
@ CHECK: bne.w #254 @ encoding: [0x40,0xf0,0x7f,0x80]
|
|
@ CHECK: blt.w #-1048576 @ encoding: [0xc0,0xf6,0x00,0x80]
|
|
@ CHECK: bge.w #1048574 @ encoding: [0xbf,0xf2,0xff,0xaf]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches without width suffix encode depending of offset size
|
|
@------------------------------------------------------------------------------
|
|
|
|
bne #-256
|
|
bgt #254
|
|
bne #-258
|
|
bgt #256
|
|
bne #-1048576
|
|
bgt #1048574
|
|
|
|
@ CHECK: bne #-256 @ encoding: [0x80,0xd1]
|
|
@ CHECK: bgt #254 @ encoding: [0x7f,0xdc]
|
|
@ CHECK: bne.w #-258 @ encoding: [0x7f,0xf4,0x7f,0xaf]
|
|
@ CHECK: bgt.w #256 @ encoding: [0x00,0xf3,0x80,0x80]
|
|
@ CHECK: bne.w #-1048576 @ encoding: [0x40,0xf4,0x00,0x80]
|
|
@ CHECK: bgt.w #1048574 @ encoding: [0x3f,0xf3,0xff,0xaf]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ same branch insturction encoding to conditional or unconditional depending
|
|
@ on whether it is in an IT block or not
|
|
@------------------------------------------------------------------------------
|
|
|
|
it eq
|
|
addeq r0, r1
|
|
bne #128
|
|
|
|
@ CHECK: it eq @ encoding: [0x08,0xbf]
|
|
@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
|
|
@ CHECK: bne #128 @ encoding: [0x40,0xd1]
|
|
|
|
ite eq
|
|
addeq r0, r1
|
|
bne #128
|
|
|
|
@ CHECK: ite eq @ encoding: [0x0c,0xbf]
|
|
@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
|
|
@ CHECK: bne #128 @ encoding: [0x40,0xe0]
|
|
|
|
@ RUN: llvm-mc -triple=thumbv7-apple-darwin -mcpu=cortex-a8 -show-encoding < %s | FileCheck %s
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept narrow suffix and encode to short encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
b.n #-2048
|
|
b.n #2046
|
|
|
|
@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: b #2046 @ encoding: [0xff,0xe3]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept wide suffix and encode to wide encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
b.w #-2048
|
|
b.w #2046
|
|
b.w #-1677216
|
|
b.w #1677214
|
|
|
|
@ CHECK: b.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
|
|
@ CHECK: b.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
|
|
@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches without width suffix encode depending of offset size
|
|
@------------------------------------------------------------------------------
|
|
|
|
b #-2048
|
|
b #2046
|
|
b #-2050
|
|
b #2048
|
|
b #-1677216
|
|
b #1677214
|
|
|
|
@ CHECK: b #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: b #2046 @ encoding: [0xff,0xe3]
|
|
@ CHECK: b.w #-2050 @ encoding: [0xff,0xf7,0xff,0xbb]
|
|
@ CHECK: b.w #2048 @ encoding: [0x00,0xf0,0x00,0xbc]
|
|
@ CHECK: b.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: b.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches with width narrow suffix in IT block
|
|
@------------------------------------------------------------------------------
|
|
|
|
it eq
|
|
beq.n #-2048
|
|
it ne
|
|
bne.n #-2046
|
|
|
|
@ CHECK: it eq @ encoding: [0x08,0xbf]
|
|
@ CHECK: beq #-2048 @ encoding: [0x00,0xe4]
|
|
@ CHECK: it ne @ encoding: [0x18,0xbf]
|
|
@ CHECK: bne #-2046 @ encoding: [0x01,0xe4]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches with wide suffix in IT block
|
|
@------------------------------------------------------------------------------
|
|
|
|
it gt
|
|
bgt.w #-2048
|
|
it le
|
|
ble.w #2046
|
|
it ge
|
|
bge.w #-1677216
|
|
it lt
|
|
blt.w #1677214
|
|
|
|
@ CHECK: it gt @ encoding: [0xc8,0xbf]
|
|
@ CHECK: bgt.w #-2048 @ encoding: [0xff,0xf7,0x00,0xbc]
|
|
@ CHECK: it le @ encoding: [0xd8,0xbf]
|
|
@ CHECK: ble.w #2046 @ encoding: [0x00,0xf0,0xff,0xbb]
|
|
@ CHECK: it ge @ encoding: [0xa8,0xbf]
|
|
@ CHECK: bge.w #-1677216 @ encoding: [0x66,0xf6,0x30,0xbc]
|
|
@ CHECK: it lt @ encoding: [0xb8,0xbf]
|
|
@ CHECK: blt.w #1677214 @ encoding: [0x99,0xf1,0xcf,0xbb]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ conditional branches accept narrow suffix and encode to short encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
beq.n #-256
|
|
bne.n #254
|
|
|
|
@ CHECK: beq #-256 @ encoding: [0x80,0xd0]
|
|
@ CHECK: bne #254 @ encoding: [0x7f,0xd1]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches accept wide suffix and encode to wide encodings
|
|
@------------------------------------------------------------------------------
|
|
|
|
bmi.w #-256
|
|
bne.w #254
|
|
blt.w #-1048576
|
|
bge.w #1048574
|
|
|
|
@ CHECK: bmi.w #-256 @ encoding: [0x3f,0xf5,0x80,0xaf]
|
|
@ CHECK: bne.w #254 @ encoding: [0x40,0xf0,0x7f,0x80]
|
|
@ CHECK: blt.w #-1048576 @ encoding: [0xc0,0xf6,0x00,0x80]
|
|
@ CHECK: bge.w #1048574 @ encoding: [0xbf,0xf2,0xff,0xaf]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ unconditional branches without width suffix encode depending of offset size
|
|
@------------------------------------------------------------------------------
|
|
|
|
bne #-256
|
|
bgt #254
|
|
bne #-258
|
|
bgt #256
|
|
bne #-1048576
|
|
bgt #1048574
|
|
|
|
@ CHECK: bne #-256 @ encoding: [0x80,0xd1]
|
|
@ CHECK: bgt #254 @ encoding: [0x7f,0xdc]
|
|
@ CHECK: bne.w #-258 @ encoding: [0x7f,0xf4,0x7f,0xaf]
|
|
@ CHECK: bgt.w #256 @ encoding: [0x00,0xf3,0x80,0x80]
|
|
@ CHECK: bne.w #-1048576 @ encoding: [0x40,0xf4,0x00,0x80]
|
|
@ CHECK: bgt.w #1048574 @ encoding: [0x3f,0xf3,0xff,0xaf]
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ same branch insturction encoding to conditional or unconditional depending
|
|
@ on whether it is in an IT block or not
|
|
@------------------------------------------------------------------------------
|
|
|
|
it eq
|
|
addeq r0, r1
|
|
bne #128
|
|
|
|
@ CHECK: it eq @ encoding: [0x08,0xbf]
|
|
@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
|
|
@ CHECK: bne #128 @ encoding: [0x40,0xd1]
|
|
|
|
ite eq
|
|
addeq r0, r1
|
|
bne #128
|
|
|
|
@ CHECK: ite eq @ encoding: [0x0c,0xbf]
|
|
@ CHECK: addeq r0, r1 @ encoding: [0x08,0x44]
|
|
@ CHECK: bne #128 @ encoding: [0x40,0xe0]
|
|
|
|
|
|
@------------------------------------------------------------------------------
|
|
@ Branch targets destined for ARM mode must == 0 (mod 4), otherwise (mod 2).
|
|
@------------------------------------------------------------------------------
|
|
|
|
b #2
|
|
bl #2
|
|
beq #2
|
|
cbz r0, #2
|
|
@ N.b. destination is "align(PC, 4) + imm" so imm is still 4-byte
|
|
@ aligned even though current PC may not and destination must be.
|
|
blx #4
|
|
|
|
@ CHECK: b #2 @ encoding: [0x01,0xe0]
|
|
@ CHECK: bl #2 @ encoding: [0x00,0xf0,0x01,0xf8]
|
|
@ CHECK: beq #2 @ encoding: [0x01,0xd0]
|
|
@ CHECK: cbz r0, #2 @ encoding: [0x08,0xb1]
|
|
@ CHECK: blx #4 @ encoding: [0x00,0xf0,0x02,0xe8]
|