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Use EBB offsets for encoding RISC-V branches.

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Stop emitting EBB relocations. Use the offsets computed by
relax_branches() to encode the correct displacements immediately.
This commit is contained in:
Jakob Stoklund Olesen
2017-04-06 11:18:38 -07:00
parent 8a3f538441
commit 856a67ca3a
2 changed files with 49 additions and 20 deletions
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45
cranelift/filetests/isa/riscv/binary32.cton
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@@ -80,23 +80,40 @@ ebb0:
; Control Transfer Instructions
ebb1:
; beq
br_icmp eq, v1, v2, ebb0 ; bin: Branch(ebb0) 01550063
; bne
br_icmp ne, v1, v2, ebb0 ; bin: Branch(ebb0) 01551063
; blt
br_icmp slt, v1, v2, ebb0 ; bin: Branch(ebb0) 01554063
; bge
br_icmp sge, v1, v2, ebb0 ; bin: Branch(ebb0) 01555063
; bltu
br_icmp ult, v1, v2, ebb0 ; bin: Branch(ebb0) 01556063
; bgeu
br_icmp uge, v1, v2, ebb0 ; bin: Branch(ebb0) 01557063
; beq 0x000
br_icmp eq, v1, v2, ebb1 ; bin: 01550063
; bne 0xffc
br_icmp ne, v1, v2, ebb1 ; bin: ff551ee3
; blt 0xff8
br_icmp slt, v1, v2, ebb1 ; bin: ff554ce3
; bge 0xff4
br_icmp sge, v1, v2, ebb1 ; bin: ff555ae3
; bltu 0xff0
br_icmp ult, v1, v2, ebb1 ; bin: ff5568e3
; bgeu 0xfec
br_icmp uge, v1, v2, ebb1 ; bin: ff5576e3
; Forward branches.
; beq 0x018
br_icmp eq, v2, v1, ebb2 ; bin: 00aa8c63
; bne 0x014
br_icmp ne, v2, v1, ebb2 ; bin: 00aa9a63
; blt 0x010
br_icmp slt, v2, v1, ebb2 ; bin: 00aac863
; bge 0x00c
br_icmp sge, v2, v1, ebb2 ; bin: 00aad663
; bltu 0x008
br_icmp ult, v2, v1, ebb2 ; bin: 00aae463
; bgeu 0x004
br_icmp uge, v2, v1, ebb2 ; bin: 00aaf263
jump ebb2
ebb2:
; beq x, %x0
brz v1, ebb0 ; bin: Branch(ebb0) 00050063
brz v1, ebb2 ; bin: 00050063
; bne x, %x0
brnz v1, ebb0 ; bin: Branch(ebb0) 00051063
brnz v1, ebb2 ; bin: fe051ee3
return
}