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Infer REX prefixes for SIMD load and store with displacement

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This commit is contained in:
Andrew Brown
2020-04-01 10:06:12 -07:00
parent dc874a5b3b
commit e425bfcebd
4 changed files with 44 additions and 10 deletions
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25
cranelift/filetests/filetests/isa/x86/simd-memory-binemit.clif
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@@ -7,10 +7,6 @@ block0(v0: i64 [%rax]):
[-, %xmm0] v10 = load.i32x4 v0 ; bin: heap_oob 0f 10 00
[-] store v10, v0 ; bin: heap_oob 0f 11 00
; use displacement
[-, %xmm0] v11 = load.f32x4 v0+42 ; bin: heap_oob 40 0f 10 40 2a
[-] store v11, v0+42 ; bin: heap_oob 40 0f 11 40 2a
; use REX prefix
[-, %xmm8] v12 = load.i8x16 v0 ; bin: heap_oob 44 0f 10 00
[-] store v12, v0 ; bin: heap_oob 44 0f 11 00
@@ -18,6 +14,27 @@ block0(v0: i64 [%rax]):
return
}
function %load_store_with_displacement(i64) {
block0(v0: i64 [%rax]):
; use 8-bit displacement
[-, %xmm0] v1 = load.f32x4 v0+42 ; bin: heap_oob 0f 10 40 2a
[-] store v1, v0+42 ; bin: heap_oob 0f 11 40 2a
; use 8-bit displacement with REX prefix
[-, %xmm8] v2 = load.i8x16 v0 ; bin: heap_oob 44 0f 10 00
[-] store v2, v0 ; bin: heap_oob 44 0f 11 00
; use 32-bit displacement
[-, %xmm0] v3 = load.f32x4 v0+256 ; bin: heap_oob 0f 10 80 00000100
[-] store v3, v0+256 ; bin: heap_oob 0f 11 80 00000100
; use 32-bit displacement with REX prefix
[-, %xmm8] v4 = load.f32x4 v0+256 ; bin: heap_oob 44 0f 10 80 00000100
[-] store v4, v0+256 ; bin: heap_oob 44 0f 11 80 00000100
return
}
function %load_store_complex(i64, i64) {
block0(v0: i64 [%rax], v1: i64 [%rbx]):
; %xmm1 corresponds to ModR/M 0x04; the 0b100 in the R/M slot indicates a SIB byte follows