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Add encodings for CPU flags instructions.

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Branch on flags: brif, brff,
Compare integers to flags: ifcmp
Compare floats to flags: ffcmp
Convert flags to b1: trueif, trueff
This commit is contained in:
Jakob Stoklund Olesen
2017-10-13 16:44:34 -07:00
parent 0f4f663584
commit 5d065c4d8f
7 changed files with 430 additions and 9 deletions
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58
cranelift/filetests/isa/intel/binary32.cton
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@@ -421,3 +421,61 @@ ebb0:
ebb1:
return
}
; CPU flag instructions.
function %cpu_flags() {
ebb0:
[-,%rcx] v1 = iconst.i32 1
[-,%rsi] v2 = iconst.i32 2
jump ebb1
ebb1:
; asm: cmpl %esi, %ecx
[-,%eflags] v10 = ifcmp v1, v2 ; bin: 39 f1
; asm: cmpl %ecx, %esi
[-,%eflags] v11 = ifcmp v2, v1 ; bin: 39 ce
; asm: je ebb1
brif eq v11, ebb1 ; bin: 74 fa
; asm: jne ebb1
brif ne v11, ebb1 ; bin: 75 f8
; asm: jl ebb1
brif slt v11, ebb1 ; bin: 7c f6
; asm: jge ebb1
brif sge v11, ebb1 ; bin: 7d f4
; asm: jg ebb1
brif sgt v11, ebb1 ; bin: 7f f2
; asm: jle ebb1
brif sle v11, ebb1 ; bin: 7e f0
; asm: jb ebb1
brif ult v11, ebb1 ; bin: 72 ee
; asm: jae ebb1
brif uge v11, ebb1 ; bin: 73 ec
; asm: ja ebb1
brif ugt v11, ebb1 ; bin: 77 ea
; asm: jbe ebb1
brif ule v11, ebb1 ; bin: 76 e8
; asm: sete %bl
[-,%rbx] v20 = trueif eq v11 ; bin: 0f 94 c3
; asm: setne %bl
[-,%rbx] v21 = trueif ne v11 ; bin: 0f 95 c3
; asm: setl %dl
[-,%rdx] v22 = trueif slt v11 ; bin: 0f 9c c2
; asm: setge %dl
[-,%rdx] v23 = trueif sge v11 ; bin: 0f 9d c2
; asm: setg %bl
[-,%rbx] v24 = trueif sgt v11 ; bin: 0f 9f c3
; asm: setle %bl
[-,%rbx] v25 = trueif sle v11 ; bin: 0f 9e c3
; asm: setb %dl
[-,%rdx] v26 = trueif ult v11 ; bin: 0f 92 c2
; asm: setae %dl
[-,%rdx] v27 = trueif uge v11 ; bin: 0f 93 c2
; asm: seta %bl
[-,%rbx] v28 = trueif ugt v11 ; bin: 0f 97 c3
; asm: setbe %bl
[-,%rbx] v29 = trueif ule v11 ; bin: 0f 96 c3
return
}