Sparc back-end. Repair of incorrect floating-point condition encodings.

[lero_chris]

Summary

The encodings for floating point conditions A(lways) and N(ever) are in the wrong order, per Sparc manual v8 page 121. This change corrects that mistake.

[jyknight]

...Wow. At least it was only backwards in the assembly parser! I've added some test cases and will commit, thanks!

llvm/trunk/lib/Target/Sparc/SparcInstrAliases.td

 defm : int_cond_alias<"geu",  0b1101>; // same as cc
 defm : int_cond_alias<"cs",   0b0101>;
 defm : int_cond_alias<"lu",   0b0101>; // same as cs
 defm : int_cond_alias<"pos",  0b1110>;
 defm : int_cond_alias<"neg",  0b0110>;
 defm : int_cond_alias<"vc",   0b1111>;
 defm : int_cond_alias<"vs",   0b0111>;
 
-defm : fp_cond_alias<"a",     0b0000>;
-defm : fp_cond_alias<"",      0b0000>; // same as a; gnu asm, not in manual
-defm : fp_cond_alias<"n",     0b1000>;
+defm : fp_cond_alias<"a",     0b1000>;
+defm : fp_cond_alias<"",      0b1000>; // same as a; gnu asm, not in manual
+defm : fp_cond_alias<"n",     0b0000>;
 defm : fp_cond_alias<"u",     0b0111>;
 defm : fp_cond_alias<"g",     0b0110>;
 defm : fp_cond_alias<"ug",    0b0101>;
 defm : fp_cond_alias<"l",     0b0100>;
 defm : fp_cond_alias<"ul",    0b0011>;
 defm : fp_cond_alias<"lg",    0b0010>;
 defm : fp_cond_alias<"ne",    0b0001>;
 defm : fp_cond_alias<"nz",    0b0001>; // same as ne

llvm/trunk/test/MC/Sparc/sparc-ctrl-instructions.s

! RUN: llvm-mc %s -arch=sparcv9 -show-encoding | FileCheck %s
         ! CHECK: bvc .BB0      ! encoding: [0x1e,0b10AAAAAA,A,A]
         ! CHECK-NEXT:         ! fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         bvc .BB0
 
         ! CHECK: bvs .BB0      ! encoding: [0x0e,0b10AAAAAA,A,A]
         ! CHECK-NEXT:         ! fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         bvs .BB0
 
+        ! CHECK:             fba .BB0                        ! encoding: [0x11,0b10AAAAAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
+        fba .BB0
+
+        ! CHECK:             fba .BB0                        ! encoding: [0x11,0b10AAAAAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
+        fb .BB0
+
+        ! CHECK:             fbn .BB0                        ! encoding: [0x01,0b10AAAAAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
+        fbn .BB0
+
         ! CHECK:             fbu .BB0                        ! encoding: [0x0f,0b10AAAAAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         fbu .BB0
 
         ! CHECK:             fbg .BB0                        ! encoding: [0x0d,0b10AAAAAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         fbg .BB0
+
         ! CHECK:             fbug .BB0                       ! encoding: [0x0b,0b10AAAAAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         fbug .BB0
 
         ! CHECK:             fbl .BB0                        ! encoding: [0x09,0b10AAAAAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br22
         fbl .BB0
 

llvm/trunk/test/MC/Sparc/sparc64-ctrl-instructions.s

! RUN: llvm-mc %s -triple=sparc64-unknown-linux-gnu -show-encoding | FileCheck %s
         ! CHECK: bcs,a %xcc, .BB0      ! encoding: [0x2a,0b01101AAA,A,A]
         ! CHECK-NEXT:         ! fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
         bcs,a,pt %xcc, .BB0
 
         ! CHECK: bpos,a %xcc, .BB0      ! encoding: [0x3c,0b01101AAA,A,A]
         ! CHECK-NEXT:         ! fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
         bpos,a,pt %xcc, .BB0
 
+        ! CHECK:             fba %fcc0, .BB0                        ! encoding: [0x11,0b01001AAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
+        fba %fcc0, .BB0
+
+        ! CHECK:             fba %fcc0, .BB0                        ! encoding: [0x11,0b01001AAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
+        fb %fcc0, .BB0
+
+        ! CHECK:             fbn %fcc0, .BB0                        ! encoding: [0x01,0b01001AAA,A,A]
+        ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
+        fbn %fcc0, .BB0
+
         ! CHECK:             fbu %fcc0, .BB0                      ! encoding: [0x0f,0b01001AAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
         fbu %fcc0, .BB0
 
         ! CHECK:             fbg %fcc0, .BB0                      ! encoding: [0x0d,0b01001AAA,A,A]
         ! CHECK-NEXT:                                        !   fixup A - offset: 0, value: .BB0, kind: fixup_sparc_br19
         fbg %fcc0, .BB0
         ! CHECK:             fbug %fcc0, .BB0                     ! encoding: [0x0b,0b01001AAA,A,A]