diff --git a/llvm/test/CodeGen/Mips/fabs.ll b/llvm/test/CodeGen/Mips/fabs.ll
index 49d8a72..ce1a9a6 100644
--- a/llvm/test/CodeGen/Mips/fabs.ll
+++ b/llvm/test/CodeGen/Mips/fabs.ll
@@ -1,21 +1,23 @@
-; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 | FileCheck %s -check-prefix=32
-; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32r2 | FileCheck %s -check-prefix=32R2
-; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64 -mattr=n64 | FileCheck %s -check-prefix=64
-; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64r2 -mattr=n64 | FileCheck %s -check-prefix=64R2
-; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 -enable-no-nans-fp-math | FileCheck %s -check-prefix=NO-NAN
+; Check that abs.[ds] is selected and does not depend on -enable-no-nans-fp-math
+; They obey the Has2008 and ABS2008 configuration bits which govern the
+; conformance to IEEE 754 (1985) and IEEE 754 (2008). When these bits are not
+; present, they confirm to 1985.
+; In 1985 mode, abs.[ds] are arithmetic (i.e. they raise invalid operation
+; exceptions when given NaN's). In 2008 mode, they are non-arithmetic (i.e.
+; they are copies and don't raise any exceptions).
+
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 | FileCheck %s
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32r2 | FileCheck %s
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 -enable-no-nans-fp-math | FileCheck %s
+
+; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64 | FileCheck %s
+; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64 -enable-no-nans-fp-math | FileCheck %s
 
 define float @foo0(float %a) nounwind readnone {
 entry:
 
-; 32: lui  $[[T0:[0-9]+]], 32767
-; 32: ori  $[[MSK0:[0-9]+]], $[[T0]], 65535
-; 32: and  $[[AND:[0-9]+]], ${{[0-9]+}}, $[[MSK0]]
-; 32: mtc1 $[[AND]], $f0
-
-; 32R2: ins  $[[INS:[0-9]+]], $zero, 31, 1
-; 32R2: mtc1 $[[INS]], $f0
-
-; NO-NAN: abs.s
+; CHECK-LABEL: foo0
+; CHECK: abs.s
 
   %call = tail call float @fabsf(float %a) nounwind readnone
   ret float %call
@@ -26,24 +28,8 @@
 define double @foo1(double %a) nounwind readnone {
 entry:
 
-; 32: lui  $[[T0:[0-9]+]], 32767
-; 32: ori  $[[MSK0:[0-9]+]], $[[T0]], 65535
-; 32: and  $[[AND:[0-9]+]], ${{[0-9]+}}, $[[MSK0]]
-; 32: mtc1 $[[AND]], $f1
-
-; 32R2: ins  $[[INS:[0-9]+]], $zero, 31, 1
-; 32R2: mtc1 $[[INS]], $f1
-
-; 64: daddiu  $[[T0:[0-9]+]], $zero, 1
-; 64: dsll    $[[T1:[0-9]+]], ${{[0-9]+}}, 63
-; 64: daddiu  $[[MSK0:[0-9]+]], $[[T1]], -1
-; 64: and     $[[AND:[0-9]+]], ${{[0-9]+}}, $[[MSK0]]
-; 64: dmtc1   $[[AND]], $f0
-
-; 64R2: dins  $[[INS:[0-9]+]], $zero, 63, 1
-; 64R2: dmtc1 $[[INS]], $f0
-
-; NO-NAN: abs.d
+; CHECK-LABEL: foo1:
+; CHECK: abs.d
 
   %call = tail call double @fabs(double %a) nounwind readnone
   ret double %call
diff --git a/llvm/test/CodeGen/Mips/fmadd1.ll b/llvm/test/CodeGen/Mips/fmadd1.ll
index 6768ed6..a9a8e21 100644
--- a/llvm/test/CodeGen/Mips/fmadd1.ll
+++ b/llvm/test/CodeGen/Mips/fmadd1.ll
@@ -1,3 +1,10 @@
+; Check that madd.[ds], msub.[ds], nmadd.[ds], and nmsub.[ds] are supported
+; correctly.
+; The spec for nmadd.[ds], and nmsub.[ds] does not state that they obey the
+; the Has2008 and ABS2008 configuration bits which govern the conformance to
+; IEEE 754 (1985) and IEEE 754 (2008). These instructions are therefore only
+; available when -enable-no-nans-fp-math is given.
+
 ; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -enable-no-nans-fp-math | FileCheck %s -check-prefix=32R2 -check-prefix=CHECK
 ; RUN: llc < %s -march=mips64el -mcpu=mips64r2 -mattr=n64 -enable-no-nans-fp-math | FileCheck %s -check-prefix=64R2 -check-prefix=CHECK
 ; RUN: llc < %s -march=mipsel -mcpu=mips32r2 | FileCheck %s -check-prefix=32R2NAN -check-prefix=CHECK
@@ -5,6 +12,7 @@
 
 define float @FOO0float(float %a, float %b, float %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO0float:
 ; CHECK: madd.s 
   %mul = fmul float %a, %b
   %add = fadd float %mul, %c
@@ -14,6 +22,7 @@
 
 define float @FOO1float(float %a, float %b, float %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO1float:
 ; CHECK: msub.s 
   %mul = fmul float %a, %b
   %sub = fsub float %mul, %c
@@ -23,6 +32,7 @@
 
 define float @FOO2float(float %a, float %b, float %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO2float:
 ; 32R2: nmadd.s 
 ; 64R2: nmadd.s 
 ; 32R2NAN: madd.s 
@@ -35,6 +45,7 @@
 
 define float @FOO3float(float %a, float %b, float %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO3float:
 ; 32R2: nmsub.s 
 ; 64R2: nmsub.s 
 ; 32R2NAN: msub.s 
@@ -47,6 +58,7 @@
 
 define double @FOO10double(double %a, double %b, double %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO10double:
 ; CHECK: madd.d
   %mul = fmul double %a, %b
   %add = fadd double %mul, %c
@@ -56,6 +68,7 @@
 
 define double @FOO11double(double %a, double %b, double %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO11double:
 ; CHECK: msub.d
   %mul = fmul double %a, %b
   %sub = fsub double %mul, %c
@@ -65,6 +78,7 @@
 
 define double @FOO12double(double %a, double %b, double %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO12double:
 ; 32R2: nmadd.d 
 ; 64R2: nmadd.d 
 ; 32R2NAN: madd.d 
@@ -77,6 +91,7 @@
 
 define double @FOO13double(double %a, double %b, double %c) nounwind readnone {
 entry:
+; CHECK-LABEL: FOO13double:
 ; 32R2: nmsub.d 
 ; 64R2: nmsub.d 
 ; 32R2NAN: msub.d 
diff --git a/llvm/test/CodeGen/Mips/fneg.ll b/llvm/test/CodeGen/Mips/fneg.ll
index b322abda..4fb80fd 100644
--- a/llvm/test/CodeGen/Mips/fneg.ll
+++ b/llvm/test/CodeGen/Mips/fneg.ll
@@ -1,17 +1,30 @@
-; RUN: llc  < %s -march=mipsel -mcpu=mips32 | FileCheck %s 
+; Check that abs.[ds] is selected and does not depend on -enable-no-nans-fp-math
+; They obey the Has2008 and ABS2008 configuration bits which govern the
+; conformance to IEEE 754 (1985) and IEEE 754 (2008). When these bits are not
+; present, they confirm to 1985.
+; In 1985 mode, abs.[ds] are arithmetic (i.e. they raise invalid operation
+; exceptions when given NaN's). In 2008 mode, they are non-arithmetic (i.e.
+; they are copies and don't raise any exceptions).
 
-define float @foo0(i32 %a, float %d) nounwind readnone {
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 | FileCheck %s
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32r2 | FileCheck %s
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -mcpu=mips32 -enable-no-nans-fp-math | FileCheck %s
+
+; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64 | FileCheck %s
+; RUN: llc  < %s -mtriple=mips64el-linux-gnu -mcpu=mips64 -enable-no-nans-fp-math | FileCheck %s
+
+define float @foo0(float %d) nounwind readnone {
 entry:
-; CHECK-NOT: neg.s
+; CHECK-LABEL: foo0:
+; CHECK: neg.s
   %sub = fsub float -0.000000e+00, %d
   ret float %sub
 }
 
-define double @foo1(i32 %a, double %d) nounwind readnone {
+define double @foo1(double %d) nounwind readnone {
 entry:
-; CHECK:     foo1
-; CHECK-NOT: neg.d
-; CHECK:     jr
+; CHECK-LABEL: foo1:
+; CHECK: neg.d
   %sub = fsub double -0.000000e+00, %d
   ret double %sub
 }