diff --git a/gcc/config/mips/mips-cpus.def b/gcc/config/mips/mips-cpus.def
index b02294be4..45fb6bc8b 100644
--- a/gcc/config/mips/mips-cpus.def
+++ b/gcc/config/mips/mips-cpus.def
@@ -33,146 +33,146 @@ along with GCC; see the file COPYING3.  If not see
    where the arguments are the fields of struct mips_cpu_info.  */
 
 /* Entries for generic ISAs.  */
-MIPS_CPU ("mips1", PROCESSOR_R3000, 1, 0)
-MIPS_CPU ("mips2", PROCESSOR_R6000, 2, PTF_AVOID_BRANCHLIKELY_SIZE)
-MIPS_CPU ("mips3", PROCESSOR_R4000, 3, PTF_AVOID_BRANCHLIKELY_SIZE)
-MIPS_CPU ("mips4", PROCESSOR_R10000, 4, PTF_AVOID_BRANCHLIKELY_SIZE)
+MIPS_CPU ("mips1", PROCESSOR_R3000, MIPS_ISA_MIPS1, 0)
+MIPS_CPU ("mips2", PROCESSOR_R6000, MIPS_ISA_MIPS2, PTF_AVOID_BRANCHLIKELY_SIZE)
+MIPS_CPU ("mips3", PROCESSOR_R4000, MIPS_ISA_MIPS3, PTF_AVOID_BRANCHLIKELY_SIZE)
+MIPS_CPU ("mips4", PROCESSOR_R10000, MIPS_ISA_MIPS4, PTF_AVOID_BRANCHLIKELY_SIZE)
 /* Prefer not to use branch-likely instructions for generic MIPS32rX
    and MIPS64rX code.  The instructions were officially deprecated
    in revisions 2 and earlier, but revision 3 is likely to downgrade
    that to a recommendation to avoid the instructions in code that
    isn't tuned to a specific processor.  */
-MIPS_CPU ("mips32", PROCESSOR_4KC, 32, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips32r2", PROCESSOR_74KF2_1, 33, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips32", PROCESSOR_4KC, MIPS_ISA_MIPS32, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips32r2", PROCESSOR_74KF2_1, MIPS_ISA_MIPS32R2, PTF_AVOID_BRANCHLIKELY_ALWAYS)
 /* mips32r3 is micromips hense why it uses the M4K processor.  */
-MIPS_CPU ("mips32r3", PROCESSOR_M4K, 34, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips32r5", PROCESSOR_P5600, 36, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips32r6", PROCESSOR_I6400, 37, 0)
-MIPS_CPU ("mips64", PROCESSOR_5KC, 64, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips32r3", PROCESSOR_M4K, MIPS_ISA_MIPS32R3, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips32r5", PROCESSOR_P5600, MIPS_ISA_MIPS32R5, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips32r6", PROCESSOR_I6400, MIPS_ISA_MIPS32R6, 0)
+MIPS_CPU ("mips64", PROCESSOR_5KC, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_ALWAYS)
 /* ??? For now just tune the generic MIPS64r2 and above for 5KC as well.   */
-MIPS_CPU ("mips64r2", PROCESSOR_5KC, 65, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips64r3", PROCESSOR_5KC, 66, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips64r5", PROCESSOR_5KC, 68, PTF_AVOID_BRANCHLIKELY_ALWAYS)
-MIPS_CPU ("mips64r6", PROCESSOR_I6400, 69, 0)
+MIPS_CPU ("mips64r2", PROCESSOR_5KC, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips64r3", PROCESSOR_5KC, MIPS_ISA_MIPS64R3, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips64r5", PROCESSOR_5KC, MIPS_ISA_MIPS64R5, PTF_AVOID_BRANCHLIKELY_ALWAYS)
+MIPS_CPU ("mips64r6", PROCESSOR_I6400, MIPS_ISA_MIPS64R6, 0)
 
 /* MIPS I processors.  */
-MIPS_CPU ("r3000", PROCESSOR_R3000, 1, 0)
-MIPS_CPU ("r2000", PROCESSOR_R3000, 1, 0)
-MIPS_CPU ("r3900", PROCESSOR_R3900, 1, 0)
+MIPS_CPU ("r3000", PROCESSOR_R3000, MIPS_ISA_MIPS1, 0)
+MIPS_CPU ("r2000", PROCESSOR_R3000, MIPS_ISA_MIPS1, 0)
+MIPS_CPU ("r3900", PROCESSOR_R3900, MIPS_ISA_MIPS1, 0)
 
 /* MIPS II processors.  */
-MIPS_CPU ("r6000", PROCESSOR_R6000, 2, 0)
+MIPS_CPU ("r6000", PROCESSOR_R6000, MIPS_ISA_MIPS2, 0)
 
 /* MIPS III processors.  */
-MIPS_CPU ("r4000", PROCESSOR_R4000, 3, 0)
-MIPS_CPU ("vr4100", PROCESSOR_R4100, 3, 0)
-MIPS_CPU ("vr4111", PROCESSOR_R4111, 3, 0)
-MIPS_CPU ("vr4120", PROCESSOR_R4120, 3, 0)
-MIPS_CPU ("vr4130", PROCESSOR_R4130, 3, 0)
-MIPS_CPU ("vr4300", PROCESSOR_R4300, 3, 0)
-MIPS_CPU ("r4400", PROCESSOR_R4000, 3, 0)
-MIPS_CPU ("r4600", PROCESSOR_R4600, 3, 0)
-MIPS_CPU ("orion", PROCESSOR_R4600, 3, 0)
-MIPS_CPU ("r4650", PROCESSOR_R4650, 3, 0)
-MIPS_CPU ("r4700", PROCESSOR_R4700, 3, 0)
-MIPS_CPU ("r5900", PROCESSOR_R5900, 3, 0)
+MIPS_CPU ("r4000", PROCESSOR_R4000, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("vr4100", PROCESSOR_R4100, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("vr4111", PROCESSOR_R4111, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("vr4120", PROCESSOR_R4120, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("vr4130", PROCESSOR_R4130, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("vr4300", PROCESSOR_R4300, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("r4400", PROCESSOR_R4000, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("r4600", PROCESSOR_R4600, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("orion", PROCESSOR_R4600, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("r4650", PROCESSOR_R4650, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("r4700", PROCESSOR_R4700, MIPS_ISA_MIPS3, 0)
+MIPS_CPU ("r5900", PROCESSOR_R5900, MIPS_ISA_MIPS3, 0)
 /* ST Loongson 2E/2F processors.  */
-MIPS_CPU ("loongson2e", PROCESSOR_LOONGSON_2E, 3, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("loongson2f", PROCESSOR_LOONGSON_2F, 3, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("loongson2e", PROCESSOR_LOONGSON_2E, MIPS_ISA_MIPS3, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("loongson2f", PROCESSOR_LOONGSON_2F, MIPS_ISA_MIPS3, PTF_AVOID_BRANCHLIKELY_SPEED)
 
 /* MIPS IV processors. */
-MIPS_CPU ("r8000", PROCESSOR_R8000, 4, 0)
-MIPS_CPU ("r10000", PROCESSOR_R10000, 4, 0)
-MIPS_CPU ("r12000", PROCESSOR_R10000, 4, 0)
-MIPS_CPU ("r14000", PROCESSOR_R10000, 4, 0)
-MIPS_CPU ("r16000", PROCESSOR_R10000, 4, 0)
-MIPS_CPU ("vr5000", PROCESSOR_R5000, 4, 0)
-MIPS_CPU ("vr5400", PROCESSOR_R5400, 4, 0)
-MIPS_CPU ("vr5500", PROCESSOR_R5500, 4, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("rm7000", PROCESSOR_R7000, 4, 0)
-MIPS_CPU ("rm9000", PROCESSOR_R9000, 4, 0)
+MIPS_CPU ("r8000", PROCESSOR_R8000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("r10000", PROCESSOR_R10000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("r12000", PROCESSOR_R10000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("r14000", PROCESSOR_R10000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("r16000", PROCESSOR_R10000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("vr5000", PROCESSOR_R5000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("vr5400", PROCESSOR_R5400, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("vr5500", PROCESSOR_R5500, MIPS_ISA_MIPS4, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("rm7000", PROCESSOR_R7000, MIPS_ISA_MIPS4, 0)
+MIPS_CPU ("rm9000", PROCESSOR_R9000, MIPS_ISA_MIPS4, 0)
 
 /* MIPS32 processors.  */
-MIPS_CPU ("4kc", PROCESSOR_4KC, 32, 0)
-MIPS_CPU ("4km", PROCESSOR_4KC, 32, 0)
-MIPS_CPU ("4kp", PROCESSOR_4KP, 32, 0)
-MIPS_CPU ("4ksc", PROCESSOR_4KC, 32, 0)
+MIPS_CPU ("4kc", PROCESSOR_4KC, MIPS_ISA_MIPS32, 0)
+MIPS_CPU ("4km", PROCESSOR_4KC, MIPS_ISA_MIPS32, 0)
+MIPS_CPU ("4kp", PROCESSOR_4KP, MIPS_ISA_MIPS32, 0)
+MIPS_CPU ("4ksc", PROCESSOR_4KC, MIPS_ISA_MIPS32, 0)
 
 /* MIPS32 Release 2 processors.  */
-MIPS_CPU ("m4k", PROCESSOR_M4K, 33, 0)
-MIPS_CPU ("m14kc", PROCESSOR_M4K, 33, 0)
-MIPS_CPU ("m14k", PROCESSOR_M4K, 33, 0)
-MIPS_CPU ("m14ke", PROCESSOR_M4K, 33, 0)
-MIPS_CPU ("m14kec", PROCESSOR_M4K, 33, 0)
-MIPS_CPU ("4kec", PROCESSOR_4KC, 33, 0)
-MIPS_CPU ("4kem", PROCESSOR_4KC, 33, 0)
-MIPS_CPU ("4kep", PROCESSOR_4KP, 33, 0)
-MIPS_CPU ("4ksd", PROCESSOR_4KC, 33, 0)
-
-MIPS_CPU ("24kc", PROCESSOR_24KC, 33, 0)
-MIPS_CPU ("24kf2_1", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("24kf", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("24kf1_1", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("24kfx", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("24kx", PROCESSOR_24KF1_1, 33, 0)
-
-MIPS_CPU ("24kec", PROCESSOR_24KC, 33, 0) /* 24K with DSP.  */
-MIPS_CPU ("24kef2_1", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("24kef", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("24kef1_1", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("24kefx", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("24kex", PROCESSOR_24KF1_1, 33, 0)
-
-MIPS_CPU ("34kc", PROCESSOR_24KC, 33, 0) /* 34K with MT/DSP.  */
-MIPS_CPU ("34kf2_1", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("34kf", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("34kf1_1", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("34kfx", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("34kx", PROCESSOR_24KF1_1, 33, 0)
-MIPS_CPU ("34kn", PROCESSOR_24KC, 33, 0)  /* 34K with MT but no DSP.  */
-
-MIPS_CPU ("74kc", PROCESSOR_74KC, 33, PTF_AVOID_IMADD) /* 74K with DSPr2.  */
-MIPS_CPU ("74kf2_1", PROCESSOR_74KF2_1, 33, PTF_AVOID_IMADD)
-MIPS_CPU ("74kf", PROCESSOR_74KF2_1, 33, PTF_AVOID_IMADD)
-MIPS_CPU ("74kf1_1", PROCESSOR_74KF1_1, 33, PTF_AVOID_IMADD)
-MIPS_CPU ("74kfx", PROCESSOR_74KF1_1, 33, PTF_AVOID_IMADD)
-MIPS_CPU ("74kx", PROCESSOR_74KF1_1, 33, PTF_AVOID_IMADD)
-MIPS_CPU ("74kf3_2", PROCESSOR_74KF3_2, 33, PTF_AVOID_IMADD)
-
-MIPS_CPU ("1004kc", PROCESSOR_24KC, 33, 0) /* 1004K with MT/DSP.  */
-MIPS_CPU ("1004kf2_1", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("1004kf", PROCESSOR_24KF2_1, 33, 0)
-MIPS_CPU ("1004kf1_1", PROCESSOR_24KF1_1, 33, 0)
-
-MIPS_CPU ("interaptiv", PROCESSOR_24KF2_1, 33, 0)
+MIPS_CPU ("m4k", PROCESSOR_M4K, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("m14kc", PROCESSOR_M4K, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("m14k", PROCESSOR_M4K, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("m14ke", PROCESSOR_M4K, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("m14kec", PROCESSOR_M4K, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("4kec", PROCESSOR_4KC, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("4kem", PROCESSOR_4KC, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("4kep", PROCESSOR_4KP, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("4ksd", PROCESSOR_4KC, MIPS_ISA_MIPS32R2, 0)
+
+MIPS_CPU ("24kc", PROCESSOR_24KC, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kf2_1", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kf", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kf1_1", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kfx", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kx", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+
+MIPS_CPU ("24kec", PROCESSOR_24KC, MIPS_ISA_MIPS32R2, 0) /* 24K with DSP.  */
+MIPS_CPU ("24kef2_1", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kef", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kef1_1", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kefx", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("24kex", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+
+MIPS_CPU ("34kc", PROCESSOR_24KC, MIPS_ISA_MIPS32R2, 0) /* 34K with MT/DSP.  */
+MIPS_CPU ("34kf2_1", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("34kf", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("34kf1_1", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("34kfx", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("34kx", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("34kn", PROCESSOR_24KC, MIPS_ISA_MIPS32R2, 0)  /* 34K with MT but no DSP.  */
+
+MIPS_CPU ("74kc", PROCESSOR_74KC, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD) /* 74K with DSPr2.  */
+MIPS_CPU ("74kf2_1", PROCESSOR_74KF2_1, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+MIPS_CPU ("74kf", PROCESSOR_74KF2_1, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+MIPS_CPU ("74kf1_1", PROCESSOR_74KF1_1, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+MIPS_CPU ("74kfx", PROCESSOR_74KF1_1, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+MIPS_CPU ("74kx", PROCESSOR_74KF1_1, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+MIPS_CPU ("74kf3_2", PROCESSOR_74KF3_2, MIPS_ISA_MIPS32R2, PTF_AVOID_IMADD)
+
+MIPS_CPU ("1004kc", PROCESSOR_24KC, MIPS_ISA_MIPS32R2, 0) /* 1004K with MT/DSP.  */
+MIPS_CPU ("1004kf2_1", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("1004kf", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
+MIPS_CPU ("1004kf1_1", PROCESSOR_24KF1_1, MIPS_ISA_MIPS32R2, 0)
+
+MIPS_CPU ("interaptiv", PROCESSOR_24KF2_1, MIPS_ISA_MIPS32R2, 0)
 
 /* MIPS32 Release 5 processors.  */
-MIPS_CPU ("p5600", PROCESSOR_P5600, 36, (PTF_AVOID_BRANCHLIKELY_SPEED
+MIPS_CPU ("p5600", PROCESSOR_P5600, MIPS_ISA_MIPS32R5, (PTF_AVOID_BRANCHLIKELY_SPEED
 					 | PTF_AVOID_IMADD))
-MIPS_CPU ("m5100", PROCESSOR_M5100, 36, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("m5101", PROCESSOR_M5100, 36, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("m5100", PROCESSOR_M5100, MIPS_ISA_MIPS32R5, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("m5101", PROCESSOR_M5100, MIPS_ISA_MIPS32R5, PTF_AVOID_BRANCHLIKELY_SPEED)
 
 /* MIPS64 processors.  */
-MIPS_CPU ("5kc", PROCESSOR_5KC, 64, 0)
-MIPS_CPU ("5kf", PROCESSOR_5KF, 64, 0)
-MIPS_CPU ("20kc", PROCESSOR_20KC, 64, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("sb1", PROCESSOR_SB1, 64, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("sb1a", PROCESSOR_SB1A, 64, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("sr71000", PROCESSOR_SR71000, 64, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("xlr", PROCESSOR_XLR, 64, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("5kc", PROCESSOR_5KC, MIPS_ISA_MIPS64, 0)
+MIPS_CPU ("5kf", PROCESSOR_5KF, MIPS_ISA_MIPS64, 0)
+MIPS_CPU ("20kc", PROCESSOR_20KC, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("sb1", PROCESSOR_SB1, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("sb1a", PROCESSOR_SB1A, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("sr71000", PROCESSOR_SR71000, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("xlr", PROCESSOR_XLR, MIPS_ISA_MIPS64, PTF_AVOID_BRANCHLIKELY_SPEED)
 
 /* MIPS64 Release 2 processors.  */
-MIPS_CPU ("loongson3a", PROCESSOR_GS464, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("gs464", PROCESSOR_GS464, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("gs464e", PROCESSOR_GS464E, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("gs264e", PROCESSOR_GS264E, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("octeon", PROCESSOR_OCTEON, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("octeon+", PROCESSOR_OCTEON, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("octeon2", PROCESSOR_OCTEON2, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("octeon3", PROCESSOR_OCTEON3, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
-MIPS_CPU ("xlp", PROCESSOR_XLP, 65, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("loongson3a", PROCESSOR_GS464, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("gs464", PROCESSOR_GS464, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("gs464e", PROCESSOR_GS464E, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("gs264e", PROCESSOR_GS264E, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("octeon", PROCESSOR_OCTEON, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("octeon+", PROCESSOR_OCTEON, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("octeon2", PROCESSOR_OCTEON2, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("octeon3", PROCESSOR_OCTEON3, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
+MIPS_CPU ("xlp", PROCESSOR_XLP, MIPS_ISA_MIPS64R2, PTF_AVOID_BRANCHLIKELY_SPEED)
 
 /* MIPS64 Release 6 processors.  */
-MIPS_CPU ("i6400", PROCESSOR_I6400, 69, 0)
-MIPS_CPU ("i6500", PROCESSOR_I6400, 69, 0)
-MIPS_CPU ("p6600", PROCESSOR_P6600, 69, 0)
+MIPS_CPU ("i6400", PROCESSOR_I6400, MIPS_ISA_MIPS64R6, 0)
+MIPS_CPU ("i6500", PROCESSOR_I6400, MIPS_ISA_MIPS64R6, 0)
+MIPS_CPU ("p6600", PROCESSOR_P6600, MIPS_ISA_MIPS64R6, 0)
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 47aac9d3d..3b3af9c0d 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -81,7 +81,7 @@ struct mips_cpu_info {
   enum processor cpu;
 
   /* The ISA level that the processor implements.  */
-  int isa;
+  enum mips_isa isa;
 
   /* A mask of PTF_* values.  */
   unsigned int tune_flags;
@@ -247,20 +247,20 @@ struct mips_cpu_info {
   (TARGET_MIPS16 && mips_code_readable >= CODE_READABLE_PCREL)
 
 /* Generic ISA defines.  */
-#define ISA_MIPS1		    (mips_isa == 1)
-#define ISA_MIPS2		    (mips_isa == 2)
-#define ISA_MIPS3                   (mips_isa == 3)
-#define ISA_MIPS4		    (mips_isa == 4)
-#define ISA_MIPS32		    (mips_isa == 32)
-#define ISA_MIPS32R2		    (mips_isa == 33)
-#define ISA_MIPS32R3		    (mips_isa == 34)
-#define ISA_MIPS32R5		    (mips_isa == 36)
-#define ISA_MIPS32R6		    (mips_isa == 37)
-#define ISA_MIPS64                  (mips_isa == 64)
-#define ISA_MIPS64R2		    (mips_isa == 65)
-#define ISA_MIPS64R3		    (mips_isa == 66)
-#define ISA_MIPS64R5		    (mips_isa == 68)
-#define ISA_MIPS64R6		    (mips_isa == 69)
+#define ISA_MIPS1		    (mips_isa == MIPS_ISA_MIPS1)
+#define ISA_MIPS2		    (mips_isa == MIPS_ISA_MIPS2)
+#define ISA_MIPS3                   (mips_isa == MIPS_ISA_MIPS3)
+#define ISA_MIPS4		    (mips_isa == MIPS_ISA_MIPS4)
+#define ISA_MIPS32		    (mips_isa == MIPS_ISA_MIPS32)
+#define ISA_MIPS32R2		    (mips_isa == MIPS_ISA_MIPS32R2)
+#define ISA_MIPS32R3		    (mips_isa == MIPS_ISA_MIPS32R3)
+#define ISA_MIPS32R5		    (mips_isa == MIPS_ISA_MIPS32R5)
+#define ISA_MIPS32R6		    (mips_isa == MIPS_ISA_MIPS32R6)
+#define ISA_MIPS64                  (mips_isa == MIPS_ISA_MIPS64)
+#define ISA_MIPS64R2		    (mips_isa == MIPS_ISA_MIPS64R2)
+#define ISA_MIPS64R3		    (mips_isa == MIPS_ISA_MIPS64R3)
+#define ISA_MIPS64R5		    (mips_isa == MIPS_ISA_MIPS64R5)
+#define ISA_MIPS64R6		    (mips_isa == MIPS_ISA_MIPS64R6)
 
 /* Architecture target defines.  */
 #define TARGET_LOONGSON_2E          (mips_arch == PROCESSOR_LOONGSON_2E)
@@ -708,25 +708,25 @@ struct mips_cpu_info {
 #endif
 
 #ifndef MULTILIB_ISA_DEFAULT
-#if MIPS_ISA_DEFAULT == 1
+#if MIPS_ISA_DEFAULT == MIPS_ISA_MIPS1
 #define MULTILIB_ISA_DEFAULT "mips1"
-#elif MIPS_ISA_DEFAULT == 2
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS2
 #define MULTILIB_ISA_DEFAULT "mips2"
-#elif MIPS_ISA_DEFAULT == 3
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS3
 #define MULTILIB_ISA_DEFAULT "mips3"
-#elif MIPS_ISA_DEFAULT == 4
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS4
 #define MULTILIB_ISA_DEFAULT "mips4"
-#elif MIPS_ISA_DEFAULT == 32
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS32
 #define MULTILIB_ISA_DEFAULT "mips32"
-#elif MIPS_ISA_DEFAULT == 33
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS32R2
 #define MULTILIB_ISA_DEFAULT "mips32r2"
-#elif MIPS_ISA_DEFAULT == 37
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS32R6
 #define MULTILIB_ISA_DEFAULT "mips32r6"
-#elif MIPS_ISA_DEFAULT == 64
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS64
 #define MULTILIB_ISA_DEFAULT "mips64"
-#elif MIPS_ISA_DEFAULT == 65
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS64R2
 #define MULTILIB_ISA_DEFAULT "mips64r2"
-#elif MIPS_ISA_DEFAULT == 69
+#elif MIPS_ISA_DEFAULT == MIPS_ISA_MIPS64R6
 #define MULTILIB_ISA_DEFAULT "mips64r6"
 #else
 #define MULTILIB_ISA_DEFAULT "mips1"
diff --git a/gcc/config/mips/mips.md b/gcc/config/mips/mips.md
index 455b9b802..f35e50ced 100644
--- a/gcc/config/mips/mips.md
+++ b/gcc/config/mips/mips.md
@@ -21,6 +21,23 @@
 ;; along with GCC; see the file COPYING3.  If not see
 ;; <http://www.gnu.org/licenses/>.
 
+(define_enum "mips_isa" [
+  mips1=1
+  mips2
+  mips3
+  mips4
+  mips32=32
+  mips32r2
+  mips32r3
+  mips32r5=36
+  mips32r6
+  mips64=64
+  mips64r2
+  mips64r3
+  mips64r5=68
+  mips64r6
+])
+
 (define_enum "processor" [
   r3000
   4kc
