diff --git a/gdb/i387-tdep.c b/gdb/i387-tdep.c
index f25579c1a9a..389cf11bfbd 100644
--- a/gdb/i387-tdep.c
+++ b/gdb/i387-tdep.c
@@ -732,170 +732,204 @@ i387_collect_fxsave (const struct regcache *regcache, int regnum, void *fxsave)
 /* `xstate_bv' is at byte offset 512.  */
 #define XSAVE_XSTATE_BV_ADDR(xsave) (xsave + 512)
 
-/* At xsave_avxh_offset[REGNUM] you'll find the offset to the location in
-   the upper 128bit of AVX register data structure used by the "xsave"
-   instruction where GDB register REGNUM is stored.  */
+/* At xsave_avxh_offset[REGNUM] you'll find the relative offset within
+   the AVX region of the XSAVE extended state where the upper 128bits
+   of GDB register YMM0 + REGNUM is stored.  */
 
 static int xsave_avxh_offset[] =
 {
-  576 + 0 * 16,		/* Upper 128bit of %ymm0 through ...  */
-  576 + 1 * 16,
-  576 + 2 * 16,
-  576 + 3 * 16,
-  576 + 4 * 16,
-  576 + 5 * 16,
-  576 + 6 * 16,
-  576 + 7 * 16,
-  576 + 8 * 16,
-  576 + 9 * 16,
-  576 + 10 * 16,
-  576 + 11 * 16,
-  576 + 12 * 16,
-  576 + 13 * 16,
-  576 + 14 * 16,
-  576 + 15 * 16		/* Upper 128bit of ... %ymm15 (128 bits each).  */
+  0 * 16,		/* Upper 128bit of %ymm0 through ...  */
+  1 * 16,
+  2 * 16,
+  3 * 16,
+  4 * 16,
+  5 * 16,
+  6 * 16,
+  7 * 16,
+  8 * 16,
+  9 * 16,
+  10 * 16,
+  11 * 16,
+  12 * 16,
+  13 * 16,
+  14 * 16,
+  15 * 16		/* Upper 128bit of ... %ymm15 (128 bits each).  */
 };
 
-#define XSAVE_AVXH_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_avxh_offset[regnum - I387_YMM0H_REGNUM (tdep)])
+#define XSAVE_AVXH_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.avx_offset			\
+   + xsave_avxh_offset[regnum - I387_YMM0H_REGNUM (tdep)])
 
-/* At xsave_ymm_avx512_offset[REGNUM] you'll find the offset to the location in
-   the upper 128bit of ZMM register data structure used by the "xsave"
-   instruction where GDB register REGNUM is stored.  */
+/* At xsave_ymm_avx512_offset[REGNUM] you'll find the relative offset
+   within the ZMM region of the XSAVE extended state where the second
+   128bits of GDB register YMM16 + REGNUM is stored.  */
 
 static int xsave_ymm_avx512_offset[] =
 {
-  /* HI16_ZMM_area + 16 bytes + regnum* 64 bytes.  */
-  1664 + 16 + 0 * 64,		/* %ymm16 through...  */
-  1664 + 16 + 1 * 64,
-  1664 + 16 + 2 * 64,
-  1664 + 16 + 3 * 64,
-  1664 + 16 + 4 * 64,
-  1664 + 16 + 5 * 64,
-  1664 + 16 + 6 * 64,
-  1664 + 16 + 7 * 64,
-  1664 + 16 + 8 * 64,
-  1664 + 16 + 9 * 64,
-  1664 + 16 + 10 * 64,
-  1664 + 16 + 11 * 64,
-  1664 + 16 + 12 * 64,
-  1664 + 16 + 13 * 64,
-  1664 + 16 + 14 * 64,
-  1664 + 16 + 15 * 64		/* ...  %ymm31 (128 bits each).  */
+  16 + 0 * 64,		/* %ymm16 through...  */
+  16 + 1 * 64,
+  16 + 2 * 64,
+  16 + 3 * 64,
+  16 + 4 * 64,
+  16 + 5 * 64,
+  16 + 6 * 64,
+  16 + 7 * 64,
+  16 + 8 * 64,
+  16 + 9 * 64,
+  16 + 10 * 64,
+  16 + 11 * 64,
+  16 + 12 * 64,
+  16 + 13 * 64,
+  16 + 14 * 64,
+  16 + 15 * 64		/* ...  %ymm31 (128 bits each).  */
 };
 
-#define XSAVE_YMM_AVX512_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_ymm_avx512_offset[regnum - I387_YMM16H_REGNUM (tdep)])
+#define XSAVE_YMM_AVX512_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.zmm_offset				\
+   + xsave_ymm_avx512_offset[regnum - I387_YMM16H_REGNUM (tdep)])
+
+/* At xsave_xmm_avx512_offset[REGNUM] you'll find the relative offset
+   within the ZMM region of the XSAVE extended state where the first
+   128bits of GDB register XMM16 + REGNUM is stored.  */
 
 static int xsave_xmm_avx512_offset[] =
 {
-  1664 + 0 * 64,		/* %ymm16 through...  */
-  1664 + 1 * 64,
-  1664 + 2 * 64,
-  1664 + 3 * 64,
-  1664 + 4 * 64,
-  1664 + 5 * 64,
-  1664 + 6 * 64,
-  1664 + 7 * 64,
-  1664 + 8 * 64,
-  1664 + 9 * 64,
-  1664 + 10 * 64,
-  1664 + 11 * 64,
-  1664 + 12 * 64,
-  1664 + 13 * 64,
-  1664 + 14 * 64,
-  1664 + 15 * 64		/* ...  %ymm31 (128 bits each).  */
+  0 * 64,			/* %xmm16 through...  */
+  1 * 64,
+  2 * 64,
+  3 * 64,
+  4 * 64,
+  5 * 64,
+  6 * 64,
+  7 * 64,
+  8 * 64,
+  9 * 64,
+  10 * 64,
+  11 * 64,
+  12 * 64,
+  13 * 64,
+  14 * 64,
+  15 * 64			/* ...  %xmm31 (128 bits each).  */
 };
 
-#define XSAVE_XMM_AVX512_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_xmm_avx512_offset[regnum - I387_XMM16_REGNUM (tdep)])
+#define XSAVE_XMM_AVX512_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.zmm_offset				\
+   + xsave_xmm_avx512_offset[regnum - I387_XMM16_REGNUM (tdep)])
 
-static int xsave_mpx_offset[] = {
-  960 + 0 * 16,			/* bnd0r...bnd3r registers.  */
-  960 + 1 * 16,
-  960 + 2 * 16,
-  960 + 3 * 16,
-  1024 + 0 * 8,			/* bndcfg ... bndstatus.  */
-  1024 + 1 * 8,
+/* At xsave_bndregs_offset[REGNUM] you'll find the relative offset
+   within the BNDREGS region of the XSAVE extended state where the GDB
+   register BND0R + REGNUM is stored.  */
+
+static int xsave_bndregs_offset[] = {
+  0 * 16,			/* bnd0r...bnd3r registers.  */
+  1 * 16,
+  2 * 16,
+  3 * 16
+};
+
+#define XSAVE_BNDREGS_ADDR(tdep, xsave, regnum)				\
+  (xsave + (tdep)->xsave_layout.bndregs_offset				\
+   + xsave_bndregs_offset[regnum - I387_BND0R_REGNUM (tdep)])
+
+static int xsave_bndcfg_offset[] = {
+  0 * 8,			/* bndcfg ... bndstatus.  */
+  1 * 8,
 };
 
-#define XSAVE_MPX_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_mpx_offset[regnum - I387_BND0R_REGNUM (tdep)])
+#define XSAVE_BNDCFG_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.bndcfg_offset			\
+   + xsave_bndcfg_offset[regnum - I387_BNDCFGU_REGNUM (tdep)])
 
-  /* At xsave_avx512__h_offset[REGNUM] you find the offset to the location
-   of the AVX512 opmask register data structure used by the "xsave"
-   instruction where GDB register REGNUM is stored.  */
+/* At xsave_avx512_k_offset[REGNUM] you'll find the relative offset
+   within the K region of the XSAVE extended state where the AVX512
+   opmask register K0 + REGNUM is stored.  */
 
 static int xsave_avx512_k_offset[] =
 {
-  1088 + 0 * 8,			/* %k0 through...  */
-  1088 + 1 * 8,
-  1088 + 2 * 8,
-  1088 + 3 * 8,
-  1088 + 4 * 8,
-  1088 + 5 * 8,
-  1088 + 6 * 8,
-  1088 + 7 * 8     		/* %k7 (64 bits each).  */
+  0 * 8,			/* %k0 through...  */
+  1 * 8,
+  2 * 8,
+  3 * 8,
+  4 * 8,
+  5 * 8,
+  6 * 8,
+  7 * 8				/* %k7 (64 bits each).	*/
 };
 
-#define XSAVE_AVX512_K_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_avx512_k_offset[regnum - I387_K0_REGNUM (tdep)])
+#define XSAVE_AVX512_K_ADDR(tdep, xsave, regnum)		\
+  (xsave + (tdep)->xsave_layout.k_offset			\
+   + xsave_avx512_k_offset[regnum - I387_K0_REGNUM (tdep)])
 
-/* At xsave_avx512_zmm_h_offset[REGNUM] you find the offset to the location in
-   the upper 256bit of AVX512 ZMMH register data structure used by the "xsave"
-   instruction where GDB register REGNUM is stored.  */
 
-static int xsave_avx512_zmm_h_offset[] =
+/* At xsave_avx512_zmm0_h_offset[REGNUM] you find the relative offset
+   within the ZMM_H region of the XSAVE extended state where the upper
+   256bits of the GDB register ZMM0 + REGNUM is stored.  */
+
+static int xsave_avx512_zmm0_h_offset[] =
+{
+  0 * 32,		/* Upper 256bit of %zmmh0 through...  */
+  1 * 32,
+  2 * 32,
+  3 * 32,
+  4 * 32,
+  5 * 32,
+  6 * 32,
+  7 * 32,
+  8 * 32,
+  9 * 32,
+  10 * 32,
+  11 * 32,
+  12 * 32,
+  13 * 32,
+  14 * 32,
+  15 * 32		/* Upper 256bit of...  %zmmh15 (256 bits each).  */
+};
+
+#define XSAVE_AVX512_ZMM0_H_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.zmm_h_offset				\
+   + xsave_avx512_zmm0_h_offset[regnum - I387_ZMM0H_REGNUM (tdep)])
+
+/* At xsave_avx512_zmm16_h_offset[REGNUM] you find the relative offset
+   within the ZMM_H region of the XSAVE extended state where the upper
+   256bits of the GDB register ZMM16 + REGNUM is stored.  */
+
+static int xsave_avx512_zmm16_h_offset[] =
 {
-  1152 + 0 * 32,
-  1152 + 1 * 32,	/* Upper 256bit of %zmmh0 through...  */
-  1152 + 2 * 32,
-  1152 + 3 * 32,
-  1152 + 4 * 32,
-  1152 + 5 * 32,
-  1152 + 6 * 32,
-  1152 + 7 * 32,
-  1152 + 8 * 32,
-  1152 + 9 * 32,
-  1152 + 10 * 32,
-  1152 + 11 * 32,
-  1152 + 12 * 32,
-  1152 + 13 * 32,
-  1152 + 14 * 32,
-  1152 + 15 * 32,	/* Upper 256bit of...  %zmmh15 (256 bits each).  */
-  1664 + 32 + 0 * 64,   /* Upper 256bit of...  %zmmh16 (256 bits each).  */
-  1664 + 32 + 1 * 64,
-  1664 + 32 + 2 * 64,
-  1664 + 32 + 3 * 64,
-  1664 + 32 + 4 * 64,
-  1664 + 32 + 5 * 64,
-  1664 + 32 + 6 * 64,
-  1664 + 32 + 7 * 64,
-  1664 + 32 + 8 * 64,
-  1664 + 32 + 9 * 64,
-  1664 + 32 + 10 * 64,
-  1664 + 32 + 11 * 64,
-  1664 + 32 + 12 * 64,
-  1664 + 32 + 13 * 64,
-  1664 + 32 + 14 * 64,
-  1664 + 32 + 15 * 64   /* Upper 256bit of... %zmmh31 (256 bits each).  */
+  32 + 0 * 64,		/* Upper 256bit of...  %zmmh16 (256 bits each).  */
+  32 + 1 * 64,
+  32 + 2 * 64,
+  32 + 3 * 64,
+  32 + 4 * 64,
+  32 + 5 * 64,
+  32 + 6 * 64,
+  32 + 7 * 64,
+  32 + 8 * 64,
+  32 + 9 * 64,
+  32 + 10 * 64,
+  32 + 11 * 64,
+  32 + 12 * 64,
+  32 + 13 * 64,
+  32 + 14 * 64,
+  32 + 15 * 64		/* Upper 256bit of... %zmmh31 (256 bits each).  */
 };
 
-#define XSAVE_AVX512_ZMM_H_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_avx512_zmm_h_offset[regnum - I387_ZMM0H_REGNUM (tdep)])
+#define XSAVE_AVX512_ZMM16_H_ADDR(tdep, xsave, regnum)			\
+  (xsave + (tdep)->xsave_layout.zmm_offset				\
+   + xsave_avx512_zmm16_h_offset[regnum - I387_ZMM16H_REGNUM (tdep)])
 
-/* At xsave_pkeys_offset[REGNUM] you find the offset to the location
-   of the PKRU register data structure used by the "xsave"
-   instruction where GDB register REGNUM is stored.  */
+/* At xsave_pkeys_offset[REGNUM] you'll find the relative offset
+   within the PKEYS region of the XSAVE extended state where the PKRU
+   register is stored.  */
 
 static int xsave_pkeys_offset[] =
 {
-2688 + 0 * 8		/* %pkru (64 bits in XSTATE, 32-bit actually used by
+  0 * 8			/* %pkru (64 bits in XSTATE, 32-bit actually used by
 			   instructions and applications).  */
 };
 
-#define XSAVE_PKEYS_ADDR(tdep, xsave, regnum) \
-  (xsave + xsave_pkeys_offset[regnum - I387_PKRU_REGNUM (tdep)])
+#define XSAVE_PKEYS_ADDR(tdep, xsave, regnum)				\
+  (xsave + (tdep)->xsave_layout.pkru_offset				\
+   + xsave_pkeys_offset[regnum - I387_PKRU_REGNUM (tdep)])
 
 
 /* See i387-tdep.h.  */
@@ -998,14 +1032,16 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
       x87 = 0x1,
       sse = 0x2,
       avxh = 0x4,
-      mpx  = 0x8,
-      avx512_k = 0x10,
-      avx512_zmm_h = 0x20,
-      avx512_ymmh_avx512 = 0x40,
-      avx512_xmm_avx512 = 0x80,
-      pkeys = 0x100,
-      all = x87 | sse | avxh | mpx | avx512_k | avx512_zmm_h
-	    | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys
+      bndregs = 0x8,
+      bndcfg = 0x10,
+      avx512_k = 0x20,
+      avx512_zmm0_h = 0x40,
+      avx512_zmm16_h = 0x80,
+      avx512_ymmh_avx512 = 0x100,
+      avx512_xmm_avx512 = 0x200,
+      pkeys = 0x400,
+      all = x87 | sse | avxh | bndregs | bndcfg | avx512_k | avx512_zmm0_h
+	    | avx512_zmm16_h | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys
     } regclass;
 
   gdb_assert (regs != NULL);
@@ -1018,8 +1054,11 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	   && regnum < I387_PKEYSEND_REGNUM (tdep))
     regclass = pkeys;
   else if (regnum >= I387_ZMM0H_REGNUM (tdep)
+	   && regnum < I387_ZMM16H_REGNUM (tdep))
+    regclass = avx512_zmm0_h;
+  else if (regnum >= I387_ZMM16H_REGNUM (tdep)
 	   && regnum < I387_ZMMENDH_REGNUM (tdep))
-    regclass = avx512_zmm_h;
+    regclass = avx512_zmm16_h;
   else if (regnum >= I387_K0_REGNUM (tdep)
 	   && regnum < I387_KEND_REGNUM (tdep))
     regclass = avx512_k;
@@ -1033,8 +1072,11 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	   && regnum < I387_YMMENDH_REGNUM (tdep))
     regclass = avxh;
   else if (regnum >= I387_BND0R_REGNUM (tdep)
+	   && regnum < I387_BNDCFGU_REGNUM (tdep))
+    regclass = bndregs;
+  else if (regnum >= I387_BNDCFGU_REGNUM (tdep)
 	   && regnum < I387_MPXEND_REGNUM (tdep))
-    regclass = mpx;
+    regclass = bndcfg;
   else if (regnum >= I387_XMM0_REGNUM (tdep)
 	   && regnum < I387_MXCSR_REGNUM (tdep))
     regclass = sse;
@@ -1067,13 +1109,20 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	regcache->raw_supply (regnum, XSAVE_PKEYS_ADDR (tdep, regs, regnum));
       return;
 
-    case avx512_zmm_h:
-      if ((clear_bv & (regnum < zmm_endlo_regnum ? X86_XSTATE_ZMM_H
-						 : X86_XSTATE_ZMM)))
+    case avx512_zmm0_h:
+      if ((clear_bv & X86_XSTATE_ZMM_H))
 	regcache->raw_supply (regnum, zero);
       else
 	regcache->raw_supply (regnum,
-			      XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, regnum));
+			      XSAVE_AVX512_ZMM0_H_ADDR (tdep, regs, regnum));
+      return;
+
+    case avx512_zmm16_h:
+      if ((clear_bv & X86_XSTATE_ZMM))
+	regcache->raw_supply (regnum, zero);
+      else
+	regcache->raw_supply (regnum,
+			      XSAVE_AVX512_ZMM16_H_ADDR (tdep, regs, regnum));
       return;
 
     case avx512_k:
@@ -1106,11 +1155,18 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	regcache->raw_supply (regnum, XSAVE_AVXH_ADDR (tdep, regs, regnum));
       return;
 
-    case mpx:
+    case bndcfg:
+      if ((clear_bv & X86_XSTATE_BNDCFG))
+	regcache->raw_supply (regnum, zero);
+      else
+	regcache->raw_supply (regnum, XSAVE_BNDCFG_ADDR (tdep, regs, regnum));
+      return;
+
+    case bndregs:
       if ((clear_bv & X86_XSTATE_BNDREGS))
 	regcache->raw_supply (regnum, zero);
       else
-	regcache->raw_supply (regnum, XSAVE_MPX_ADDR (tdep, regs, regnum));
+	regcache->raw_supply (regnum, XSAVE_BNDREGS_ADDR (tdep, regs, regnum));
       return;
 
     case sse:
@@ -1159,7 +1215,7 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	    {
 	      for (i = I387_ZMM0H_REGNUM (tdep); i < zmm_endlo_regnum; i++)
 		regcache->raw_supply (i,
-				      XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i));
+				      XSAVE_AVX512_ZMM0_H_ADDR (tdep, regs, i));
 	    }
 	}
 
@@ -1187,7 +1243,8 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	{
 	  if ((clear_bv & X86_XSTATE_ZMM))
 	    {
-	      for (i = zmm_endlo_regnum; i < I387_ZMMENDH_REGNUM (tdep); i++)
+	      for (i = I387_ZMM16H_REGNUM (tdep);
+		   i < I387_ZMMENDH_REGNUM (tdep); i++)
 		regcache->raw_supply (i, zero);
 	      for (i = I387_YMM16H_REGNUM (tdep);
 		   i < I387_YMMH_AVX512_END_REGNUM (tdep);
@@ -1200,9 +1257,10 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	    }
 	  else
 	    {
-	      for (i = zmm_endlo_regnum; i < I387_ZMMENDH_REGNUM (tdep); i++)
+	      for (i = I387_ZMM16H_REGNUM (tdep);
+		   i < I387_ZMMENDH_REGNUM (tdep); i++)
 		regcache->raw_supply (i,
-				      XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i));
+				      XSAVE_AVX512_ZMM16_H_ADDR (tdep, regs, i));
 	      for (i = I387_YMM16H_REGNUM (tdep);
 		   i < I387_YMMH_AVX512_END_REGNUM (tdep);
 		   i++)
@@ -1245,7 +1303,7 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	    {
 	      for (i = I387_BND0R_REGNUM (tdep);
 		   i < I387_BNDCFGU_REGNUM (tdep); i++)
-		regcache->raw_supply (i, XSAVE_MPX_ADDR (tdep, regs, i));
+		regcache->raw_supply (i, XSAVE_BNDREGS_ADDR (tdep, regs, i));
 	    }
 	}
 
@@ -1262,7 +1320,7 @@ i387_supply_xsave (struct regcache *regcache, int regnum,
 	    {
 	      for (i = I387_BNDCFGU_REGNUM (tdep);
 		   i < I387_MPXEND_REGNUM (tdep); i++)
-		regcache->raw_supply (i, XSAVE_MPX_ADDR (tdep, regs, i));
+		regcache->raw_supply (i, XSAVE_BNDCFG_ADDR (tdep, regs, i));
 	    }
 	}
 
@@ -1418,14 +1476,16 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
       x87 = 0x2,
       sse = 0x4,
       avxh = 0x8,
-      mpx  = 0x10,
-      avx512_k = 0x20,
-      avx512_zmm_h = 0x40,
-      avx512_ymmh_avx512 = 0x80,
-      avx512_xmm_avx512 = 0x100,
-      pkeys = 0x200,
-      all = x87 | sse | avxh | mpx | avx512_k | avx512_zmm_h
-	    | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys
+      bndregs = 0x10,
+      bndcfg = 0x20,
+      avx512_k = 0x40,
+      avx512_zmm0_h = 0x80,
+      avx512_zmm16_h = 0x100,
+      avx512_ymmh_avx512 = 0x200,
+      avx512_xmm_avx512 = 0x400,
+      pkeys = 0x800,
+      all = x87 | sse | avxh | bndregs | bndcfg | avx512_k | avx512_zmm0_h
+	    | avx512_zmm16_h | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys
     } regclass;
 
   gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM);
@@ -1437,8 +1497,11 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	   && regnum < I387_PKEYSEND_REGNUM (tdep))
     regclass = pkeys;
   else if (regnum >= I387_ZMM0H_REGNUM (tdep)
+	   && regnum < I387_ZMM16H_REGNUM (tdep))
+    regclass = avx512_zmm0_h;
+  else if (regnum >= I387_ZMM16H_REGNUM (tdep)
 	   && regnum < I387_ZMMENDH_REGNUM (tdep))
-    regclass = avx512_zmm_h;
+    regclass = avx512_zmm16_h;
   else if (regnum >= I387_K0_REGNUM (tdep)
 	   && regnum < I387_KEND_REGNUM (tdep))
     regclass = avx512_k;
@@ -1452,8 +1515,11 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	   && regnum < I387_YMMENDH_REGNUM (tdep))
     regclass = avxh;
   else if (regnum >= I387_BND0R_REGNUM (tdep)
+	   && regnum < I387_BNDCFGU_REGNUM (tdep))
+    regclass = bndregs;
+  else if (regnum >= I387_BNDCFGU_REGNUM (tdep)
 	   && regnum < I387_MPXEND_REGNUM (tdep))
-    regclass = mpx;
+    regclass = bndcfg;
   else if (regnum >= I387_XMM0_REGNUM (tdep)
 	   && regnum < I387_MXCSR_REGNUM (tdep))
     regclass = sse;
@@ -1470,7 +1536,7 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
   if (gcore)
     {
       /* Clear XSAVE extended state.  */
-      memset (regs, 0, X86_XSTATE_SIZE (tdep->xcr0));
+      memset (regs, 0, tdep->xsave_layout.sizeof_xsave);
 
       /* Update XCR0 and `xstate_bv' with XCR0 for gcore.  */
       if (tdep->xsave_xcr0_offset != -1)
@@ -1505,16 +1571,16 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
       if ((clear_bv & X86_XSTATE_BNDREGS))
 	for (i = I387_BND0R_REGNUM (tdep);
 	     i < I387_BNDCFGU_REGNUM (tdep); i++)
-	  memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 16);
+	  memset (XSAVE_BNDREGS_ADDR (tdep, regs, i), 0, 16);
 
       if ((clear_bv & X86_XSTATE_BNDCFG))
 	for (i = I387_BNDCFGU_REGNUM (tdep);
 	     i < I387_MPXEND_REGNUM (tdep); i++)
-	  memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 8);
+	  memset (XSAVE_BNDCFG_ADDR (tdep, regs, i), 0, 8);
 
       if ((clear_bv & X86_XSTATE_ZMM_H))
 	for (i = I387_ZMM0H_REGNUM (tdep); i < zmm_endlo_regnum; i++)
-	  memset (XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i), 0, 32);
+	  memset (XSAVE_AVX512_ZMM0_H_ADDR (tdep, regs, i), 0, 32);
 
       if ((clear_bv & X86_XSTATE_K))
 	for (i = I387_K0_REGNUM (tdep);
@@ -1523,8 +1589,9 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 
       if ((clear_bv & X86_XSTATE_ZMM))
 	{
-	  for (i = zmm_endlo_regnum; i < I387_ZMMENDH_REGNUM (tdep); i++)
-	    memset (XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i), 0, 32);
+	  for (i = I387_ZMM16H_REGNUM (tdep); i < I387_ZMMENDH_REGNUM (tdep);
+	       i++)
+	    memset (XSAVE_AVX512_ZMM16_H_ADDR (tdep, regs, i), 0, 32);
 	  for (i = I387_YMM16H_REGNUM (tdep);
 	       i < I387_YMMH_AVX512_END_REGNUM (tdep); i++)
 	    memset (XSAVE_YMM_AVX512_ADDR (tdep, regs, i), 0, 16);
@@ -1587,15 +1654,27 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	  }
 
       /* Check if any ZMMH registers are changed.  */
-      if ((tdep->xcr0 & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM)))
-	for (i = I387_ZMM0H_REGNUM (tdep);
+      if ((tdep->xcr0 & X86_XSTATE_ZMM))
+	for (i = I387_ZMM16H_REGNUM (tdep);
 	     i < I387_ZMMENDH_REGNUM (tdep); i++)
 	  {
 	    regcache->raw_collect (i, raw);
-	    p = XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i);
+	    p = XSAVE_AVX512_ZMM16_H_ADDR (tdep, regs, i);
 	    if (memcmp (raw, p, 32) != 0)
 	      {
-		xstate_bv |= (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM);
+		xstate_bv |= X86_XSTATE_ZMM;
+		memcpy (p, raw, 32);
+	      }
+	  }
+
+      if ((tdep->xcr0 & X86_XSTATE_ZMM_H))
+	for (i = I387_ZMM0H_REGNUM (tdep); i < zmm_endlo_regnum; i++)
+	  {
+	    regcache->raw_collect (i, raw);
+	    p = XSAVE_AVX512_ZMM0_H_ADDR (tdep, regs, i);
+	    if (memcmp (raw, p, 32) != 0)
+	      {
+		xstate_bv |= X86_XSTATE_ZMM_H;
 		memcpy (p, raw, 32);
 	      }
 	  }
@@ -1647,7 +1726,7 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	     i < I387_BNDCFGU_REGNUM (tdep); i++)
 	  {
 	    regcache->raw_collect (i, raw);
-	    p = XSAVE_MPX_ADDR (tdep, regs, i);
+	    p = XSAVE_BNDREGS_ADDR (tdep, regs, i);
 	    if (memcmp (raw, p, 16))
 	      {
 		xstate_bv |= X86_XSTATE_BNDREGS;
@@ -1661,7 +1740,7 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	     i < I387_MPXEND_REGNUM (tdep); i++)
 	  {
 	    regcache->raw_collect (i, raw);
-	    p = XSAVE_MPX_ADDR (tdep, regs, i);
+	    p = XSAVE_BNDCFG_ADDR (tdep, regs, i);
 	    if (memcmp (raw, p, 8))
 	      {
 		xstate_bv |= X86_XSTATE_BNDCFG;
@@ -1750,15 +1829,26 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	    }
 	  break;
 
-	case avx512_zmm_h:
-	  /* This is a ZMM register.  */
-	  p = XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, regnum);
+	case avx512_zmm16_h:
+	  /* This is a ZMM16-31 register.  */
+	  p = XSAVE_AVX512_ZMM16_H_ADDR (tdep, regs, regnum);
 	  if (memcmp (raw, p, 32) != 0)
 	    {
-	      xstate_bv |= (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM);
+	      xstate_bv |= X86_XSTATE_ZMM;
 	      memcpy (p, raw, 32);
 	    }
 	  break;
+
+	case avx512_zmm0_h:
+	  /* This is a ZMM0-15 register.  */
+	  p = XSAVE_AVX512_ZMM0_H_ADDR (tdep, regs, regnum);
+	  if (memcmp (raw, p, 32) != 0)
+	    {
+	      xstate_bv |= X86_XSTATE_ZMM_H;
+	      memcpy (p, raw, 32);
+	    }
+	  break;
+
 	case avx512_k:
 	  /* This is a AVX512 mask register.  */
 	  p = XSAVE_AVX512_K_ADDR (tdep, regs, regnum);
@@ -1799,25 +1889,22 @@ i387_collect_xsave (const struct regcache *regcache, int regnum,
 	    }
 	  break;
 
-	case mpx:
-	  if (regnum < I387_BNDCFGU_REGNUM (tdep))
+	case bndregs:
+	  regcache->raw_collect (regnum, raw);
+	  p = XSAVE_BNDREGS_ADDR (tdep, regs, regnum);
+	  if (memcmp (raw, p, 16))
 	    {
-	      regcache->raw_collect (regnum, raw);
-	      p = XSAVE_MPX_ADDR (tdep, regs, regnum);
-	      if (memcmp (raw, p, 16))
-		{
-		  xstate_bv |= X86_XSTATE_BNDREGS;
-		  memcpy (p, raw, 16);
-		}
-	    }
-	  else
-	    {
-	      p = XSAVE_MPX_ADDR (tdep, regs, regnum);
-	      xstate_bv |= X86_XSTATE_BNDCFG;
-	      memcpy (p, raw, 8);
+	      xstate_bv |= X86_XSTATE_BNDREGS;
+	      memcpy (p, raw, 16);
 	    }
 	  break;
 
+	case bndcfg:
+	  p = XSAVE_BNDCFG_ADDR (tdep, regs, regnum);
+	  xstate_bv |= X86_XSTATE_BNDCFG;
+	  memcpy (p, raw, 8);
+	  break;
+
 	case sse:
 	  /* This is an SSE register.  */
 	  p = FXSAVE_ADDR (tdep, regs, regnum);
diff --git a/gdb/i387-tdep.h b/gdb/i387-tdep.h
index b7674155255..55651a497df 100644
--- a/gdb/i387-tdep.h
+++ b/gdb/i387-tdep.h
@@ -51,6 +51,7 @@ struct x86_xsave_layout;
 #define I387_K0_REGNUM(tdep) ((tdep)->k0_regnum)
 #define I387_NUM_ZMMH_REGS(tdep) ((tdep)->num_zmm_regs)
 #define I387_ZMM0H_REGNUM(tdep) ((tdep)->zmm0h_regnum)
+#define I387_ZMM16H_REGNUM(tdep) ((tdep)->zmm0h_regnum + 16)
 #define I387_NUM_YMM_AVX512_REGS(tdep) ((tdep)->num_ymm_avx512_regs)
 #define I387_YMM16H_REGNUM(tdep) ((tdep)->ymm16h_regnum)
 
