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[PATCH, rs6000] Add Power 8 support to vec_revb


GCC maintainers:

The following patch add Power8 vec_revb() builtin support to the
existing Power 9 support.  The Power ISA specification says the
vec_revb() builtin is to be supported on both Power 8 and Power 9.
There are new instructions in Power 9 that support the vec_revb()
functionality.  So the support generates different code for Power 8
versus Power 9.  

The patch has been tested on 

powerpc64le-unknown-linux-gnu (Power 8 LE)
powerpc64-unknown-linux-gnu (Power 8 BE)
powerpc64le-unknown-linux-gnu (Power 9 LE)

without regressions.  

Please let me know if the following patch is acceptable.  Thanks.

                       Carl Love

-------------------------------------------------------------------------------------------
>From 5813b99e68f1a5e82bcc1cb1ee0636f6386ba841 Mon Sep 17 00:00:00 2001
From: Carl Love <cel@us.ibm.com>
Date: Mon, 2 Oct 2017 11:04:01 -0500
Subject: [PATCH] Add Power 8 support to vec_revb

gcc/ChangeLog:

2017-10-05  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000-c.c (P8V_BUILTIN_VEC_REVB):
	Add power 8 definitions for the builtin instances.
	(P9V_BUILTIN_VEC_REVB): Remove the power 9 instance
	definitions.
	* config/rs6000/altivec.h (vec_revb): Change the
	#define from power 9 to power 8.
	* config/rs6000/rs6000-builtin.def (BU_P8V_VSX_1,
	BU_P8V_OVERLOAD_1): Add power 8 macro expansions.
	(BU_P9V_OVERLOAD_1): Remove power 9 overload expansion.
	* config/rs6000/vsx.md (revb_<mode>): Add define_expand
	to generate power 8 instructions for the vec_revb builtin.

gcc/testsuite/ChangeLog:

2017-10-05  Carl Love  <cel@us.ibm.com>

	*gcc.target/powerpc/builtins-revb-runnable.c: New
	runnable test file for the vec_revb builtin.
---
 gcc/config/rs6000/altivec.h                        |   3 +-
 gcc/config/rs6000/rs6000-builtin.def               |  10 +-
 gcc/config/rs6000/rs6000-c.c                       |  44 +--
 gcc/config/rs6000/vsx.md                           |  88 +++++
 .../gcc.target/powerpc/builtins-revb-runnable.c    | 354 +++++++++++++++++++++
 5 files changed, 474 insertions(+), 25 deletions(-)
 create mode 100644 gcc/testsuite/gcc.target/powerpc/builtins-revb-runnable.c

diff --git a/gcc/config/rs6000/altivec.h b/gcc/config/rs6000/altivec.h
index c8e508c..a05e23a 100644
--- a/gcc/config/rs6000/altivec.h
+++ b/gcc/config/rs6000/altivec.h
@@ -415,6 +415,7 @@
 #define vec_vsubuqm __builtin_vec_vsubuqm
 #define vec_vupkhsw __builtin_vec_vupkhsw
 #define vec_vupklsw __builtin_vec_vupklsw
+#define vec_revb __builtin_vec_revb
 #endif
 
 #ifdef __POWER9_VECTOR__
@@ -476,8 +477,6 @@
 
 #define vec_xlx __builtin_vec_vextulx
 #define vec_xrx __builtin_vec_vexturx
-
-#define vec_revb __builtin_vec_revb
 #endif
 
 /* Predicates.
diff --git a/gcc/config/rs6000/rs6000-builtin.def b/gcc/config/rs6000/rs6000-builtin.def
index 850164a..7ca2974 100644
--- a/gcc/config/rs6000/rs6000-builtin.def
+++ b/gcc/config/rs6000/rs6000-builtin.def
@@ -1853,6 +1853,13 @@ BU_P6_64BIT_2 (CMPB,     "cmpb",	CONST,	cmpbdi3)
 /* 1 argument VSX instructions added in ISA 2.07.  */
 BU_P8V_VSX_1 (XSCVSPDPN,      "xscvspdpn",	CONST,	vsx_xscvspdpn)
 BU_P8V_VSX_1 (XSCVDPSPN,      "xscvdpspn",	CONST,	vsx_xscvdpspn)
+BU_P8V_VSX_1 (REVB_V1TI,      "revb_v1ti",	CONST,   revb_v1ti)
+BU_P8V_VSX_1 (REVB_V2DI,      "revb_v2di",	CONST,   revb_v2di)
+BU_P8V_VSX_1 (REVB_V4SI,      "revb_v4si",	CONST,   revb_v4si)
+BU_P8V_VSX_1 (REVB_V8HI,      "revb_v8hi",	CONST,   revb_v8hi)
+BU_P8V_VSX_1 (REVB_V16QI,     "revb_v16qi",	CONST,   revb_v16qi)
+BU_P8V_VSX_1 (REVB_V2DF,      "revb_v2df",	CONST,   revb_v2df)
+BU_P8V_VSX_1 (REVB_V4SF,      "revb_v4sf",	CONST,   revb_v4sf)
 
 /* 1 argument altivec instructions added in ISA 2.07.  */
 BU_P8V_AV_1 (ABS_V2DI,	      "abs_v2di",	CONST,	absv2di2)
@@ -1962,6 +1969,7 @@ BU_P8V_OVERLOAD_1 (VPOPCNTUH,	"vpopcntuh")
 BU_P8V_OVERLOAD_1 (VPOPCNTUW,	"vpopcntuw")
 BU_P8V_OVERLOAD_1 (VPOPCNTUD,	"vpopcntud")
 BU_P8V_OVERLOAD_1 (VGBBD,	"vgbbd")
+BU_P8V_OVERLOAD_1 (REVB,	"revb")
 
 /* ISA 2.07 vector overloaded 2 argument functions.  */
 BU_P8V_OVERLOAD_2 (EQV,		"eqv")
@@ -2073,8 +2081,6 @@ BU_P9V_OVERLOAD_1 (VSTDCNQP,	"scalar_test_neg_qp")
 BU_P9V_OVERLOAD_1 (VSTDCNDP,	"scalar_test_neg_dp")
 BU_P9V_OVERLOAD_1 (VSTDCNSP,	"scalar_test_neg_sp")
 
-BU_P9V_OVERLOAD_1 (REVB,	"revb")
-
 BU_P9V_OVERLOAD_1 (VEXTRACT_FP_FROM_SHORTH, "vextract_fp_from_shorth")
 BU_P9V_OVERLOAD_1 (VEXTRACT_FP_FROM_SHORTL, "vextract_fp_from_shortl")
 
diff --git a/gcc/config/rs6000/rs6000-c.c b/gcc/config/rs6000/rs6000-c.c
index 897306c..0706319 100644
--- a/gcc/config/rs6000/rs6000-c.c
+++ b/gcc/config/rs6000/rs6000-c.c
@@ -5532,36 +5532,38 @@ const struct altivec_builtin_types altivec_overloaded_builtins[] = {
     RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI,
     RS6000_BTI_unsigned_V16QI, 0 },
 
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRQ_V16QI,
-    RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRQ_V16QI,
-    RS6000_BTI_bool_V16QI, RS6000_BTI_bool_V16QI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRQ_V16QI,
-    RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRQ_V1TI,
-    RS6000_BTI_unsigned_V1TI, RS6000_BTI_unsigned_V1TI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRQ_V1TI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V1TI,
     RS6000_BTI_V1TI, RS6000_BTI_V1TI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRD_V2DI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V1TI,
+    RS6000_BTI_unsigned_V1TI, RS6000_BTI_unsigned_V1TI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V2DI,
+    RS6000_BTI_bool_V2DI, RS6000_BTI_bool_V2DI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V2DI,
     RS6000_BTI_unsigned_V2DI, RS6000_BTI_unsigned_V2DI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRD_V2DI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V2DI,
     RS6000_BTI_V2DI, RS6000_BTI_V2DI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRD_V2DF,
-    RS6000_BTI_V2DF, RS6000_BTI_V2DF, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRW_V4SI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V4SI,
     RS6000_BTI_bool_V4SI, RS6000_BTI_bool_V4SI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRW_V4SI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V4SI,
     RS6000_BTI_unsigned_V4SI, RS6000_BTI_unsigned_V4SI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRW_V4SI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V4SI,
     RS6000_BTI_V4SI, RS6000_BTI_V4SI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRW_V4SF,
-    RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRH_V8HI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V8HI,
     RS6000_BTI_bool_V8HI, RS6000_BTI_bool_V8HI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRH_V8HI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V8HI,
     RS6000_BTI_unsigned_V8HI, RS6000_BTI_unsigned_V8HI, 0, 0 },
-  { P9V_BUILTIN_VEC_REVB, P9V_BUILTIN_XXBRH_V8HI,
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V8HI,
     RS6000_BTI_V8HI, RS6000_BTI_V8HI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V16QI,
+    RS6000_BTI_bool_V16QI, RS6000_BTI_bool_V16QI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V16QI,
+    RS6000_BTI_unsigned_V16QI, RS6000_BTI_unsigned_V16QI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V16QI,
+    RS6000_BTI_V16QI, RS6000_BTI_V16QI, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V2DF,
+    RS6000_BTI_V2DF, RS6000_BTI_V2DF, 0, 0 },
+  { P8V_BUILTIN_VEC_REVB, P8V_BUILTIN_REVB_V4SF,
+    RS6000_BTI_V4SF, RS6000_BTI_V4SF, 0, 0 },
 
   { ALTIVEC_BUILTIN_VEC_VREVE, ALTIVEC_BUILTIN_VREVE_V2DI,
     RS6000_BTI_V2DI, RS6000_BTI_V2DI, 0, 0 },
diff --git a/gcc/config/rs6000/vsx.md b/gcc/config/rs6000/vsx.md
index b47eeac..fccde97 100644
--- a/gcc/config/rs6000/vsx.md
+++ b/gcc/config/rs6000/vsx.md
@@ -4712,6 +4712,94 @@
   "xxbrw %x0,%x1"
   [(set_attr "type" "vecperm")])
 
+;; Swap all bytes in each 32-bit element
+(define_expand "revb_<mode>"
+  [(set (match_operand:VSX_L 0 "vsx_register_operand" "=wa")
+  (bswap:VSX_L (match_operand:VSX_L 1 "vsx_register_operand" "wa")))]
+  "TARGET_P9_VECTOR || TARGET_VSX"
+{
+  int vals[16];
+  rtx mask = gen_reg_rtx (V16QImode);
+  int i;
+  rtvec v;
+  rtx rvals[16];
+
+  if (TARGET_P9_VECTOR)
+    {
+       if (<MODE>mode == V1TImode)
+          emit_insn (gen_p9_xxbrq_v1ti (operands[0], operands[1]));
+       else if (<MODE>mode == V2DImode)
+          emit_insn (gen_p9_xxbrd_v2di (operands[0], operands[1]));
+       else if (<MODE>mode == V2DFmode)
+          emit_insn (gen_p9_xxbrd_v2df (operands[0], operands[1]));
+       else if (<MODE>mode == V4SImode)
+          emit_insn (gen_p9_xxbrw_v4si (operands[0], operands[1]));
+       else if (<MODE>mode == V4SFmode)
+          emit_insn (gen_p9_xxbrw_v4sf (operands[0], operands[1]));
+       else if (<MODE>mode == V8HImode)
+          emit_insn (gen_p9_xxbrh_v8hi (operands[0], operands[1]));
+       else if (<MODE>mode == V16QImode)
+          emit_insn (gen_p9_xxbrq_v16qi (operands[0], operands[1]));
+    }
+  else
+    {
+      if (<MODE>mode == V1TImode)
+        {
+           vals[0] = 15; vals[1] = 14; vals[2] = 13; vals[3] = 12;
+           vals[4] = 11; vals[5] = 10; vals[6] = 9; vals[7] = 8;
+           vals[8] = 7; vals[9] = 6; vals[10] = 5; vals[11] = 4;
+           vals[12] = 3; vals[13] = 2; vals[14] = 1; vals[15] = 0;
+        }
+      else if ((<MODE>mode == V2DImode) || (<MODE>mode == V2DFmode))
+        {
+           vals[0] = 7; vals[1] = 6; vals[2] = 5; vals[3] = 4;
+           vals[4] = 3; vals[5] = 2; vals[6] = 1; vals[7] = 0;
+           vals[8] = 15; vals[9] = 14; vals[10] = 13; vals[11] = 12;
+           vals[12] = 11; vals[13] = 10; vals[14] = 9; vals[15] = 8;
+        }
+      else if ((<MODE>mode == V4SImode) || (<MODE>mode == V4SFmode))
+        {
+           vals[0] = 3; vals[1] = 2; vals[2] = 1; vals[3] = 0;
+           vals[4] = 7; vals[5] = 6; vals[6] = 5; vals[7] = 4;
+           vals[8] = 11; vals[9] = 10; vals[10] = 9; vals[11] = 8;
+           vals[12] = 15; vals[13] = 14; vals[14] = 13; vals[15] = 12;
+        }
+      else if (<MODE>mode == V8HImode)
+        {
+           vals[0] = 1; vals[1] = 0; vals[2] = 3; vals[3] = 2;
+           vals[4] = 5; vals[5] = 4; vals[6] = 7; vals[7] = 6;
+           vals[8] = 9; vals[9] = 8; vals[10] = 11; vals[11] = 10;
+           vals[12] = 13; vals[13] = 12; vals[14] = 15; vals[15] = 14;
+        }
+      else if (<MODE>mode == V16QImode)
+        {
+           vals[0] = 15; vals[1] = 14; vals[2] = 13; vals[3] = 12;
+           vals[4] = 11; vals[5] = 10; vals[6] = 9; vals[7] = 8;
+           vals[8] = 7; vals[9] = 6; vals[10] = 5; vals[11] = 4;
+           vals[12] = 3; vals[13] = 2; vals[14] = 1; vals[15] = 0;
+        }
+      else
+        {
+           vals[0] = 0; vals[1] = 0; vals[2] = 0; vals[3] = 0;
+           vals[4] = 0; vals[5] = 0; vals[6] = 0; vals[7] = 0;
+           vals[8] = 0; vals[9] = 0; vals[10] = 0; vals[11] = 0;
+           vals[12] = 0; vals[13] = 0; vals[14] = 0; vals[15] = 0;
+        }
+      for (i = 0; i < 16; i++)
+         rvals[i] = GEN_INT (vals[i]);
+
+      v = gen_rtvec_v (16, rvals);
+
+      emit_insn (gen_vec_initv16qiqi (mask, gen_rtx_PARALLEL (V8HImode, v)));
+      emit_insn (gen_altivec_vperm_<mode> (operands[0], operands[1],
+					   operands[1], mask));
+    }
+  DONE;
+}
+
+;;  [(set_attr "type" "vecperm")])
+)
+
 ;; Swap all bytes in each 16-bit element
 (define_insn "p9_xxbrh_v8hi"
   [(set (match_operand:V8HI 0 "vsx_register_operand" "=wa")
diff --git a/gcc/testsuite/gcc.target/powerpc/builtins-revb-runnable.c b/gcc/testsuite/gcc.target/powerpc/builtins-revb-runnable.c
new file mode 100644
index 0000000..03333ce
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/builtins-revb-runnable.c
@@ -0,0 +1,354 @@
+/* { dg-do run { target { powerpc*-*-* } } } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
+/* { dg-require-effective-target vsx_hw } */
+/* { dg-options "-mcpu=power8  -O3" } */
+
+#include <altivec.h>
+
+#define DEBUG 1
+
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
+void abort (void);
+
+/* Verify vec_revb builtins */
+
+int
+main()
+{
+  int i;
+  vector bool char arg_bc, result_bc, expected_bc;
+  vector unsigned char arg_uc, result_uc, expected_uc;
+  vector signed char arg_sc, result_sc, expected_sc;
+
+  vector bool short int arg_bsi, result_bsi, expected_bsi;
+  vector unsigned short int arg_usi, result_usi, expected_usi;
+  vector short int arg_si, result_si, expected_si;
+
+  vector bool int arg_bi, result_bi, expected_bi;
+  vector unsigned int arg_ui, result_ui, expected_ui;
+  vector int arg_int, result_int, expected_int;
+
+  vector bool long long int arg_blli, result_blli, expected_blli;
+  vector unsigned long long int arg_ulli, result_ulli, expected_ulli;
+  vector long long int arg_lli, result_lli, expected_lli;
+
+  vector __uint128_t arg_uint128, result_uint128, expected_uint128;
+  vector __int128_t arg_int128, result_int128, expected_int128;
+
+  vector float arg_f, result_f, expected_f;
+  vector double arg_d, result_d, expected_d;
+
+  /* 8-bit ints */
+  arg_bc = (vector bool char) {0x01, 0x23, 0x45, 0x67,
+			       0x7E, 0x7C, 0x7A, 0x78,
+			       0x02, 0x46, 0x7A, 0x7E,
+			       0x13, 0x57, 0x7B, 0x7F};
+  expected_bc = (vector bool char) {0x7F, 0x7b, 0x57, 0x13,
+				    0x7E, 0x7A, 0x46, 0x02,
+				    0x78, 0x7A, 0x7C, 0x7E,
+				    0x67, 0x45, 0x23, 0x01};
+
+  result_bc = vec_revb (arg_bc);
+
+  for (i = 0; i < 16; i++) {
+    if (result_bc[i] != expected_bc[i])
+#ifdef DEBUG
+       printf("arg_bc[%d] = 0x%x, result_bc[%d] = 0x%x, expected_bc[%d] = 0x%x\n",
+	      i, arg_bc[i], i, result_bc[i], i, expected_bc[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_uc = (vector unsigned char) {0x01, 0x23, 0x45, 0x67,
+				   0x7E, 0x7C, 0x7A, 0x78,
+				   0x02, 0x46, 0x7A, 0x7E,
+				   0x13, 0x57, 0x7B, 0x7F};
+  expected_uc = (vector unsigned char) {0x7F, 0x7b, 0x57, 0x13,
+					0x7E, 0x7A, 0x46, 0x02,
+					0x78, 0x7A, 0x7C, 0x7E,
+					0x67, 0x45, 0x23, 0x01};
+
+  result_uc = vec_revb (arg_uc);
+
+  for (i = 0; i < 16; i++) {
+    if (result_uc[i] != expected_uc[i])
+#ifdef DEBUG
+       printf("arg_uc[%d] = 0x%x, result_uc[%d] = 0x%x, expected_uc[%d] = 0x%x\n",
+	      i, arg_uc[i], i, result_uc[i], i, expected_uc[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_sc = (vector signed char) {0x01, 0x23, 0x45, 0x67,
+				 0x7E, 0x7C, 0x7A, 0x78,
+				 0x02, 0x46, 0x7A, 0x7E,
+				 0x13, 0x57, 0x7B, 0x7F};
+  expected_sc = (vector signed char) {0x7F, 0x7b, 0x57, 0x13,
+				      0x7E, 0x7A, 0x46, 0x02,
+				      0x78, 0x7A, 0x7C, 0x7E,
+				      0x67, 0x45, 0x23, 0x01};
+
+  result_sc = vec_revb (arg_sc);
+
+  for (i = 0; i < 16; i++) {
+    if (result_sc[i] != expected_sc[i])
+#ifdef DEBUG
+      printf("arg_sc[%d] = 0x%x, result_sc[%d] = 0x%x, expected_sc[%d] = 0x%x\n",
+	     i, arg_sc[i], i, result_sc[i], i, expected_sc[i]);
+#else
+    abort();
+#endif
+  }
+
+  /* 16-bit ints */
+  arg_bsi = (vector bool short int) {0x0123, 0x4567, 0xFEDC, 0xBA98, 0x0246,
+				     0x8ACE, 0x1357, 0x9BDF};
+  expected_bsi = (vector bool short int) {0x2301, 0x6745, 0xDCFE, 0x98BA,
+					  0x4602, 0xCE8A, 0x5713, 0xDF9B};
+
+  result_bsi = vec_revb (arg_bsi);
+
+  for (i = 0; i < 8; i++) {
+    if (result_bsi[i] != expected_bsi[i])
+#ifdef DEBUG
+       printf("arg_bsi[%d] = 0x%x, result_bsi[%d] = 0x%x, expected_bsi[%d] = 0x%x\n",
+	      i, arg_bsi[i], i, result_bsi[i], i, expected_bsi[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_usi = (vector unsigned short int) {0x0123, 0x4567, 0xFEDC, 0xBA98,
+					 0x0246, 0x8ACE, 0x1357, 0x9BDF};
+  expected_usi = (vector unsigned short int) {0x2301, 0x6745, 0xDCFE, 0x98BA,
+					      0x4602, 0xCE8A, 0x5713, 0xDF9B};
+
+  result_usi = vec_revb (arg_usi);
+
+  for (i = 0; i < 8; i++) {
+    if (result_usi[i] != expected_usi[i])
+#ifdef DEBUG
+      printf("arg_usi[%d] = 0x%x, result_usi[%d] = 0x%x, expected_usi[%d] = 0x%x\n",
+	     i, arg_usi[i], i, result_usi[i], i, expected_usi[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_si = (vector short int) {0x0123, 0x4567, 0xFEDC, 0xBA98, 0x0246, 0x8ACE,
+			       0x1357, 0x9BDF};
+  expected_si = (vector short int) {0x2301, 0x6745, 0xDCFE, 0x98BA, 0x4602,
+				    0xCE8A, 0x5713, 0xDF9B};
+
+  result_si = vec_revb (arg_si);
+
+  for (i = 0; i < 8; i++) {
+    if (result_si[i] != expected_si[i])
+#ifdef DEBUG
+       printf("arg_si[%d] = 0x%x, result_si[%d] = 0x%x, expected_si[%d] = 0x%x\n",
+	      i, arg_si[i], i, result_si[i], i, expected_si[i]);
+#else
+    abort();
+#endif
+  }
+
+  /* 32-bit ints */
+  arg_bi = (vector bool int) {0x01234567, 0xFEDCBA98, 0x02468ACE, 0x13579BDF};
+  expected_bi = (vector bool int) {0x67452301, 0x98BADCFE, 0xCE8A4602,
+				   0xDF9B5713};
+
+  result_bi = vec_revb (arg_bi);
+
+  for (i = 0; i < 4; i++) {
+    if (result_bi[i] != expected_bi[i])
+#ifdef DEBUG
+      printf("arg_bi[%d] = 0x%x, result_bi[%d] = 0x%x, expected_bi[%d] = 0x%x\n",
+	     i, arg_bi[i], i, result_bi[i], i, expected_bi[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_ui = (vector unsigned int) {0x01234567, 0xFEDCBA98, 0x02468ACE,
+				  0x13579BDF};
+  expected_ui = (vector unsigned int) {0x67452301, 0x98BADCFE, 0xCE8A4602,
+				       0xDF9B5713};
+
+  result_ui = vec_revb (arg_ui);
+
+  for (i = 0; i < 4; i++) {
+    if (result_ui[i] != expected_ui[i])
+#ifdef DEBUG
+      printf("arg_ui[%d] = 0x%x, result_ui[%d] = 0x%x, expected_ui[%d] = 0x%x\n",
+	     i, arg_ui[i], i, result_ui[i], i, expected_ui[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_int = (vector int) {0x01234567, 0xFEDCBA98, 0x02468ACE, 0x13579BDF};
+  expected_int = (vector int) {0x67452301, 0x98BADCFE, 0xCE8A4602, 0xDF9B5713};
+
+  result_int = vec_revb (arg_int);
+
+  for (i = 0; i < 4; i++) {
+    if (result_int[i] != expected_int[i])
+#ifdef DEBUG
+      printf("arg_int[%d] = 0x%x, result_int[%d] = 0x%x, expected_int[%d] = 0x%x\n",
+	     i, arg_int[i], i, result_int[i], i, expected_int[i]);
+#else
+    abort();
+#endif
+  }
+
+  /* 64-bit ints */
+  arg_blli = (vector bool long long int) {0x01234567FEDCBA98,
+					  0x02468ACE13579BDF};
+  expected_blli = (vector bool long long int) {0x98BADCFE67452301,
+					       0xDF9B5713CE8A4602};
+
+  result_blli = vec_revb (arg_blli);
+
+  for (i = 0; i < 2; i++) {
+    if (result_blli[i] != expected_blli[i])
+#ifdef DEBUG
+      printf("arg_blli[%d] = 0x%x, result_blli[%d] = 0x%llx, expected_blli[%d] = 0x%llx\n",
+	     i, arg_blli[i], i, result_blli[i], i, expected_blli[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_ulli = (vector unsigned long long int) {0x01234567FEDCBA98,
+					      0x02468ACE13579BDF};
+  expected_ulli = (vector unsigned long long int) {0x98BADCFE67452301,
+						   0xDF9B5713CE8A4602};
+
+  result_ulli = vec_revb (arg_ulli);
+
+  for (i = 0; i < 2; i++) {
+    if (result_ulli[i] != expected_ulli[i])
+#ifdef DEBUG
+      printf("arg_ulli[%d] = 0x%x, result_ulli[%d] = 0x%llx, expected_ulli[%d] = 0x%llx\n",
+	     i, arg_ulli[i], i, result_ulli[i], i, expected_ulli[i]);
+#else
+    abort();
+#endif
+  }
+
+  arg_lli = (vector long long int) {0x01234567FEDCBA98, 0x02468ACE13579BDF};
+  expected_lli = (vector long long int) {0x98BADCFE67452301,
+					 0xDF9B5713CE8A4602};
+
+  result_lli = vec_revb (arg_lli);
+
+  for (i = 0; i < 2; i++) {
+    if (result_lli[i] != expected_lli[i])
+#ifdef DEBUG
+      printf("arg_lli[%d] = 0x%x, result_lli[%d] = 0x%llx, expected_lli[%d] = 0x%llx\n",
+	     i, arg_lli[i], i, result_lli[i], i, expected_lli[i]);
+#else
+    abort();
+#endif
+  }
+
+  /* 128-bit ints */
+  arg_uint128[0] = 0x1627384950617243;
+  arg_uint128[0] = arg_uint128[0] << 64;
+  arg_uint128[0] |= 0x9405182930415263;
+  expected_uint128[0] = 0x6352413029180594;
+  expected_uint128[0] = expected_uint128[0] << 64;
+  expected_uint128[0] |= 0x4372615049382716;
+
+  result_uint128 = vec_revb (arg_uint128);
+
+  if (result_uint128[0] != expected_uint128[0])
+    {
+#ifdef DEBUG
+       printf("result_uint128[0] doesn't match expected_u128[0]\n");
+       printf("arg_uint128[0] =  %llx ", arg_uint128[0] >> 64);
+       printf(" %llx\n",	 arg_uint128[0] & 0xFFFFFFFFFFFFFFFF);
+
+       printf("result_uint128[0] =  %llx ", result_uint128[0] >> 64);
+       printf(" %llx\n", result_uint128[0] & 0xFFFFFFFFFFFFFFFF);
+
+       printf("expected_uint128[0] =  %llx ", expected_uint128[0] >> 64);
+       printf(" %llx\n", expected_uint128[0] & 0xFFFFFFFFFFFFFFFF);
+#else
+    abort();
+#endif
+    }
+
+  arg_int128[0] = 0x1627384950617283;
+  arg_int128[0] = arg_int128[0] << 64;
+  arg_int128[0] |= 0x9405182930415263;
+  expected_int128[0] = 0x6352413029180594;
+  expected_int128[0] = expected_int128[0] << 64;
+  expected_int128[0] |= 0x8372615049382716;;
+
+  result_int128 = vec_revb (arg_int128);
+
+  if (result_int128[0] != expected_int128[0])
+    {
+#ifdef DEBUG
+       printf("result_int128[0] doesn't match expected128[0]\n");
+       printf("arg_int128[0] =  %llx ", arg_int128[0] >> 64);
+       printf(" %llx\n",	 arg_int128[0] & 0xFFFFFFFFFFFFFFFF);
+
+       printf("result_int128[0] =  %llx ", result_int128[0] >> 64);
+       printf(" %llx\n", result_int128[0] & 0xFFFFFFFFFFFFFFFF);
+
+       printf("expected_int128[0] =  %llx ", expected_int128[0] >> 64);
+       printf(" %llx\n", expected_int128[0] & 0xFFFFFFFFFFFFFFFF);
+#else
+    abort();
+#endif
+    }
+
+  /* 32-bit floats */
+  /* 0x42f7224e, 0x43e471ec, 0x49712062, 0x4a0f2b38 */
+  arg_f = (vector float) {123.567, 456.89, 987654.123456, 2345678.0};
+  /* 0x4e22F742, 0xec71e443, 0x62207149, 0x382b0f4a */
+  expected_f = (vector float) {683528320.0,
+			       -1169716232068291395011477504.0,
+			       739910526898278498304.0,
+			       0.0000407838160754181444644927978515625};
+
+  result_f = vec_revb (arg_f);
+
+  for (i = 0; i < 4; i++) {
+    if (result_f[i] != expected_f[i])
+      {
+#ifdef DEBUG
+        printf("    arg_f[%d] = 0x%x, result_f[%d] = 0x%x, expected_f[%d] = 0x%x\n",
+	       i, arg_f[i], i, result_f[i], i, expected_f[i]);
+#else
+	abort();
+#endif
+      }
+  }
+
+  /* 64-bit floats */
+  /* 0x419D6F34547E6B75   0x4194E5FEC781948B */
+  arg_d = (vector double) {123456789.123456789, 87654321.87654321};
+  /* 0x756B7E54346F9D41   0x8B9481C7FEE59441 */
+  expected_d = (vector double) {4.12815412905659550518671402044E257,
+				-6.99269992046390236552018719554E-253};
+
+  result_d = vec_revb (arg_d);
+
+  for (i = 0; i < 2; i++) {
+    if (result_d[i] != expected_d[i])
+#ifdef DEBUG
+      printf("arg_d[%d] = 0x%llx, result_d[%d] = 0x%llx, expected_d[%d] = %f\n",
+	     i, arg_d[i], i, result_d[i], i, expected_d[i]);
+#else
+    abort();
+#endif
+  }
+}
-- 
2.7.4




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