From: Guinevere Larsen <guinevere@redhat.com>
Date: Thu, 12 Jun 2025 19:55:28 +0000 (-0300)
Subject: gdb/record: add support for AVX blend instructions
X-Git-Tag: binutils-2_45~79
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6f129dba1dc0795aa810b2a8c246fd92a198f7e2;p=thirdparty%2Fbinutils-gdb.git

gdb/record: add support for AVX blend instructions

This commit supports for the following instructions:
* VBLENDP[S|D]
* VBLENDVP[S|D]
* VPBLEND[D|W|VB]

and test them.
---

diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 45ae8b65e3d..863872dcb9f 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -5110,15 +5110,20 @@ i386_record_vex (struct i386_record_s *ir, uint8_t vex_w, uint8_t vex_r,
 
     case 0x00:	/* VSHUFB and VPERMQ.  */
     case 0x01:	/* VPERMPD.  */
+    case 0x02:	/* VPBLENDD.  */
     case 0x04:	/* VPERMILPS with immediate.  */
     case 0x05:	/* VPERMILPD with immediate.  */
     case 0x06:	/* VMPERM2F128.  */
-    case 0x0c:	/* VPERMILPS with register.  */
-    case 0x0d:	/* VPERMILPD with register.  */
+    case 0x0c:	/* VPERMILPS with register and VBLENDPS.  */
+    case 0x0d:	/* VPERMILPD with register and VBLENDPD.  */
+    case 0x0e:	/* VPBLENDW.  */
     case 0x1a:	/* VBROADCASTF128.  */
     case 0x36:	/* VPERMD.  */
     case 0x40:	/* VPMULLD  */
     case 0x46:	/* VPERM2I128.  */
+    case 0x4a:	/* VBLENDVPS.  */
+    case 0x4b:	/* VBLENDVPD.  */
+    case 0x4c:	/* VPBLENDVB.  */
     case 0x57:	/* VXORP[S|D]  */
     case 0x58:	/* VPBROADCASTD and VADD[P|S][S|D]  */
     case 0x59:	/* VPBROADCASTQ and VMUL[P|S][S|D]  */
diff --git a/gdb/testsuite/gdb.reverse/i386-avx-reverse.c b/gdb/testsuite/gdb.reverse/i386-avx-reverse.c
index ef7d0d86f50..c4148033f59 100644
--- a/gdb/testsuite/gdb.reverse/i386-avx-reverse.c
+++ b/gdb/testsuite/gdb.reverse/i386-avx-reverse.c
@@ -628,6 +628,32 @@ extract_insert_test ()
   return 0; /* end extract_insert_test  */
 }
 
+int
+blend_test ()
+{
+  /* start blend_test.  */
+  /* Using GDB, load these values onto registers for testing.
+     ymm0.v2_int128 = {0, 0}
+     ymm1.v16_int16 = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}
+     ymm2.v16_int16 = {17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32}
+     ymm15.v2_int128 = {0x0, 0x0}
+     this way it's easy to confirm we're undoing things correctly.  */
+
+  asm volatile ("vblendps $5, %xmm1, %xmm2, %xmm0");
+  asm volatile ("vblendpd $10, %ymm1, %ymm2, %ymm15");
+  asm volatile ("vblendvps %ymm15, %ymm1, %ymm2, %ymm0");
+  asm volatile ("vblendvpd %xmm0, %xmm1, %xmm2, %xmm15");
+
+  asm volatile ("vpblendw $94, %ymm1, %ymm2, %ymm15");
+  asm volatile ("vpblendw $47, %xmm1, %xmm2, %xmm0");
+  asm volatile ("vpblendd $22, %ymm1, %ymm2, %ymm0");
+  asm volatile ("vpblendd $11, %xmm1, %xmm2, %xmm15");
+  asm volatile ("vpblendvb %xmm0, %xmm1, %xmm2, %xmm15");
+  asm volatile ("vpblendvb %ymm0, %ymm1, %ymm2, %ymm0");
+
+  return 0; /* end blend_test  */
+}
+
 /* This include is used to allocate the dynamic buffer and have
    the pointers aligned to a 32-bit boundary, so we can test instructions
    that require aligned memory.  */
@@ -664,5 +690,6 @@ main ()
   shuffle_test ();
   permute_test ();
   extract_insert_test ();
+  blend_test ();
   return 0;	/* end of main */
 }
diff --git a/gdb/testsuite/gdb.reverse/i386-avx-reverse.exp b/gdb/testsuite/gdb.reverse/i386-avx-reverse.exp
index 36e611fe0dd..7307f88fe07 100644
--- a/gdb/testsuite/gdb.reverse/i386-avx-reverse.exp
+++ b/gdb/testsuite/gdb.reverse/i386-avx-reverse.exp
@@ -1014,3 +1014,43 @@ if {[record_full_function "extract_insert"] == true} {
 }
 gdb_test "finish" "Run till exit from.*extract_insert_test.*" \
     "leaving extract_insert"
+
+# Preparation and testing blend instructions.
+gdb_test_no_output \
+    "set \$ymm0.v2_int128 = {0, 0}" "set ymm0 for blend"
+gdb_test_no_output \
+    "set \$ymm1.v16_int16 = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}" \
+    "set ymm1 for blend"
+gdb_test_no_output \
+    "set \$ymm2.v16_int16 = {17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32}" \
+    "set ymm2 for blend"
+gdb_test_no_output "set \$ymm15.v2_int128 = {0,0}" "set ymm15 for blend"
+
+if {[record_full_function "blend"] == true} {
+    test_one_register "vpblendvb" "ymm0" \
+	"0x180017000600050004000300120011, 0x20001f001e001d001c001b000a0009"
+    test_one_register "vpblendvb" "ymm15" \
+	"0x80007001600150004000300020001, 0x0"
+    test_one_register "vpblendd" "ymm15" \
+	"0x180007001600050004000300020011, 0x20000f001e000d000c000b000a0019"
+    test_one_register "vpblendd" "ymm0" \
+	"0x180017000600150004000300020001, 0x0"
+    test_one_register "vpblendw" "ymm0" \
+	"0x180017001600150014001300120011, 0x20001f001e001d001c001b001a0019"
+    test_one_register "vpblendw" "ymm15" \
+	"0x180017001600150014001300120011, 0x0"
+
+    test_one_register "vblendvpd" "ymm15" \
+	"0x80007000600050014001300120011, 0x10000f000e000d001c001b001a0019"
+    test_one_register "vblendvps" "ymm0" \
+	"0x180017000600050014001300020001, 0x0"
+    test_one_register "vblendpd" "ymm15" "0x0, 0x0"
+    test_one_register "vblendps" "ymm0" "0x0, 0x0"
+
+    gdb_test "record stop" "Process record is stopped.*" \
+	"delete history for blend_test"
+} else {
+    untested "couldn't run blend tests"
+}
+gdb_test "finish" "Run till exit from.*blend_test.*" \
+    "leaving blend"