ARM: Add support load/store multiple VFP registers

src/arm/assembler-arm.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 14 matching lines @@
 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 // OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // The original source code covered by the above license above has been
 // modified significantly by Google Inc.
 // Copyright 2010 the V8 project authors. All rights reserved.

[Karl Klose, 2011/04/06 06:52:56]

2011

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

 
 #include "v8.h"
 
 #if defined(V8_TARGET_ARCH_ARM)
 
 #include "arm/assembler-arm-inl.h"
 #include "serialize.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 1982 matching lines @@
 
 void Assembler::vstr(const SwVfpRegister src,
                      const MemOperand& operand,
                      const Condition cond) {
   ASSERT(!operand.rm().is_valid());
   ASSERT(operand.am_ == Offset);
   vldr(src, operand.rn(), operand.offset(), cond);
 }
 
 
+void  Assembler::vldm(BlockAddrMode am,
+                      Register base,
+                      DwVfpRegister first,
+                      DwVfpRegister last,
+                      Condition cond) {
+  // Instruction details available in ARM DDI 0406A, A8-626.
+  // cond(31-28) | 110(27-25)| PUDW1(26-20) | Rbase(19-16) |

[Rodolph Perfetta, 2011/04/05 18:16:39]

PUDW1 is bit 24-20.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+  // first(15-12) | 1010(11-8) | (count/2)

[Rodolph Perfetta, 2011/04/05 18:16:39]

It should be count*2.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+  ASSERT(CpuFeatures::IsEnabled(VFP3));
+  ASSERT_LE(first.code(), last.code());
+  ASSERT(am == ia || am == ia_w || am == db_w);

[Rodolph Perfetta, 2011/04/05 18:16:39]

if the base is r15 and writeback is on, the instruction is undefined, an assert
would be good.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+
+  int sd, d;
+  first.split_code(&sd, &d);
+  int count = last.code() - first.code() + 1;
+  emit(cond | B27 | B26 | am | d*B22 | B20 | base.code()*B16 | sd*B12 |
+       0xB*B8 | count*2);
+}
+
+
+void  Assembler::vstm(BlockAddrMode am,
+                      Register base,
+                      DwVfpRegister first,
+                      DwVfpRegister last,
+                      Condition cond) {

[Rodolph Perfetta, 2011/04/05 18:16:39]

same as above.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+  // Instruction details available in ARM DDI 0406A, A8-784.
+  // cond(31-28) | 110(27-25)| PUDW0(26-20) | Rbase(19-16) |
+  // first(15-12) | 1011(11-8) | (count/2)
+  ASSERT(CpuFeatures::IsEnabled(VFP3));
+  ASSERT_LE(first.code(), last.code());
+  ASSERT(am == ia || am == ia_w || am == db_w);
+
+  int sd, d;
+  first.split_code(&sd, &d);
+  int count = last.code() - first.code() + 1;
+  emit(cond | B27 | B26 | am | d*B22 | base.code()*B16 | sd*B12 |
+       0xB*B8 | count*2);
+}
+
+void  Assembler::vldm(BlockAddrMode am,
+                      Register base,
+                      SwVfpRegister first,
+                      SwVfpRegister last,
+                      Condition cond) {

[Rodolph Perfetta, 2011/04/05 18:16:39]

same as above.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+  // Instruction details available in ARM DDI 0406A, A8-626.
+  // cond(31-28) | 110(27-25)| PUDW1(26-20) | Rbase(19-16) |
+  // first(15-12) | 1010(11-8) | (count/2)
+  ASSERT(CpuFeatures::IsEnabled(VFP3));
+  ASSERT_LE(first.code(), last.code());
+  ASSERT(am == ia || am == ia_w || am == db_w);
+
+  int sd, d;
+  first.split_code(&sd, &d);
+  int count = last.code() - first.code() + 1;
+  emit(cond | B27 | B26 | am | d*B22 | B20 | base.code()*B16 | sd*B12 |
+       0xA*B8 | count);
+}
+
+
+void  Assembler::vstm(BlockAddrMode am,
+                      Register base,
+                      SwVfpRegister first,
+                      SwVfpRegister last,
+                      Condition cond) {

[Rodolph Perfetta, 2011/04/05 18:16:39]

same as above.

[Søren Thygesen Gjesse, 2011/04/06 08:00:09]

Done.

+  // Instruction details available in ARM DDI 0406A, A8-784.
+  // cond(31-28) | 110(27-25)| PUDW0(26-20) | Rbase(19-16) |
+  // first(15-12) | 1011(11-8) | (count/2)
+  ASSERT(CpuFeatures::IsEnabled(VFP3));
+  ASSERT_LE(first.code(), last.code());
+  ASSERT(am == ia || am == ia_w || am == db_w);
+
+  int sd, d;
+  first.split_code(&sd, &d);
+  int count = last.code() - first.code() + 1;
+  emit(cond | B27 | B26 | am | d*B22 | base.code()*B16 | sd*B12 |
+       0xA*B8 | count);
+}
+
 static void DoubleAsTwoUInt32(double d, uint32_t* lo, uint32_t* hi) {
   uint64_t i;
   memcpy(&i, &d, 8);
 
   *lo = i & 0xffffffff;
   *hi = i >> 32;
 }
 
 // Only works for little endian floating point formats.
 // We don't support VFP on the mixed endian floating point platform.
@@ skipping 738 matching lines @@
 
   // Since a constant pool was just emitted, move the check offset forward by
   // the standard interval.
   next_buffer_check_ = pc_offset() + kCheckConstInterval;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM