mirror/guile
mirror/guile
1
Fork 0
mirror of https://git.savannah.gnu.org/git/guile.git synced 2025-06-14 07:30:32 +02:00
Code Activity

Add sign-extending make-immediate instruction

Browse source 
* doc/ref/vm.texi (Instruction Set, Constant Instructions): Document new
  instruction.
* libguile/instructions.c (FOR_EACH_INSTRUCTION_WORD_TYPE): New first
  word kind with zi16 operand.
* libguile/jit.c (compile_make_immediate, compile_make_immediate_slow):
  New compilers.
  (COMPILE_X8_S8_ZI16): New operand kind.
* libguile/vm-engine.c (make-immediate): New instruction.
* module/language/bytecode.scm:
* module/system/vm/assembler.scm (encode-X8_S8_ZI16<-/shuffle):
  (signed-bits, load-constant): Support the new instruction kind.
* module/system/vm/disassembler.scm (disassemblers)
  (sign-extended-immediate, code-annotation): Support for zi16
  operands.
This commit is contained in:
Andy Wingo 2020-07-30 17:36:11 +02:00
parent f13b27a4cc
commit 172e5ccfc1
7 changed files with 88 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

18
libguile/vm-engine.c
View file

@ -1,4 +1,4 @@
/* Copyright 2001,2009-2015,2017-2019
/* Copyright 2001,2009-2015,2017-2020
Free Software Foundation, Inc.
This file is part of Guile.
@ -3401,7 +3401,21 @@ VM_NAME (scm_thread *thread)
NEXT (offset);
}
VM_DEFINE_OP (164, unused_164, NULL, NOP)
/* make-immediate dst:8 low-bits:16
*
* Make an immediate whose low bits are LOW-BITS, and whose top bits
* are sign-extended.
*/
VM_DEFINE_OP (164, make_immediate, "make-immediate", DOP1 (X8_S8_ZI16))
{
uint8_t dst;
int16_t val;
UNPACK_8_16 (op, dst, val);
SP_SET (dst, SCM_PACK ((scm_t_signed_bits) val));
NEXT (1);
}
VM_DEFINE_OP (165, unused_165, NULL, NOP)
VM_DEFINE_OP (166, unused_166, NULL, NOP)
VM_DEFINE_OP (167, unused_167, NULL, NOP)