Implement the jit_align interface - lightning.git - Portable just-in-time compiler library

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authorpcpa <paulo.cesar.pereira.de.andrade@gmail.com>2014年10月14日 17:05:25 -0300
committerpcpa <paulo.cesar.pereira.de.andrade@gmail.com>2014年10月14日 17:05:25 -0300
commitafae5407f67646254c868a9fde6da97609d5f69d (patch)
treef50e3a56cb2acfde87ad64cb1441b38cdec3cabb /lib/jit_arm.c
parentdbb1bb24099caad8e106a1b80f831b131b3d8e87 (diff)
downloadlightning-afae5407f67646254c868a9fde6da97609d5f69d.tar.gz
Implement the jit_align interface
* lib/jit_aarch64-cpu.c, lib/jit_alpha-cpu.c, lib/jit_arm-cpu.c, lib/jit_hppa-cpu.c, lib/jit_mips-cpu.c, lib/jit_ppc-cpu.c, lib/jit_sparc-cpu.c: Implement or correct the internal nop(count) call that receives an argument that tells the modulo bytes to align the code for the next instruction. * include/lightning.h, lib/lightning.c, lib/jit_aarch64.c, lib/jit_alpha.c, lib/jit_arm.c, lib/jit_hppa.c, lib/jit_ia64.c, lib/jit_mips.c, lib/jit_ppc.c, lib/jit_s390x.c, lib/jit_sparc.c, lib/jit_x86.c: Implement the new jit_align() call that receive an argument, that tells the modulo, in bytes, to align the next instruction. In most backends the only value that makes a difference is a value that matches sizeof(void*), as all other values usually are already automatically aligned in labels, but not guaranteed to be aligned at word size bytes. * check/align.ok, check/align.tst: New files, implementing a simple test for the new jit_align() interface. * check/Makefile.am, check/lightning.c, lib/jit_aarch64-sz.c, lib/jit_alpha-sz.c, lib/jit_arm-sz.c, lib/jit_hppa-sz.c, lib/jit_ia64-sz.c, lib/jit_mips-sz.c, lib/jit_ppc-sz.c, lib/jit_print.c, lib/jit_s390x-sz.c, lib/jit_sparc-sz.c, lib/jit_x86-sz.c: Update for the new jit_code_align code and the jit_align() interface.
Diffstat (limited to 'lib/jit_arm.c')
-rw-r--r--lib/jit_arm.c 7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/jit_arm.c b/lib/jit_arm.c
index 7dbf78a..179bf68 100644
--- a/lib/jit_arm.c
+++ b/lib/jit_arm.c
@@ -1043,6 +1043,13 @@ _emit_code(jit_state_t *_jit)
value = jit_classify(node->code);
jit_regarg_set(node, value);
switch (node->code) {
+ case jit_code_align:
+ assert(!(node->u.w & (node->u.w - 1)) &&
+ node->u.w <= sizeof(jit_word_t));
+ if (node->u.w == sizeof(jit_word_t) &&
+ (word = _jit->pc.w & (sizeof(jit_word_t) - 1)))
+ nop(sizeof(jit_word_t) - word);
+ break;
case jit_code_note: case jit_code_name:
if (must_align_p(node->next))
nop(2);
generated by cgit v1.2.3 (git 2.39.1) at 2025年09月17日 12:58:14 +0000

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