Add new Lightning rbitr instruction. - lightning.git - Portable just-in-time compiler library

Portable just-in-time compiler library

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author	pcpa <paulo.cesar.pereira.de.andrade@gmail.com>	2023年02月28日 17:47:20 -0300
committer	pcpa <paulo.cesar.pereira.de.andrade@gmail.com>	2023年02月28日 17:47:20 -0300
commit	b71ab4f1b8fe533d943de7ea5ce4aa724cf10e7b (patch)
tree	cb9909113687e780528d8dc7036e66850fe65dd8 /lib/jit_x86.c
parent	9ddb79b50e5cd401ee35c994a47986148e5dfb15 (diff)
download	lightning-b71ab4f1b8fe533d943de7ea5ce4aa724cf10e7b.tar.gz

Add new Lightning rbitr instruction.

This instruction reverses the bits of a word. A possible extension could be a instruction that reverses the bits in every byte, and/or if there is valid high usage, have typed versions, like bswapr_T. This instruction is made available as it is used internally in some backends to implement count trailing ones or zeros.

Diffstat (limited to 'lib/jit_x86.c')

-rw-r--r--

lib/jit_x86.c

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/jit_x86.c b/lib/jit_x86.c
index b409457..10a6ec9 100644
--- a/lib/jit_x86.c
+++ b/lib/jit_x86.c

@@ -140,6 +140,7 @@ static void _x87_from_sse_d(jit_state_t*,jit_int32_t,jit_int32_t);

# include "jit_x86-cpu.c"

# include "jit_x86-sse.c"

# include "jit_x86-x87.c"

+# include "jit_fallback.c"

#undef PROTO

@@ -1809,6 +1810,8 @@ _emit_code(jit_state_t *_jit)

case_rr(clz,);

case_rr(cto,);

case_rr(ctz,);

+#define rbitr(r0, r1) fallback_bitswap(r0, r1)

+ case_rr(rbit,);

case_rrr(lt,);

case_rrw(lt,);

case_rrr(lt, _u);

@@ -2426,6 +2429,7 @@ _emit_code(jit_state_t *_jit)

# include "jit_x86-cpu.c"

# include "jit_x86-sse.c"

# include "jit_x86-x87.c"

+# include "jit_fallback.c"

#undef CODE

void

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