mips: Correct signed qrsh with zero shift. - lightning.git - Portable just-in-time compiler library

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authorpcpa <paulo.cesar.pereira.de.andrade@gmail.com>2023年10月03日 14:11:15 -0300
committerpcpa <paulo.cesar.pereira.de.andrade@gmail.com>2023年10月03日 14:11:15 -0300
commitcd2d978c44f2592c77e595ed1e9e1673bdf68694 (patch)
tree14bbbbd2c9f32ed0750c7936883037aaa59593c0 /lib/jit_mips-cpu.c
parent963cc88c7c09d87e06ea156eac13b27fb51e7f01 (diff)
downloadlightning-cd2d978c44f2592c77e595ed1e9e1673bdf68694.tar.gz
mips: Correct signed qrsh with zero shift.
Like the aarch64 version, relies on wordsize shift filling the result with zero or minus one, based on sign.
Diffstat (limited to 'lib/jit_mips-cpu.c')
-rw-r--r--lib/jit_mips-cpu.c 15
1 files changed, 3 insertions, 12 deletions
diff --git a/lib/jit_mips-cpu.c b/lib/jit_mips-cpu.c
index 8350bf8..e59743e 100644
--- a/lib/jit_mips-cpu.c
+++ b/lib/jit_mips-cpu.c
@@ -2471,10 +2471,7 @@ _xrshr(jit_state_t *_jit, jit_bool_t sign,
/* zero */
flush();
patch_at(zero, _jit->pc.w);
- if (sign)
- rshi(r1, t2, __WORDSIZE - 1);
- else
- movi(r1, 0);
+ movi(r1, 0);
flush();
patch_at(done, _jit->pc.w);
patch_at(done_over, _jit->pc.w);
@@ -2482,10 +2479,7 @@ _xrshr(jit_state_t *_jit, jit_bool_t sign,
}
else {
/* zero? */
- if (sign)
- rshi(t0, t2, __WORDSIZE - 1);
- else
- movi(t0, 0);
+ movi(t0, 0);
movzr(r1, t0, t3);
/* underflow? */
eqi(t1, t3, __WORDSIZE);
@@ -2505,10 +2499,7 @@ _xrshi(jit_state_t *_jit, jit_bool_t sign,
{
if (i0 == 0) {
movr(r0, r2);
- if (sign)
- rshi(r1, r2, __WORDSIZE - 1);
- else
- movi(r1, 0);
+ movi(r1, 0);
}
else if (i0 == __WORDSIZE) {
movr(r1, r2);
generated by cgit v1.2.3 (git 2.39.1) at 2025年09月10日 23:50:46 +0000

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