openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

target-arm: Refactor to pull narrowing decode into separate function 

Pull the code which decodes narrowing operations as being either
signed/unsigned saturate or plain out into its own function.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-02-21 11:05:21 +00:00 committed by Aurelien Jarno
parent 57a8821bc6
commit c33171c7f2
1 changed files with 19 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
target-arm/translate.c
View File

@ -4164,6 +4164,23 @@ static inline void gen_neon_mull(TCGv_i64 dest, TCGv a, TCGv b, int size, int u)
}
}
static void gen_neon_narrow_op(int op, int u, int size, TCGv dest, TCGv_i64 src)
{
if (op) {
if (u) {
gen_neon_unarrow_sats(size, dest, src);
} else {
gen_neon_narrow(size, dest, src);
}
} else {
if (u) {
gen_neon_narrow_satu(size, dest, src);
} else {
gen_neon_narrow_sats(size, dest, src);
}
}
}
/* Translate a NEON data processing instruction. Return nonzero if the
instruction is invalid.
We process data in a mixture of 32-bit and 64-bit chunks.
@ -4839,19 +4856,7 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
dead_tmp(tmp3);
}
tmp = new_tmp();
if (op == 8) {
if (u) { /* VQSHRUN / VQRSHRUN */
gen_neon_unarrow_sats(size - 1, tmp, cpu_V0);
} else { /* VSHRN / VRSHRN */
gen_neon_narrow(size - 1, tmp, cpu_V0);
}
} else {
if (u) { /* VQSHRN / VQRSHRN */
gen_neon_narrow_satu(size - 1, tmp, cpu_V0);
} else { /* VQSHRN / VQRSHRN */
gen_neon_narrow_sats(size - 1, tmp, cpu_V0);
}
}
gen_neon_narrow_op(op == 8, u, size - 1, tmp, cpu_V0);
neon_store_reg(rd, pass, tmp);
} /* for pass */
if (size == 3) {
@ -5439,19 +5444,7 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
for (pass = 0; pass < 2; pass++) {
neon_load_reg64(cpu_V0, rm + pass);
tmp = new_tmp();
if (op == 36) {
if (q) { /* VQMOVUN */
gen_neon_unarrow_sats(size, tmp, cpu_V0);
} else { /* VMOVN */
gen_neon_narrow(size, tmp, cpu_V0);
}
} else { /* VQMOVN */
if (q) {
gen_neon_narrow_satu(size, tmp, cpu_V0);
} else {
gen_neon_narrow_sats(size, tmp, cpu_V0);
}
}
gen_neon_narrow_op(op == 36, q, size, tmp, cpu_V0);
if (pass == 0) {
tmp2 = tmp;
} else {