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target-arm: Fix Neon VQDMLSL instruction 

For VQDMLSL, negation has to occur after saturation, not before.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Peter Maydell 2011-02-11 12:26:48 +00:00 committed by Aurelien Jarno
parent ebcd88ceb5
commit 4dc064e66e
1 changed files with 14 additions and 8 deletions
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22
target-arm/translate.c
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@ -5137,16 +5137,19 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
neon_store_reg64(cpu_V0, rd + pass);
} else if (op == 5 || (op >= 8 && op <= 11)) {
/* Accumulate. */
if (op == 10 || op == 11) {
gen_neon_negl(cpu_V0, size);
}
neon_load_reg64(cpu_V1, rd + pass);
switch (op) {
case 5: case 8: case 10: /* VABAL, VMLAL, VMLSL */
case 10: /* VMLSL */
gen_neon_negl(cpu_V0, size);
/* Fall through */
case 5: case 8: /* VABAL, VMLAL */
gen_neon_addl(size);
break;
case 9: case 11: /* VQDMLAL, VQDMLSL */
gen_neon_addl_saturate(cpu_V0, cpu_V0, size);
if (op == 11) {
gen_neon_negl(cpu_V0, size);
}
gen_neon_addl_saturate(cpu_V0, cpu_V1, size);
break;
default:
@ -5284,18 +5287,21 @@ static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
tmp2 = tmp4;
}
gen_neon_mull(cpu_V0, tmp, tmp2, size, u);
if (op == 6 || op == 7) {
gen_neon_negl(cpu_V0, size);
}
if (op != 11) {
neon_load_reg64(cpu_V1, rd + pass);
}
switch (op) {
case 2: case 6:
case 6:
gen_neon_negl(cpu_V0, size);
/* Fall through */
case 2:
gen_neon_addl(size);
break;
case 3: case 7:
gen_neon_addl_saturate(cpu_V0, cpu_V0, size);
if (op == 7) {
gen_neon_negl(cpu_V0, size);
}
gen_neon_addl_saturate(cpu_V0, cpu_V1, size);
break;
case 10: