summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorPeter Maydell2020-06-16 11:32:26 +0200
committerPeter Maydell2020-06-16 11:32:26 +0200
commit9546ca5998d3cbd98a81b2d46a2e92a11b0f78a4 (patch)
treebcf3325ced48a3eb9a4a898722146e9448038a60
parenttarget/arm: Convert Neon 3-reg-diff long multiplies (diff)
downloadqemu-9546ca5998d3cbd98a81b2d46a2e92a11b0f78a4.tar.gz
qemu-9546ca5998d3cbd98a81b2d46a2e92a11b0f78a4.tar.xz
qemu-9546ca5998d3cbd98a81b2d46a2e92a11b0f78a4.zip
target/arm: Convert Neon 3-reg-diff saturating doubling multiplies
Convert the Neon 3-reg-diff insns VQDMULL, VQDMLAL and VQDMLSL: these are all saturating doubling long multiplies with a possible accumulate step. These are the last insns in the group which use the pass-over-each elements loop, so we can delete that code. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
-rw-r--r--target/arm/neon-dp.decode6
-rw-r--r--target/arm/translate-neon.inc.c82
-rw-r--r--target/arm/translate.c59
3 files changed, 92 insertions, 55 deletions
diff --git a/target/arm/neon-dp.decode b/target/arm/neon-dp.decode
index 1da492df14..65ea30d3ed 100644
--- a/target/arm/neon-dp.decode
+++ b/target/arm/neon-dp.decode
@@ -454,10 +454,16 @@ Vimm_1r 1111 001 . 1 . 000 ... .... cmode:4 0 . op:1 1 .... @1reg_imm
VMLAL_S_3d 1111 001 0 1 . .. .... .... 1000 . 0 . 0 .... @3diff
VMLAL_U_3d 1111 001 1 1 . .. .... .... 1000 . 0 . 0 .... @3diff
+ VQDMLAL_3d 1111 001 0 1 . .. .... .... 1001 . 0 . 0 .... @3diff
+
VMLSL_S_3d 1111 001 0 1 . .. .... .... 1010 . 0 . 0 .... @3diff
VMLSL_U_3d 1111 001 1 1 . .. .... .... 1010 . 0 . 0 .... @3diff
+ VQDMLSL_3d 1111 001 0 1 . .. .... .... 1011 . 0 . 0 .... @3diff
+
VMULL_S_3d 1111 001 0 1 . .. .... .... 1100 . 0 . 0 .... @3diff
VMULL_U_3d 1111 001 1 1 . .. .... .... 1100 . 0 . 0 .... @3diff
+
+ VQDMULL_3d 1111 001 0 1 . .. .... .... 1101 . 0 . 0 .... @3diff
]
}
diff --git a/target/arm/translate-neon.inc.c b/target/arm/translate-neon.inc.c
index c435f0685d..083e3af8c5 100644
--- a/target/arm/translate-neon.inc.c
+++ b/target/arm/translate-neon.inc.c
@@ -2222,3 +2222,85 @@ DO_VMLAL(VMLAL_S,mull_s,add)
DO_VMLAL(VMLAL_U,mull_u,add)
DO_VMLAL(VMLSL_S,mull_s,sub)
DO_VMLAL(VMLSL_U,mull_u,sub)
+
+static void gen_VQDMULL_16(TCGv_i64 rd, TCGv_i32 rn, TCGv_i32 rm)
+{
+ gen_helper_neon_mull_s16(rd, rn, rm);
+ gen_helper_neon_addl_saturate_s32(rd, cpu_env, rd, rd);
+}
+
+static void gen_VQDMULL_32(TCGv_i64 rd, TCGv_i32 rn, TCGv_i32 rm)
+{
+ gen_mull_s32(rd, rn, rm);
+ gen_helper_neon_addl_saturate_s64(rd, cpu_env, rd, rd);
+}
+
+static bool trans_VQDMULL_3d(DisasContext *s, arg_3diff *a)
+{
+ static NeonGenTwoOpWidenFn * const opfn[] = {
+ NULL,
+ gen_VQDMULL_16,
+ gen_VQDMULL_32,
+ NULL,
+ };
+
+ return do_long_3d(s, a, opfn[a->size], NULL);
+}
+
+static void gen_VQDMLAL_acc_16(TCGv_i64 rd, TCGv_i64 rn, TCGv_i64 rm)
+{
+ gen_helper_neon_addl_saturate_s32(rd, cpu_env, rn, rm);
+}
+
+static void gen_VQDMLAL_acc_32(TCGv_i64 rd, TCGv_i64 rn, TCGv_i64 rm)
+{
+ gen_helper_neon_addl_saturate_s64(rd, cpu_env, rn, rm);
+}
+
+static bool trans_VQDMLAL_3d(DisasContext *s, arg_3diff *a)
+{
+ static NeonGenTwoOpWidenFn * const opfn[] = {
+ NULL,
+ gen_VQDMULL_16,
+ gen_VQDMULL_32,
+ NULL,
+ };
+ static NeonGenTwo64OpFn * const accfn[] = {
+ NULL,
+ gen_VQDMLAL_acc_16,
+ gen_VQDMLAL_acc_32,
+ NULL,
+ };
+
+ return do_long_3d(s, a, opfn[a->size], accfn[a->size]);
+}
+
+static void gen_VQDMLSL_acc_16(TCGv_i64 rd, TCGv_i64 rn, TCGv_i64 rm)
+{
+ gen_helper_neon_negl_u32(rm, rm);
+ gen_helper_neon_addl_saturate_s32(rd, cpu_env, rn, rm);
+}
+
+static void gen_VQDMLSL_acc_32(TCGv_i64 rd, TCGv_i64 rn, TCGv_i64 rm)
+{
+ tcg_gen_neg_i64(rm, rm);
+ gen_helper_neon_addl_saturate_s64(rd, cpu_env, rn, rm);
+}
+
+static bool trans_VQDMLSL_3d(DisasContext *s, arg_3diff *a)
+{
+ static NeonGenTwoOpWidenFn * const opfn[] = {
+ NULL,
+ gen_VQDMULL_16,
+ gen_VQDMULL_32,
+ NULL,
+ };
+ static NeonGenTwo64OpFn * const accfn[] = {
+ NULL,
+ gen_VQDMLSL_acc_16,
+ gen_VQDMLSL_acc_32,
+ NULL,
+ };
+
+ return do_long_3d(s, a, opfn[a->size], accfn[a->size]);
+}
diff --git a/target/arm/translate.c b/target/arm/translate.c
index a2c47d19f2..88e91845c0 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -5247,11 +5247,11 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
{0, 0, 0, 7}, /* VSUBHN: handled by decodetree */
{0, 0, 0, 7}, /* VABDL */
{0, 0, 0, 7}, /* VMLAL */
- {0, 0, 0, 9}, /* VQDMLAL */
+ {0, 0, 0, 7}, /* VQDMLAL */
{0, 0, 0, 7}, /* VMLSL */
- {0, 0, 0, 9}, /* VQDMLSL */
+ {0, 0, 0, 7}, /* VQDMLSL */
{0, 0, 0, 7}, /* Integer VMULL */
- {0, 0, 0, 9}, /* VQDMULL */
+ {0, 0, 0, 7}, /* VQDMULL */
{0, 0, 0, 0xa}, /* Polynomial VMULL */
{0, 0, 0, 7}, /* Reserved: always UNDEF */
};
@@ -5282,58 +5282,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
}
return 0;
}
-
- /* Avoid overlapping operands. Wide source operands are
- always aligned so will never overlap with wide
- destinations in problematic ways. */
- if (rd == rm) {
- tmp = neon_load_reg(rm, 1);
- neon_store_scratch(2, tmp);
- } else if (rd == rn) {
- tmp = neon_load_reg(rn, 1);
- neon_store_scratch(2, tmp);
- }
- tmp3 = NULL;
- for (pass = 0; pass < 2; pass++) {
- if (pass == 1 && rd == rn) {
- tmp = neon_load_scratch(2);
- } else {
- tmp = neon_load_reg(rn, pass);
- }
- if (pass == 1 && rd == rm) {
- tmp2 = neon_load_scratch(2);
- } else {
- tmp2 = neon_load_reg(rm, pass);
- }
- switch (op) {
- case 9: case 11: case 13:
- /* VQDMLAL, VQDMLSL, VQDMULL */
- gen_neon_mull(cpu_V0, tmp, tmp2, size, u);
- break;
- default: /* 15 is RESERVED: caught earlier */
- abort();
- }
- if (op == 13) {
- /* VQDMULL */
- gen_neon_addl_saturate(cpu_V0, cpu_V0, size);
- neon_store_reg64(cpu_V0, rd + pass);
- } else {
- /* Accumulate. */
- neon_load_reg64(cpu_V1, rd + pass);
- switch (op) {
- 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:
- abort();
- }
- neon_store_reg64(cpu_V0, rd + pass);
- }
- }
+ abort(); /* all others handled by decodetree */
} else {
/* Two registers and a scalar. NB that for ops of this form
* the ARM ARM labels bit 24 as Q, but it is in our variable