Patchwork [v2,2/2] target-arm: Move Neon VZIP to helper functions

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Submitter Peter Maydell
Date Feb. 14, 2011, 10:22 a.m.
Message ID <1297678969-3433-3-git-send-email-peter.maydell@linaro.org>
Download mbox | patch
Permalink /patch/83059/
State New
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Comments

Peter Maydell - Feb. 14, 2011, 10:22 a.m.
Move the implementation of the Neon VUZP unzip instruction from inline
code to helper functions. (At 50+ TCG ops it was well over the
recommended limit for coding inline.) The helper implementations also
give the correct answers where the inline implementation did not.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target-arm/helpers.h     |    5 ++
 target-arm/neon_helper.c |   92 ++++++++++++++++++++++++++++++++++++++
 target-arm/translate.c   |  109 +++++++++++++++-------------------------------
 3 files changed, 133 insertions(+), 73 deletions(-)

Patch

diff --git a/target-arm/helpers.h b/target-arm/helpers.h
index 88c2fce..e494b47 100644
--- a/target-arm/helpers.h
+++ b/target-arm/helpers.h
@@ -465,5 +465,10 @@  DEF_HELPER_3(neon_unzip16, void, env, i32, i32)
 DEF_HELPER_3(neon_qunzip8, void, env, i32, i32)
 DEF_HELPER_3(neon_qunzip16, void, env, i32, i32)
 DEF_HELPER_3(neon_qunzip32, void, env, i32, i32)
+DEF_HELPER_3(neon_zip8, void, env, i32, i32)
+DEF_HELPER_3(neon_zip16, void, env, i32, i32)
+DEF_HELPER_3(neon_qzip8, void, env, i32, i32)
+DEF_HELPER_3(neon_qzip16, void, env, i32, i32)
+DEF_HELPER_3(neon_qzip32, void, env, i32, i32)
 
 #include "def-helper.h"
diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index 6e2a2fd..cee9ee4 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -1757,3 +1757,95 @@  void HELPER(neon_unzip16)(CPUState *env, uint32_t rd, uint32_t rm)
     env->vfp.regs[rm] = make_float64(m0);
     env->vfp.regs[rd] = make_float64(d0);
 }
+
+void HELPER(neon_qzip8)(CPUState *env, uint32_t rd, uint32_t rm)
+{
+    uint64_t zm0 = float64_val(env->vfp.regs[rm]);
+    uint64_t zm1 = float64_val(env->vfp.regs[rm + 1]);
+    uint64_t zd0 = float64_val(env->vfp.regs[rd]);
+    uint64_t zd1 = float64_val(env->vfp.regs[rd + 1]);
+    uint64_t d0 = ELEM(zd0, 0, 8) | (ELEM(zm0, 0, 8) << 8)
+        | (ELEM(zd0, 1, 8) << 16) | (ELEM(zm0, 1, 8) << 24)
+        | (ELEM(zd0, 2, 8) << 32) | (ELEM(zm0, 2, 8) << 40)
+        | (ELEM(zd0, 3, 8) << 48) | (ELEM(zm0, 3, 8) << 56);
+    uint64_t d1 = ELEM(zd0, 4, 8) | (ELEM(zm0, 4, 8) << 8)
+        | (ELEM(zd0, 5, 8) << 16) | (ELEM(zm0, 5, 8) << 24)
+        | (ELEM(zd0, 6, 8) << 32) | (ELEM(zm0, 6, 8) << 40)
+        | (ELEM(zd0, 7, 8) << 48) | (ELEM(zm0, 7, 8) << 56);
+    uint64_t m0 = ELEM(zd1, 0, 8) | (ELEM(zm1, 0, 8) << 8)
+        | (ELEM(zd1, 1, 8) << 16) | (ELEM(zm1, 1, 8) << 24)
+        | (ELEM(zd1, 2, 8) << 32) | (ELEM(zm1, 2, 8) << 40)
+        | (ELEM(zd1, 3, 8) << 48) | (ELEM(zm1, 3, 8) << 56);
+    uint64_t m1 = ELEM(zd1, 4, 8) | (ELEM(zm1, 4, 8) << 8)
+        | (ELEM(zd1, 5, 8) << 16) | (ELEM(zm1, 5, 8) << 24)
+        | (ELEM(zd1, 6, 8) << 32) | (ELEM(zm1, 6, 8) << 40)
+        | (ELEM(zd1, 7, 8) << 48) | (ELEM(zm1, 7, 8) << 56);
+    env->vfp.regs[rm] = make_float64(m0);
+    env->vfp.regs[rm + 1] = make_float64(m1);
+    env->vfp.regs[rd] = make_float64(d0);
+    env->vfp.regs[rd + 1] = make_float64(d1);
+}
+
+void HELPER(neon_qzip16)(CPUState *env, uint32_t rd, uint32_t rm)
+{
+    uint64_t zm0 = float64_val(env->vfp.regs[rm]);
+    uint64_t zm1 = float64_val(env->vfp.regs[rm + 1]);
+    uint64_t zd0 = float64_val(env->vfp.regs[rd]);
+    uint64_t zd1 = float64_val(env->vfp.regs[rd + 1]);
+    uint64_t d0 = ELEM(zd0, 0, 16) | (ELEM(zm0, 0, 16) << 16)
+        | (ELEM(zd0, 1, 16) << 32) | (ELEM(zm0, 1, 16) << 48);
+    uint64_t d1 = ELEM(zd0, 2, 16) | (ELEM(zm0, 2, 16) << 16)
+        | (ELEM(zd0, 3, 16) << 32) | (ELEM(zm0, 3, 16) << 48);
+    uint64_t m0 = ELEM(zd1, 0, 16) | (ELEM(zm1, 0, 16) << 16)
+        | (ELEM(zd1, 1, 16) << 32) | (ELEM(zm1, 1, 16) << 48);
+    uint64_t m1 = ELEM(zd1, 2, 16) | (ELEM(zm1, 2, 16) << 16)
+        | (ELEM(zd1, 3, 16) << 32) | (ELEM(zm1, 3, 16) << 48);
+    env->vfp.regs[rm] = make_float64(m0);
+    env->vfp.regs[rm + 1] = make_float64(m1);
+    env->vfp.regs[rd] = make_float64(d0);
+    env->vfp.regs[rd + 1] = make_float64(d1);
+}
+
+void HELPER(neon_qzip32)(CPUState *env, uint32_t rd, uint32_t rm)
+{
+    uint64_t zm0 = float64_val(env->vfp.regs[rm]);
+    uint64_t zm1 = float64_val(env->vfp.regs[rm + 1]);
+    uint64_t zd0 = float64_val(env->vfp.regs[rd]);
+    uint64_t zd1 = float64_val(env->vfp.regs[rd + 1]);
+    uint64_t d0 = ELEM(zd0, 0, 32) | (ELEM(zm0, 0, 32) << 32);
+    uint64_t d1 = ELEM(zd0, 1, 32) | (ELEM(zm0, 1, 32) << 32);
+    uint64_t m0 = ELEM(zd1, 0, 32) | (ELEM(zm1, 0, 32) << 32);
+    uint64_t m1 = ELEM(zd1, 1, 32) | (ELEM(zm1, 1, 32) << 32);
+    env->vfp.regs[rm] = make_float64(m0);
+    env->vfp.regs[rm + 1] = make_float64(m1);
+    env->vfp.regs[rd] = make_float64(d0);
+    env->vfp.regs[rd + 1] = make_float64(d1);
+}
+
+void HELPER(neon_zip8)(CPUState *env, uint32_t rd, uint32_t rm)
+{
+    uint64_t zm = float64_val(env->vfp.regs[rm]);
+    uint64_t zd = float64_val(env->vfp.regs[rd]);
+    uint64_t d0 = ELEM(zd, 0, 8) | (ELEM(zm, 0, 8) << 8)
+        | (ELEM(zd, 1, 8) << 16) | (ELEM(zm, 1, 8) << 24)
+        | (ELEM(zd, 2, 8) << 32) | (ELEM(zm, 2, 8) << 40)
+        | (ELEM(zd, 3, 8) << 48) | (ELEM(zm, 3, 8) << 56);
+    uint64_t m0 = ELEM(zd, 4, 8) | (ELEM(zm, 4, 8) << 8)
+        | (ELEM(zd, 5, 8) << 16) | (ELEM(zm, 5, 8) << 24)
+        | (ELEM(zd, 6, 8) << 32) | (ELEM(zm, 6, 8) << 40)
+        | (ELEM(zd, 7, 8) << 48) | (ELEM(zm, 7, 8) << 56);
+    env->vfp.regs[rm] = make_float64(m0);
+    env->vfp.regs[rd] = make_float64(d0);
+}
+
+void HELPER(neon_zip16)(CPUState *env, uint32_t rd, uint32_t rm)
+{
+    uint64_t zm = float64_val(env->vfp.regs[rm]);
+    uint64_t zd = float64_val(env->vfp.regs[rd]);
+    uint64_t d0 = ELEM(zd, 0, 16) | (ELEM(zm, 0, 16) << 16)
+        | (ELEM(zd, 1, 16) << 32) | (ELEM(zm, 1, 16) << 48);
+    uint64_t m0 = ELEM(zd, 2, 16) | (ELEM(zm, 2, 16) << 16)
+        | (ELEM(zd, 3, 16) << 32) | (ELEM(zm, 3, 16) << 48);
+    env->vfp.regs[rm] = make_float64(m0);
+    env->vfp.regs[rd] = make_float64(d0);
+}
diff --git a/target-arm/translate.c b/target-arm/translate.c
index 6d94223..50c8fe0 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -3653,59 +3653,43 @@  static int gen_neon_unzip(int rd, int rm, int size, int q)
     return 0;
 }
 
-static void gen_neon_zip_u8(TCGv t0, TCGv t1)
-{
-    TCGv rd, rm, tmp;
-
-    rd = new_tmp();
-    rm = new_tmp();
-    tmp = new_tmp();
-
-    tcg_gen_andi_i32(rd, t0, 0xff);
-    tcg_gen_shli_i32(tmp, t1, 8);
-    tcg_gen_andi_i32(tmp, tmp, 0xff00);
-    tcg_gen_or_i32(rd, rd, tmp);
-    tcg_gen_shli_i32(tmp, t0, 16);
-    tcg_gen_andi_i32(tmp, tmp, 0xff0000);
-    tcg_gen_or_i32(rd, rd, tmp);
-    tcg_gen_shli_i32(tmp, t1, 24);
-    tcg_gen_andi_i32(tmp, tmp, 0xff000000);
-    tcg_gen_or_i32(rd, rd, tmp);
-
-    tcg_gen_andi_i32(rm, t1, 0xff000000);
-    tcg_gen_shri_i32(tmp, t0, 8);
-    tcg_gen_andi_i32(tmp, tmp, 0xff0000);
-    tcg_gen_or_i32(rm, rm, tmp);
-    tcg_gen_shri_i32(tmp, t1, 8);
-    tcg_gen_andi_i32(tmp, tmp, 0xff00);
-    tcg_gen_or_i32(rm, rm, tmp);
-    tcg_gen_shri_i32(tmp, t0, 16);
-    tcg_gen_andi_i32(tmp, tmp, 0xff);
-    tcg_gen_or_i32(t1, rm, tmp);
-    tcg_gen_mov_i32(t0, rd);
-
-    dead_tmp(tmp);
-    dead_tmp(rm);
-    dead_tmp(rd);
-}
-
-static void gen_neon_zip_u16(TCGv t0, TCGv t1)
+static int gen_neon_zip(int rd, int rm, int size, int q)
 {
     TCGv tmp, tmp2;
-
-    tmp = new_tmp();
-    tmp2 = new_tmp();
-
-    tcg_gen_andi_i32(tmp, t0, 0xffff);
-    tcg_gen_shli_i32(tmp2, t1, 16);
-    tcg_gen_or_i32(tmp, tmp, tmp2);
-    tcg_gen_andi_i32(t1, t1, 0xffff0000);
-    tcg_gen_shri_i32(tmp2, t0, 16);
-    tcg_gen_or_i32(t1, t1, tmp2);
-    tcg_gen_mov_i32(t0, tmp);
-
-    dead_tmp(tmp2);
-    dead_tmp(tmp);
+    if (size == 3 || (!q && size == 2)) {
+        return 1;
+    }
+    tmp = tcg_const_i32(rd);
+    tmp2 = tcg_const_i32(rm);
+    if (q) {
+        switch (size) {
+        case 0:
+            gen_helper_neon_qzip8(cpu_env, tmp, tmp2);
+            break;
+        case 1:
+            gen_helper_neon_qzip16(cpu_env, tmp, tmp2);
+            break;
+        case 2:
+            gen_helper_neon_qzip32(cpu_env, tmp, tmp2);
+            break;
+        default:
+            abort();
+        }
+    } else {
+        switch (size) {
+        case 0:
+            gen_helper_neon_zip8(cpu_env, tmp, tmp2);
+            break;
+        case 1:
+            gen_helper_neon_zip16(cpu_env, tmp, tmp2);
+            break;
+        default:
+            abort();
+        }
+    }
+    tcg_temp_free_i32(tmp);
+    tcg_temp_free_i32(tmp2);
+    return 0;
 }
 
 static void gen_neon_trn_u8(TCGv t0, TCGv t1)
@@ -5425,29 +5409,8 @@  static int disas_neon_data_insn(CPUState * env, DisasContext *s, uint32_t insn)
                     }
                     break;
                 case 35: /* VZIP */
-                    /* Reg  Before       After
-                       Rd   A3 A2 A1 A0  B1 A1 B0 A0
-                       Rm   B3 B2 B1 B0  B3 A3 B2 A2
-                     */
-                    if (size == 3)
+                    if (gen_neon_zip(rd, rm, size, q)) {
                         return 1;
-                    count = (q ? 4 : 2);
-                    for (n = 0; n < count; n++) {
-                        tmp = neon_load_reg(rd, n);
-                        tmp2 = neon_load_reg(rd, n);
-                        switch (size) {
-                        case 0: gen_neon_zip_u8(tmp, tmp2); break;
-                        case 1: gen_neon_zip_u16(tmp, tmp2); break;
-                        case 2: /* no-op */; break;
-                        default: abort();
-                        }
-                        neon_store_scratch(n * 2, tmp);
-                        neon_store_scratch(n * 2 + 1, tmp2);
-                    }
-                    for (n = 0; n < count * 2; n++) {
-                        int reg = (n < count) ? rd : rm;
-                        tmp = neon_load_scratch(n);
-                        neon_store_reg(reg, n % count, tmp);
                     }
                     break;
                 case 36: case 37: /* VMOVN, VQMOVUN, VQMOVN */