[Qemu-devel] [6171] Add vsldoi instruction.

[Aurelien Jarno]

Revision: 6171
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=6171
Author:   aurel32
Date:     2009-01-04 22:10:09 +0000 (Sun, 04 Jan 2009)

Log Message:
-----------
Add vsldoi instruction.

Signed-off-by: Nathan Froyd <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>

Modified Paths:
--------------
    trunk/target-ppc/helper.h
    trunk/target-ppc/op_helper.c
    trunk/target-ppc/translate.c

Modified: trunk/target-ppc/helper.h
===================================================================
--- trunk/target-ppc/helper.h   2009-01-04 22:09:52 UTC (rev 6170)
+++ trunk/target-ppc/helper.h   2009-01-04 22:10:09 UTC (rev 6171)
@@ -155,6 +155,7 @@
 DEF_HELPER_3(vrlb, void, avr, avr, avr)
 DEF_HELPER_3(vrlh, void, avr, avr, avr)
 DEF_HELPER_3(vrlw, void, avr, avr, avr)
+DEF_HELPER_4(vsldoi, void, avr, avr, avr, i32)
 
 DEF_HELPER_1(efscfsi, i32, i32)
 DEF_HELPER_1(efscfui, i32, i32)

Modified: trunk/target-ppc/op_helper.c
===================================================================
--- trunk/target-ppc/op_helper.c        2009-01-04 22:09:52 UTC (rev 6170)
+++ trunk/target-ppc/op_helper.c        2009-01-04 22:10:09 UTC (rev 6171)
@@ -2145,6 +2145,34 @@
 VSL(w, u32)
 #undef VSL
 
+void helper_vsldoi (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b, uint32_t shift)
+{
+    int sh = shift & 0xf;
+    int i;
+    ppc_avr_t result;
+
+#if defined(WORDS_BIGENDIAN)
+    for (i = 0; i < ARRAY_SIZE(r->u8); i++) {
+        int index = sh + i;
+        if (index > 0xf) {
+            result.u8[i] = b->u8[index-0x10];
+        } else {
+            result.u8[i] = a->u8[index];
+        }
+    }
+#else
+    for (i = 0; i < ARRAY_SIZE(r->u8); i++) {
+        int index = (16 - sh) + i;
+        if (index > 0xf) {
+            result.u8[i] = a->u8[index-0x10];
+        } else {
+            result.u8[i] = b->u8[index];
+        }
+    }
+#endif
+    *r = result;
+}
+
 void helper_vslo (ppc_avr_t *r, ppc_avr_t *a, ppc_avr_t *b)
 {
   int sh = (b->u8[LO_IDX*0xf] >> 3) & 0xf;

Modified: trunk/target-ppc/translate.c
===================================================================
--- trunk/target-ppc/translate.c        2009-01-04 22:09:52 UTC (rev 6170)
+++ trunk/target-ppc/translate.c        2009-01-04 22:10:09 UTC (rev 6171)
@@ -374,6 +374,8 @@
 EXTRACT_HELPER(NB, 11, 5);
 /* Shift count */
 EXTRACT_HELPER(SH, 11, 5);
+/* Vector shift count */
+EXTRACT_HELPER(VSH, 6, 4);
 /* Mask start */
 EXTRACT_HELPER(MB, 6, 5);
 /* Mask end */
@@ -6268,6 +6270,25 @@
 GEN_VXFORM(vrlh, 2, 1);
 GEN_VXFORM(vrlw, 2, 2);
 
+GEN_HANDLER(vsldoi, 0x04, 0x16, 0xFF, 0x00000400, PPC_ALTIVEC)
+{
+    TCGv_ptr ra, rb, rd;
+    TCGv sh;
+    if (unlikely(!ctx->altivec_enabled)) {
+        gen_exception(ctx, POWERPC_EXCP_VPU);
+        return;
+    }
+    ra = gen_avr_ptr(rA(ctx->opcode));
+    rb = gen_avr_ptr(rB(ctx->opcode));
+    rd = gen_avr_ptr(rD(ctx->opcode));
+    sh = tcg_const_i32(VSH(ctx->opcode));
+    gen_helper_vsldoi (rd, ra, rb, sh);
+    tcg_temp_free_ptr(ra);
+    tcg_temp_free_ptr(rb);
+    tcg_temp_free_ptr(rd);
+    tcg_temp_free(sh);
+}
+
 /***                           SPE extension                               ***/
 /* Register moves */