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authorTom Musta <tommusta@gmail.com>2013-11-01 08:21:21 -0500
committerAlexander Graf <agraf@suse.de>2013-12-20 01:58:07 +0100
commit551e3ef72e59d3975073e2ea3aaf2f7508323063 (patch)
treef1564f9fe86f9a1c5306f92f1878d1d409cc2ef7
parentce577d2e48e756f17d4c4a6c6bdc96924a157ca0 (diff)
downloadqemu-arm-551e3ef72e59d3975073e2ea3aaf2f7508323063.tar.gz
Add xxsel
This patch adds the VSX Select (xxsel) instruction. The xxsel instruction has four VSR operands. Thus the xC instruction decoder is added. The xxsel instruction is massively overloaded in the opcode table since only bits 26 and 27 are opcode bits. This overloading is done in matrix fashion with two macros (GEN_XXSEL_ROW and GEN_XX_SEL). V2: (1) eliminated unecessary XXSEL macro (2) tighter implementation using tcg_gen_andc_i64. Signed-off-by: Tom Musta <tommusta@gmail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--target-ppc/translate.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 75226fa402..e5d7f9d3aa 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -497,6 +497,7 @@ EXTRACT_HELPER_SPLIT(xT, 0, 1, 21, 5);
EXTRACT_HELPER_SPLIT(xS, 0, 1, 21, 5);
EXTRACT_HELPER_SPLIT(xA, 2, 1, 16, 5);
EXTRACT_HELPER_SPLIT(xB, 1, 1, 11, 5);
+EXTRACT_HELPER_SPLIT(xC, 3, 1, 6, 5);
EXTRACT_HELPER(DM, 8, 2);
/*****************************************************************************/
/* PowerPC instructions table */
@@ -7325,6 +7326,38 @@ static void glue(gen_, name)(DisasContext * ctx) \
VSX_XXMRG(xxmrghw, 1)
VSX_XXMRG(xxmrglw, 0)
+static void gen_xxsel(DisasContext * ctx)
+{
+ TCGv_i64 a, b, c;
+ if (unlikely(!ctx->vsx_enabled)) {
+ gen_exception(ctx, POWERPC_EXCP_VSXU);
+ return;
+ }
+ a = tcg_temp_new();
+ b = tcg_temp_new();
+ c = tcg_temp_new();
+
+ tcg_gen_mov_i64(a, cpu_vsrh(xA(ctx->opcode)));
+ tcg_gen_mov_i64(b, cpu_vsrh(xB(ctx->opcode)));
+ tcg_gen_mov_i64(c, cpu_vsrh(xC(ctx->opcode)));
+
+ tcg_gen_and_i64(b, b, c);
+ tcg_gen_andc_i64(a, a, c);
+ tcg_gen_or_i64(cpu_vsrh(xT(ctx->opcode)), a, b);
+
+ tcg_gen_mov_i64(a, cpu_vsrl(xA(ctx->opcode)));
+ tcg_gen_mov_i64(b, cpu_vsrl(xB(ctx->opcode)));
+ tcg_gen_mov_i64(c, cpu_vsrl(xC(ctx->opcode)));
+
+ tcg_gen_and_i64(b, b, c);
+ tcg_gen_andc_i64(a, a, c);
+ tcg_gen_or_i64(cpu_vsrl(xT(ctx->opcode)), a, b);
+
+ tcg_temp_free(a);
+ tcg_temp_free(b);
+ tcg_temp_free(c);
+}
+
/*** SPE extension ***/
/* Register moves */
@@ -9840,6 +9873,49 @@ VSX_LOGICAL(xxlnor, 0x8, 0x14, PPC2_VSX),
GEN_XX3FORM(xxmrghw, 0x08, 0x02, PPC2_VSX),
GEN_XX3FORM(xxmrglw, 0x08, 0x06, PPC2_VSX),
+#define GEN_XXSEL_ROW(opc3) \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x18, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x19, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1A, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1B, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1C, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1D, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1E, opc3, 0, PPC_NONE, PPC2_VSX), \
+GEN_HANDLER2_E(xxsel, "xxsel", 0x3C, 0x1F, opc3, 0, PPC_NONE, PPC2_VSX), \
+
+GEN_XXSEL_ROW(0x00)
+GEN_XXSEL_ROW(0x01)
+GEN_XXSEL_ROW(0x02)
+GEN_XXSEL_ROW(0x03)
+GEN_XXSEL_ROW(0x04)
+GEN_XXSEL_ROW(0x05)
+GEN_XXSEL_ROW(0x06)
+GEN_XXSEL_ROW(0x07)
+GEN_XXSEL_ROW(0x08)
+GEN_XXSEL_ROW(0x09)
+GEN_XXSEL_ROW(0x0A)
+GEN_XXSEL_ROW(0x0B)
+GEN_XXSEL_ROW(0x0C)
+GEN_XXSEL_ROW(0x0D)
+GEN_XXSEL_ROW(0x0E)
+GEN_XXSEL_ROW(0x0F)
+GEN_XXSEL_ROW(0x10)
+GEN_XXSEL_ROW(0x11)
+GEN_XXSEL_ROW(0x12)
+GEN_XXSEL_ROW(0x13)
+GEN_XXSEL_ROW(0x14)
+GEN_XXSEL_ROW(0x15)
+GEN_XXSEL_ROW(0x16)
+GEN_XXSEL_ROW(0x17)
+GEN_XXSEL_ROW(0x18)
+GEN_XXSEL_ROW(0x19)
+GEN_XXSEL_ROW(0x1A)
+GEN_XXSEL_ROW(0x1B)
+GEN_XXSEL_ROW(0x1C)
+GEN_XXSEL_ROW(0x1D)
+GEN_XXSEL_ROW(0x1E)
+GEN_XXSEL_ROW(0x1F)
+
GEN_XX3FORM_DM(xxpermdi, 0x08, 0x01),
#undef GEN_SPE