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[Qemu-devel] [PATCH 13/21] target-arm: A64: Implement scalar pairwise op
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 13/21] target-arm: A64: Implement scalar pairwise ops |
Date: |
Sun, 26 Jan 2014 19:25:04 +0000 |
Implement the instructions in the scalar pairwise group (C3.6.8).
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/translate-a64.c | 114 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 113 insertions(+), 1 deletion(-)
diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index 81119a0..881e9eb 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -5529,7 +5529,119 @@ static void disas_simd_scalar_copy(DisasContext *s,
uint32_t insn)
*/
static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
{
- unsupported_encoding(s, insn);
+ int u = extract32(insn, 29, 1);
+ int size = extract32(insn, 22, 2);
+ int opcode = extract32(insn, 12, 5);
+ int rn = extract32(insn, 5, 5);
+ int rd = extract32(insn, 0, 5);
+ TCGv_ptr fpst;
+
+ /* For some ops (the FP ones), size[1] is part of the encoding.
+ * For ADDP strictly it is not but size[1] is always 1 for valid
+ * encodings.
+ */
+ opcode |= (extract32(size, 1, 1) << 5);
+
+ switch (opcode) {
+ case 0x3b: /* ADDP */
+ if (u || size != 3) {
+ unallocated_encoding(s);
+ return;
+ }
+ TCGV_UNUSED_PTR(fpst);
+ break;
+ case 0xc: /* FMAXNMP */
+ case 0xd: /* FADDP */
+ case 0xf: /* FMAXP */
+ case 0x2c: /* FMINNMP */
+ case 0x2f: /* FMINP */
+ /* FP op, size[0] is 32 or 64 bit */
+ if (!u) {
+ unallocated_encoding(s);
+ return;
+ }
+ size = extract32(size, 0, 1) ? 3 : 2;
+ fpst = get_fpstatus_ptr();
+ break;
+ default:
+ unallocated_encoding(s);
+ return;
+ }
+
+ if (size == 3) {
+ TCGv_i64 tcg_op1 = tcg_temp_new_i64();
+ TCGv_i64 tcg_op2 = tcg_temp_new_i64();
+ TCGv_i64 tcg_res = tcg_temp_new_i64();
+
+ read_vec_element(s, tcg_op1, rn, 0, MO_64);
+ read_vec_element(s, tcg_op2, rn, 1, MO_64);
+
+ switch (opcode) {
+ case 0x3b: /* ADDP */
+ tcg_gen_add_i64(tcg_res, tcg_op1, tcg_op2);
+ break;
+ case 0xc: /* FMAXNMP */
+ gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0xd: /* FADDP */
+ gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0xf: /* FMAXP */
+ gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0x2c: /* FMINNMP */
+ gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0x2f: /* FMINP */
+ gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ write_fp_dreg(s, rd, tcg_res);
+
+ tcg_temp_free_i64(tcg_op1);
+ tcg_temp_free_i64(tcg_op2);
+ tcg_temp_free_i64(tcg_res);
+ } else {
+ TCGv_i32 tcg_op1 = tcg_temp_new_i32();
+ TCGv_i32 tcg_op2 = tcg_temp_new_i32();
+ TCGv_i32 tcg_res = tcg_temp_new_i32();
+
+ read_vec_element_i32(s, tcg_op1, rn, 0, MO_32);
+ read_vec_element_i32(s, tcg_op2, rn, 1, MO_32);
+
+ switch (opcode) {
+ case 0xc: /* FMAXNMP */
+ gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0xd: /* FADDP */
+ gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0xf: /* FMAXP */
+ gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0x2c: /* FMINNMP */
+ gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ case 0x2f: /* FMINP */
+ gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ write_fp_sreg(s, rd, tcg_res);
+
+ tcg_temp_free_i32(tcg_op1);
+ tcg_temp_free_i32(tcg_op2);
+ tcg_temp_free_i32(tcg_res);
+ }
+
+ if (!TCGV_IS_UNUSED_PTR(fpst)) {
+ tcg_temp_free_ptr(fpst);
+ }
}
/*
--
1.8.5
- [Qemu-devel] [PATCH 04/21] target-arm: A64: Add top level decode for SIMD 3-same group, (continued)
- [Qemu-devel] [PATCH 04/21] target-arm: A64: Add top level decode for SIMD 3-same group, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 07/21] target-arm: A64: Add simple SIMD 3-same floating point ops, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 09/21] target-arm: A64: Implement SIMD 3-reg-same shift and saturate insns, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 06/21] target-arm: A64: Add integer ops from SIMD 3-same group, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 08/21] target-arm: A64: Add SIMD shift by immediate, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 12/21] tcg: Add TCGV_UNUSED_PTR, TCGV_IS_UNUSED_PTR, TCGV_EQUAL_PTR, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 15/21] target-arm: A64: Add SIMD simple 64 bit insns from scalar 2-reg misc, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 13/21] target-arm: A64: Implement scalar pairwise ops,
Peter Maydell <=
- Re: [Qemu-devel] [PATCH 00/21] A64: Add Neon instructions, second and third sets, Peter Maydell, 2014/01/26
- [Qemu-devel] [PATCH 16/21] target-arm: A64: Add skeleton decode for SIMD 2-reg misc group, Peter Maydell, 2014/01/26