r600: Support TGSI_OPCODE_I64NEG

This is needed for removing the use of TGSI source modifiers on integers

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8401>

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 8d12c66..703ec72 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -11134,6 +11134,76 @@ static int egcm_u64add(struct r600_shader_ctx *ctx)
        return 0;
 }
 
+
+static int egcm_i64neg(struct r600_shader_ctx *ctx)
+{
+       struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+       struct r600_bytecode_alu alu;
+       int r;
+       int treg = ctx->temp_reg;
+       const int op = ALU_OP2_SUB_INT;
+       const int opc = ALU_OP2_SUBB_UINT;
+
+       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+       alu.op = op;            ;
+       alu.dst.sel = treg;
+       alu.dst.chan = 0;
+       alu.dst.write = 1;
+       alu.src[0].sel = V_SQ_ALU_SRC_0;
+       r600_bytecode_src(&alu.src[1], &ctx->src[0], 0);
+       alu.src[1].neg = 0;
+       r = r600_bytecode_add_alu(ctx->bc, &alu);
+       if (r)
+               return r;
+
+       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+       alu.op = op;
+       alu.dst.sel = treg;
+       alu.dst.chan = 1;
+       alu.dst.write = 1;
+       alu.src[0].sel = V_SQ_ALU_SRC_0;
+       r600_bytecode_src(&alu.src[1], &ctx->src[0], 1);
+       alu.src[1].neg = 0;
+       r = r600_bytecode_add_alu(ctx->bc, &alu);
+       if (r)
+               return r;
+
+       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+       alu.op = opc              ;
+       alu.dst.sel = treg;
+       alu.dst.chan = 2;
+       alu.dst.write = 1;
+       alu.last = 1;
+       alu.src[0].sel = V_SQ_ALU_SRC_0;
+       r600_bytecode_src(&alu.src[1], &ctx->src[0], 0);
+       alu.src[1].neg = 0;
+       r = r600_bytecode_add_alu(ctx->bc, &alu);
+       if (r)
+               return r;
+
+       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+       alu.op = op;
+       tgsi_dst(ctx, &inst->Dst[0], 1, &alu.dst);
+       alu.src[0].sel = treg;
+       alu.src[0].chan = 1;
+       alu.src[1].sel = treg;
+       alu.src[1].chan = 2;
+       alu.last = 1;
+       r = r600_bytecode_add_alu(ctx->bc, &alu);
+       if (r)
+               return r;
+       memset(&alu, 0, sizeof(struct r600_bytecode_alu));
+       alu.op = ALU_OP1_MOV;
+       tgsi_dst(ctx, &inst->Dst[0], 0, &alu.dst);
+       alu.src[0].sel = treg;
+       alu.src[0].chan = 0;
+       alu.last = 1;
+       r = r600_bytecode_add_alu(ctx->bc, &alu);
+       if (r)
+               return r;
+       return 0;
+}
+
 /* result.y = mul_high a, b
    result.x = mul a,b
    result.y += a.x * b.y + a.y * b.x;
@@ -12091,6 +12161,7 @@ static const struct r600_shader_tgsi_instruction eg_shader_tgsi_instruction[] =
        [TGSI_OPCODE_U64ADD]    = { ALU_OP0_NOP, egcm_u64add },
        [TGSI_OPCODE_U64MUL]    = { ALU_OP0_NOP, egcm_u64mul },
        [TGSI_OPCODE_U64DIV]    = { ALU_OP0_NOP, egcm_u64div },
+       [TGSI_OPCODE_I64NEG]    = { ALU_OP0_NOP, egcm_i64neg },
        [TGSI_OPCODE_LAST]      = { ALU_OP0_NOP, tgsi_unsupported},
 };
 
@@ -12317,5 +12388,6 @@ static const struct r600_shader_tgsi_instruction cm_shader_tgsi_instruction[] =
        [TGSI_OPCODE_U64ADD]    = { ALU_OP0_NOP, egcm_u64add },
        [TGSI_OPCODE_U64MUL]    = { ALU_OP0_NOP, egcm_u64mul },
        [TGSI_OPCODE_U64DIV]    = { ALU_OP0_NOP, egcm_u64div },
+       [TGSI_OPCODE_I64NEG]    = { ALU_OP0_NOP, egcm_i64neg },
        [TGSI_OPCODE_LAST]      = { ALU_OP0_NOP, tgsi_unsupported},
 };