r600: factor out cayman_emit_unary_double_raw

We will use it for DDIV.

Tested-by: Glenn Kennard <glenn.kennard@gmail.com>
Tested-by: James Harvey <lothmordor@gmail.com>
Cc: 17.0 <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 488560cfe6ee2206f7a7f894694ebc43b419be61)

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 7d1452a..5c4bc91 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -4185,42 +4185,64 @@ static int egcm_double_to_int(struct r600_shader_ctx *ctx)
        return 0;
 }
 
-static int cayman_emit_double_instr(struct r600_shader_ctx *ctx)
+static int cayman_emit_unary_double_raw(struct r600_bytecode *bc,
+                                       unsigned op,
+                                       int dst_reg,
+                                       struct r600_shader_src *src,
+                                       bool abs)
 {
-       struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
-       int i, r;
        struct r600_bytecode_alu alu;
-       int last_slot = 3;
-       int lasti = tgsi_last_instruction(inst->Dst[0].Register.WriteMask);
-       int t1 = ctx->temp_reg;
+       const int last_slot = 3;
+       int r;
 
        /* these have to write the result to X/Y by the looks of it */
-       for (i = 0 ; i < last_slot; i++) {
+       for (int i = 0 ; i < last_slot; i++) {
                memset(&alu, 0, sizeof(struct r600_bytecode_alu));
-               alu.op = ctx->inst_info->op;
-
-               /* should only be one src regs */
-               assert (inst->Instruction.NumSrcRegs == 1);
+               alu.op = op;
 
-               r600_bytecode_src(&alu.src[0], &ctx->src[0], 1);
-               r600_bytecode_src(&alu.src[1], &ctx->src[0], 0);
+               r600_bytecode_src(&alu.src[0], src, 1);
+               r600_bytecode_src(&alu.src[1], src, 0);
 
-               /* RSQ should take the absolute value of src */
-               if (ctx->parse.FullToken.FullInstruction.Instruction.Opcode == TGSI_OPCODE_DRSQ ||
-                   ctx->parse.FullToken.FullInstruction.Instruction.Opcode == TGSI_OPCODE_DSQRT) {
+               if (abs)
                        r600_bytecode_src_set_abs(&alu.src[1]);
-               }
-               alu.dst.sel = t1;
+
+               alu.dst.sel = dst_reg;
                alu.dst.chan = i;
                alu.dst.write = (i == 0 || i == 1);
 
-               if (ctx->bc->chip_class != CAYMAN || i == last_slot - 1)
+               if (bc->chip_class != CAYMAN || i == last_slot - 1)
                        alu.last = 1;
-               r = r600_bytecode_add_alu(ctx->bc, &alu);
+               r = r600_bytecode_add_alu(bc, &alu);
                if (r)
                        return r;
        }
 
+       return 0;
+}
+
+static int cayman_emit_double_instr(struct r600_shader_ctx *ctx)
+{
+       struct tgsi_full_instruction *inst = &ctx->parse.FullToken.FullInstruction;
+       int i, r;
+       struct r600_bytecode_alu alu;
+       int lasti = tgsi_last_instruction(inst->Dst[0].Register.WriteMask);
+       int t1 = ctx->temp_reg;
+
+       /* should only be one src regs */
+       assert(inst->Instruction.NumSrcRegs == 1);
+
+       /* only support one double at a time */
+       assert(inst->Dst[0].Register.WriteMask == TGSI_WRITEMASK_XY ||
+              inst->Dst[0].Register.WriteMask == TGSI_WRITEMASK_ZW);
+
+       r = cayman_emit_unary_double_raw(
+               ctx->bc, ctx->inst_info->op, t1,
+               &ctx->src[0],
+               ctx->parse.FullToken.FullInstruction.Instruction.Opcode == TGSI_OPCODE_DRSQ ||
+               ctx->parse.FullToken.FullInstruction.Instruction.Opcode == TGSI_OPCODE_DSQRT);
+       if (r)
+               return r;
+
        for (i = 0 ; i <= lasti; i++) {
                if (!(inst->Dst[0].Register.WriteMask & (1 << i)))
                        continue;