diff options
author | Marek Olšák <maraeo@gmail.com> | 2010-08-25 20:23:29 +0200 |
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committer | Marek Olšák <maraeo@gmail.com> | 2010-08-25 21:22:56 +0200 |
commit | bcca7fd5d56890a05527e09f5abef0449398f95e (patch) | |
tree | 6c87f02119a54aa60651ccff943cb66397eea8c8 /src/mesa/drivers/dri/r300/compiler | |
parent | 721954c334787bbddd8726348a4c95465f89677b (diff) |
r300/compiler: emulate relative addressing with negative offsets in VS
3 more piglits, cool.
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler')
-rw-r--r-- | src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c index 5086d76d4d..b05b3aabf3 100644 --- a/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c +++ b/src/mesa/drivers/dri/r300/compiler/r3xx_vertprog.c @@ -892,6 +892,76 @@ static int swizzle_is_native(rc_opcode opcode, struct rc_src_register reg) return 1; } +static void transform_negative_addressing(struct r300_vertex_program_compiler *c, + struct rc_instruction *arl, + struct rc_instruction *end, + int min_offset) +{ + struct rc_instruction *inst, *add; + unsigned const_swizzle; + + /* Transform ARL */ + add = rc_insert_new_instruction(&c->Base, arl->Prev); + add->U.I.Opcode = RC_OPCODE_ADD; + add->U.I.DstReg.File = RC_FILE_TEMPORARY; + add->U.I.DstReg.Index = rc_find_free_temporary(&c->Base); + add->U.I.DstReg.WriteMask = RC_MASK_X; + add->U.I.SrcReg[0] = arl->U.I.SrcReg[0]; + add->U.I.SrcReg[1].File = RC_FILE_CONSTANT; + add->U.I.SrcReg[1].Index = rc_constants_add_immediate_scalar(&c->Base.Program.Constants, + min_offset, &const_swizzle); + add->U.I.SrcReg[1].Swizzle = const_swizzle; + + arl->U.I.SrcReg[0].File = RC_FILE_TEMPORARY; + arl->U.I.SrcReg[0].Index = add->U.I.DstReg.Index; + arl->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_XXXX; + + /* Rewrite offsets up to and excluding inst. */ + for (inst = arl->Next; inst != end; inst = inst->Next) { + const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode); + + for (unsigned i = 0; i < opcode->NumSrcRegs; i++) + if (inst->U.I.SrcReg[i].RelAddr) + inst->U.I.SrcReg[i].Index -= min_offset; + } +} + +static void rc_emulate_negative_addressing(struct r300_vertex_program_compiler *c) +{ + struct rc_instruction *inst, *lastARL = NULL; + int min_offset = 0; + + for (inst = c->Base.Program.Instructions.Next; inst != &c->Base.Program.Instructions; inst = inst->Next) { + const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode); + + if (inst->U.I.Opcode == RC_OPCODE_ARL) { + if (lastARL != NULL && min_offset < 0) + transform_negative_addressing(c, lastARL, inst, min_offset); + + lastARL = inst; + min_offset = 0; + continue; + } + + for (unsigned i = 0; i < opcode->NumSrcRegs; i++) { + if (inst->U.I.SrcReg[i].RelAddr && + inst->U.I.SrcReg[i].Index < 0) { + /* ARL must precede any indirect addressing. */ + if (lastARL == NULL) { + rc_error(&c->Base, "Vertex shader: Found relative addressing without ARL."); + return; + } + + if (inst->U.I.SrcReg[i].Index < min_offset) + min_offset = inst->U.I.SrcReg[i].Index; + } + } + } + + if (lastARL != NULL && min_offset < 0) + transform_negative_addressing(c, lastARL, inst, min_offset); +} + static void debug_program_log(struct r300_vertex_program_compiler* c, const char * where) { if (c->Base.Debug) { @@ -933,6 +1003,10 @@ void r3xx_compile_vertex_program(struct r300_vertex_program_compiler *c) debug_program_log(c, "after emulate branches"); } + rc_emulate_negative_addressing(c); + + debug_program_log(c, "after negative addressing emulation"); + if (c->Base.is_r500) { struct radeon_program_transformation transformations[] = { { &r300_transform_vertex_alu, 0 }, |