diff options
| author | Marek Olšák <maraeo@gmail.com> | 2010-08-15 22:53:17 +0200 |
|---|---|---|
| committer | Marek Olšák <maraeo@gmail.com> | 2010-08-16 00:08:00 +0200 |
| commit | b217167056970a9b7d09b7ffe863f013c2083395 (patch) | |
| tree | fe3e03273bb6756450566c264a961151846f22c9 /src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c | |
| parent | b97ab20f29c4afa708e9176331d6a20551a308ac (diff) | |
r300/compiler: implement SSG opcode
Diffstat (limited to 'src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c')
| -rw-r--r-- | src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c b/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c index 857aae5514..c988e0c67e 100644 --- a/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c +++ b/src/mesa/drivers/dri/r300/compiler/radeon_program_alu.c @@ -464,6 +464,43 @@ static void transform_SNE(struct radeon_compiler* c, rc_remove_instruction(inst); } +static void transform_SSG(struct radeon_compiler* c, + struct rc_instruction* inst) +{ + /* result = sign(x) + * + * CMP tmp0, -x, 1, 0 + * CMP tmp1, x, 1, 0 + * ADD result, tmp0, -tmp1; + */ + unsigned tmp0, tmp1; + + /* 0 < x */ + tmp0 = rc_find_free_temporary(c); + emit3(c, inst->Prev, RC_OPCODE_CMP, 0, + dstregtmpmask(tmp0, inst->U.I.DstReg.WriteMask), + negate(inst->U.I.SrcReg[0]), + builtin_one, + builtin_zero); + + /* x < 0 */ + tmp1 = rc_find_free_temporary(c); + emit3(c, inst->Prev, RC_OPCODE_CMP, 0, + dstregtmpmask(tmp1, inst->U.I.DstReg.WriteMask), + inst->U.I.SrcReg[0], + builtin_one, + builtin_zero); + + /* Either both are zero, or one of them is one and the other is zero. */ + /* result = tmp0 - tmp1 */ + emit2(c, inst->Prev, RC_OPCODE_ADD, 0, + inst->U.I.DstReg, + srcreg(RC_FILE_TEMPORARY, tmp0), + negate(srcreg(RC_FILE_TEMPORARY, tmp1))); + + rc_remove_instruction(inst); +} + static void transform_SUB(struct radeon_compiler* c, struct rc_instruction* inst) { @@ -530,6 +567,7 @@ int radeonTransformALU( case RC_OPCODE_SLE: transform_SLE(c, inst); return 1; case RC_OPCODE_SLT: transform_SLT(c, inst); return 1; case RC_OPCODE_SNE: transform_SNE(c, inst); return 1; + case RC_OPCODE_SSG: transform_SSG(c, inst); return 1; case RC_OPCODE_SUB: transform_SUB(c, inst); return 1; case RC_OPCODE_SWZ: transform_SWZ(c, inst); return 1; case RC_OPCODE_XPD: transform_XPD(c, inst); return 1; @@ -672,6 +710,41 @@ static void transform_r300_vertex_SLE(struct radeon_compiler* c, inst->U.I.SrcReg[1].Negate ^= RC_MASK_XYZW; } +static void transform_r300_vertex_SSG(struct radeon_compiler* c, + struct rc_instruction* inst) +{ + /* result = sign(x) + * + * SLT tmp0, 0, x; + * SLT tmp1, x, 0; + * ADD result, tmp0, -tmp1; + */ + unsigned tmp0, tmp1; + + /* 0 < x */ + tmp0 = rc_find_free_temporary(c); + emit2(c, inst->Prev, RC_OPCODE_SLT, 0, + dstregtmpmask(tmp0, inst->U.I.DstReg.WriteMask), + builtin_zero, + inst->U.I.SrcReg[0]); + + /* x < 0 */ + tmp1 = rc_find_free_temporary(c); + emit2(c, inst->Prev, RC_OPCODE_SLT, 0, + dstregtmpmask(tmp1, inst->U.I.DstReg.WriteMask), + inst->U.I.SrcReg[0], + builtin_zero); + + /* Either both are zero, or one of them is one and the other is zero. */ + /* result = tmp0 - tmp1 */ + emit2(c, inst->Prev, RC_OPCODE_ADD, 0, + inst->U.I.DstReg, + srcreg(RC_FILE_TEMPORARY, tmp0), + negate(srcreg(RC_FILE_TEMPORARY, tmp1))); + + rc_remove_instruction(inst); +} + /** * For use with radeonLocalTransform, this transforms non-native ALU * instructions of the r300 up to r500 vertex engine. @@ -705,6 +778,7 @@ int r300_transform_vertex_alu( return 1; } return 0; + case RC_OPCODE_SSG: transform_r300_vertex_SSG(c, inst); return 1; case RC_OPCODE_SUB: transform_SUB(c, inst); return 1; case RC_OPCODE_SWZ: transform_SWZ(c, inst); return 1; case RC_OPCODE_XPD: transform_XPD(c, inst); return 1; |