diff options
author | Brian Paul <brian.paul@tungstengraphics.com> | 2006-10-30 00:22:28 +0000 |
---|---|---|
committer | Brian Paul <brian.paul@tungstengraphics.com> | 2006-10-30 00:22:28 +0000 |
commit | 075fae52001cfd2f99c2c9310208a9a615316454 (patch) | |
tree | fdabccb4d357c00e5cdffc0b2496712463249646 /src/mesa/shader | |
parent | 0f8405365f199b8d41974ac9cbe945f4dbf2c2bb (diff) |
code tweaks, remove old comments
Diffstat (limited to 'src/mesa/shader')
-rw-r--r-- | src/mesa/shader/nvvertexec.c | 81 |
1 files changed, 16 insertions, 65 deletions
diff --git a/src/mesa/shader/nvvertexec.c b/src/mesa/shader/nvvertexec.c index f00f1e86571..10962d7e14a 100644 --- a/src/mesa/shader/nvvertexec.c +++ b/src/mesa/shader/nvvertexec.c @@ -289,18 +289,16 @@ fetch_vector4( GLcontext *ctx, GLfloat result[4] ) { const GLfloat *src = get_register_pointer(ctx, source, machine, program); - + ASSERT(src); + result[0] = src[GET_SWZ(source->Swizzle, 0)]; + result[1] = src[GET_SWZ(source->Swizzle, 1)]; + result[2] = src[GET_SWZ(source->Swizzle, 2)]; + result[3] = src[GET_SWZ(source->Swizzle, 3)]; if (source->NegateBase) { - result[0] = -src[GET_SWZ(source->Swizzle, 0)]; - result[1] = -src[GET_SWZ(source->Swizzle, 1)]; - result[2] = -src[GET_SWZ(source->Swizzle, 2)]; - result[3] = -src[GET_SWZ(source->Swizzle, 3)]; - } - else { - result[0] = src[GET_SWZ(source->Swizzle, 0)]; - result[1] = src[GET_SWZ(source->Swizzle, 1)]; - result[2] = src[GET_SWZ(source->Swizzle, 2)]; - result[3] = src[GET_SWZ(source->Swizzle, 3)]; + result[0] = -result[0]; + result[1] = -result[1]; + result[2] = -result[2]; + result[3] = -result[3]; } } @@ -317,11 +315,10 @@ fetch_vector1( GLcontext *ctx, GLfloat result[4] ) { const GLfloat *src = get_register_pointer(ctx, source, machine, program); + ASSERT(src); + result[0] = src[GET_SWZ(source->Swizzle, 0)]; if (source->NegateBase) { - result[0] = -src[GET_SWZ(source->Swizzle, 0)]; - } - else { - result[0] = src[GET_SWZ(source->Swizzle, 0)]; + result[0] = -result[0]; } } @@ -337,13 +334,14 @@ store_vector4( const struct prog_instruction *inst, const struct prog_dst_register *dest = &(inst->DstReg); GLfloat *dst; switch (dest->File) { - case PROGRAM_TEMPORARY: - dst = machine->Temporaries[dest->Index]; - break; case PROGRAM_OUTPUT: dst = machine->Outputs[dest->Index]; break; + case PROGRAM_TEMPORARY: + dst = machine->Temporaries[dest->Index]; + break; case PROGRAM_ENV_PARAM: + /* Only for VP state programs */ { /* a slight hack */ GET_CURRENT_CONTEXT(ctx); @@ -835,50 +833,3 @@ _mesa_exec_vertex_state_program(GLcontext *ctx, COPY_4V(machine.Inputs[VERT_ATTRIB_POS], params); _mesa_exec_vertex_program(ctx, &machine, vprog); } - - - -/** -Thoughts on vertex program optimization: - -The obvious thing to do is to compile the vertex program into X86/SSE/3DNow! -assembly code. That will probably be a lot of work. - -Another approach might be to replace the vp_instruction->Opcode field with -a pointer to a specialized C function which executes the instruction. -In particular we can write functions which skip swizzling, negating, -masking, relative addressing, etc. when they're not needed. - -For example: - -void simple_add( struct prog_instruction *inst ) -{ - GLfloat *sum = machine->Registers[inst->DstReg.Register]; - GLfloat *a = machine->Registers[inst->SrcReg[0].Register]; - GLfloat *b = machine->Registers[inst->SrcReg[1].Register]; - sum[0] = a[0] + b[0]; - sum[1] = a[1] + b[1]; - sum[2] = a[2] + b[2]; - sum[3] = a[3] + b[3]; -} - -*/ - -/* - -KW: - -A first step would be to 'vectorize' the programs in the same way as -the normal transformation code in the tnl module. Thus each opcode -takes zero or more input vectors (registers) and produces one or more -output vectors. - -These operations would intially be coded in C, with machine-specific -assembly following, as is currently the case for matrix -transformations in the math/ directory. The preprocessing scheme for -selecting simpler operations Brian describes above would also work -here. - -This should give reasonable performance without excessive effort. - -*/ |