From f6ead50827c03017e6b730313c361b39190da92f Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 7 Nov 2008 08:51:31 -0700 Subject: [PATCH] mesa: added OPCODE_NRM3/NRM4 instructions for vector normalization. We may emit these instructions from GLSL instead of DP3/RCP/MUL. Also, implement SSG (set sign) instruction in the interpreter. --- src/mesa/shader/prog_execute.c | 41 ++++++++++++++++++++++++++++++ src/mesa/shader/prog_instruction.c | 2 ++ src/mesa/shader/prog_instruction.h | 2 ++ 3 files changed, 45 insertions(+) diff --git a/src/mesa/shader/prog_execute.c b/src/mesa/shader/prog_execute.c index d843761723b..c0173d369e5 100644 --- a/src/mesa/shader/prog_execute.c +++ b/src/mesa/shader/prog_execute.c @@ -1019,6 +1019,36 @@ _mesa_execute_program(GLcontext * ctx, break; case OPCODE_NOP: break; + case OPCODE_NRM3: /* 3-component normalization */ + { + GLfloat a[4], result[4]; + GLfloat tmp; + fetch_vector4(&inst->SrcReg[0], machine, a); + tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2]; + if (tmp != 0.0F) + tmp = 1.0F / tmp; + result[0] = tmp * a[0]; + result[1] = tmp * a[1]; + result[2] = tmp * a[2]; + result[3] = 0.0; /* undefined, but prevent valgrind warnings */ + store_vector4(inst, machine, result); + } + break; + case OPCODE_NRM4: /* 4-component normalization */ + { + GLfloat a[4], result[4]; + GLfloat tmp; + fetch_vector4(&inst->SrcReg[0], machine, a); + tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3]; + if (tmp != 0.0F) + tmp = 1.0F / tmp; + result[0] = tmp * a[0]; + result[1] = tmp * a[1]; + result[2] = tmp * a[2]; + result[3] = tmp * a[3]; + store_vector4(inst, machine, result); + } + break; case OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */ { GLfloat a[4], result[4]; @@ -1277,6 +1307,17 @@ _mesa_execute_program(GLcontext * ctx, } } break; + case OPCODE_SSG: /* set sign (-1, 0 or +1) */ + { + GLfloat a[4], result[4]; + fetch_vector4(&inst->SrcReg[0], machine, a); + result[0] = (GLfloat) ((a[0] > 0.0F) - (a[0] < 0.0F)); + result[1] = (GLfloat) ((a[1] > 0.0F) - (a[1] < 0.0F)); + result[2] = (GLfloat) ((a[2] > 0.0F) - (a[2] < 0.0F)); + result[3] = (GLfloat) ((a[3] > 0.0F) - (a[3] < 0.0F)); + store_vector4(inst, machine, result); + } + break; case OPCODE_STR: /* set true, operands ignored */ { static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F }; diff --git a/src/mesa/shader/prog_instruction.c b/src/mesa/shader/prog_instruction.c index 7e340ce4545..d4f3bcb0e53 100644 --- a/src/mesa/shader/prog_instruction.c +++ b/src/mesa/shader/prog_instruction.c @@ -197,6 +197,8 @@ static const struct instruction_info InstInfo[MAX_OPCODE] = { { OPCODE_NOISE2, "NOISE2", 1, 1 }, { OPCODE_NOISE3, "NOISE3", 1, 1 }, { OPCODE_NOISE4, "NOISE4", 1, 1 }, + { OPCODE_NRM3, "NRM3", 1, 1 }, + { OPCODE_NRM4, "NRM4", 1, 1 }, { OPCODE_PK2H, "PK2H", 1, 1 }, { OPCODE_PK2US, "PK2US", 1, 1 }, { OPCODE_PK4B, "PK4B", 1, 1 }, diff --git a/src/mesa/shader/prog_instruction.h b/src/mesa/shader/prog_instruction.h index 16701e4ec95..3bcd0829a23 100644 --- a/src/mesa/shader/prog_instruction.h +++ b/src/mesa/shader/prog_instruction.h @@ -188,6 +188,8 @@ typedef enum prog_opcode { OPCODE_NOISE2, /* X */ OPCODE_NOISE3, /* X */ OPCODE_NOISE4, /* X */ + OPCODE_NRM3, /* */ + OPCODE_NRM4, /* */ OPCODE_PK2H, /* X */ OPCODE_PK2US, /* X */ OPCODE_PK4B, /* X */ -- 2.30.2