diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_nvfragprog.c | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/src/mesa/swrast/s_nvfragprog.c b/src/mesa/swrast/s_nvfragprog.c index 1da14e80d18..62f95706d9a 100644 --- a/src/mesa/swrast/s_nvfragprog.c +++ b/src/mesa/swrast/s_nvfragprog.c @@ -879,25 +879,28 @@ execute_program( GLcontext *ctx, #endif } break; - case FP_OPCODE_PK2H: /* pack two 16-bit floats */ - /* XXX this is probably wrong */ + case FP_OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */ { GLfloat a[4], result[4]; - const GLuint *rawBits = (const GLuint *) a; + GLhalfNV hx, hy; GLuint *rawResult = (GLuint *) result; + GLuint twoHalves; fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a ); + hx = _mesa_float_to_half(a[0]); + hy = _mesa_float_to_half(a[1]); + twoHalves = hx | (hy << 16); rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] - = rawBits[0] | (rawBits[1] << 16); + = twoHalves; store_vector4( inst, machine, result ); } break; - case FP_OPCODE_PK2US: /* pack two GLushorts */ + case FP_OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */ { GLfloat a[4], result[4]; GLuint usx, usy, *rawResult = (GLuint *) result; fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a ); a[0] = CLAMP(a[0], 0.0F, 1.0F); - a[1] = CLAMP(a[0], 0.0F, 1.0F); + a[1] = CLAMP(a[1], 0.0F, 1.0F); usx = IROUND(a[0] * 65535.0F); usy = IROUND(a[1] * 65535.0F); rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] @@ -905,7 +908,7 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, result ); } break; - case FP_OPCODE_PK4B: /* pack four GLbytes */ + case FP_OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */ { GLfloat a[4], result[4]; GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result; @@ -923,7 +926,7 @@ execute_program( GLcontext *ctx, store_vector4( inst, machine, result ); } break; - case FP_OPCODE_PK4UB: /* pack four GLubytes */ + case FP_OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */ { GLfloat a[4], result[4]; GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result; @@ -1186,16 +1189,15 @@ execute_program( GLcontext *ctx, } break; case FP_OPCODE_UP2H: /* unpack two 16-bit floats */ - /* XXX this is probably wrong */ { GLfloat a[4], result[4]; const GLuint *rawBits = (const GLuint *) a; - GLuint *rawResult = (GLuint *) result; + GLhalfNV hx, hy; fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); - rawResult[0] = rawBits[0] & 0xffff; - rawResult[1] = (rawBits[0] >> 16) & 0xffff; - rawResult[2] = rawBits[0] & 0xffff; - rawResult[3] = (rawBits[0] >> 16) & 0xffff; + hx = rawBits[0] & 0xffff; + hy = rawBits[0] >> 16; + result[0] = result[2] = _mesa_half_to_float(hx); + result[1] = result[3] = _mesa_half_to_float(hy); store_vector4( inst, machine, result ); } break; @@ -1203,11 +1205,12 @@ execute_program( GLcontext *ctx, { GLfloat a[4], result[4]; const GLuint *rawBits = (const GLuint *) a; + GLushort usx, usy; fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); - result[0] = (GLfloat) ((rawBits[0] >> 0) & 0xffff) / 65535.0F; - result[1] = (GLfloat) ((rawBits[0] >> 16) & 0xffff) / 65535.0F; - result[2] = result[0]; - result[3] = result[1]; + usx = rawBits[0] & 0xffff; + usy = rawBits[0] >> 16; + result[0] = result[2] = usx * (1.0f / 65535.0f); + result[1] = result[3] = usy * (1.0f / 65535.0f); store_vector4( inst, machine, result ); } break; |