diff options
| -rw-r--r-- | src/mesa/shader/slang/slang_codegen.c | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c index 821ed119014..efeae283fca 100644 --- a/src/mesa/shader/slang/slang_codegen.c +++ b/src/mesa/shader/slang/slang_codegen.c @@ -1395,6 +1395,105 @@ make_writemask(const char *field) /** + * Some write-masked assignments are simple, but others are hard. + * Simple example: + * vec3 v; + * v.xy = vec2(a, b); + * Hard example: + * vec3 v; + * v.zy = vec2(a, b); + * this gets transformed/swizzled into: + * v.zy = vec2(a, b).*yx* (* = don't care) + * This function helps to determine simple vs. non-simple. + */ +static GLboolean +_slang_simple_writemask(GLuint writemask, GLuint swizzle) +{ + switch (writemask) { + case WRITEMASK_X: + return GET_SWZ(swizzle, 0) == SWIZZLE_X; + case WRITEMASK_Y: + return GET_SWZ(swizzle, 1) == SWIZZLE_Y; + case WRITEMASK_Z: + return GET_SWZ(swizzle, 2) == SWIZZLE_Z; + case WRITEMASK_W: + return GET_SWZ(swizzle, 3) == SWIZZLE_W; + case WRITEMASK_XY: + return (GET_SWZ(swizzle, 0) == SWIZZLE_X) + && (GET_SWZ(swizzle, 1) == SWIZZLE_Y); + case WRITEMASK_XYZ: + return (GET_SWZ(swizzle, 0) == SWIZZLE_X) + && (GET_SWZ(swizzle, 1) == SWIZZLE_Y) + && (GET_SWZ(swizzle, 2) == SWIZZLE_Z); + case WRITEMASK_XYZW: + return swizzle == SWIZZLE_NOOP; + default: + return GL_FALSE; + } +} + + +/** + * Convert the given swizzle into a writemask. In some cases this + * is trivial, in other cases, we'll need to also swizzle the right + * hand side to put components in the right places. + * \param swizzle the incoming swizzle + * \param writemaskOut returns the writemask + * \param swizzleOut swizzle to apply to the right-hand-side + * \return GL_FALSE for simple writemasks, GL_TRUE for non-simple + */ +static GLboolean +swizzle_to_writemask(GLuint swizzle, + GLuint *writemaskOut, GLuint *swizzleOut) +{ + GLuint mask = 0x0, newSwizzle[4]; + GLint i, size; + + /* make new dst writemask, compute size */ + for (i = 0; i < 4; i++) { + const GLuint swz = GET_SWZ(swizzle, i); + if (swz == SWIZZLE_NIL) { + /* end */ + break; + } + assert(swz >= 0 && swz <= 3); + mask |= (1 << swz); + } + assert(mask <= 0xf); + size = i; /* number of components in mask/swizzle */ + + *writemaskOut = mask; + + /* make new src swizzle, by inversion */ + for (i = 0; i < 4; i++) { + newSwizzle[i] = i; /*identity*/ + } + for (i = 0; i < size; i++) { + const GLuint swz = GET_SWZ(swizzle, i); + newSwizzle[swz] = i; + } + *swizzleOut = MAKE_SWIZZLE4(newSwizzle[0], + newSwizzle[1], + newSwizzle[2], + newSwizzle[3]); + + if (_slang_simple_writemask(mask, *swizzleOut)) { + if (size >= 1) + assert(GET_SWZ(*swizzleOut, 0) == SWIZZLE_X); + if (size >= 2) + assert(GET_SWZ(*swizzleOut, 1) == SWIZZLE_Y); + if (size >= 3) + assert(GET_SWZ(*swizzleOut, 2) == SWIZZLE_Z); + if (size >= 4) + assert(GET_SWZ(*swizzleOut, 3) == SWIZZLE_W); + return GL_TRUE; + } + else + return GL_FALSE; +} + + +/** * Generate IR tree for an asm instruction/operation such as: * __asm vec4_dot __retVal.x, v1, v2; */ @@ -2208,105 +2307,6 @@ _slang_gen_variable(slang_assemble_ctx * A, slang_operation *oper) } -/** - * Some write-masked assignments are simple, but others are hard. - * Simple example: - * vec3 v; - * v.xy = vec2(a, b); - * Hard example: - * vec3 v; - * v.zy = vec2(a, b); - * this gets transformed/swizzled into: - * v.zy = vec2(a, b).*yx* (* = don't care) - * This function helps to determine simple vs. non-simple. - */ -static GLboolean -_slang_simple_writemask(GLuint writemask, GLuint swizzle) -{ - switch (writemask) { - case WRITEMASK_X: - return GET_SWZ(swizzle, 0) == SWIZZLE_X; - case WRITEMASK_Y: - return GET_SWZ(swizzle, 1) == SWIZZLE_Y; - case WRITEMASK_Z: - return GET_SWZ(swizzle, 2) == SWIZZLE_Z; - case WRITEMASK_W: - return GET_SWZ(swizzle, 3) == SWIZZLE_W; - case WRITEMASK_XY: - return (GET_SWZ(swizzle, 0) == SWIZZLE_X) - && (GET_SWZ(swizzle, 1) == SWIZZLE_Y); - case WRITEMASK_XYZ: - return (GET_SWZ(swizzle, 0) == SWIZZLE_X) - && (GET_SWZ(swizzle, 1) == SWIZZLE_Y) - && (GET_SWZ(swizzle, 2) == SWIZZLE_Z); - case WRITEMASK_XYZW: - return swizzle == SWIZZLE_NOOP; - default: - return GL_FALSE; - } -} - - -/** - * Convert the given swizzle into a writemask. In some cases this - * is trivial, in other cases, we'll need to also swizzle the right - * hand side to put components in the right places. - * \param swizzle the incoming swizzle - * \param writemaskOut returns the writemask - * \param swizzleOut swizzle to apply to the right-hand-side - * \return GL_FALSE for simple writemasks, GL_TRUE for non-simple - */ -static GLboolean -swizzle_to_writemask(GLuint swizzle, - GLuint *writemaskOut, GLuint *swizzleOut) -{ - GLuint mask = 0x0, newSwizzle[4]; - GLint i, size; - - /* make new dst writemask, compute size */ - for (i = 0; i < 4; i++) { - const GLuint swz = GET_SWZ(swizzle, i); - if (swz == SWIZZLE_NIL) { - /* end */ - break; - } - assert(swz >= 0 && swz <= 3); - mask |= (1 << swz); - } - assert(mask <= 0xf); - size = i; /* number of components in mask/swizzle */ - - *writemaskOut = mask; - - /* make new src swizzle, by inversion */ - for (i = 0; i < 4; i++) { - newSwizzle[i] = i; /*identity*/ - } - for (i = 0; i < size; i++) { - const GLuint swz = GET_SWZ(swizzle, i); - newSwizzle[swz] = i; - } - *swizzleOut = MAKE_SWIZZLE4(newSwizzle[0], - newSwizzle[1], - newSwizzle[2], - newSwizzle[3]); - - if (_slang_simple_writemask(mask, *swizzleOut)) { - if (size >= 1) - assert(GET_SWZ(*swizzleOut, 0) == SWIZZLE_X); - if (size >= 2) - assert(GET_SWZ(*swizzleOut, 1) == SWIZZLE_Y); - if (size >= 3) - assert(GET_SWZ(*swizzleOut, 2) == SWIZZLE_Z); - if (size >= 4) - assert(GET_SWZ(*swizzleOut, 3) == SWIZZLE_W); - return GL_TRUE; - } - else - return GL_FALSE; -} - - static slang_ir_node * _slang_gen_swizzle(slang_ir_node *child, GLuint swizzle) { |