radeonsi: add missing colorbuffer formats (rework format translation)

This fixes some piglits, e.g:
  spec/!OpenGL 3.0/required-renderbuffer-attachment-formats.

This can be ported to r600g.

Reviewed-by: Michel Dänzer <[email protected]>

1 files changed, 104 insertions, 346 deletions

diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index b5d625aa7a3..3be17a595e0 100644
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -823,366 +823,124 @@ static void *si_create_db_flush_dsa(struct r600_context *rctx, bool copy_depth,
  */
 static uint32_t si_translate_colorformat(enum pipe_format format)
 {
-	switch (format) {
-	/* 8-bit buffers. */
-	case PIPE_FORMAT_A8_UNORM:
-	case PIPE_FORMAT_A8_SNORM:
-	case PIPE_FORMAT_A8_UINT:
-	case PIPE_FORMAT_A8_SINT:
-	case PIPE_FORMAT_I8_UNORM:
-	case PIPE_FORMAT_I8_SNORM:
-	case PIPE_FORMAT_I8_UINT:
-	case PIPE_FORMAT_I8_SINT:
-	case PIPE_FORMAT_L8_UNORM:
-	case PIPE_FORMAT_L8_SNORM:
-	case PIPE_FORMAT_L8_UINT:
-	case PIPE_FORMAT_L8_SINT:
-	case PIPE_FORMAT_L8_SRGB:
-	case PIPE_FORMAT_R8_UNORM:
-	case PIPE_FORMAT_R8_SNORM:
-	case PIPE_FORMAT_R8_UINT:
-	case PIPE_FORMAT_R8_SINT:
-		return V_028C70_COLOR_8;
-
-	/* 16-bit buffers. */
-	case PIPE_FORMAT_B5G6R5_UNORM:
-		return V_028C70_COLOR_5_6_5;
-
-	case PIPE_FORMAT_B5G5R5A1_UNORM:
-	case PIPE_FORMAT_B5G5R5X1_UNORM:
-		return V_028C70_COLOR_1_5_5_5;
-
-	case PIPE_FORMAT_B4G4R4A4_UNORM:
-	case PIPE_FORMAT_B4G4R4X4_UNORM:
-		return V_028C70_COLOR_4_4_4_4;
-
-	case PIPE_FORMAT_L8A8_UNORM:
-	case PIPE_FORMAT_L8A8_SNORM:
-	case PIPE_FORMAT_L8A8_UINT:
-	case PIPE_FORMAT_L8A8_SINT:
-	case PIPE_FORMAT_R8G8_SNORM:
-	case PIPE_FORMAT_R8G8_UNORM:
-	case PIPE_FORMAT_R8G8_UINT:
-	case PIPE_FORMAT_R8G8_SINT:
-		return V_028C70_COLOR_8_8;
-
-	case PIPE_FORMAT_Z16_UNORM:
-	case PIPE_FORMAT_R16_UNORM:
-	case PIPE_FORMAT_R16_SNORM:
-	case PIPE_FORMAT_R16_UINT:
-	case PIPE_FORMAT_R16_SINT:
-	case PIPE_FORMAT_R16_FLOAT:
-	case PIPE_FORMAT_L16_UNORM:
-	case PIPE_FORMAT_L16_SNORM:
-	case PIPE_FORMAT_L16_FLOAT:
-	case PIPE_FORMAT_I16_UNORM:
-	case PIPE_FORMAT_I16_SNORM:
-	case PIPE_FORMAT_I16_FLOAT:
-	case PIPE_FORMAT_A16_UNORM:
-	case PIPE_FORMAT_A16_SNORM:
-	case PIPE_FORMAT_A16_FLOAT:
-		return V_028C70_COLOR_16;
-
-	/* 32-bit buffers. */
-	case PIPE_FORMAT_A8B8G8R8_SRGB:
-	case PIPE_FORMAT_A8B8G8R8_UNORM:
-	case PIPE_FORMAT_A8R8G8B8_UNORM:
-	case PIPE_FORMAT_B8G8R8A8_SRGB:
-	case PIPE_FORMAT_B8G8R8A8_UNORM:
-	case PIPE_FORMAT_B8G8R8X8_UNORM:
-	case PIPE_FORMAT_R8G8B8A8_SNORM:
-	case PIPE_FORMAT_R8G8B8A8_UNORM:
-	case PIPE_FORMAT_R8G8B8X8_UNORM:
-	case PIPE_FORMAT_R8G8B8X8_SNORM:
-	case PIPE_FORMAT_R8G8B8X8_SRGB:
-	case PIPE_FORMAT_R8G8B8X8_UINT:
-	case PIPE_FORMAT_R8G8B8X8_SINT:
-	case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
-	case PIPE_FORMAT_X8B8G8R8_UNORM:
-	case PIPE_FORMAT_X8R8G8B8_UNORM:
-	case PIPE_FORMAT_R8G8B8A8_SSCALED:
-	case PIPE_FORMAT_R8G8B8A8_USCALED:
-	case PIPE_FORMAT_R8G8B8A8_SINT:
-	case PIPE_FORMAT_R8G8B8A8_UINT:
-		return V_028C70_COLOR_8_8_8_8;
-
-	case PIPE_FORMAT_R10G10B10A2_UNORM:
-	case PIPE_FORMAT_R10G10B10X2_SNORM:
-	case PIPE_FORMAT_B10G10R10A2_UNORM:
-	case PIPE_FORMAT_B10G10R10A2_UINT:
-	case PIPE_FORMAT_B10G10R10X2_UNORM:
-	case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
-		return V_028C70_COLOR_2_10_10_10;
-
-	case PIPE_FORMAT_Z24X8_UNORM:
-	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
-		return V_028C70_COLOR_8_24;
-
-	case PIPE_FORMAT_S8X24_UINT:
-	case PIPE_FORMAT_X8Z24_UNORM:
-	case PIPE_FORMAT_S8_UINT_Z24_UNORM:
-		return V_028C70_COLOR_24_8;
+	const struct util_format_description *desc = util_format_description(format);
 
-	case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
-		return V_028C70_COLOR_X24_8_32_FLOAT;
+#define HAS_SIZE(x,y,z,w) \
+	(desc->channel[0].size == (x) && desc->channel[1].size == (y) && \
+         desc->channel[2].size == (z) && desc->channel[3].size == (w))
 
-	case PIPE_FORMAT_I32_FLOAT:
-	case PIPE_FORMAT_L32_FLOAT:
-	case PIPE_FORMAT_R32_FLOAT:
-	case PIPE_FORMAT_A32_FLOAT:
-	case PIPE_FORMAT_Z32_FLOAT:
-		return V_028C70_COLOR_32;
-
-	case PIPE_FORMAT_L16A16_UNORM:
-	case PIPE_FORMAT_L16A16_SNORM:
-	case PIPE_FORMAT_L16A16_FLOAT:
-	case PIPE_FORMAT_R16G16_SSCALED:
-	case PIPE_FORMAT_R16G16_UNORM:
-	case PIPE_FORMAT_R16G16_SNORM:
-	case PIPE_FORMAT_R16G16_UINT:
-	case PIPE_FORMAT_R16G16_SINT:
-	case PIPE_FORMAT_R16G16_FLOAT:
-		return V_028C70_COLOR_16_16;
-
-	case PIPE_FORMAT_R11G11B10_FLOAT:
+	if (format == PIPE_FORMAT_R11G11B10_FLOAT) /* isn't plain */
 		return V_028C70_COLOR_10_11_11;
 
-	/* 64-bit buffers. */
-	case PIPE_FORMAT_R16G16B16A16_UINT:
-	case PIPE_FORMAT_R16G16B16A16_SINT:
-	case PIPE_FORMAT_R16G16B16A16_USCALED:
-	case PIPE_FORMAT_R16G16B16A16_SSCALED:
-	case PIPE_FORMAT_R16G16B16A16_UNORM:
-	case PIPE_FORMAT_R16G16B16A16_SNORM:
-	case PIPE_FORMAT_R16G16B16A16_FLOAT:
-	case PIPE_FORMAT_R16G16B16X16_UNORM:
-	case PIPE_FORMAT_R16G16B16X16_SNORM:
-	case PIPE_FORMAT_R16G16B16X16_FLOAT:
-	case PIPE_FORMAT_R16G16B16X16_UINT:
-	case PIPE_FORMAT_R16G16B16X16_SINT:
-		return V_028C70_COLOR_16_16_16_16;
-
-	case PIPE_FORMAT_L32A32_FLOAT:
-	case PIPE_FORMAT_L32A32_UINT:
-	case PIPE_FORMAT_L32A32_SINT:
-	case PIPE_FORMAT_R32G32_FLOAT:
-	case PIPE_FORMAT_R32G32_USCALED:
-	case PIPE_FORMAT_R32G32_SSCALED:
-	case PIPE_FORMAT_R32G32_SINT:
-	case PIPE_FORMAT_R32G32_UINT:
-		return V_028C70_COLOR_32_32;
-
-	/* 128-bit buffers. */
-	case PIPE_FORMAT_R32G32B32A32_SNORM:
-	case PIPE_FORMAT_R32G32B32A32_UNORM:
-	case PIPE_FORMAT_R32G32B32A32_SSCALED:
-	case PIPE_FORMAT_R32G32B32A32_USCALED:
-	case PIPE_FORMAT_R32G32B32A32_SINT:
-	case PIPE_FORMAT_R32G32B32A32_UINT:
-	case PIPE_FORMAT_R32G32B32A32_FLOAT:
-	case PIPE_FORMAT_R32G32B32X32_FLOAT:
-	case PIPE_FORMAT_R32G32B32X32_UINT:
-	case PIPE_FORMAT_R32G32B32X32_SINT:
-		return V_028C70_COLOR_32_32_32_32;
-
-	/* YUV buffers. */
-	case PIPE_FORMAT_UYVY:
-	case PIPE_FORMAT_YUYV:
-	/* 96-bit buffers. */
-	case PIPE_FORMAT_R32G32B32_FLOAT:
-	/* 8-bit buffers. */
-	case PIPE_FORMAT_L4A4_UNORM:
-	case PIPE_FORMAT_R4A4_UNORM:
-	case PIPE_FORMAT_A4R4_UNORM:
-	default:
-		return V_028C70_COLOR_INVALID; /* Unsupported. */
+	if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
+		return V_028C70_COLOR_INVALID;
+
+	switch (desc->nr_channels) {
+	case 1:
+		switch (desc->channel[0].size) {
+		case 8:
+			return V_028C70_COLOR_8;
+		case 16:
+			return V_028C70_COLOR_16;
+		case 32:
+			return V_028C70_COLOR_32;
+		}
+		break;
+	case 2:
+		if (desc->channel[0].size == desc->channel[1].size) {
+			switch (desc->channel[0].size) {
+			case 8:
+				return V_028C70_COLOR_8_8;
+			case 16:
+				return V_028C70_COLOR_16_16;
+			case 32:
+				return V_028C70_COLOR_32_32;
+			}
+		} else if (HAS_SIZE(8,24,0,0)) {
+			return V_028C70_COLOR_24_8;
+		} else if (HAS_SIZE(24,8,0,0)) {
+			return V_028C70_COLOR_8_24;
+		}
+		break;
+	case 3:
+		if (HAS_SIZE(5,6,5,0)) {
+			return V_028C70_COLOR_5_6_5;
+		} else if (HAS_SIZE(32,8,24,0)) {
+			return V_028C70_COLOR_X24_8_32_FLOAT;
+		}
+		break;
+	case 4:
+		if (desc->channel[0].size == desc->channel[1].size &&
+		    desc->channel[0].size == desc->channel[2].size &&
+		    desc->channel[0].size == desc->channel[3].size) {
+			switch (desc->channel[0].size) {
+			case 4:
+				return V_028C70_COLOR_4_4_4_4;
+			case 8:
+				return V_028C70_COLOR_8_8_8_8;
+			case 16:
+				return V_028C70_COLOR_16_16_16_16;
+			case 32:
+				return V_028C70_COLOR_32_32_32_32;
+			}
+		} else if (HAS_SIZE(5,5,5,1)) {
+			return V_028C70_COLOR_1_5_5_5;
+		} else if (HAS_SIZE(10,10,10,2)) {
+			return V_028C70_COLOR_2_10_10_10;
+		}
+		break;
 	}
+	return V_028C70_COLOR_INVALID;
 }
 
 static uint32_t si_translate_colorswap(enum pipe_format format)
 {
-	switch (format) {
-	/* 8-bit buffers. */
-	case PIPE_FORMAT_L4A4_UNORM:
-	case PIPE_FORMAT_A4R4_UNORM:
-		return V_028C70_SWAP_ALT;
-
-	case PIPE_FORMAT_A8_UNORM:
-	case PIPE_FORMAT_A8_SNORM:
-	case PIPE_FORMAT_A8_UINT:
-	case PIPE_FORMAT_A8_SINT:
-	case PIPE_FORMAT_R4A4_UNORM:
-		return V_028C70_SWAP_ALT_REV;
-	case PIPE_FORMAT_I8_UNORM:
-	case PIPE_FORMAT_I8_SNORM:
-	case PIPE_FORMAT_L8_UNORM:
-	case PIPE_FORMAT_L8_SNORM:
-	case PIPE_FORMAT_I8_UINT:
-	case PIPE_FORMAT_I8_SINT:
-	case PIPE_FORMAT_L8_UINT:
-	case PIPE_FORMAT_L8_SINT:
-	case PIPE_FORMAT_L8_SRGB:
-	case PIPE_FORMAT_R8_UNORM:
-	case PIPE_FORMAT_R8_SNORM:
-	case PIPE_FORMAT_R8_UINT:
-	case PIPE_FORMAT_R8_SINT:
-		return V_028C70_SWAP_STD;
-
-	/* 16-bit buffers. */
-	case PIPE_FORMAT_B5G6R5_UNORM:
-		return V_028C70_SWAP_STD_REV;
-
-	case PIPE_FORMAT_B5G5R5A1_UNORM:
-	case PIPE_FORMAT_B5G5R5X1_UNORM:
-		return V_028C70_SWAP_ALT;
+	const struct util_format_description *desc = util_format_description(format);
 
-	case PIPE_FORMAT_B4G4R4A4_UNORM:
-	case PIPE_FORMAT_B4G4R4X4_UNORM:
-		return V_028C70_SWAP_ALT;
+#define HAS_SWIZZLE(chan,swz) (desc->swizzle[chan] == UTIL_FORMAT_SWIZZLE_##swz)
 
-	case PIPE_FORMAT_Z16_UNORM:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_L8A8_UNORM:
-	case PIPE_FORMAT_L8A8_SNORM:
-	case PIPE_FORMAT_L8A8_UINT:
-	case PIPE_FORMAT_L8A8_SINT:
-		return V_028C70_SWAP_ALT;
-	case PIPE_FORMAT_R8G8_SNORM:
-	case PIPE_FORMAT_R8G8_UNORM:
-	case PIPE_FORMAT_R8G8_UINT:
-	case PIPE_FORMAT_R8G8_SINT:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_I16_UNORM:
-	case PIPE_FORMAT_I16_SNORM:
-	case PIPE_FORMAT_I16_FLOAT:
-	case PIPE_FORMAT_L16_UNORM:
-	case PIPE_FORMAT_L16_SNORM:
-	case PIPE_FORMAT_L16_FLOAT:
-	case PIPE_FORMAT_R16_UNORM:
-	case PIPE_FORMAT_R16_SNORM:
-	case PIPE_FORMAT_R16_UINT:
-	case PIPE_FORMAT_R16_SINT:
-	case PIPE_FORMAT_R16_FLOAT:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_A16_UNORM:
-	case PIPE_FORMAT_A16_SNORM:
-	case PIPE_FORMAT_A16_FLOAT:
-		return V_028C70_SWAP_ALT_REV;
-
-	/* 32-bit buffers. */
-	case PIPE_FORMAT_A8B8G8R8_SRGB:
-		return V_028C70_SWAP_STD_REV;
-	case PIPE_FORMAT_B8G8R8A8_SRGB:
-		return V_028C70_SWAP_ALT;
-
-	case PIPE_FORMAT_B8G8R8A8_UNORM:
-	case PIPE_FORMAT_B8G8R8X8_UNORM:
-		return V_028C70_SWAP_ALT;
-
-	case PIPE_FORMAT_A8R8G8B8_UNORM:
-	case PIPE_FORMAT_X8R8G8B8_UNORM:
-		return V_028C70_SWAP_ALT_REV;
-	case PIPE_FORMAT_R8G8B8A8_SNORM:
-	case PIPE_FORMAT_R8G8B8A8_UNORM:
-	case PIPE_FORMAT_R8G8B8A8_SSCALED:
-	case PIPE_FORMAT_R8G8B8A8_USCALED:
-	case PIPE_FORMAT_R8G8B8A8_SINT:
-	case PIPE_FORMAT_R8G8B8A8_UINT:
-	case PIPE_FORMAT_R8G8B8X8_UNORM:
-	case PIPE_FORMAT_R8G8B8X8_SNORM:
-	case PIPE_FORMAT_R8G8B8X8_SRGB:
-	case PIPE_FORMAT_R8G8B8X8_UINT:
-	case PIPE_FORMAT_R8G8B8X8_SINT:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_A8B8G8R8_UNORM:
-	case PIPE_FORMAT_X8B8G8R8_UNORM:
-	/* case PIPE_FORMAT_R8SG8SB8UX8U_NORM: */
-		return V_028C70_SWAP_STD_REV;
-
-	case PIPE_FORMAT_Z24X8_UNORM:
-	case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+	if (format == PIPE_FORMAT_R11G11B10_FLOAT) /* isn't plain */
 		return V_028C70_SWAP_STD;
 
-	case PIPE_FORMAT_S8X24_UINT:
-	case PIPE_FORMAT_X8Z24_UNORM:
-	case PIPE_FORMAT_S8_UINT_Z24_UNORM:
-		return V_028C70_SWAP_STD_REV;
-
-	case PIPE_FORMAT_R10G10B10A2_UNORM:
-	case PIPE_FORMAT_R10G10B10X2_SNORM:
-	case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
-		return V_028C70_SWAP_STD;
+	if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
+		return ~0;
 
-	case PIPE_FORMAT_B10G10R10A2_UNORM:
-	case PIPE_FORMAT_B10G10R10A2_UINT:
-	case PIPE_FORMAT_B10G10R10X2_UNORM:
-		return V_028C70_SWAP_ALT;
-
-	case PIPE_FORMAT_R11G11B10_FLOAT:
-	case PIPE_FORMAT_I32_FLOAT:
-	case PIPE_FORMAT_L32_FLOAT:
-	case PIPE_FORMAT_R32_FLOAT:
-	case PIPE_FORMAT_R32_UINT:
-	case PIPE_FORMAT_R32_SINT:
-	case PIPE_FORMAT_Z32_FLOAT:
-	case PIPE_FORMAT_R16G16_FLOAT:
-	case PIPE_FORMAT_R16G16_UNORM:
-	case PIPE_FORMAT_R16G16_SNORM:
-	case PIPE_FORMAT_R16G16_UINT:
-	case PIPE_FORMAT_R16G16_SINT:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_L16A16_UNORM:
-	case PIPE_FORMAT_L16A16_SNORM:
-	case PIPE_FORMAT_L16A16_FLOAT:
-		return V_028C70_SWAP_ALT;
-
-	case PIPE_FORMAT_A32_FLOAT:
-		return V_028C70_SWAP_ALT_REV;
-
-	/* 64-bit buffers. */
-	case PIPE_FORMAT_R32G32_FLOAT:
-	case PIPE_FORMAT_R32G32_UINT:
-	case PIPE_FORMAT_R32G32_SINT:
-	case PIPE_FORMAT_R16G16B16A16_UNORM:
-	case PIPE_FORMAT_R16G16B16A16_SNORM:
-	case PIPE_FORMAT_R16G16B16A16_USCALED:
-	case PIPE_FORMAT_R16G16B16A16_SSCALED:
-	case PIPE_FORMAT_R16G16B16A16_UINT:
-	case PIPE_FORMAT_R16G16B16A16_SINT:
-	case PIPE_FORMAT_R16G16B16A16_FLOAT:
-	case PIPE_FORMAT_R16G16B16X16_UNORM:
-	case PIPE_FORMAT_R16G16B16X16_SNORM:
-	case PIPE_FORMAT_R16G16B16X16_FLOAT:
-	case PIPE_FORMAT_R16G16B16X16_UINT:
-	case PIPE_FORMAT_R16G16B16X16_SINT:
-	case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
-		return V_028C70_SWAP_STD;
-
-	case PIPE_FORMAT_L32A32_FLOAT:
-	case PIPE_FORMAT_L32A32_UINT:
-	case PIPE_FORMAT_L32A32_SINT:
-		return V_028C70_SWAP_ALT;
-
-	/* 128-bit buffers. */
-	case PIPE_FORMAT_R32G32B32A32_FLOAT:
-	case PIPE_FORMAT_R32G32B32A32_SNORM:
-	case PIPE_FORMAT_R32G32B32A32_UNORM:
-	case PIPE_FORMAT_R32G32B32A32_SSCALED:
-	case PIPE_FORMAT_R32G32B32A32_USCALED:
-	case PIPE_FORMAT_R32G32B32A32_SINT:
-	case PIPE_FORMAT_R32G32B32A32_UINT:
-	case PIPE_FORMAT_R32G32B32X32_FLOAT:
-	case PIPE_FORMAT_R32G32B32X32_UINT:
-	case PIPE_FORMAT_R32G32B32X32_SINT:
-		return V_028C70_SWAP_STD;
-	default:
-		R600_ERR("unsupported colorswap format %d\n", format);
-		return ~0U;
+	switch (desc->nr_channels) {
+	case 1:
+		if (HAS_SWIZZLE(0,X))
+			return V_028C70_SWAP_STD; /* X___ */
+		else if (HAS_SWIZZLE(3,X))
+			return V_028C70_SWAP_ALT_REV; /* ___X */
+		break;
+	case 2:
+		if ((HAS_SWIZZLE(0,X) && HAS_SWIZZLE(1,Y)) ||
+		    (HAS_SWIZZLE(0,X) && HAS_SWIZZLE(1,NONE)) ||
+		    (HAS_SWIZZLE(0,NONE) && HAS_SWIZZLE(1,Y)))
+			return V_028C70_SWAP_STD; /* XY__ */
+		else if ((HAS_SWIZZLE(0,Y) && HAS_SWIZZLE(1,X)) ||
+			 (HAS_SWIZZLE(0,Y) && HAS_SWIZZLE(1,NONE)) ||
+		         (HAS_SWIZZLE(0,NONE) && HAS_SWIZZLE(1,X)))
+			return V_028C70_SWAP_STD_REV; /* YX__ */
+		else if (HAS_SWIZZLE(0,X) && HAS_SWIZZLE(3,Y))
+			return V_028C70_SWAP_ALT; /* X__Y */
+		break;
+	case 3:
+		if (HAS_SWIZZLE(0,X))
+			return V_028C70_SWAP_STD; /* XYZ */
+		else if (HAS_SWIZZLE(0,Z))
+			return V_028C70_SWAP_STD_REV; /* ZYX */
+		break;
+	case 4:
+		/* check the middle channels, the 1st and 4th channel can be NONE */
+		if (HAS_SWIZZLE(1,Y) && HAS_SWIZZLE(2,Z))
+			return V_028C70_SWAP_STD; /* XYZW */
+		else if (HAS_SWIZZLE(1,Z) && HAS_SWIZZLE(2,Y))
+			return V_028C70_SWAP_STD_REV; /* WZYX */
+		else if (HAS_SWIZZLE(1,Y) && HAS_SWIZZLE(2,X))
+			return V_028C70_SWAP_ALT; /* ZYXW */
+		else if (HAS_SWIZZLE(1,X) && HAS_SWIZZLE(2,Y))
+			return V_028C70_SWAP_ALT_REV; /* WXYZ */
+		break;
 	}
 	return ~0U;
 }